Spring devices – Coil – Circular
Patent
1995-09-25
1997-07-01
Young, Lee W.
Spring devices
Coil
Circular
267180, 267155, F16F 106
Patent
active
056428758
ABSTRACT:
A coil spring wherein the external surfaces of the convolutions have cylindrical major portions and flats which abut the neighboring convolutions when a spring is compressed flat under load. This reduces the likelihood of radial displacement of one or more convolutions under load and the likelihood of a reduction of the axial length of the coil spring when in its unstressed condition subsequent to being repeatedly compressed flat under load. The external surface of each convolution can be provided with one or two flats, and the planes of the two flats preferably make a small acute angle if the coil spring is caused to assume an arcuate shape when in actual use.
REFERENCES:
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patent: 1643073 (1927-09-01), Laughlin
patent: 2096039 (1937-10-01), Higgins
patent: 2700540 (1955-01-01), de Juhasz
patent: 3354670 (1967-11-01), Fawick
patent: 4735403 (1988-04-01), Matsumoto et al.
patent: 4923183 (1990-05-01), Saka
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patent: 5052664 (1991-10-01), Lesher et al.
patent: 5080215 (1992-01-01), Forster et al.
patent: 5161660 (1992-11-01), Huber
Albers Albert
Felger Robert
LuK Lamellen und Kupplungsbau GmbH
Young Lee W.
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