Pneumatic spring with integrated control valve

Details Pneumatic spring with integrated control valve Pneumatic spring with integrated control valve

2005-08-02

2005-08-02

Butler, Douglas C. (Department: 3683)

Spring devices

Vehicle

Comprising compressible fluid

C267S064210, C267S122000

Reexamination Certificate

active

06923433

ABSTRACT:
Pneumatic spring with at least one control valve inside the pneumatic spring with control positions for feeding, blocking, and discharging compressed air, which valve is actuated by a control element also installed inside the pneumatic valve. The control element acts on one of the two pneumatic spring assemblies which can move relative to each other, namely, either on the outer tube or on the roll tube, where the control element has a working length which is shorter than the stroke length of the pneumatic spring and is pretensioned by a first spring against one of the pneumatic spring assemblies which can move relative to each other. The control element is supported in a floating manner relative to the pneumatic spring assemblies, and a second spring, the force of which is directed against the first spring, co-determines the position of the control element.

REFERENCES:
patent: 3000624 (1961-09-01), Cislo
patent: 3372919 (1968-03-01), Jackson
patent: RE33696 (1991-09-01), Stevenson
patent: 5649692 (1997-07-01), Gilsdorf et al.
patent: 6332624 (2001-12-01), Gilsdorf et al.
patent: 2003/0137086 (2003-07-01), Gross et al.
patent: 1056488 (1959-10-01), None
patent: 44 06 607 (1995-09-01), None
patent: 010200553 (2003-07-01), None
patent: 001327538 (2003-07-01), None
Translation of submitted German Search Report.
Translation of submitted German 1056488.

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