Rotary-cam type reclining device

Details Rotary-cam type reclining device Rotary-cam type reclining device

1997-05-20

1998-05-12

Brown, Peter R.

Chairs and seats

Movable back

Tiltable

297362, 74438, B60N 222, B21K 130

Patent

active

057496269

ABSTRACT:
A reclining device comprises a stationary base fixedly connected to a seat cushion, a pivotal, press-worked arm fixedly connected to a seat back and rotatably supported on the base and having an inner toothed portion, at least one toothed block slidably disposed between the base and the arm and having an outer toothed portion meshable with the inner toothed portion, and a rotary cam in cam-connection with the toothed block for producing an outward or inward sliding motion of the toothed block to mesh or unmesh the outer toothed portion with or from the inner toothed portion by rotation of the cam. To balance two contradictory requirements, that is reduction of undue sink mark (lack of fill) and high mechanical strength (high durability), a reinforced portion of a lack-of-fill suppressive geometry and shape, being composed of at least two outside curved faces, is integrally formed with the arm all around the circumferentially-extending stepped portion on an arm outside face opposed to an arm inside face formed with the inner toothed portion.

REFERENCES:
patent: 4275924 (1981-06-01), Lehmann et al.
patent: 4469376 (1984-09-01), Pelz
patent: 4563039 (1986-01-01), Jorg

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