Latching assembly for a convertible sofa bed

Details Latching assembly for a convertible sofa bed Latching assembly for a convertible sofa bed

1991-10-29

1992-09-15

Grosz, Alexander

Beds

Sofa bed

Sliding and pivoting back

5 371, A47C 1717, A47C 1716

Patent

active

051466406

ABSTRACT:
A convertible sofa which is convertible to provide a sofa or a bed. The convertible sofa has a seat which is hinged to a back and supported by a frame. A pivoting pawl having a tapered edge is attached to the seat near the hinged point. Moreover, a step is provided on the back near the hinge which accepts the pawl when the seat is raised. For example, beginning with the convertible sofa 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 tapered edge makes contact with the step. Once contact is achieved, pressing down on the seat creates a tension between the step 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 step, on the front edge of the seat thereby is lifted, relieving the stress on the pawl thus allowing the pawl to freely swing downward loosing contact with the step. The relationship of the step and the tapered edge on the pawl provides a unique readily releasable latch configuration.

REFERENCES:
patent: 482961 (1889-05-01), Fireman et al.
patent: 835770 (1906-11-01), Williams
patent: 2324675 (1943-07-01), Burton
patent: 2343642 (1944-03-01), Burton
patent: 3634893 (1972-01-01), Hern
patent: 4875244 (1989-10-01), Tremblay

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