Land vehicles – Wheeled – Occupant propelled type
Patent
1989-12-12
1990-11-06
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
280657, 297433, 297DIG4, A47C 1024
Patent
active
049680510
ABSTRACT:
A trigger activated device for adjusting the inclination of a back frame of a wheelchair including a pair of adjusting assemblies provided on each of two sides of the back frame. Each adjusting assembly includes a horizontally disposed support which is fixed to a rear portion of a seat frame of the wheelchair. A back member is pivotally attached to the support. A threaded bar is pivotally attached to the back frame. A handgrip is attached to an upper portion of the back member. A trigger device disposed under the handgrip. A T-shaped hollow tube having a lug formed at one end thereof includes a first section and a second section protruding from a middle portion of the first section. The T-shaped hollow tube is pivotally mounted on a free end of the support via the lug. The threaded bar passes through the first section of the T-shaped hollow tube. An end cap is provided at a free end of the second section of the T-shaped hollow tube. An engaging block having serrations provided at a first end thereof is provided in the second section. The serrations engages with threads of the threaded bar. A second end of the engaging block is attached to a first end of a cable penetrating the end cap. A second end of the cable is attached to the trigger device. A return spring is provided between the end cap and the second end of the engaging block.
REFERENCES:
patent: 2476769 (1949-07-01), Rideout
patent: 3198575 (1965-08-01), Hawkins
patent: 3881773 (1975-05-01), Rodaway
patent: 4389070 (1983-06-01), Chien
patent: 4598944 (1986-07-01), Meyer et al.
patent: 4655471 (1987-04-01), Peek
patent: 4893827 (1990-01-01), Gay et al.
Kager Alan M.
Marmor Charles A.
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