Mobile carriage
Patent 7152882 Issued on December 26, 2006. Estimated Expiration Date: 
March 27, 2023. 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, 2023. 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 3618968 3638746 3640192 3653269 Hand operated wheel-chair Wheel chair Ultra narrow enclosed motor vehicles Wheel chair Climbing and descending vehicle Wheelchair and method of operating same InventorsAssigneeApplicationNo. 10397195 filed on 03/27/2003US Classes:280/758, Shiftable-type antiskid counter weights180/8.2, Step or abutment ascending/desending type vehicle180/907, MOTORIZED WHEELCHAIRS280/47.11, Wheel steering by attendant180/210, Having only three wheels404/122, Rotating drum, roller or tire74/84S, Space machines280/250.1, Wheelchair type280/5.26, With spider-type engaging means74/537, Finger lever release180/167, WITH MEANS FOR CONTROLLING OPERATION RESPONSIVE TO ELECTROMAGNETIC RADIATION, MAGNETIC FORCE, OR SOUND WAVES RECEIVED FROM SOURCE, OR REFLECTED FROM OBJECT OR SURFACE, LOCATED APART FROM VEHICLE172/21, LAWN AERATOR OR PERFORATOR, OR PLUG REMOVER180/65.1, Electric280/5.2STEP OR ABUTMENT ASCENDING TYPE VEHICLEExaminersPrimary: Ellis, Christopher P.Assistant: Avery, Bridget Attorney, Agent or FirmInternational ClassB60S 9/00AbstractThe invention provides a mobile carriage which is adapted to shift the center of gravity efficiently by utilizing the weight of wheel rotating means, power source means and control means to thereby increase the weight of a weight portion and reduce the increase in the weight of the entire carriage, the carriage comprising a base frame, a front wheel and a rear wheel which are disposed under the base frame, wheel rotating means coupled to the front wheel and the rear wheel for rotatingly driving the wheels, power source means for the wheel rotating means, center-of-gravity shifting means having a weight portion disposed above the base frame and a mechanism for moving the weight portion relative to the base frame to shift the position of the center of gravity of the base frame by moving the weight portion by the moving mechanism, and control means for controlling the wheel rotating means and the moving mechanism, the carriage being characterized in that at least one of the wheel rotating means, the power source means and the control means is utilized as the weight portion of the center-of-gravity shifting means.Other References
Field of SearchShiftable-type antiskid counter weightsStatic-type antiskid counter weights To prevent vehicle tip or tilt STEP OR ABUTMENT ASCENDING TYPE VEHICLE Wheelchair Wheelchair type Trailer Stepper Step or abutment ascending/desending type vehicle Wheel and stepper type With alternately lifted supporting base and leg With alternately lifted feet or skid Endless or rotary type MOTORIZED WHEELCHAIRS With auxiliary obstacle surmounting means Displaceable wheel shifts or proportions load | |
