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. 02, 1990
Filed:
May. 13, 1988
Troy W Livingston, Northbrook, IL (US);
Livingston Products, Inc., Northbrook, IL (US);
Abstract
A wheelchair is provided with an endless track drive for travel over rough ground. The endless track drive is detachably connected to the wheelchair by a frame such that a lower run of each of the endless tracks is located adjacent a lower periphery of each wheel. The chair in the wheelchair is kept low so that the occupant is not lifted so high as to experience a substantially different elevation when travelling on the endless track as when traveling on the wheels. A suspension preferably in the form of a flexible sheet allows one forward end of an endless track to be moved vertically independently of the forward end of the other endless tracks. Preferably, the endless drive is an attachment that is easily clamped to the wheelchair and is made mostly of plastic that is lightweight and easily cleaned and provides a low cost for the attachment.