The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2010
Filed:
Mar. 28, 2008
Bart Kylstra, San Francisco, CA (US);
Nathan Isaiah Jauvtis, San Francisco, CA (US);
Thomas Martin Cook, San Francisco, CA (US);
Jeremy Winston Huff, San Francisco, CA (US);
Sean Kerrel, Oakland, CA (US);
Bart Kylstra, San Francisco, CA (US);
Nathan Isaiah Jauvtis, San Francisco, CA (US);
Thomas Martin Cook, San Francisco, CA (US);
Jeremy Winston Huff, San Francisco, CA (US);
Sean Kerrel, Oakland, CA (US);
Daedalus Wings, Inc., San Francisco, CA (US);
Abstract
A drive mechanism for a lever propulsion wheelchair includes at least one clutch and at least one gear set contained within a central hub housing operatively coupled to the drive surface of the main wheel being driven. In the preferred embodiment, there are additional clutches and gear sets contained within the hub housing and coaxial to the wheel. By locating the transmission components within the hub housing and providing the coaxial arrangement, various user capabilities may be enabled without a significant increase in wheelchair width, as compared to the width of conventional pushrim propulsion wheelchairs. Transmission components are cooperatively arranged to provide capabilities that may include forward, rearward and neutral 'gears,' braking, anti-rollback, and quick-release removal.