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Device for interrupting a material flow

  • US 5,158,262 A
  • Filed: 04/26/1991
  • Issued: 10/27/1992
  • Est. Priority Date: 12/03/1990
  • Status: Expired due to Fees
First Claim
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1. A device for interrupting material flow comprising:

  • (a) a housing,(b) a shutter being displaced between a first position and a second position,(c) mechanical spring means for moving said shutter between said first and second position, said mechanical spring means including at least one spring being elastically deformed by displacement of said shutter relative to said housing, wherein substantially equal amounts of mechanical energy are stored in said spring means during elastic deformation to said first position and to said second position,(d) permanent magnet means for holding said shutter relative to said housing in each of said first position and in said second position against a spring force of said spring means, said permanent magnet means being fastened to a rotating spindle, and(e) an electric field attenuation coil fastened to said housing, said permanent magnet means resting against stops of a magnetic yoke of said electric field attenuation coil in either said first position or in said second position.

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