Double-tube oscillation damper

Details Double-tube oscillation damper Double-tube oscillation damper

1990-03-12

1990-11-20

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Including seal or guide

188318, F16F 918, F16F 934, F16F 936, B60G 1306

Patent

active

049711822

ABSTRACT:
In a double-tube oscillation damper a pressure relief valve is provided adjacent a piston rod guiding and sealing device between a leakage gas collecting chamber and an annular space confined between the cylinder and a container surrounding the cylinder. This pressure relief valve comprises an elastic annular membrane which is supported in radial and axial direction by a support ring. This support ring has a sleeve portion providing a circumferential, substantially radially directed support face for the elastic annular membrane and an annular bottom disc for fastening the support ring with respect to the piston rod guiding and sealing device. A radially outwardly directed lip is provided in the transition area between the sleeve and the bottom disc. This lip is integral with the sleeve and the bottom disc.

REFERENCES:
patent: 4055352 (1977-10-01), Allinquant et al.
patent: 4189033 (1980-02-01), Katsumori
patent: 4445598 (1984-05-01), Brambilla
patent: 4482036 (1984-11-01), Wossner et al.
patent: 4494632 (1985-01-01), De Baan et al.
patent: 4508020 (1985-04-01), Szcupak
patent: 4542811 (1985-09-01), Miura
patent: 4821850 (1989-04-01), Geiling et al.

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