Wheelchair motorizing apparatus
Patent 6805209 Issued on October 19, 2004. Estimated Expiration Date: 
March 27, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 27, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2765860 3288234 Stair-climbing conveyance Wheel chair Patent #: 5395129 InventorApplicationNo. 10107641 filed on 03/27/2002US Classes:180/9.32, With auxiliary obstacle surmounting means280/5.22, With endless track180/907, MOTORIZED WHEELCHAIRS180/9.3Wheel or track contacts groundExaminersPrimary: Morris, Lesley D.Assistant: Luby, Matthew Attorney, Agent or FirmInternational ClassB62D 55075AbstractA wheelchair motorizing apparatus employs an articulated tread drive in combination with front support wheels and rear drive wheels. The tread drive is used to provide traction during the ascent or descent of stairs or the traversing of obstacles, the front support wheels are used to raise and lower the front of the wheelchair, and the rear drive wheels are used to raise and lower the rear of the wheelchair in addition to providing drive traction and steering. A positioning mechanism integral with the tread drive acts to keep the treads in contact with the terrain or stairs. | |
