Hydraulic damper of a damping force adjusting type

Details Hydraulic damper of a damping force adjusting type Hydraulic damper of a damping force adjusting type

1995-05-19

1997-08-12

Poon, Peter M.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

188318, 18832213, 280714, F16F 946

Patent

active

056556330

ABSTRACT:
A piston connected to a piston rod is slidably mounted in a cylinder, and a lower cylinder chamber is connected to a reservoir. An extension side passage for communicating an upper cylinder chamber with the lower cylinder chamber and a compression side passage for communicating the cylinder chamber with the reservoir are provided with disc valves, respectively, behind which extension side and compression side back pressure chambers are formed. The extension side back pressure chamber is communicated with the upper and lower cylinder chambers through a fixed orifice and ports. The compression side back pressure chamber is communicated with the lower cylinder chamber and the reservoir through a fixed orifice and ports. By rotating a shutter, flow areas of the ports are changed to adjust orifice features and pressures in the extension side and compression side back pressure chambers are changed to adjust valve features.

REFERENCES:
patent: 5328004 (1994-07-01), Fannin et al.

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