Self-pumping hydropneumatic shock absorbing strut

Details Self-pumping hydropneumatic shock absorbing strut Self-pumping hydropneumatic shock absorbing strut

1990-04-30

1991-11-05

Oberleitner, Robert J.

Spring devices

Vehicle

Comprising compressible fluid

18832217, B60G 1700, F16F 936

Patent

active

050626167

ABSTRACT:
A self-pumping hydropneumatic shock absorbing strut for a vehicle with internal level regulation for adjustment toward a standard elevation of the vehicle body capable of operating on a standing vehicle without a separate extenal supply of energy. For this purpose, the working chamber of the shock absorbing strut is connected to a higher pressure reservoir which is mounted external to the working cylinder and has a flow passage to the working cylinder. The flow passage is provided with a check valve which can be released or opened when the elevation of the vehicle is significantly below the standard elevation. During the release or opening of the check valve, the flow passage is open to allow free flow in both directions. A pressure equilibrium between the higher pressure oil reservoir and a pressurized oil chamber normally connected to the working cylinder causes the adjustment toward the standard elevation.

REFERENCES:
patent: 3480269 (1969-11-01), Jewell et al.
patent: 3593978 (1971-07-01), Lohr
patent: 4105194 (1978-08-01), Smeltzer et al.
patent: 4469315 (1984-09-01), Nicholls et al.
patent: 4577840 (1986-03-01), Meller et al.
patent: 4650042 (1987-03-01), Knecht et al.
patent: 4700812 (1987-10-01), Moser
patent: 4723640 (1988-02-01), Beck
patent: 4749069 (1988-06-01), Knecht et al.
patent: 4749070 (1988-06-01), Moser et al.
patent: 4785920 (1988-11-01), Knecht et al.

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