Pivotal joint with position-stabilizing spring

Details Pivotal joint with position-stabilizing spring Pivotal joint with position-stabilizing spring

1979-03-23

1980-10-07

Schroeder, Werner H.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Sash balances

Spring

161164, 161167, B14C 2900

Patent

active

042260019

ABSTRACT:
Two relatively swingable members interconnected by a pair of hinge straps are biased into either of two predetermined relative positions, 90.degree. apart, by a hairpin-type leaf spring bearing upon a projection of one hinge strap while being wound about a pintle engaged by the other hinge strap. The leaf spring consists of at least two nested plies of sheet steel, which may or may not be interconnected at one end, each having a thickness which is less than that of a single-ply spring of like material having the same degree of elasticity. The innermost ply is supported by a bushing of plastic material surrounding the associated pintle.

REFERENCES:
patent: 3590420 (1971-06-01), Salice
patent: 3744086 (1973-07-01), Salice
patent: 4065829 (1978-01-01), Lautenschlager

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