Hydraulic damper having variable damping device

Details Hydraulic damper having variable damping device Hydraulic damper having variable damping device

1983-06-01

1985-03-12

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Relative speed of thrust member or fluid flow

188317, 18832215, 267 6415, F16F 9348

Patent

active

045039518

ABSTRACT:
A hydraulic damper includes a cylinder containing hydraulic liquid, a piston slidable in the cylinder and partitioning the interior of the cylinder into two liquid chambers, a passage formed through the piston to communicate the two liquid chambers, a piston rod connected to the piston and extending out of the cylinder, and a valve for controlling the liquid flow in the passage. The piston is axially displaceable relative to the piston rod by a limited amount, and the valve comprises an annular disc mounted on the piston rod and cooperating with one side surface of the piston when the piston abuts with the disc when the piston displaces in one direction and separating from the piston to form a clearance therebetween which acts as an inlet of the passage when the piston displaces in the opposite direction.

REFERENCES:
patent: 1616091 (1927-02-01), Scott
patent: 2346275 (1944-04-01), Read et al.
patent: 2774446 (1956-12-01), de Carbon

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