Pressure balanced torsion system for a backrest and the like

Details Pressure balanced torsion system for a backrest and the like Pressure balanced torsion system for a backrest and the like

1992-01-14

1994-09-20

Dorner, Kenneth J.

Chairs and seats

Bottom or back

Cushioned

2974521, 267154, A47C 735

Patent

active

053483782

ABSTRACT:
The pressure balanced torsion system is for use in a backrest and the like. The system has a plurality of torsion action assemblies. Each assembly consists of a pair of pressure bearing plates mounted at the free ends of a torsion spring. The torsion spring is pivotally mounted to a rigid support plate which forms the back plate of the backrest. When a body rests against the backrest, the counter reactive force generated by the assembly causes both pressure bearing plates to push back against the body until the torsion is balanced, thus providing a uniform support to the body.

REFERENCES:
patent: 3067453 (1962-12-01), Lyons

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