Hydraulic shock absorber

Details Hydraulic shock absorber Hydraulic shock absorber

1985-09-27

1987-03-03

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

1374938, 188317, 18832215, 18832222, F16F 934

Patent

active

046468838

ABSTRACT:
A hydraulic shock absorber exhibiting a constant vibration damping force. The shock absorber is provided with a deep groove formed on an upper surface of a piston in a circle where piston ports formed through the piston lie and communicated with the piston ports. The groove has an outer peripheral wall in such a manner that an upper opening is upwardly enlarged.

REFERENCES:
patent: 3078965 (1963-02-01), DeCarbon et al.
patent: 3519109 (1970-07-01), Whisler, Jr.
patent: 4113072 (1978-09-01), Palmer
patent: 4460074 (1984-07-01), Muller et al.

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