Apparatus for hydraulic actuation of a hinged cover

Details Apparatus for hydraulic actuation of a hinged cover Apparatus for hydraulic actuation of a hinged cover

1997-04-21

1998-06-02

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

340626, 296107, 296117, 91494, 91530, G08B 2100

Patent

active

057606951

ABSTRACT:
An apparatus for hydraulic actuation of a hinged cover on a vehicle having a working cylinder such that work spaces within the cylinder are respectively connected, via check valves, to a reversible pressure source. The check valves respectively contain a reciprocal unclosing facility, and the work spaces are connected, via a pilot valve, in parallel to the check valves. Between the one of the work space and one of the check valves, an emergency valve guiding off to the tank is interposed and is shut off during normal operation of the apparatus to allow a safe emergency actuation of the hinged cover.

REFERENCES:
patent: 4533908 (1985-08-01), Fujikawa
patent: 5110175 (1992-05-01), Fischback
patent: 5335926 (1994-08-01), Stolle
patent: 5682807 (1997-11-01), Mentink

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