One-way damping valve mechanism for hydraulic damper

Details One-way damping valve mechanism for hydraulic damper One-way damping valve mechanism for hydraulic damper

1987-07-01

1989-03-07

Reger, Duane A.

Brakes

Internal-resistance motion retarder

Valve structure or location

188320, F16F 9348

Patent

active

048098280

ABSTRACT:
A one-way damping valve mechanism in a hydraulic damper having a first hydraulic chamber defined in a cylinder, and a piston rod having an inner end on which there is mounted a piston slidably fitted in the cylinder, divides the first hydraulic chamber into a second hydraulic chamber and a third hydraulic chamber. The valve mechansim produces a damping force when the piston is moved in a prescribed direction to move working oil from the second hydraulic chamber into the third hydraulic chamber. The valve mechanism comprises a subvalve for defining a first hydraulic passage to generate a damping force when the piston moves at an extremely low speed in the prescribed direction, and a main valve for defining a second hydraulic passage to generate a damping force when the piston moves in a medium/high speed range in the prescribed direction.

REFERENCES:
patent: 2320697 (1943-06-01), Binder
patent: 2740500 (1956-04-01), Brundrett et al.
patent: 4512447 (1985-04-01), Miura

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