Selective mode handwheel valve operator

Details Selective mode handwheel valve operator Selective mode handwheel valve operator

1977-03-14

1978-06-06

Yost, Frank T.

Machine element or mechanism

Alternate manual or power operators

251 14, F16K 3105

Patent

active

040928772

ABSTRACT:
The disclosure is of a selective-mode valve operator comprising a handwheel adapted to be mounted on a valve body with an output sleeve keyed onto the input shaft or stem of the valve. A motor may be mounted directly onto the handwheel, and locking means selectively lock the handwheel to the output sleeve or to a stationary member. When the handwheel is locked to the output sleeve, shift means prevent motor operation, and when it is locked against rotation the shift means enable motor operation. The shift means pass through a neutral condition whereby one mode is inactivated before the other mode is activated.

REFERENCES:
patent: 2861473 (1958-11-01), Allman et al.
patent: 3217604 (1965-11-01), Knox
patent: 3309942 (1967-03-01), Caldwell

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