Ultra precision pressure regulator
First Claim
Patent Images
1. An electromagnet comprising:
- an armature of magnetic material having an inner pole piece disposed between two outer pole pieces;
permanent magnet means fixed to said inner pole piece and movable relative thereto;
means forming an orifice in one of said outer pole pieces disposed opposite a pole of said permanent magnet means at a distance such that said magnet is normally attracted to said one outer pole piece for holding said permanent magnet means against said orifice;
adjustable means associated with the other of said outer pole pieces for controlling the magnetic force at which said permanent magnet means is held against said orifice.
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Accused Products
Abstract
A valve actuator for use in a pressure regulator. It comprises an electromagnetic having a plurality of pole pieces. A valve actuating permanent magnet is moveably secured to one of the pole pieces. The pole pieces are so disposed relative to each other that four distinct magnetic forces combine to urge the permanent magnet in a first or second direction depending on the polarity of current applied to a coil disposed about one of said pole pieces.
11 Citations
8 Claims
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1. An electromagnet comprising:
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an armature of magnetic material having an inner pole piece disposed between two outer pole pieces; permanent magnet means fixed to said inner pole piece and movable relative thereto; means forming an orifice in one of said outer pole pieces disposed opposite a pole of said permanent magnet means at a distance such that said magnet is normally attracted to said one outer pole piece for holding said permanent magnet means against said orifice; adjustable means associated with the other of said outer pole pieces for controlling the magnetic force at which said permanent magnet means is held against said orifice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification