Impact damper

Details Impact damper Impact damper

1998-06-30

2000-02-22

Butler, Douglas C.

Spring devices

Resilient shock or vibration absorber

Bumper

188297, 188371, 188374, 267 6415, 267116, 293133, F16F 916, B60R 1902

Patent

active

060271051

ABSTRACT:
An impact damper includes two tubes which are slidable one in the other for braking a vehicle impact against an obstacle by hydraulic damping forces and pneumatic spring forces. The inner tube is closed off by a bottom. A gas chamber containing a high pressure gas cushion is arranged adjacent to the bottom and bounded by a separating piston that is guided sealingly and displaceably in the inner tube. A first fluid chamber is arranged between the separating piston and a partition fixed in the inner tube and provided with choke openings. A second fluid chamber is formed by the outer tube and connected to the first fluid chamber via the partition. The outer tube has a tapering region directed away from the partition, and a deformation element dividing the second fluid chamber into two part chambers.

REFERENCES:
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patent: 3993294 (1976-11-01), Wossner et al.
patent: 4022451 (1977-05-01), Voigt
patent: 4181198 (1980-01-01), Lindberg
patent: 4641872 (1987-02-01), Lohr et al.
patent: 4915363 (1990-04-01), Prozeller et al.
patent: 4934749 (1990-06-01), Folarin
patent: 4988081 (1991-01-01), Dohrmann
patent: 5064030 (1991-11-01), Wossner
patent: 5174421 (1992-12-01), Rink et al.
patent: 5443146 (1995-08-01), Ayyildiz et al.
patent: 5884959 (1999-03-01), Hillan

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