Female screw member, motor operated valve using the same, and method for producing female screw member for motor operated valve
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United States of America Patent
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Mar 21, 2017
Grant Date -
Oct 30, 2014
app pub date -
Jul 7, 2014
filing date -
Jun 25, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A female screw member includes a female screw part with a female screw, and a projection part projecting in the direction of a center shaft of the female screw and having a working face in the rotating direction centering on the center shaft. The female screw part and projection part are integrally molded with a resin. The projection part has a spiral inclination face spirally inclining by one round from the working face centering on the center shaft of the female screw. The height H of the working face is equal to or smaller than a pitch P of the female screw. Using the projection part as a fully opening fixing stopper, a motor operated valve includes a valve main body having a valve seat, the female screw member attached to the valve main body, a motor having a rotator and stator, and a valve shaft. The valve shaft is screwed to a female screw of the female screw member, and is rotated and driven by the rotor, and has a fully opening movable stopper capable of contacting the fully opening fixing stopper.
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