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:
Feb. 29, 2000
Filed:
Aug. 27, 1997
Maurice E Swisher, Bidwell, OH (US);
Reliance Electric Industrial Company, Milwaukee, WI (US);
Abstract
A worm gear assembly for a medical mobility apparatus, such as a motorized wheelchair or scooter, comprises a worm and a worm gear. The worm is operatively coupled to a motor shaft of a drive motor of the medical mobility apparatus. The worm gear, which is disposed on an intermediate shaft, is adapted for being driven by the worm and is adapted for driving a drive wheel of the medical mobility apparatus. The worm gear and the worm have a gear ratio of less than 10:1 and the worm has a lead angle in the range of about 20-30.degree.. This arrangement permits the worm gear to selectively drive the worm and permits manual reverse mobility of the medical mobility apparatus.