Flow sensitive, acceleration sensitive shock absorber

Details Flow sensitive, acceleration sensitive shock absorber Flow sensitive, acceleration sensitive shock absorber

1997-10-14

2000-09-19

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

With fluid regulated in response to inertia of valve member

F16F 934

Patent

active

061198307

ABSTRACT:
An acceleration sensitive shock absorber has a tubular housing and a piston assembly in the housing dividing the housing into an upper chamber and a lower chamber. The piston is connected to the wheel of a vehicle and the housing is connected to the chassis of the vehicle. Fluid can pass between the upper and lower chambers with a restricted flow rate during either extension or compression of the shock absorber. There is a first port for providing fluid flow from the lower chamber to the upper chamber upon downward acceleration of the wheel. A movable inertia valve in the piston assembly opens the first port when acceleration of the wheel of the vehicle is greater than a predetermined magnitude for increasing flow between the chambers. In addition, there is a first orifice downstream from the first port for creating hydraulic pressure which biases the inertia valve in an open position in response to fluid flow between the chambers. There is a second port or passage for providing fluid flow from the upper chamber to the lower chamber. A second orifice upstream from the second which provides hydraulic pressure to decrease the response time during compression.

REFERENCES:
patent: 4254849 (1981-03-01), Pohlenz
patent: 4917222 (1990-04-01), Bacardit
patent: 4953671 (1990-09-01), Imaizumi
patent: 4997068 (1991-03-01), Ashiba
patent: 5332068 (1994-07-01), Richardson et al.
patent: 5462140 (1995-10-01), Cazort et al.

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