Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1978-03-31
1979-04-17
Schwadron, Martin P.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
74 8915, 744248VA, 251229, 251279, F16k 3700
Patent
active
041495616
ABSTRACT:
A valve actuator is provided for use in conjunction with a valve having a rotatable member the rotation of which actuates the valve in dependence on the direction of rotation. The valve actuator comprises a housing and a coupling member rotatably carried by the housing and coaxially attached to the valve rotatable member. An elongated threaded shaft is rotatably mounted within the housing so that the axis of the shaft is perpendicular to and spaced from the axis of the coupling member. A nut member threadably engages the threaded shaft and a link is pivotally secured at one end to the nut member and at its other end to a radially extending portion of the coupling member. The link prevents rotation of the nut member on the threaded shaft so that rotation of the shaft axially drives the nut member along the shaft. An axial displacement of the nut member along the shaft in turn rotates the valve rotatable member via the link and the coupling member.
REFERENCES:
patent: 2167321 (1939-07-01), Abercrombie
patent: 3063298 (1962-11-01), Elliott
patent: 3204920 (1965-09-01), Generke
patent: 3318171 (1967-05-01), Wilkinson et al.
patent: 3415275 (1968-12-01), Berggren
patent: 3452766 (1969-07-01), Fenster
patent: 3464669 (1969-09-01), Henrion
patent: 3575378 (1971-04-01), Fawkes
patent: 3877677 (1975-04-01), Daghe
patent: 4008877 (1977-02-01), Yasuoka et al.
patent: 4023432 (1977-05-01), Killian
Schwadron Martin P.
Walton G. L.
Westran Corporation
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