Fluid pressure devices

Details Fluid pressure devices Fluid pressure devices

1983-02-25

1989-05-23

Reger, Duane A.

Spring devices

Vehicle

Comprising compressible fluid

156 731, F16F 932

Patent

active

048323179

ABSTRACT:
A fluid-pressure device for example a bellows-type spring, in which a terminal portion of the spring is compressed between an end member (4) and an annular pressure piece (11) to provide a fluid-tight seal and an additional fluid-tight seal is provided by welding mutually opposed joint surfaces (16,13) of the end member and the annular pressure piece. The end member and the pressure piece may be of thermoplastic material and welded together by ultrasonic or friction welding.

REFERENCES:
patent: 3321200 (1967-05-01), Polhemus et al.
patent: 3444018 (1969-05-01), Hewitt
patent: 3462803 (1969-08-01), Horton
patent: 4222974 (1980-09-01), Smith
patent: 4231824 (1980-11-01), Cooper

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