Valve structure for hydraulic damper

Details Valve structure for hydraulic damper Valve structure for hydraulic damper

1987-07-14

1989-04-11

Kashnikow, Andres

Brakes

Internal-resistance motion retarder

Valve structure or location

188317, F16F 934

Patent

active

048197734

ABSTRACT:
A hydraulic damper includes a cylinder filled with working oil, a piston rod extending axially in the cylinder, and a piston slidably disposed in the cylinder and fixed to the piston rod, the piston having an oil passage defined therein. A valve structure in the hydraulic damper has a spacer disposed around the piston rod and on one surface of the piston, a leaf valve disposed around the spacer for normally closing an end of the oil passage at the piston surface, and a restriction plate disposed around the piston rod and mounted on the spacer and the leaf valve for allowing the leaf valve to open the end of the oil passage only during one of compression and expansion strokes of the piston with respect to the cylinder.

REFERENCES:
patent: 3747714 (1973-07-01), DeCarbon
patent: 4460074 (1984-07-01), Muller et al.
patent: 4615420 (1986-10-01), Mourray

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