Body support ratcheting mechanism

Details Body support ratcheting mechanism Body support ratcheting mechanism

1997-02-19

1999-03-30

Nelson, Jr., Milton

Chairs and seats

Armrest

Adjustable to multiple use positions relative to bottom or back

29741131, 29734422, 248118, 24828911, A47C 754

Patent

active

058879480

ABSTRACT:
A body support ratcheting mechanism for a medical or dental chair or stool. The body support ratcheting mechanism includes a shaft that is attached to the chair or stool. A body support member is attached to the top or upper surface of the mechanism. Within the mechanism a ratchet, mounted to the shaft, and a pawl, mounted within the mechanism housing, allow the body support member to be pivoted toward the abdomen of the chair occupant to a comfortable position. When the occupant leans against the body support ratcheting mechanism, the body support is held in position by the interlocking contact of the pawl and a ratchet gear tooth. For ease of egress from and ingress to the chair, the occupant can depress a spring biased release arm that allows for the body support member to be swung away from the chair.

REFERENCES:
patent: 3338626 (1967-08-01), Hamilton
patent: 4429918 (1984-02-01), Alsup, Jr. et al.
patent: 4438975 (1984-03-01), Williams
patent: 4452487 (1984-06-01), Plowman
patent: 5490716 (1996-02-01), Naughton

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