Actuator assembly with rotational coupler in-line with...

Details Actuator assembly with rotational coupler in-line with... Actuator assembly with rotational coupler in-line with...

2007-02-28

2009-06-02

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

C251S063600, C251S305000

Reexamination Certificate

active

07540467

ABSTRACT:
An actuator assembly including an actuator housing assembly having a linear drive mechanism disposed at least partially therein. A linear variable differential transducer (LVDT) is coupled to the linear drive mechanism and configured to eliminate rotation of the linear drive mechanism and provide linear positioning of the linear drive mechanism. A valve shaft is coupled to the linear drive mechanism and in substantially linear alignment with the linear drive mechanism. A rotational coupler, in the form of a helical groove and reciprocating guide member, is formed to couple the linear drive mechanism to the valve shaft. The valve shaft is configured to allow for the linear displacement therein of the linear drive mechanism and thereby output a rotation moment via the rotational coupler to the valve shaft.

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patent: 6793194 (2004-09-01), Grinberg
patent: 7300035 (2007-11-01), Davis et al.

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