Stop for rotational actuators

Details Stop for rotational actuators Stop for rotational actuators

1992-09-04

1993-11-09

Rivell, John

Valves and valve actuation

Limit stop

Adjustable

257286, F16K 508, F16K 5100

Patent

active

052595897

ABSTRACT:
An apparatus for limiting the rotational travel of a shaft of a valve actuator. A shaft engaging element having detents disposed therewith is connected to the shaft. A stop element is coupled to the actuator. When the shaft engaging element rotates with the shaft, the detents cooperate with the stop such that after a predetermined degree of rotational travel of the shaft the detents limit the travel of the shaft such that the resultant force balance of the shaft engaging element and thus the shaft is substantially zero.

REFERENCES:
patent: 1943865 (1934-01-01), Hennessey
patent: 3552434 (1971-01-01), Haenky
patent: 4064981 (1977-12-01), House et al.
patent: 4930611 (1990-01-01), Grimm
patent: 5014598 (1991-05-01), Champagne
patent: 5139230 (1992-08-01), Lester
Worcester Controls Series 39 Pneumatic Actuator (3 pages) Dec. 1989.

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