Sealed valve and control means therefor
First Claim
Patent Images
1. A sealed valve, comprising:
- a valve body having a flow path connecting an inlet and an outlet, the entire valve body being sealed from the entire atmosphere;
a movable valve member in the valve body adapted to be moved between open and closed positions;
a disc in the valve body spaced from the valve member and mounted for rotation;
polyphase electrical supply means external of the valve body for inducing a current in the disc, thereby creating torque in the disc and causing the disc to rotate;
means connecting the disc to the valve member whereby rotation of the disc causes movement of the valve member;
means for detecting the rotative position of the disc; and
means for deenergizing the electrical supply means when the disc reaches a predetermined rotative position.
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Accused Products
Abstract
A sealed valve body housing a rotary valve rotated by a spindle. The spindle is connected to a disc mounted in a chamber in the valve body adjacent a valve body wall. Polyphase drive coils on the valve body wall induce a current in the disc, causing it to rotate. A pulse sensor mounted on the valve body detects the rotative position of the disc and a counter signals the power source to stop movement of the valve. The periphery of the disc is notched to permit the pulses to pass through the rotating disc and be counted. The torque of the disc can be increased through use of more sets of coils, more discs or gears interconnecting the spindle and the rotary valve.
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Citations
19 Claims
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1. A sealed valve, comprising:
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a valve body having a flow path connecting an inlet and an outlet, the entire valve body being sealed from the entire atmosphere; a movable valve member in the valve body adapted to be moved between open and closed positions; a disc in the valve body spaced from the valve member and mounted for rotation; polyphase electrical supply means external of the valve body for inducing a current in the disc, thereby creating torque in the disc and causing the disc to rotate; means connecting the disc to the valve member whereby rotation of the disc causes movement of the valve member; means for detecting the rotative position of the disc; and means for deenergizing the electrical supply means when the disc reaches a predetermined rotative position. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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2. A sealed valve, comprising:
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a valve body having a flow path connecting an inlet and an outlet, the valve body being sealed form the atmosphere; a movable valve member in the valve body adapted to be moved between open and closed positions; a disc in the valve body spaced from the valve member and mounted for rotation; polyphase electrical supply means external of the valve body for inducing a current in the disc, thereby creating torque in the disc and causing the disc to rotate; means connecting the disc to the valve member whereby rotation of the disc causes movement of the valve member; means for detecting the rotative position of the disc, said detecting means comprising a plurality of uniformly spaced portions in the disc which permit passage therethrough of energy from a sensing device; and means for deenergizing the electrical supply means when the disc reaches a predetermined rotative position. - View Dependent Claims (3, 4, 5, 15)
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16. A method of moving and positioning a movable valve member positioned within a valve body which is entirely sealed from the atmosphere, comprising the steps of:
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rotating a disc positioned entirely within the sealed valve body and connected to the valve member by inducing a current in the disc from a polyphase electrical supply means located externally of the valve body; determining the position of the valve member by detecting the rotative position of the disc; and deenergizing the electrical supply means when the disc reaches a predetermined rotative position. - View Dependent Claims (17)
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18. A method of moving and positioning a movable valve member in a sealed valve body, comprising the steps of:
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rotating a disc connected to the valve member by inducing a current in the disc from a polyphase electrical supply means located externally of the valve body; detecting the rotative position of the disc and thereby determining the position of the valve member by providing a plurality of uniformly spaced openings in the periphery of the disc, sending energy through the openings and detecting the pulses of energy passing through the openings with pulse sensing means; and deenergizing the electrical supply means when the disc reaches a predetermined rotative position. - View Dependent Claims (19)
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Specification