Self-pumping hydropneumatic suspension strut

Details Self-pumping hydropneumatic suspension strut Self-pumping hydropneumatic suspension strut

2006-04-04

2006-04-04

Kramer, Devon C. (Department: 3683)

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

C188S301000, C188S315000, C188S322210, C267S064170, C267SDIG003

Reexamination Certificate

active

07021434

ABSTRACT:
Self-pumping hydropneumatic suspension strut with internal height control, in particular for motor vehicles with a work cylinder which is filled with oil and is under pressure by at least one gas cushion which is arranged in a high-pressure chamber and which acts as a spring, the work cylinder being divided into two work spaces by a work piston supported by a hollow piston rod, with a piston pump which is driven by the spring movements and conveys oil out of a low-pressure chamber into the work space connected to the high-pressure chamber and connects the work space connected to the high-pressure chamber to the low-pressure chamber by a regulating opening which is closable depending on the position of the work piston in the work cylinder, wherein a flow connection running through an intermediate wall and opening out below the surface of the oil is provided between the pump space and the low-pressure chamber, wherein the flow connection is arranged in the intermediate wall and has at least one bore hole in the area of the low-pressure chamber for receiving a suction tube.

REFERENCES:
patent: 4368878 (1983-01-01), Meller et al.
patent: 4469010 (1984-09-01), Skover et al.
patent: 4502672 (1985-03-01), Meller et al.
patent: 5797594 (1998-08-01), Sekine et al.
patent: 2002/0030311 (2002-03-01), Beck et al.
patent: 2002/0105118 (2002-08-01), Beck

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