Spring strut unit for suspension systems of motor vehicles

Details Spring strut unit for suspension systems of motor vehicles Spring strut unit for suspension systems of motor vehicles

2008-04-29

2008-04-29

King, Bradley (Department: 3683)

Spring devices

Vehicle

Comprising compressible fluid

C188S315000

Reexamination Certificate

active

11064323

ABSTRACT:
Spring strut unit for suspension systems of motor vehicles with a fastening connection on the body side and another fastening connection on the wheel side; with a helical spring supported between the body and the wheel; and with a vibration damper installed between the body-side fastening connection and the wheel-side fastening connection. The vibration damper includes a working cylinder, a damping piston attached to a piston rod, damping valves installed in the damping piston, and a compensating space. The helical spring can be pretensioned by a ring-shaped cylinder, which can be actuated by a hydraulic medium. A pump rod is mounted in a permanent axial position in the working cylinder of the vibration damper and cooperates with a cavity in the piston rod to form a pump space. Axial movements of the piston rod cause damping medium to be conveyed through flow connections from one of the working spaces of the working cylinder via the pump space and through a flow connection of the pump rod into the ring-shaped cylinder.

REFERENCES:
patent: 3353813 (1967-11-01), Erdmann et al.
patent: 3628810 (1971-12-01), Ggaef
patent: 3936039 (1976-02-01), McKinnon
patent: 5009451 (1991-04-01), Hayashi et al.
patent: 5401053 (1995-03-01), Sahm et al.
patent: 5984286 (1999-11-01), Busch et al.
patent: 6676119 (2004-01-01), Becker et al.
patent: 2 164 417 (1986-03-01), None

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