Electrically operated servo actuator with automatic shut off

Details Electrically operated servo actuator with automatic shut off Electrically operated servo actuator with automatic shut off

1990-07-16

1991-10-01

Rosenthal, Arnold

Fluid handling

Processes

25112912, 310 68B, F16K 3104

Patent

active

050524240

ABSTRACT:
A two-position motorized servo actuator with automatic motor shut off at either position. The user remotely energized the motor with a two-position switch and the motor drives in rotation a floating lead screw journalled for both rotational and axial movement. A follower traverses the lead screw during rotation; and, a lever means moved by the follower is operative to perform a desired function, such as for example, open and close a valve. Upon the follower contacting a travel limit stop, the motor continues rotation of the lead screw which moves axially by threaded advancement in the follower, and the axial movement of lead screw is operative to toggle a switch and reverse the polarity of the power to the motor. If the motor is remotely energized, for reverse rotation by user movement of the two-position switch to its opposite position, the servo will operate to drive the follower to an opposite limit position.

REFERENCES:
patent: 2203233 (1940-06-01), Danish
patent: 4315174 (1982-02-01), Doerr
patent: 4715580 (1987-12-01), Mueller
patent: 4794314 (1988-12-01), Janv et al.

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