Tilt chair control mechanism

Details Tilt chair control mechanism Tilt chair control mechanism

1977-12-29

1979-07-17

Mitchell, James C.

Supports

Resilient support

Torsion bar or bushing

A45D 1904

Patent

active

041613058

ABSTRACT:
A control mechanism for a tilt seat chair includes a control body supported in a relatively stationary position by a fixedly attached vertical post member. A torsion unit comprising a pair of resiliently urged concentric sleeves extends through opposed sidewalls of the control body forwardly of the post member and includes a forwardly extending tension lever having adjusting means constantly bearing against a case hardened transverse plate carried by the control body. A chair seat spider assembly pivotedly supported solely by the innermost sleeve of the torsion unit normally abuts, in its at-rest-position, nonmetallic forward stop means carried by the control body and is limited in rearward tilting displacement by abutment of the same spider assembly with rear stop ramps comprising integral portions of the control body disposed rearwardly of the vertical post member.

REFERENCES:
patent: 2008209 (1935-07-01), Herold
patent: 3552796 (1971-01-01), Williams
patent: 3592433 (1971-07-01), Fuhrman
patent: 3598354 (1971-08-01), Williams

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