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Channel switching apparatus

  • US 6,530,907 B1
  • Filed: 12/28/2000
  • Issued: 03/11/2003
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Term
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First Claim
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1. A channel switching apparatus comprising:

  • a body frame including a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, and an eighth channel and a ninth channel diverging from said fourth channel;

    first channel switching means for switching a first main channel formed by coupling said first channel and said second channel with each other and a second main channel formed by coupling said first channel and said third channel with each other;

    second channel switching means for switching a third main channel formed by coupling said second channel and said fourth channel with each other and a fourth main channel formed by coupling said second channel and said fifth channel with each other;

    third channel switching means for switching a fifth main channel formed by coupling said fourth channel and said sixth channel with each other and a sixth main channel formed by coupling said sixth channel and said ninth channel with each other; and

    fourth channel switching means for switching a seventh main channel formed by coupling said seventh channel and said ninth channel with each other and an eighth main channel formed by coupling said eighth channel and said ninth channel with each other, wherein said first channel switching means has;

    first switching means provided on an intersection point between said first channel, said second channel and said third channel and having a first coupling channel for coupling said first channel and said second channel with each other on a first position and a second coupling channel for coupling said first channel and said third channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said first main channel and said second main channel, and first urging means for urging said first switching means so that said first switching means is urged to be located on said first position in a general state and said first switching means is located on said second position only when moved against urging force, said second channel switching means has;

    second switching means provided on an intersection point between said second channel, said fourth channel and said fifth channel and having a third coupling channel for coupling said second channel and said fourth channel with each other on a first position and a fourth coupling channel for coupling said second channel and said fifth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said third main channel and said fourth main channel, and second urging means for urging said second switching means so that said second switching means is urged to be located on said first position in a general state and said second switching means is located on said second position only when moved against urging force, said third channel switching means has;

    third switching means provided on an intersection point between said fourth channel, said sixth channel and said ninth channel and having a fifth coupling channel for coupling said sixth channel and said ninth channel with each other on a first position and a sixth coupling channel for coupling said sixth channel and said fourth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said fifth main channel and said sixth main channel, and third urging means for urging said third switching means so that said third switching means is urged to be located on said first position in a general state and said third switching means is located on said second position only when moved against urging force, and said fourth channel switching means has;

    fourth switching means provided on an intersection point between said seventh channel, said eighth channel and said ninth channel for sliding between a first position and a second position in a plane including said seventh main channel and said eighth main channel thereby coupling said seventh channel and said ninth channel with each other on said first position and coupling said ninth channel and said eighth channel with each other on said second position, and fourth urging means for urging said fourth switching means so that said fourth switching means is urged to be located on said first position in a general state and said fourth switching means is located on said second position against urging force only when the flow rate in said eighth channel exceeds a prescribed value.

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