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:
Oct. 08, 1996
Filed:
May. 15, 1995
Sen-Jung Chen, Taipei, TW;
Other;
Abstract
A wheel assembly for a wheelchair includes a mounting plate fixed on one side of the seat portion, a motor and a gear unit which includes a gear disc, and a gear shaft that extends through the gear disc. The motor includes a driving worm fixed on the motor shaft so as to mesh with the gear disc. The gear disc is formed with an engaging recess. The gear shaft carries a slidable transverse key thereon. A spring biases the gear shaft to engage the key in the recess. A driving gear is fixed on the gear shaft. A driven gear is mounted rotatably on the mounting plate and is fastened to a wheel. A chain interconnects the driving gear and the driven gear. A hand lever can be moved against the bias action of the spring so as to disengage the key from the recess of the gear disc.