Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1979-01-12
1980-04-15
Reger, Duane A.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
F16F 9348
Patent
active
041979290
ABSTRACT:
A device for producing the damping force in a hydraulic shock absorber comprising a non-return valve element adapted to open in the compression stroke so as to permit the free flow of working oil, a leaf valve element adapted to deflect downwards under the pressure of the working oil flowing through the holes formed in the non-return valve element during the expansion stroke, thereby providing the damping force, and a support shim interposed between the non-return valve element and the leaf valve element. The leaf valve element and the support shim are interposed between a piston and a valve stop. The support shim has such an outer diameter that its outer periphery is in contact or in slightly radially inwardly spaced relationship with the inner circle of the annulus containing the holes of the non-return valve, whereby the variations in damping force produced by the deflections of the leaf valve element may be avoided, the service life or durability of the leaf valve element may be improved and the shock may be eliminated when the non-return valve element is closed.
REFERENCES:
patent: 3029903 (1962-04-01), Wasdell
Jecies Saul
Kayaba Kogyo K.K.
Reger Duane A.
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