Self-pumping hydropneumatic spring strut with internal level reg

Details Self-pumping hydropneumatic spring strut with internal level reg Self-pumping hydropneumatic spring strut with internal level reg

1998-02-03

2000-03-07

Graham, Matthew C.

Spring devices

Vehicle

Comprising compressible fluid

267DIG2, 188289, 188314, B60G 1700

Patent

active

060329335

ABSTRACT:
A self-pumping hydropneumatic spring strut that continuously regulates the pressure in the low- and high-pressure work cavities of the work cylinder to control the height of the vehicle body during all vehicle operation situations. According to the present invention, a valve is provided between the high-pressure work cavity and the pump cylinder. The valve is movable axially within the pump cylinder and advantageously blocks a first nonreturn valve between the pump cylinder and the low-pressure work cavity when spring strut is caused to elongate, and unblocks this first nonreturn valve when the spring strut is caused to compress.

REFERENCES:
patent: 4577840 (1986-03-01), Meller et al.
patent: 5826863 (1998-10-01), Beck
patent: 5857665 (1999-01-01), Beck

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