No-shear power recline system for wheelchairs

Details No-shear power recline system for wheelchairs No-shear power recline system for wheelchairs

1994-12-21

1996-09-17

Nelson, Jr., Milton

Chairs and seats

Legrest or footrest interconnected to move relative to...

297DIG4, 29742326, A47C 102

Patent

active

055561578

ABSTRACT:
This device is primarily designed for use on a powered wheelchair. The device utilizes a back frame (35) with an attached sliding backrest (21). The back frame (35) is electro-mechanically powered and pivotly attaches to the rearward side of seat frame members (32), allowing the back frame (35) to angle away from the seat frame members (32) in a reclining motion. When the back frame (35) reclines, it forces telescoping linkages (7) through seat frame members (32), extending the leg rests (14) forwardly away from the seat frame members (32). By pinning the top of the leg rests (14) back to the seat frame members (32), the forward motion forces the leg rests (14) to articulate in an upward motion. The backrest (21) is also attached to the telescoping linkages (7) by tie rods (15) through slots (34) in the sides of the seat frame members (32). When the telescoping linkages (7) move forward, they pull the backrest (21) with them, eliminating the shearing forces to the occupant. All design advantages and claims will become apparent from a consideration of the ensuing descriptions and drawings.

REFERENCES:
patent: 2849051 (1958-08-01), Streeter, III
patent: 3858938 (1975-01-01), Kristensson et al.
patent: 4039223 (1977-08-01), Kristensson
patent: 4333681 (1982-06-01), Nelson
patent: 4339013 (1982-07-01), Weigt
patent: 4655471 (1987-04-01), Peek
patent: 4966379 (1990-10-01), Mulholland
patent: 5044647 (1991-09-01), Patterson
patent: 5263768 (1993-11-01), Scheulderman
patent: 5297021 (1994-03-01), Koerlin et al.

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