ADJUSTABLE FAIL-SAFE ROTARY SPRING OPERATOR WITH A RETAINING BAND

摘要

A rotary spring-return actuator operator is provided with a multi-slot shaft and a clock type spring retained by a retaining band which encircles the spring in such a manner as to insure that the potential energy within the spring is safely contained during all operations requiring disassembly of the actuator assembly, and wherein the retaining band facilitates the in-field reversal of the spring direction or the adjustment of the spring preload by securing the spring to one or more of the slots on the multi-slot shaft.

主权项

1. A rotary spring-return operator comprising:
a housing having a housing aperture; a cover plate having a cover plate aperture; a shaft capable of extending through the housing aperture and the cover plate aperture; a spring capable of being engaged to said shaft and capable of being received within the interior of said housing; and a retaining band adjacent the spring.