Molded piston for a hydraulic damper

Details Molded piston for a hydraulic damper Molded piston for a hydraulic damper

1990-04-23

1991-12-10

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

18832222, F16F 900

Patent

active

050709712

ABSTRACT:
A molded piston for a shock absorber is formed as a cylindrical member having a central, axial opening for receiving a piston rod. A plurality of unrestricted axial openings are provided in the piston radially outbound of the central opening and aligned substantially parallel to the axis of the piston to serve as primary flow passages. A plurality of axial grooves are provided on the circumference of the piston to serve as secondary flow passages. A flexible, circumferential valving ring is integrally molded at one end of the piston for permitting only one-way flow of fluid through the secondary flow passages as the piston reciprocates in an inner cylinder.

REFERENCES:
patent: 2507267 (1950-05-01), Patriquin
patent: 2723846 (1955-11-01), Holder et al.
patent: 2774447 (1956-12-01), De Carbon
patent: 2821268 (1958-01-01), De Carbon
patent: 2912069 (1959-11-01), Dillenburger
patent: 3109520 (1961-09-01), Vossieck
patent: 3343833 (1967-09-01), Fader
patent: 3484096 (1969-12-01), Mahoney
patent: 3747714 (1973-07-01), De Carbon
patent: 3777861 (1973-12-01), Breed
patent: 4307873 (1981-12-01), Moders
patent: 4532856 (1985-08-01), Taylor

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