Abstract A first invention is concerned with an electromagnetic actuator comprising: a closed magnetic path formed by a fixed magnetic piece, a moving magnetic piece, and gaps defined by said fixed magnetic piece and said moving magnetic piece that come into contact with each other and move away from each other; an electric winding for exciting said closed magnetic path; and a permanent magnet which bridges a pair or opposing sections of said fixed piece in said closed magnetic path to apply a magnetomotive force. A second invention is concerned with an electromagnetic actuator comprising: a closed magnetic path formed by a fixed magnetic piece of the form of a closed loop; an electric winding for exciting said closed magnetic path; and a moving piece consisting of a permanent magnet which bridges a pair of opposing sections of said closed magnetic path via gaps to apply a magnetomotive force.
An electromagnetic actuator comprising a closed magnetic circuit consisting of a magnetic stationary member, a magnetic movable member and gaps defined between them; an electric coil for energizing the closed magnetic circuit; and a permanent magnet bridgingly disposed between a pair of restricted sections, facing each other, of the stationary memebr so as to apply magnetomotive force to the closed magnetic circuit.
Claim 2
Dependent Claim
62 words
An electromagnetic actuator comprising a closed magnetic circuit consisting of a magnetic stationary member, a magnetic movable member and gaps defined between them; an electric coil for energizing the closed magnetic circuit; and a permanent magnet bridgingly disposed between a pair of restricted sections, facing each other, of the stationary memebr so as to apply magnetomotive force to the closed magnetic circuit.
Claim 3
Dependent Claim
69 words
An electromagnetic actuator comprising a closed magnetic circuit consisting of a magnetic stationary member in a closed loop shape; an electric coil for energizing the closed magnetic circuit; and a movable member made of a permanent magnet, which member is bridgingly connected between a pair of restricted sections, facing each other, of the closed magnetic circuit through gaps so as to apply magnetomotive force to the closed magnetic circuit.
Claim 4
Dependent Claim
69 words
An electromagnetic actuator comprising a closed magnetic circuit consisting of a magnetic stationary member in a closed loop shape; an electric coil for energizing the closed magnetic circuit; and a movable member made of a permanent magnet, which member is bridgingly connected between a pair of restricted sections, facing each other, of the closed magnetic circuit through gaps so as to apply magnetomotive force to the closed magnetic circuit.
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