Self-releasing ratchet-type seat adjustment

Details Self-releasing ratchet-type seat adjustment Self-releasing ratchet-type seat adjustment

1986-09-29

1987-12-01

Dorner, Kenneth J.

Chairs and seats

Bottom or back with means to alter contour

297313, 297356, A47C 300, A47C 746

Patent

active

047099615

ABSTRACT:
In the self-releasing pawl and ratchet mechanism of this invention, for controlling positions of adjustment of a seat element that is movable relative to a frame element, one member of the pawl-ratchet pair is fixed to one of those elements, the other member is confined to movement relative to the other element in directions transverse to the directions of adjustment of the seat element. A latch for locking the pawl and ratchet members out of engagement with one another is carried by the element that carries the movable member of the pawl-ratchet pair and is actuated in the adjustment directions, between latching and release positions, by a lost motion connection with the other element. In its release position the latch is disengaged from the movable member of the pawl-ratchet pair. In its latching position, wherein it is releasably retained, as by friction, the latch holds that movable member in a ratchet disengaged position.

REFERENCES:
patent: 773720 (1904-11-01), Drury
patent: 970635 (1910-09-01), Matthes
patent: 2120156 (1938-06-01), Simpson
patent: 4589696 (1986-05-01), Kanai et al.
patent: 4621864 (1986-11-01), Hill

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