Piston for a pneumatic, hydraulic, or hydropneumatic installatio

Details Piston for a pneumatic, hydraulic, or hydropneumatic installatio Piston for a pneumatic, hydraulic, or hydropneumatic installatio

1981-09-28

1984-03-27

Reger, Duane A.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

18832215, F16F 919

Patent

active

044388330

ABSTRACT:
A piston for a pneumatic, hydraulic or hydropneumatic fluid-filled cylinder includes a constantly open throttled passage therethrough comprised by at least one spiral-shaped throttled channel extending in a plane perpendicular to the piston axis. The spiral configuration of the throttled channel permits the use of a relatively large flow cross section in the channel, thereby preventing clogging of the throttling passage by contaminants entrained in the damping medium, while still providing the desired damping effect.

REFERENCES:
patent: 3323550 (1967-06-01), Lee
patent: 3362508 (1968-01-01), Mayer
patent: 3672474 (1972-06-01), Mayer et al.
"Technical Hydraulic Handbook", 5th Ed., The Lee Company, Westbrook, Connecticut, pp. 88-131, (1971).

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