Valves and valve actuation – Mechanical movement actuator – Screw
Patent
1989-10-18
1990-10-23
Rivell, John
Valves and valve actuation
Mechanical movement actuator
Screw
251264, 251273, 744248VA, F16K 3150
Patent
active
049646133
ABSTRACT:
In a gate valve, the valve member is connected to an operating stem which extends upwardly through an opening in the housing for connection to a hand wheel rotatably carried by a yoke through which a portion of the stem extends; rotation of the hand wheel is transferred to linear motion of the valve stem through a split pair of threaded nut members the upper one of which is rotatably engaged with the hand wheel and the lower one of which is rotatably carried in a bore of the support yoke through which a threaded portion of the stem extends; the upper and lower nut members are intergaged to prevent relative rotation therebetween and are of identical configuration.
REFERENCES:
patent: 646912 (1900-04-01), Lewis
patent: 675757 (1901-06-01), Schonheyder
patent: 923413 (1909-06-01), Davis
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patent: 1602443 (1926-10-01), Moyer
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patent: 2031151 (1936-02-01), Eulberg
patent: 2125942 (1938-08-01), McCarthy
patent: 2186833 (1940-01-01), Iler
patent: 2297137 (1942-01-01), Fennema
patent: 2996075 (1961-08-01), Deimer et al.
patent: 3190611 (1965-06-01), Prescott et al.
Mueller Co.
Rivell John
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