Adjustable Gas Burner, Gas Burner System Including an Adjustable Gas Burner, and Appliance Including a Gas Burner System

This disclosure relates to gas burners. An example gas burner can be used in a gas cooktop or stovetop, a gas range or stove, etc. (collectively referred to as gas cooking appliances). However, the gas burner can be used with other appliances that use a gas burner.

This disclosure relates to an adjustable gas burner assembly for a gas burner system, such as for use in a gas cooking appliance. This disclosure also relates to an adjustable gas burner assembly having an adjustable burner arm. This disclosure further relates to a gas burner system having the adjustable gas burner assembly.

This disclosure relates to a gas and air mixing assembly for a gas burner system. This disclosure also relates to a gas and air mixing assembly having one or more gas and air mixing chambers. This disclosure further relates to a gas burner system having the gas and air mixing assembly.

The disclosure relates to a motion assembly for a gas burner system. The disclosure also relates to a motion assembly having a motor and a gear system. This disclosure further relates to a gas burner system having the motion assembly.

The disclosure relates to a knob assembly for a gas burner system. The disclosure also relates to a gas burner system having the knob assembly.

One example environment for a gas burner system is a kitchen gas cooktop appliance. A conventional gas cooking appliance with a conventional gas burner can include, for example, a traditional circular-shaped burner. A gas cooking appliance might include one or more burners of varying sizes, the burners may be sealed or open on top. A knob may operate to both ignite and control the size of flame or flame area produced by the burner. A user may use a smaller burner for smaller cooking vessels and a larger burner for larger cooking vessels. Although a user may be able to adjust the size of flame, e.g., to accommodate a smaller or larger cooking vessel, the resulting heat zone may not be adequate for the application. For example, a user may desire to increase the size of the flame to quickly heat a cooking vessel. However, in some applications, increasing the size of the flame may conversely cause the flames to spill beyond the edge of the cooking vessel. In another scenario, a user may desire to keep a large cooking vessel at low heat. Resorting to using larger flames may make it difficult to control a desired temperature.

A new and useful adjustable gas burner, a gas burner system including the adjustable gas burner, and an appliance including the adjustable gas burner system are desired.

For some environments, using an adjustable burner arm to adjust the size of the usable flame area or heat zone can enable a user to accommodate pans of different sizes while still controlling the size of the flame. This would allow a user to avoid heat loss when the gas flow is increased, for example, when the flame area spreads beyond the cooking vessel. Conversely, when gas flow is reduced, an adjustable burner arm can be used to increase the usable flame area while maintaining a smaller flame. Thus, in embodiments, an adjustable gas burner system can adjust the size of the usable flame area while additionally allowing a user to control the size of the flame produced by the burner. Also, an adjustable gas burner system can produce a larger usable flame area compared to conventional gas burners.

In one or more embodiments, this disclosure relates to a gas burner system comprising a burner assembly including an ignition system and an adjustable burner arm. The gas burner system further comprises a motion assembly including a gear system coupled to the adjustable burner arm and a motor coupled to the gear system. The burner system additionally includes a controller for controlling the burner assembly and the motion assembly. The adjustable burner arm is moveable between a first position and a second position, and the adjustable burner arm is adjustable to a location between the first position and the second position. The adjustable burner arm is a first adjustable burner arm, and the burner assembly further includes a second, third, and fourth respective adjustable burner arm and the gear system is coupled to the second, third, and fourth respective adjustable burner arm.

In one or more embodiments, this disclosure relates to a gas burner system comprising an ignition system, a primary adjustable burner arm, a secondary adjustable burner arm, and a motor coupled to the primary adjustable burner arm, the motor configured to control the primary adjustable burner arm and the primary adjustable burner arm configured to control the secondary adjustable burner arm. The primary adjustable burner arm and the secondary adjustable burner arm are adjustable within a range between a first position and a second position. The first position is a retracted position, and the second position is an expanded position, and the gas burner system produces a smaller heat zone in the retracted position and a larger heat zone in the expanded position. The gas burner system further includes a controller to operate the primary adjustable burner arm and the secondary adjustable burner arm. The controller includes a knob assembly comprising a knob configured to control the ignition system and a flow of gas and air mixture of the gas burner system, and a knob bezel configured to control the motor. Rotating the knob bezel in a first direction causes the primary adjustable burner arm to rotate in the respective first direction, and rotating the knob bezel in a second direction causes the primary adjustable burner arm to rotate in the respective second direction.

In one or more embodiments, this disclosure relates to a cooking appliance having the gas burner system.

These and other features, advantages, and embodiments of apparatus and methods according to this invention are described in, or are apparent from, the following detailed descriptions of various examples of embodiments.

It should be understood that the drawings are not necessarily to scale. In certain instances, details that are not necessary to the understanding of the invention or render other details difficult to perceive may have been omitted. It should be understood, of course, that the invention is not necessarily limited to the particular embodiments illustrated herein.

Within the scope of this application, it is expressly intended that the various aspects, embodiments, examples, and alternatives set out in the preceding paragraphs, and the claims and/or the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and all features of any embodiment can be combined in any way and/or combination, unless such features are incompatible. The applicant reserves the right to change any originally filed claim or file any new claim accordingly, including the right to amend any originally filed claim to depend from and/or incorporate any feature of any other claim although not originally claimed in that manner.

One or more specific embodiments will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation are described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

show prior art gas burnersA,B in a cooktop appliance environment. Various gas fuels (e.g., propane, butane, natural gas, etc.) can be used. Gas burnersA,B may be ignited using a pilot light or an electric ignition source (e.g., an igniter). Conventional burners vary in size and may be open (A) or sealed (B), for example, with a burner top. Other burner types and variations are known. The gas burners ofare used for showing some of the underlying elements of a gas burner and for providing background to the adjustable gas burner (or burner systems) described herein.

shows an example flame area or heat zone produced by a traditional sealed burnerA. A user may adjust the flow of gas to increase or decrease the size of the flame produced by the burner to accommodate different cooking vessels. Although a user may adjust the flow of gas, the flame area may not adequately nor evenly heat the cooking vessel. In some scenarios, the flames may be too large for the cooking vessel or too inconsistent to achieve a desired result. Further, a user may not be able adequately direct heat in the manner desired.

An adjustable gas burner according to the present disclosure allows a user to control the size of the flame produced by the burner while simultaneously controlling the size of the usable flame area. For example, when the gas flow is reduced, and the flame produced is smaller, adjustable burner arms can be rotated outwards to increase the flame area and apply heat more evenly to the cooking vessel while still maintaining a reduced gas flow. In the opposite scenario, when gas flow is increased and the flame produced is larger, the burner arms can be rotated inwards to keep the flame focused on the bottom of the cooking vessel as opposed to spilling beyond the sides of the cooking vessel. While the adjustable gas burner is described for use with, for example, a residential cooking appliance, it should be appreciated that other applications are possible. Such applications include, but are not limited to, professional/commercial gas cooking appliances, stand-alone cooking appliances, stand-alone gas burner systems, portable gas burner systems, outdoor cooking appliances, grill systems, camping gas stove systems, laboratory gas burner systems, etc.

Referring to, a first adjustable gas burner systemis disclosed.shows an isometric view of an example adjustable gas burner systemin a compacted/retracted position. The adjustable gas burner system, also referred to hereinafter as gas burner system or burner system, may operate similarly to a conventional style burner, for example, using a knob to operate an igniter and to adjust a flow of gas. In the first example, the adjustable gas burner systemoccupies a compacted position when in an off state. In operation, a user may choose to keep the adjustable gas burner in the compact position to accommodate smaller cooking vessels or to direct heat to a centralized location beneath a cooking vessel. In some examples, a knob (such as in) may be used to actuate rotation of the adjustable burner arms in addition to controlling a flow of gas at the burner. A user may partially or fully extend the burner arms within a set movement range to adjust the usable flame area or size of heat zone produced by the adjustable gas burner system. For example,shows an example heat zone of an adjustable gas burner in an expanded position. However, a user may position the burner arms along any location between the compact and expanded positions. In the figure, flames of various sizes are shown to demonstrate the range of flame sizes possible. An outline of an example heat zone is shown in broken lines. In the illustration, the outline signifies an example minimum and maximum size flame produced by the burner system. It should be understood that the outline is an arbitrary identifier and the flames produced may not always be consistent in size. In some situations, it may be desirable for a user to fully extend the burner arms while choosing to maintain a reduced gas flow. This may be particularly useful, for example, when a user needs to apply low or moderate heat to a larger cooking vessel, without the need to increase gas flow or increase flame size. Thus, in this and other examples, the adjustable gas burner systemfunctions to provide a user greater control over the desired heat zone, making it easier to apply and/or distribute heat in a more even manner.

At a high level, the adjustable gas burner systemincludes a gas burner assembly, a gas and air mixture assembly, and a motion and control assembly. To facilitate describing an example adjustable gas burner system, portions of the burner assemblywill be described in conjunction with an upper assembly, which may also be considered the portion of the gas burner systemviewable to a user when installed. Referring again to, the upper assembly, includes upper housing plate. Upper housing plate(hereinafter referred to as plate) can be die cast and machined to specification. In the illustration, plateis substantially circular and an upper surfaceincludes structural projectionsto receive additional components of the upper assembly. A lower surfaceof platecan additionally include structural projections. In one example, the structural projectionmay extend from upper surfaceto facilitate coupling a component of a central burner. In another example, the structural projectionmay extend from lower surfaceand may be shaped or configured to enclose internal components of the burner system. In other words, structural projectionscan serve more than one purpose. In the example shown, platefunctions as both a mounting point as well as a housing component (e.g., enclosing internal components of the burner system). Side surfaceextends from a perimeter edgeof plate; together, side surfaceand plateform a cap or cover-like structure. An annular lip or edgeprotrudes around the circumference of side surface. In some examples, edgemay be a mounting point, for example, to install the adjustable gas burner systemin a gas cooktop environment. Platefurther includes a plurality of apertureswhich are disposed in projectionsto accommodate components of the upper assembly. In the construction in the figures, structural projectionsand aperturesserve as both a mounting point for various burners (and their components) and additionally facilitate a flow of gas and air mixture to each of the burners.

A substantially cylindrically shaped center burneris provided centrally located on plate. An axis of platealigns with an axis of the center burneralong A. In the example, a portionof the center burneris inset or indented to accommodate an ignition source. In other examples, the ignition source may be located beyond an outer circumference of the center burner. Center burnermay be integral with plateor a separate component coupled thereto. It should be understood that center burneris fixed or stationary relative to the adjustable burner arms. In the construction shown, center burnerincludes a hollow columnextending distance D() from plateand a circular shaped burner head covercoupled to an upper endof column. Head covermay be fastened to upper endwith a fastener or may be freely resting. In the example, burner head coveris sized and shaped to cap or cover upper end, forming an enclosed space. In some examples, such as the example shown in, a perimeter edgeof burner head coverextends beyond an outer surfaceof columnsuch as to overhang the upper circumferential edge of column. The perimeter edgemay be curved and act to uniformly guide the flame produced by the center burner. Burner head coveradditionally includes a sealing edgeprovided on an underside surfaceof the burner head cover. Best shown in the sectional view of, sealing edgemay extend within upper endsuch that the sealing edge matches an inner profile of column. Moreover, sealing edgemay be shaped to match a profile of an inner surfaceof column. When assembled on column, perimeter edgeand sealing edgeprevent gas and air mixture from escaping through the top of center burner.

Upper endfurther includes a plurality of aperturesextending from an inner surfaceto an outer surfaceof column. In the example shown in the figures, aperturesare formed around a circumference of columnto allow the release of gas and air mixture. In the figures, aperturesare consistently spaced around the circumference of columnto prevent flame overlap. However, in other examples, aperturesmay not span the entire circumference of column. Although a limited number of flames are shown infor example, center burnermay have a varying number of apertures. Aperturesmay be any standard or non-standard geometric shape including but not limited to square, circular, or rectangular shaped apertures. In some examples, aperturesmay taper from one end to another or may be elongated in either a vertical or horizontal plane. It should be understood that many different combinations of shapes of apertures are possible. In the example shown, burner head coverprovides the means to cap upper endof columnsuch that the flow of gas within center burnerchanges directions from a first direction to a second direction. More specifically, burner head covermay aid in directing the flow of gas and air mixture to aperturesand out of center burnerto the external environment. Additionally, while center burneris shown and described in conjunction with adjustable burner arms, the center burner may operate independently to serve alternative functions. For example, center burnermay function as a simmer burner, capable of producing smaller gauge flames. In such an example, gas/air mixture can be cut off from burner arms.

In the example in, an ignition systemis provided to ignite the center burner. The example ignition system can include an igniter, a spark module, and a controller. High voltage sent to the igniteris used to create an initial spark, which is amplified by spark module. In the construction, the ignition systemis positioned adjacent to but spaced from center burner. Ignitermay be mounted at an apertureof plate. The spark moduleof ignitercan extend a distance Dfrom plate. A non-exposed portion of the igniter can extend within plateand may be electrically coupled to the burner system. In a non-limiting example, a knob may be used to operate the igniter. In other examples however, an alternative operational mechanism may be used including but not limited to, for example, a mechanical button or switch. A user may additionally, or alternatively activate the igniter using an application or program configured for use on an electronic device (cell phone, remote, smart device, etc.) or a (touch) display provided on the cooktop. Ignition systemmay comprise any standard electrical ignition system or source, such as an electronic ignition system. However, it should be understood that other ignition sources are possible. For example, ignition systemmay, in some examples, include a pilot light to ignite the adjustable gas burner system.

shows a second example adjustable gas burner systemB. In the construction shown, plateB operates as a central burnerB. IgniterB is disposed adjacent to but spaced from an outer surface of columnB. In the example, igniterB is provided at edgeB. An upper endB of columnB includes a plurality of aperturesB. In the construction, an upper surface of the central burnerB is configured with four adjustable gas burner arms which may be coupled to structuresB at aperturesB. Other configurations are possible. In this example, the usable flame area or heat zone exists on more than one plane. Similar to the first example, central burnerB can operate as a simmer burner.

Referring again to, burner assemblyincludes adjustable gas burner armsto adjust the shape and size of the usable flame area of the burner system. In a non-limiting example, four adjustable gas burner arms(referred to herein as gas burner arms, burner arms, or arms) are shown. Although, it should be understood that other combinations or numbers of arms are possible (e.g., two arms, three arms, five arms, etc.). In the figures, each armis shaped to assemble into, or form, a circular orientation when in a fully retracted or compact position. This orientation is advantageous when igniting the adjustable gas burner system. However, the adjustable burner arms can additionally be ignited when in an expanded position. Individually, burner armsmay resemble a crescent shape (e.g., kidney shape, bean shape, etc.) or similar geometrically compatible shape that allows for retracting in the manner shown and described. In the figures, burner armsare substantially curved having an inner curved surface, and an outer curved surface. Width Wseparates inner curved surfaceand outer curved surface. Inner and outer surfaces,may also be considered to have an arching or arcuate shape. For example, in a non-limiting example, inner surfacemay match a contour or profile of a circumference of center burner. In other examples, the burner armsmay be bent as opposed to curved. Other shapes of burner arms are possible. In the construction, inner surfaceand outer surfaceextend from bottom surface.

Each burner armincludes a first endand a second end. First endcan be understood to be anchored, but rotatable about a mounting point, while secondmay be understood to be freely movable. Arc() separates first endand second end. In the construction shown in, each respective end,is substantially round or semi-circular including respective curved surfaces,. A diameter of the semi-circular ends,may be substantially similar to width W. In the figures, curved surfaces,extend from bottom surfacesuch that inner and outer surfaces,and curved surfaces,form a bean-shaped column. Each burner armis provided with a plurality of aperturesformed around a perimeter of columnadjacent an upper endof column. Aperturesmay have a similar shape to aperturesand can extend from an inner surfaceof columnto an outer surface. It is envisioned that aperturesmay be any standard or non-standard geometric shape including but not limited to square, circular, or rectangular shaped apertures. Aperturescan taper from one end to another or may be elongated in either a vertical or horizontal plane. It should be understood that many different combinations of shapes of apertures are possible.

A burner arm head coveris provided to cover each burner arm. Burner arm head coveris sized and shaped to cap or cover an upper endof column. In the example shown, a perimeter edgeof burner head coverextends beyond an outer surfaceof columnso as to overhang the upper circumferential edge of column. Burner arm head coveradditionally includes a sealing edgeprovided on an underside surfaceof the burner arm head cover. As shown in the cross-sectional view of, sealing edgemay extend within upper endsuch that the sealing edge matches an inner profile of column. That is, sealing edgemay be shaped to match a profile of an inner surfaceof column. Thus, bottom surface, column, and burner arm head coverform an enclosed space. First endof burner armmay be mounted about axis Awithin closed spaceas is shown in. Each burner armis coupled to apertureand mounted to structureusing a fastener. Apertureand mounting structureadditionally serve as a means to supply each burner armwith gas/air mixture from beneath the unit. Referring again to, burner armsextend a distance Dfrom platesuch that both the center burnerand each burner armextend substantially coplanar for even heat distribution (i.e., Dis substantially similar to D). In other words, flames produced by center burnerand each individual burner armmay be substantially coplanar. In the example in, the burner systemis a fully compact, such as when first igniting the burner system. When retracted, burner armsdo not overlap one another and the ends,of each burner arm are sufficiently spaced from one another. This may be beneficial to prevent hot zones from forming, for example, where flames from a first burner armA may overlap with flames from a second burner armB. However, it is envisioned that the burner armsform an annular or ring-like shape around the center burnerwhen fully compact. Accordingly, when a user ignites the burner system, the center burnerignites first, before passing the flame to each individual burner arm.

When actuated, burner armsmay rotate about first endto increase or decrease the overall size of the burner systemor the usable flame area. Meaning, a single adjustable burner systemmay be suitable for a range of cooking vessels, for example, six to twelve inches in diameter. One of skill in the art can appreciate that the adjustable burner systemdescribed herein is scalable; smaller and larger applications are possible. Burner armsmay rotate within a defined range, for example, zero degrees (when fully compact) to ninety degrees (when fully expanded). Smaller or greater ranges (degrees) of rotation are possible; however, the shape of the burner armsmay be a limiting factor of rotation. Additionally, whether the system includes a raised center burnermay also impact burner arm rotation. In the example shown, burner armsare displaced at length Lfrom axis Awhen compact. When fully extended, burner armsmay reach a maximum displacement of Lfrom axis A(i.e., Lis greater than L). For the construction in the figures, each burner armrotates in unison with one another. Thus, the adjustable gas burner systemcan increase or decrease in size at a constant rate. In other examples, each burner armmay individually rotate (i.e., each arm may move independent of one another) to reach a desired orientation. This may be useful, for example, to heat cooking vessels having different shapes (e.g., rectangular, oval, etc.). Accordingly, the adjustable gas burner systemmay advantageously provide the same or better heating capabilities when compared to a multi-unit or modular gas burner system.

Referring to, the adjustable gas burner systemadditionally includes a lower assemblyopposite upper assembly. In the figures, lower assemblyrepresents the components of burner systemnot visible to a user when the burner systemis installed (i.e., the inner/lower components of the system). Best shown in, lower assemblyincludes, in first part, a lower housing plateconfigured to couple to plateand to enclose a portion of the burner system. One or more aperturesare provided on platefacilitate passage for components of the gas burner system. The lower assembly additionally includes a gas and air mixture assemblyand a motion and control assembly.

A gas source can be coupled to the gas and air mixture assemblyby way of a dual gas orifice apparatus. Dual gas orifice apparatus (also referred to as gas orifice apparatus, or simply apparatus)functions to receive one or more gas sources to support both the central burnerand each adjustable gas burner arm. Gas orifice apparatusmay be machined from aluminum, steel, brass, or alloy thereof. In the example construction, apparatusincludes two inletsand two outlets. Inletscan differ slightly, for example, a first inlet may have a first diameter, while a second inlet may have a second diameter, greater than the first diameter. In other examples, inlets may have consistently sized diameters. Gas sources, including but not limited to butane, propane, natural gas, etc., can be coupled via tubing, hose, or other conventional means to inlets. For the example in the figures, a first inlet is provided on a first surfaceof apparatusand a second inlet is provided on a second surface, opposite the first surface. In other examples, both inlets may be provided on the same surface. Within apparatus, passageways couple a respective inletto a respective outletsuch that one inlet leads to one outlet. The passageways may include one or more bends or curves. In the example shown, outletsextend vertically from within apparatusto upper surface. Generally, outletsmay resemble cavities having a substantially cylindrical inner shape in part. A portion of each outletmay be countersunk within upper surface. In the construction in the figures, outletsare arranged adjacent one another but spaced apart slightly. As shown, outletsare provided with threadsto facilitate coupling to orifices,, which provide a means to throttle gas exiting from apparatus. However, other means of fastening are possible. Best shown in the sectional view, orifices,include a hollow channel or passage extending through a center column-like structure. A first end of each orifice,is threaded to be coupled to a respective outlet, while a second end is open-ended to exhaust gas from the apparatus. In the illustration, orifices,have varying diameters, e.g., to accommodate varying burner types such as the central burnerand adjustable burner arms. For example, an adjustable gas burner systemhaving a smaller central burner and larger adjustable burner arms may correspond to a smaller orifice diameter to feed the central burner and a larger orifice diameter to feed the adjustable gas burner arms. It should be understood that this example is non-limiting. Moreover, the dual gas orifice apparatuscan have outlet orifices,of differing diameters allowing for greater or reduced gas flow to each burner type, depending on the necessity. In the example construction, orifices,are separate components coupled to apparatus. In other examples, orifices,may be integral apparatus.

The gas and air mixture assemblyadditionally includes a first gas and air mixing chamber, and second gas and air mixing chamber, which may be integral with one another. In the construction, first and second gas and air mixing chambers,are integral and form a singular component configured to direct the flow of gas and air mixture in first part, to the central burner, and in second part, to each respective burner arm. Gas exiting the dual gas orifice apparatusfollows one of two respective gas passageways, also referred to herein as gas path(GP), and gas path(GP), and into respective first and second gas and air mixing chambers,where air is mixed with gas before traveling to each burner. Standard fasteners may be used to couple first and second gas and air mixing chambers,to plate. While the example shows first and second mixing chambers,as a singular member, each respective chamber,may instead be provided as separate components.

shows the first gas and air mixing chamberpositioned above outletto receive gas from orifice. In the example, mixing chamberis displaced a distance Dfrom orificeto allow air to enter the chamber in combination with the gas. Mixing chambermay be generally cylindrical in shape and can extend vertically a distance Dto meet and couple to lower surfaceof plate. An inner profile of mixing chambercan resemble an hourglass shape. For example, in the construction shown, a lower endof mixing chamberis chamfered, including an annular beveled surfaceto direct gas and air mixture inwards towards a hollow center cavityof chamber. Beveled surfacemay extend from lower enda distance Dinto cavity. Above beveled surface, an inner surfaceof mixing chambercomprises an upper angled surface which extends a distance D. A profile of cavitymay taper, from either endor lower surfaceof plate, towards the transition pointbetween beveled surfaceand inner surface. In the example shown, transition pointhas a smaller diameter compared to the diameter of chamberat endand at the end adjacent plate, thus forming a funnel-like shape on either side of transition point. Generally, beveled surfacefunctions to funnel, and in some cases, limit the amount of gas and air mixture passing into the chamber. Referring to the arrows in the example in, upper angled surfacefunctions to aid in mixing the gas and air mixture and to aid in directing the flow of the gas and air mixture (i.e., GP). Thus, in many examples, distance Dmay be greater than distance D; however, other orientations are possible. It should be appreciated that distances D-Dare shown in an arbitrary manner and are not exact; distances D-Dcan vary depending on the desired gas to air ratio. Also, it should be understood that the shape, size, and orientations of both beveled surfaceand upper angled surfacecan vary. For example, beveled surface may extend at an angle relative to lower endranging from ten to eighty degrees, which may limit or allow gas and air to enter chamber. Conversely, upper angled surfacecan extend at an angle relative to the lower surfaceof plateranging from, for example, thirty to eighty-five degrees. It should be understood that these ranges are meant to be non-limiting examples.

Referring again to the arrows in the example of, gas pathbegins at inletand passes through dual gas orifice apparatusbefore being diverted to outlet, through orifice, and into first gas and air mixing chamber. GPcontinues through plateby way of apertureand into the enclosed space within columnof center burnerbefore being expelled via the plurality of aperturesto an outer environment. While GPis shown in the figures as being relatively straight (i.e., not including many bends or curves), one or more surfaces may cause GPto change directions or to advance gas and air mixture to the burner. For example, inner surfaceof chamberor the lower surfaceof platemay urge the gas and air mixture along the passageway.

With reference to, the gas and air mixture assemblyincludes a second gas and air mixing chamber. The second mixing chambercan have a first regionA and a second regionB coupled above the first region. The first regionA of the second mixing chamber is substantially cylindrical and is positioned above the dual gas orifice apparatus. In the figures, the first regionA of the second mixing chamber is positioned a distance Dabove orifice. Like the first gas and air mixing chamber, the first region of the second mixing chambercomprises a hollow inner cavityto facilitate mixing of air and gas. Inner cavitymay have an hourglass profile which extends vertically a distance Dfrom lower endto lower surface. In the example, inner cavityextends a distance Dfrom lower endto intersectionwhich will be described later. Gas and air entering lower endof mixing chamberis guided or funneled into cavityby a chamfered surface. In the construction shown, chamfered surfaceis an angled surface, having an annular profile which is beveled inwards towards cavity. The profile may function as a funnel shape configured to direct the gas and air mixture inwards and upwards towards cavity. Surfacemay extend a distance Dfrom lower endinto cavityof the second gas and air mixing chamber. Above beveled surface, an inner surfaceof mixing chambercomprises an upper angled surface which extends a distance Dfrom lower surfaceinto cavity. A profile of cavitycan taper, from either endor lower surface, towards the transition pointbetween beveled surfaceand inner surface. In the example shown, transition pointhas a smaller diameter compared to the diameter of chamberat endand at the end adjacent plate. In other words, the differing diameters form a funnel-like shape on either side of transition point. It should be appreciated that distances D, D, D, and Dare shown in an arbitrary manner and are not exact. Moreover, these distances can vary. Also, it should be understood that the shape, size, and orientations of both beveled surfaceand upper angled surfacemay differ compared to the representation in the figures. In various examples, beveled surface may extend at an angle relative to lower endranging from ten to eighty degrees, which may limit or allow gas and air to enter chamber. Upper angled surfacecan, for example, extend at an angle relative to the lower surface of plateranging from thirty to eighty-five degrees.

Referring now to, the second regionB of mixing chambercomprises an intersectionand a perimeter region. In some examples, the second regionB may be integral with the first regionA. In other examples, the second regionB can be coupled to the first regionA. In the construction shown, the first and second regions of the second mixing chamberare integral with one another, forming a single or unitary component. More specifically, the second regionB is positioned co-axial with first regionA. In the figure, intersectioncomprises a substantially cross-like shaped channel structure making up a central portionof the second regionB. Intersectionis positioned above the first regionA, more specifically, above cavity. Perimeter regioncomprises an annular or ring-shaped channel structure occupying an outer regionand surrounding the central region. Intersectionand perimeter regionare coupled to one another such that gas and air mixture flows unobstructed from intersectioninto perimeter region. In the example, intersectionand perimeter regionare formed as a single component and additionally include support structuresformed in the hollows between intersectionand perimeter region. Support structuresmay accommodate additional components of the burner system, such as for example, igniteror first gas and air mixing chamber. In one or more locations, the perimeter regioncan include aperturesto facilitate fastening components of the burner system. Best represented in, a height of intersectionand the perimeter regionis the difference between distances Dand D. In, respective inner walls,of intersectionand perimeter regionare spaced respective distances Dand Dapart. In the example shown, Dis greater than D. However, it should be appreciated that these distances are arbitrarily shown and may not be exact, other configurations are possible.

In, arrows show potential paths for the gas and air mixture traveling along gas pathway. Intersectionand perimeter regionserve to evenly split the gas and air mixture traveling along GPinto one of four directions before directing the mixture to a respective burner arm. In the example, plateis fastened above mixing chamber. When coupled to plate, intersection, perimeter region, and the lower surfaceof plate, together, form a network of enclosed gas paths for the gas and air mixture to travel within. The network of gas paths form a singular, contiguous volume. In another example, burner armscan be fed from a singular larger volume as opposed to a network of gas paths. In the example in the illustration, intersectionis a four-way intersection. However, other implementations are possible, for example, a two-way intersection may be sufficient for a gas burner systemhaving only two adjustable burner arms. Generally, intersectioncomprises the same number of outlets as there are burner arms. As shown, gas and air mixture traveling from the first regionA of mixing chamberis directed from intersectionto perimeter regionbefore being urged to one of the four burner arms. In the example construction, each respective burner arm is located in an area above the perimeter region, and specifically positioned split equidistant (path-wise) between an outlet (-) of intersection. For example, gas and air mixture traveling to burner armA may make passage from either outletor outlet.

In the example, gas pathbegins at inletand passes through dual gas orifice apparatusbefore being diverted to outlet, through orifice, and into second gas and air mixing chamber. GPcontinues through the first regionA of mixing chamberbefore passing into the second regionB. Gas pathis evenly divided at intersectionbefore flowing to perimeter region. From the perimeter region, GPis directed through structuresand aperturesof plateand into the enclosed space within columnsof each respective burner armprior to being expelled via the plurality of aperturesto an outer environment. Comparatively to GP, GPincludes a plurality of curves or bends causing the gas and air mixture to change directions. As is shown in the figures, mixing chambercomprises curved or rounded inner surfaces, especially with reference to intersectionand perimeter zone. Rounded surfacesin the perimeter zone may help to direct passage of the gas and air mixture. Moreover, the structural design of mixing chambermay advantageously aid in evenly distributing gas and air mixture to each respective burner arm.

Referring now to, an example motion and control assemblyis shown. The motion and control assembly can include a gear system, a motor assembly, and a controller.shows a perspective view of the lower assemblywith the lower housing plateremoved. In the example, gear systemis an epicyclic gear set or gear train, also referred to herein as a planetary gear system. Gear systemmay include a central or sun gear, planetary gear(s), and a carrier. Sun gearand planetary gear(s)can be spur gears which mesh with one another, i.e., sun gearand planetary gear(s)have compatible teeth. In the example, axis of the sun gearand planetary gear(s) are parallel with one another. Sun gearand planetary gear(s)may have varying gear ratios, such as for example, 40:15 or 2.67 to 1. In the construction, sun gearhas a plurality of teethformed around an outer circumference. A central region of the sun gearincludes a guide slotand an aperture. One or more guide slotsmay be disposed adjacent the outer circumference of sun gear. In the example, guide slotshave a rounded, arcing shape and are configured to receive guideposts or pinsextending from carrier. It should be appreciated that both the size of the arc length and the gear ratio can affect the extent to which each adjustable burner armmay rotate. In examples having 1:1 gear ratio, a smaller arc length slot serves to limit the amount of rotation, while a larger arc length slot can increase the amount of rotation. Generally, it is envisioned that guide slotsare shaped and sized to allow for roughly ninety degrees of rotation for burner arms.

shows a cutaway perspective view of the planetary gear systemin conjunction with a respective burner arm. Like sun gear, planetary gear(s)include a plurality of teethprotruding around an outer circumference. Each planetary gearis coupled to a shaftusing standard fasteners. In the example construction, each respective planetary gearis coupled adjacent to a lower endof shaft. A fastener is used to couple a respective burner armto an upper endof shaftsuch that a rotation of the planetary gearcorrelates to a rotation of the burner arm. In the example shown, upper endof shaftis enclosed within the cavity of each burner arm. A spring may be provided along shaftto keep each respective burner arm level with one another. Additionally, the region surrounding shaftis open to allow the flow of gas and air mixture within the burner arm cavity. For the example in the figures, the planetary gearscan include a primary planetary gear′ and secondary planetary gears. The primary planetary gear′ may drive the gear system. More specifically, primary planetary gear′ is coupled to sun gear, which is in turn coupled to secondary planetary gears. While one example planetary gear train is shown and described, other gear train configurations are possible.

In, the sun gearis shown mounted to an upper surface of carrier. Carrieris generally circular or ring-shaped, having a flat upper surface and a flat lower surface. In the example construction, a portion of carrierA is shaped to accommodate additional components of the burner system. Carrier portionA may have a larger radius compared to the remainder of the carrier. In various examples, carrier portionA is shaped to allow carriera small degree of rotation within the planetary gear system. The upper surface of carrier can include one or more guideposts or pinsextending therefrom. Generally, pinsare disposed in an expected location beneath guide slotsof sun gear. As shown in, pinsmay be sized and shaped to mesh smoothly with slots. In a non-limiting example, three pinsare used and an upper surface of the pins extend coplanar with an upper surface of sun gear. However, other configurations are possible.

The motion and control assemblyadditionally includes a motor assembly. Referring to, the motor assembly is shown coupled to primary planetary gear.′ Motor assemblycan include a motorand a driving gear shaft. In the example shown, motoris coupled to the primary planetary gear′ by way of driving gear shaft. Motormay be coupled to an electrical power source and is additionally coupled to a controller. In various constructions, motormay be, for example, a direct current (DC) motor or synchronized motor. Other electrical motors are possible. In at least one example, the motormay include a potentiometer to vary the voltage supplied to motor and thus controlling an output speed driving gear shaft. The controllermay be used to control a speed of the motor. Referring to, an upper end of driving gear shaftcan include one or more pegs or pinsto rotationally fix gear shaftto the primary planetary gear.′ In the figures, three pinsare shown extending into a lower surface of primary planetary gear′. While pins are used to fasten driving gear shaftto the primary planetary gear;′ other fasteners may be used.

Turning to, an example controlleris shown. In the figures, controllerincludes a knob assembly, which may be coupled to motor assemblyto control the burner system. Knob assemblycan include a rotatable knoband a rotatable knob bezel. In various examples, knob assemblymay operate like a conventional knob-controlled gas burner system. For example, a user may push or press the knobto activate igniter. Rotating the knobin a first direction may increase the flow of gas and air mixture thus increasing the size of flame produced by the burner. Conversely, rotating the knobin a second direction (opposite the first direction) decreases the flow of gas and air mixture. Moreover, a user can use the knobto control and/or adjust the size of the flame produced by the burner system. The knob bezelcan be used to control the size of the heat zone desired. For example, rotating knob bezelin a first direction can actuate the burner armsto expand. A rotation in a second direction, opposite the first direction, can actuate the burner armsto retract.

While the controlleris shown and described as a knob assembly, other methods of controlling the burner systemare possible. A momentary switch can be used to control the system. In another example, a touch screen display can be used to control actuation of the burner system.

One or more of the disclosed embodiments, alone or in combination, may provide one or more technical effects including providing a means to increase or decrease the size and/or intensity of, or change the shape of, a heating zone of a gas burner system. The technical effects and technical problems in the specification are exemplary and are not limiting. It should be noted that the embodiments described in the specification may have other technical effects and can solve other technical problems.

As utilized herein, the terms “approximately,” “about,” “substantially,” and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise characteristics provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the invention as recited in the appended claims.

It should be noted that references to relative positions (e.g., “top” and “bottom,” “upper” and “lower,” “left” and “right,” “front” and “back,” “in” and “out”) in this description are merely used to identify various elements as are oriented in the Figures. It should be recognized that the orientation of particular components may vary greatly depending on the application in which they are used.

For the purpose of this disclosure, the term “coupled” means the joining of two members directly or indirectly to one another. Such joining may be stationary in nature or moveable in nature. Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another. Such joining may be permanent in nature or may be removable or releasable in nature.

The terms “fixedly,” “non-fixedly,” and “removably,” and variations thereof, may be used herein. The term “fix,” and variations thereof, refer to making firm, stable, or stationary. It should be understood, though, that fixed doesn't necessarily mean permanent-rather, only that a significant or abnormal amount of work needs to be used to make unfixed. The term “removably,” and variations thereof, refer to readily changing the location, position, or station. Removably is meant to be the antonym of fixedly herein. Alternatively, the term “non-fixedly” can be used to be the antonym of fixedly.

The terms “a” and “an,” as used herein, are defined as one or more than one. The term “plurality,” as used herein, is defined as two or more than two. The term “another,” as used herein, is defined as at least a second or more. The terms “including” and/or “having,” as used herein, are defined as comprising (e.g., open language). The phrase “at least one of . . . and . . . ” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. As an example, the phrase “at least one of A, B, and C” includes A only, B only, C only, or any combination thereof (e.g. AB, AC, BC, or ABC).

It is also important to note that the construction and arrangement of the system, methods, and devices as shown in the various examples of embodiments is illustrative only, and not limiting. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many various alternatives, modifications, variations, improvements and/or substantial equivalents, whether known or that are or may be presently foreseen, are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements show as multiple parts may be integrally formed, the operation of the interfaces may be reversed or otherwise varied, the length or width of the structures and/or members or connector or other elements of the system may be varied, the nature or number of adjustment positions provided between the elements may be varied (e.g. by variations in the number of engagement slots or size of the engagement slots or type of engagement). The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the various examples of embodiments without departing from the spirit or scope of the present inventions. Therefore, the invention is intended to embrace all known or earlier developed alternatives, modifications, variations, improvements and/or substantial equivalents.