Coil spring

Details Coil spring Coil spring

1989-04-12

1990-09-18

Reger, Duane A.

Spring devices

Coil

Conical

267180, F16F 110

Patent

active

049572784

ABSTRACT:
A coil spring has a strand having a width w and a thickness t, such that 1.1.ltoreq.c.ltoreq.1.7, where c is a ratio determined according to c=w/t. Further, the strand has a cross-sectional shape defined by a plurality of partial curves, which are portions of a clothoid, a curve whose radius varies inversely in proportion to its length. Further, the partial curves are combined to form a closed loop. The tangent lines of any adjacent two of the partial curves of the coil spring, at their boundaries where they are combined, are oriented in the same direction.

REFERENCES:
patent: 4735403 (1988-04-01), Matsumoto et al.

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