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:
Sep. 09, 2003
Filed:
Aug. 17, 2001
Applicant:
Inventors:
Joseph B. Richey, II, Chagrin Falls, OH (US);
Theodore D. Wakefield, II, Vermilion, OH (US);
Assignee:
Invacare Corporation, Elyria, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D 1/104 ;
U.S. Cl.
CPC ...
B62D 1/104 ;
Abstract
A motorized wheelchair is advantageously provided with a rate-of-turn feedback sensor and with forward/reverse motion, lateral motion, and vertical motion acceleration feedback sensors that are integrated into a closed-loop wheelchair servo control system to differentially control the rotational speed of wheelchair opposed motor-driven wheels and thereby obtain improved wheelchair motion stability through reduction/elimination of likely wheelchair spin-out and wheelchair tipping during wheelchair operation.