Chairs and seats – Movable back – Tiltable
Patent
1992-10-26
1994-11-15
Crowder, Clifford D.
Chairs and seats
Movable back
Tiltable
2973781, 29737812, 2803041, A47C 400, B62M 100
Patent
active
053641655
ABSTRACT:
A backrest latch assembly (20) is provided for a wheelchair (10) having a movable frame member (11) mounted to a stationary frame member (12) for articulation between a deployed position and a moved position. The latch assembly (20) includes a sliding bolt (22) having a first surface (30) and a base member (23) having a second surface (31). In a latched position, the first surface (30) is oriented in an angularly aligned orientation and cooperates with the second surface (31) to releasably latch the movable frame member (11) to the stationary frame member (12) in the deployed position. The bolt (22) can be axially displaced and rotated to a released position, at which the bolt (22) is retained in a stable condition with the first surface (30) out of engagement with the second surface (31) to allow manual release or disengagement of the bolt (22) without re-latching of the bolt. Thereafter, the movable frame member (11) is free to articulate from the deployed position to the moved position. A biasing mechanism (24) and bolt guiding assembly (44, 45) biases the bolt (22) for automatic movement back to the aligned orientation upon articulation of the movable frame member (11) from the deployed position to the moved position.
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patent: 1326275 (1919-12-01), Koerner
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patent: 4564404 (1986-01-01), Rauschenberger
patent: 4592570 (1986-06-01), Nassiri
patent: 5069503 (1991-12-01), Martinez
patent: 5152543 (1992-10-01), Sims et al.
Crowder Clifford D.
Quickie Designs Inc.
Vanatta Amy B.
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