Alternating state pressure regulation valved damper

Details Alternating state pressure regulation valved damper Alternating state pressure regulation valved damper

1996-07-29

1997-11-25

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Controlled by an operator remote from retarder

18832215, 188317, 188280, F16F 946, F16F 934

Patent

active

056901950

ABSTRACT:
A damper includes a piston that carries a relatively compact control valve for controlling fluid flow through the piston. The control valve provides a variable amount of damping by regulating damper fluid flow between the extension chamber and the compression chamber of the damper during extension and compression strokes. Pressure regulation across the piston is controlled through two alternate flow paths as determined by the control valve. Damping through the first flow path is relatively soft and is determined according to the deflective characteristics of first and second single bi-directional annular disc valves in parallel. Damping through the second flow path is relatively firm and is determined solely by the second bi-directional single annular disc.

REFERENCES:
patent: 4923038 (1990-05-01), Lizell
patent: 5139119 (1992-08-01), Karnopp
patent: 5409088 (1995-04-01), Sonsterod
patent: 5560454 (1996-10-01), Jensen et al.

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