{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8515594","patent":{"patent_number":"US-8515594","title":"Towbarless airplane tug","assignee":null,"inventors":[],"filing_date":"2009-11-25T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["G06F"],"num_claims":20,"abstract":"An airplane tug for receiving a landing gear of an airplane. Tug comprises a chassis for receiving the landing gear, a propulsion arrangement for moving tug, force sensor(s) for measuring a force exerted by the chassis on the gear due to a speed differential between tug and airplane, and a controller for altering movement parameter(s) of tug for maintaining the force below a value. Propulsion arrangement comprises a variable angle swash plate hydraulic pump coupled to a variable angle swash plate hydraulic motor and to a bypass path valve such that fluid circulates between the pump and motor to activate the arrangement to increase the speed and/or traction force when bypass path is in a closed state, and the fluid circulates across the motor via the valve to reduce a rotational speed and/or traction force of the tug when the path is in an opened state."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Towbarless airplane tug","description":"An airplane tug for receiving a landing gear of an airplane. Tug comprises a chassis for receiving the landing gear, a propulsion arrangement for moving tug, force sensor(s) for measuring a force exer","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8515594","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8515594","citation_suggestion":"Patentable. \"Towbarless airplane tug\" (US-8515594). https://patentable.app/patents/US-8515594","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8515594","json":"https://patentable.app/api/llm-context/US-8515594","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T01:34:17.907Z"}