Patent ID: 7992457
Filing Date: 2011-08-09
Classification: F16K,Y10T

Abstract:
1. An actuator device comprising: an actuator housing, a driving motor attached to said actuator housing, an actuator spindle, and an auxiliary frame having at least one spring; said driving motor having a motor spindle being displaceably engaged with said actuator spindle via a nut and said auxiliary frame, such that rotation of said motor produces linear movement of said nut, auxiliary frame and actuator spindle and said nut is releasable from said auxiliary frame to allow linear movement of said auxiliary frame while said nut remains in place relative to said motor spindle, in the event of a power failure; said auxiliary frame being arranged to displace said actuator spindle independently of said motor; and said at least one spring being arranged to bias said auxiliary frame while disengaged from said motor spindle.