Latch assembly for a convertible sofa bed

Details Latch assembly for a convertible sofa bed Latch assembly for a convertible sofa bed

1992-04-06

1992-10-13

Grosz, Alexander

Beds

Sofa bed

Sliding and pivoting back

5 371, A47C 1717, A47C 1704

Patent

active

051539527

ABSTRACT:
A convertible sofa bed which is convertible to provide a sofa or a bed. The convertible sofa bed has a seat which is hinged to a back and supported by a frame. A pivoting pawl, having a bottom end, is attached to the seat near the hinged point. A notch is provided on the back near the hinge which accepts the pawl when the seat is raised. For example, beginning with the convertible sofa bed in the bed position, lift the front of the seat. As the front of the seat is lifted, the gravitational force influences the pawl to hang in a downward direction. The pawl pivots until the bottom end thereof makes contact with the notch. Once the pawl is engaged, the seat is pressed down creating a tension between the notch and the pawl. By continuing to apply leverage to the seat, the back advances upward forming the sofa configuration. To disengage the pawl from the notch, on the front edge of the seat thereby is lifted, relieving the stress on the pawl thus allowing the pawl to freely swing downward disengaging from the notch. The angular configuration of the notch and the congruent relationship between the notch and the pawl provides a unique readily releasable latch configuration.

REFERENCES:
patent: 835770 (1906-11-01), Williams
patent: 2324675 (1943-07-01), Burton
patent: 2343642 (1944-03-01), Burton
patent: 3634893 (1972-01-01), Hern et al.
patent: 4829611 (1989-05-01), Fireman et al.
patent: 4875244 (1989-10-01), Tremblay

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