Actuating device

Details Actuating device Actuating device

2005-05-31

2005-05-31

Thompson, Kenn (Department: 3672)

Wells

With electrical means

Valve

C074S089380, C074S089370, C251S129120, C251S251000

Reexamination Certificate

active

06899171

ABSTRACT:
An actuator system for shifting a control device that is pressure-loaded in the direction opposite the shift direction. The actuator system comprises an actuator element capable of being axially moved in the shift direction within a system enclosure by a rotating spindle of an advance mechanism. The rotating spindle is connected to a rotating sleeve that is pivot-mounted in the system enclosure and surrounds the rotating spindle. The rotating sleeve is locked in position in the direction opposite the direction of advance rotation of the rotating spindle by a volute spring. The volute spring is associated with an emergency release unit for resetting the actuator element against the shift direction. The emergency release unit comprises a tensioning sleeve for the volute spring. The tensioning sleeve rotates between a tensioned and a relaxed position and is pressure-loaded in the direction of its relaxed position. The volute spring is releasably retained in the tensioning sleeve's tensioned position.

REFERENCES:
patent: 5195721 (1993-03-01), Akkerman
patent: 5983743 (1999-11-01), McGregor et al.
patent: 6446519 (2002-09-01), Biester
patent: 0 384 607 (1990-08-01), None
patent: 1 024 422 (2000-08-01), None
patent: 2 266 942 (1993-11-01), None
patent: WO 98/30816 (1998-07-01), None

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