Constant center of gravity lift and tilt mechanisms for a wheelchair seat
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Mar 3, 2005
app pub date -
Aug 13, 2004
filing date -
Aug 15, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A lift mechanism for a wheelchair includes a parallelogram linkage and an actuator for moving the linkage between a retracted position and an extended position to raise and lower a chair. One link of the linkage is slidingly engaged with a rail member. Movement of the linkage is constrained by another link such that as the chair is raised and lowered, the longitudinal position of an occupant's center of gravity relative to the wheelchair frame is substantially maintained. The lift mechanism may be combined with a tilt actuator to allow rotation of the chair. A chair tilt mechanism is also provided having a tilt actuator, a first link slidingly engaged with a rail member and a second link constraining movement of the first link. The tilt mechanism is capable of tilting the chair while substantially maintaining the longitudinal position of the occupant's center of gravity.
First Claim
Family
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Cited Art Landscape
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