Impact damper

Details Impact damper Impact damper

2005-07-05

2005-07-05

Siconolfi, Robert A. (Department: 3683)

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

C188S371000, C267S126000, C267S064260, C267S064280, C293S134000

Reexamination Certificate

active

06913126

ABSTRACT:
An impact damper for deceleration of a vehicle impacting on all obstacle by hydraulic damping forces and gas spring forces includes at least inner and outer pipes telescopically displaceable one inside the other and defining an annular space therebetween with a base closing one end of the inner pipe. A dividing piston is sealingly guided in the inner pipe. The inner pipe, the base, and the dividing piston define a gas space which holds gas under pressure. The inner pipe further defines a first liquid space separated from the gas space by the dividing piston. An intermediate wall is fastened to the inner pipe and includes a throttle opening therethrough connecting a second liquid space to the first liquid space. The annular space between the first and second pipes has one end sealed to the atmosphere and another end sealed by the intermediate wall. The annular space is connected to the second liquid space by a flow connection having a valve.

REFERENCES:
patent: 3722874 (1973-03-01), Kress
patent: 4078638 (1978-03-01), Koyama et al.
patent: 4381857 (1983-05-01), Cook
patent: 4564176 (1986-01-01), Schnetz
patent: 5024465 (1991-06-01), Baiker
patent: 5242157 (1993-09-01), Bonenberger et al.
patent: 5285877 (1994-02-01), Bonenberger et al.
patent: 6109400 (2000-08-01), Ayyildiz et al.
patent: 6655509 (2003-12-01), Dohrmann et al.

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