Hydraulic damper

Details Hydraulic damper Hydraulic damper

1995-08-16

1997-01-28

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188318, 188315, F16F 946

Patent

active

055970540

ABSTRACT:
A hydraulic damper has a first oil chamber, a second oil chamber, a communication mechanism defining a communication oil passage, the first and second oil chambers communicating with each other through the communication oil passage, and a damping force adjusting mechanism for varying a cross-sectional area of the communication oil passage to adjust damping forces. The damping force adjusting mechanism includes an adjusting rod having an end disposed in a portion of the communication oil passage, the adjusting rod being movable toward and away from the communication oil passage to vary the cross-sectional area of the communication oil passage, an eccentric cam rotatably disposed in engagement with an opposite end of the adjusting rod, and a rotary actuator for rotating the eccentric cam to move the adjusting rod toward and away from the communication oil passage to adjust the damping forces.

REFERENCES:
patent: 3559776 (1971-02-01), Schultze
patent: 3848710 (1974-11-01), Thompson et al.
patent: 4036335 (1977-07-01), Thompson et al.
patent: 4305486 (1981-12-01), Cowan
patent: 4313529 (1982-02-01), Kato et al.
patent: 4666180 (1987-05-01), Shirakuma
patent: 4813519 (1989-03-01), Matsuhara et al.
patent: 4936423 (1990-06-01), Karnopp
patent: 5351790 (1994-10-01), Machida
patent: 5480011 (1996-01-01), Nagai et al.

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