Positioning device

Details Positioning device Positioning device

1990-10-10

1992-03-24

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

With means for locking parts together temporarily

188299, 267 6411, 267 6415, A47B 910

Patent

active

050979280

ABSTRACT:
According to an illustrative example of the present invention a hydropneumatic positioning device comprises a tubular container. A hollow piston rod is guided through one end of the tubular container. A piston is connected with the piston rod within a cavity of the tubular container. The piston divides the cavity into two working chambers. The working chambers contain a liquid. Adjacent one of the working chambers, namely the working chamber remote from the piston rod, a compensating chamber is provided. This compensating chamber contains a pressurized gas and is separated from the adjacent working chamber by a floating separating wall. A flow passage extends through the piston between the two working chambers. A valve is allocated to the flow passage. The valve can be opened by an actuating rod extending through an axial bore of the hollow piston rod. The actuating rod extends beyond an outer end of the piston rod. An actuating signal transformer is fastened to the outer end of the piston rod. The signal transformer is constructed as a hydraulic press with a liquid chamber, an input piston, and an output piston. The output piston acts onto the outer end of the actuating rod and the input piston can be actuated manually.

REFERENCES:
patent: 3930565 (1976-01-01), Scheben et al.
patent: 4245826 (1981-01-01), Wirges
patent: 4779851 (1988-10-01), Bauer et al.
patent: 4856762 (1989-10-01), Selzer
patent: 4989698 (1991-02-01), Dony

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