Double-tube vibration damper

Details Double-tube vibration damper Double-tube vibration damper

1987-03-27

1989-04-18

Kashnikow, Andres

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

18832218, 92 82, 137312, 1375137, F16F 906, F16F 936

Patent

active

048218502

ABSTRACT:
For a double-tube vibration damper which comprises an axially proceeding groove in the cylinder for by-passing the piston valves, a piston is provided which possesses a satisfactory sealing and guidance function in the cylinder. This is achieved in that the piston comprises a rigid piston ring arranged in a piston groove and acting as sealing ring against the cylindrical surface, while the piston comprises a second piston ring groove for the reception of a guide ring consisting of a piston ferrule. In this case at least one relief passage is provided which connects the second piston ring groove and/or the space situated between the piston ring grooves with the working chamber remote from the piston rod.

REFERENCES:
patent: 2206110 (1940-07-01), Myers et al.
patent: 2723006 (1955-11-01), Wyeth
patent: 3338257 (1967-08-01), Ferguson
patent: 3735992 (1973-05-01), Prostorov et al.
patent: 4166522 (1979-09-01), Bourcier de Carbon

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