Hydraulic shock absorber

Details Hydraulic shock absorber Hydraulic shock absorber

1997-05-21

1999-08-24

Butler, Douglas C.

Spring devices

Vehicle

Comprising compressible fluid

267DIG2, B60G 17044

Patent

active

059415088

ABSTRACT:
A hydraulic shock absorber including a cylinder having a hydraulic fluid sealed therein, a reservoir connected to the cylinder so that a pressure is always transmitted between the cylinder and the reservoir and a self-pumping mechanism provided between the cylinder and an oil tank to effect feeding and discharge of the hydraulic fluid between the oil tank and the cylinder by extension and contraction of a piston rod, to thereby control a length of extension of the piston rod. The cylinder is connected to a pressure accumulating mechanism having a pressure accumulating tank and a switching valve mechanism. The switching valve mechanism is adapted to be switched to accumulate a pressure in the pressure accumulating tank or apply a pressure accumulated in the pressure accumulating tank to the cylinder. By applying the pressure in the pressure accumulating tank to the cylinder, the vehicle height can be increased before running of the vehicle, so that a satisfactorily large road clearance can be ensured before running of the vehicle.

REFERENCES:
patent: 5342023 (1994-08-01), Kuriki et al.
patent: 5586781 (1996-12-01), Anderson
patent: 5797594 (1998-08-01), Sekine et al.
English Language abstract of Japanese Patent Publication No. 07174181 A, published Jul. 11, 1995.

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