Shock absorber

Details Shock absorber Shock absorber

1988-10-19

1990-04-17

Halvosa, George E.

Brakes

Internal-resistance motion retarder

With fluid regulated in response to inertia of valve member

137 39, 188299, 18832214, 18832215, F16F 934

Patent

active

049172220

ABSTRACT:
A shock absorber comprises a tubular working cylinder (12) to be mounted on a suspended part of a vehicle, with a piston rod assembly (26) received slidably in the working cylinder (12) having an end (28) to be mounted on a fixed part of the vehicle. The piston rod assembly (26) has at its free end a piston member (40) cooperating with the working cylinder (12) to divide the interior thereof into an upper (52) and a lower working chamber (50), with a valve mechanism in the piston member (40) to permit controlled two-way flow between the upper and lower working chambers (52, 50). A mass (58) is mounted in the shock absorber and displaceable in response to a predetermined acceleration of the shock absorber from a first position in which the mass closes a passage (56, 54, 90) between the working chamber (52) and a reservoir (50; 22), and a second position in which the passage (56, 54, 90) is open.

REFERENCES:
patent: 2774448 (1956-12-01), Hultin
patent: 3039566 (1962-06-01), Rumsey
patent: 3127958 (1964-04-01), Szotak
patent: 3338347 (1967-08-01), Avner
patent: 3380560 (1968-04-01), Katz
patent: 4638896 (1987-01-01), Poyser

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