Selector valve with magnetometric sensor
First Claim
Patent Images
1. A selector valve with a magnetometric sensor, said selector valve comprising:
- a casing having a plurality of ports and a valve hole into which said ports open;
a spool housed for sliding in said valve hole and having one end extending outside from said valve hole to switch flow paths;
end blocks configured to house a piston on opposite sides of said casing;
driving means for driving said spool;
a magnet mounted to a portion of said one end of said spool extending from said valve hole so as to move with said spool outside said valve hole;
a detecting block disposed between one end of said casing and one of said end blocks to surround the one end of the spool extending from the valve hole and the magnet mounted to the portion of the one end of the spool extending from the valve hole; and
at least one magnetometric sensor mounted to said detecting block so as to be able to detect magnetism from said magnet.
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Accused Products
Abstract
By causing an end portion of a spool to extend outside from a valve hole, mounting a magnet to the extending portion, disposing a detecting block between a casing and an end block to surround the magnet, and mounting a magnetometric sensor to the detecting block, necessity for processing for mounting the electromagnetic sensor to the casing is avoided.
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Citations
18 Claims
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1. A selector valve with a magnetometric sensor, said selector valve comprising:
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a casing having a plurality of ports and a valve hole into which said ports open;
a spool housed for sliding in said valve hole and having one end extending outside from said valve hole to switch flow paths;
end blocks configured to house a piston on opposite sides of said casing;
driving means for driving said spool;
a magnet mounted to a portion of said one end of said spool extending from said valve hole so as to move with said spool outside said valve hole;
a detecting block disposed between one end of said casing and one of said end blocks to surround the one end of the spool extending from the valve hole and the magnet mounted to the portion of the one end of the spool extending from the valve hole; and
at least one magnetometric sensor mounted to said detecting block so as to be able to detect magnetism from said magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A selector valve with a magnetometric sensor, the selector valve comprising:
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a casing having a plurality of ports and a valve hole into which the ports open;
a spool housed for sliding in the valve hole and having one end extending outside from the valve hole to switch flow paths;
end blocks on opposite sides of the casing;
driving means for driving the spool;
a magnet mounted to a portion of the one end of the spool extending from the valve hole so as to move with the spool outside the valve hole;
a detecting block disposed between one end of the casing and one of the end blocks so as to surround the magnet mounted to the spool; and
at least one magnetometric sensor mounted to the detecting block so as to be able to detect magnetism from the magnet, wherein the detecting block includes a first portion sandwiched between the casing and the end block to surround an area where the magnet moves and a second portion positioned along an outer face of the selector valve astride the first portion and the end block, a sensor mounting groove is formed in the second portion in parallel with an axis of the spool and astride the moving area of the magnet, and the magnetometric sensor is fitted in the sensor mounting groove. - View Dependent Claims (9, 10, 11)
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12. A selector valve, comprising:
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a casing having a plurality of ports and a valve hole into which the ports open;
a spool housed to slide in the valve hole and having one end extending outside from the valve hole to switch flow paths;
end blocks configured to house a piston on opposite sides of the casing;
driving means for driving the spool;
a magnet mounted to a portion of the one end of the spool extending from the valve hole to move with the spool outside the valve hole;
a detecting block disposed between one end of the casing and one of the end blocks to surround the one end of the spool extending from the valve hole and the magnet mounted to the portion of the one end of the spool extending from the valve hole; and
a magnetometric sensor mounted to the detecting block configured to detect magnetism from the magnet. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification