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. 04, 1990
Filed:
Dec. 19, 1988
Hans W Korber, Kiel, DE;
Reinhard Koster, Kiel, DE;
Ewald Linse, Heikendorf, DE;
Dieter Simmat, Kiel, DE;
Ortopedia GmbH, Kiel, DE;
Abstract
The electric wheel-chair comprises drive wheels on one axle group, and swivel wheels on a second axle group, with the swivel wheels being either freely pivotable or positively steerable by an engageable steering drive. The positive steering system may have either a purely electric configuration in the form of a pair of electric steering drives, or an electro-mechanical configuration in the form of a common steering drive and a mechanical steering mechanism with electro-mechanical disengagement of the positive steering system. Switch-over from pivoting to steering operation is monitored by position sensors provided on the swivel wheels. As the seat assembly is adapted to be rotated to a corresponding position, the swivel wheels may be operated alternatively as the front wheels or the rear wheels of the wheel-chair. Owing to the engageable steering drive, the wheel-chair is well adapted for both indoor operation and outdoor operation, thereby considerably enhancing the mobility of a disabled person.