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Title: US4877983: Magnetic force generating method and apparatus
[ Derwent Title ]


Country: US United States of America

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7 pages

 
Inventor: Johnson, Howard R.; Blacksburg, VA 24060

Assignee: None

Published / Filed: 1989-10-31 / 1985-11-19

Application Number: US1985000799618

IPC Code: Advanced: H02K 53/00;
Core: more...
IPC-7: H02K 41/00;

U.S. Class: Current: 310/012.24; 310/012.07; 310/012.26; 310/152;
Original: 310/012; 310/152;

Field of Search: 310/152,12,46

Priority Number:
1985-11-19  US1985000799618

Abstract: A permanent magnet armature is magnetically propelled along a guided path by interaction with the field within a flux zone limited on either side of the path by an arrangement of permanent stator magnets.

Attorney, Agent or Firm: Fleit, Jacobson, Cohn, Price, Holman & Stern ;

Primary / Asst. Examiners: Skudy, R.;

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First Claim:
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What is claimed as new is as follows:     1. In combination with a movable armature, means for guiding movement of the armature along a predetermined path and a permanent armature magnet having magnetic poles of opposite polarity spaced from each other along said path to establish a magnetic field of limited extent movable with the armature and magnetic stator means for establishing a stationary magnetic flux zone along said path, the improvement comprising flux emitting surfaces of one polarity mounted on the stator means on opposite sides of said path for limiting said flux zone through which said path extends and means mounting the permanent armature magnet on the armature with the poles thereof orientated relative to said flux emitting surfaces on the stator means for unidirectionally propelling the armature along said path through the limited zone in response to magnetic interaction between the movable magnetic field and the limited flux zone, said magnetic stator means including a plurality of magnetic gate assemblies fixedly spaced from each other along said path and respectively establishing stationary magnetic fields, each of said gate assemblies including a plurality of interconnected bar magnets substantially bordering said limited flux zone exposing pole faces of opposite polarity in parallel spaced planes intersected by said path, and magnetic means connected to said interconnected bar magnets exposing one of the flux emitting surfaces of said one polarity perpendicular to said parallel planes for magnetic interaction of the stationary magnetic fields.

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Forward References: Show 11 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (11)   |   Backward references (2)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 6pp US4074153  1978-02 Baker et al.   Magnetic propulsion device
Get PDF - 11pp US4151431  1979-04 Johnson   Permanent magnet motor
       
Foreign References: None

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