Article including an endless coil spring

Details Article including an endless coil spring Article including an endless coil spring

1974-04-26

1976-06-29

Marbert, James B.

Spring devices

Coil

Circular

63 5A, F16F 106

Patent

active

039661830

ABSTRACT:
An endless coil spring whose convolutions surround a substantially circular line which extends through the hollow interior of the coil spring. This line surrounds inner portions of the convolutions which press against each other. The convolutions have outer portions which surround the line and which are spaced from each other with these outer portions of the convolutions circumferentially offset with respect to the inner portions thereof.

REFERENCES:
patent: 3087038 (1963-04-01), Bethke
patent: 3250331 (1966-05-01), Boyle
patent: 3323785 (1967-06-01), Mather
patent: 3468527 (1969-09-01), Mather

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