Apparatus for handling heavy loads such as a trolley or a rolling chair for the handicapped
Patent 5036929 Issued on August 6, 1991. Estimated Expiration Date: 
May 21, 2010. 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.
May 21, 2010. 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 2482203 2692652 3231036 3259202 3869011 Stair climbing device Wheelchairs Step-climbing wheel chair Stair-climbing apparatus for wheelchair Wheel chair InventorApplicationNo. 490600 filed on 05/21/1990US Classes:180/8.2, Step or abutment ascending/desending type vehicle180/282, Responsive to sensing of acceleration, deceleration, or tilt of vehicle180/907, MOTORIZED WHEELCHAIRS280/5.22With endless trackExaminersPrimary: Spar, Robert J.Assistant: Katz, Robert S. Attorney, Agent or FirmForeign Patent References
International ClassB62B 005/02Foreign Application Priority Data1988-07-28 FRAbstractAn apparatus for handling heavy loads, such as a wheelchair for the handicapped, wherein a raising/lowering device is equipped with an inclination sensor cooperating with a safety device for stopping the device if a predetermined inclination is exceeded. | |
