Isolating device

Details Isolating device Isolating device

2005-12-27

2005-12-27

Walczak, David J. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

C251S227000, C251S249500, C251S268000

Reexamination Certificate

active

06978979

ABSTRACT:
Isolating device, in particular for an injection valve with a turning spindle, rotatably mounted in a device housing, actively connected to a drive device, for the variable displacement of an operating element for an isolation stop valve, connected to the turning spindle, by means of a gearbox unit. The aim of the invention is to improve said isolating device such that the above may be operated in a simple and controllable manner, whereby the control of the isolating device may be carried out from a remote position and in a secure manner. Said aim is achieved, whereby the drive device comprises at least two individually or synchronously operable electric motors and the gearbox unit comprises at least one in particular self-locking drive unit, said drive unit being connected to both electric motors for turning the turning spindle.

REFERENCES:
patent: 3324741 (1967-06-01), ANderson
patent: 4346728 (1982-08-01), Sulzer
patent: 6032924 (2000-03-01), Castle
patent: 6446660 (2002-09-01), Goni Usabiaga
patent: 1 199 088 (1965-08-01), None
patent: 3832304 (1990-03-01), None
patent: 199 09 712 (2000-09-01), None
patent: 1 390 757 (1965-02-01), None

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