Self-pumping hydropneumatic shock absorber

Details Self-pumping hydropneumatic shock absorber Self-pumping hydropneumatic shock absorber

2007-03-19

2011-10-25

King, Bradley (Department: 3657)

Spring devices

Vehicle

Comprising compressible fluid

C267SDIG003

Reexamination Certificate

active

08042791

ABSTRACT:
Self-pumping hydropneumatic shock absorber with internal level control, with an oil-filled working cylinder under the pressure of gas cushions and with a damping piston, which is attached to the end of a hollow piston rod and can slide back and forth in the working cylinder, the hollow space in the piston rod serving as the pump space of a pump rod attached to the working cylinder. Oil is drawn from a reservoir space when the piston rod travels outward and into the working space when the piston rod travels inward, and where a control opening is provided in the pump rod to compensate for pressure differences between the working spaces. At least one throttle acting as a function of pressure is provided in the pump space between the high-pressure gas cushion and the low-pressure gas cushion.

REFERENCES:
patent: 3391922 (1968-07-01), Axthammer
patent: 3593978 (1971-07-01), Lohr
patent: 4577840 (1986-03-01), Meller et al.
patent: 6234462 (2001-05-01), Beck et al.
patent: 2005/0189186 (2005-09-01), Beck et al.

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