{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8517321","patent":{"patent_number":"US-8517321","title":"Gravity compensation apparatus","assignee":null,"inventors":[],"filing_date":"2010-12-28T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["G06F"],"num_claims":4,"abstract":"A gravity compensation apparatus is provided, including a force output device, an axis and an arm with the axis as rotational center. The present invention is to output a force via the force output device to the arm when the arm contacts the force output device. When the arm rotates in the first or second quadrants, the contact point between the arm and the force output device will change continuously so that the force rotation speed of the force output device, the effective length of the lever arm and the force-applying angle will also change accordingly. Through appropriate design, the generated torque value can show a non-linearly increasing curve approximately to a sin function between 0-90°."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Gravity compensation apparatus","description":"A gravity compensation apparatus is provided, including a force output device, an axis and an arm with the axis as rotational center. The present invention is to output a force via the force output de","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8517321","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-8517321","citation_suggestion":"Patentable. \"Gravity compensation apparatus\" (US-8517321). https://patentable.app/patents/US-8517321","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8517321","json":"https://patentable.app/api/llm-context/US-8517321","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T16:45:17.125Z"}