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Variable resistance cell

  • US 6,875,241 B2
  • Filed: 02/05/2003
  • Issued: 04/05/2005
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Term
First Claim
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1. A variable resistance cell device configured to provide a variable resistance response to a load factor, the device comprising:

  • a) an enclosure with first and second chambers;

    b) an orifice, operatively disposed between the first and second chambers, and sized to provide resistance against fluid flow therethrough;

    c) a variable viscosity fluid, disposed in the enclosure and displacable between the first and second chambers though the orifice in response to the load factor; and

    d) the variable viscosity fluid having a viscosity that is variable corresponding to the load factor to vary an ability of the variable viscosity fluid to flow through the orifice; and

    e) the enclosure being compressible between;

    1) a first position in response to a relatively larger load factor having a first larger dimension and in which a lesser amount of the variable viscosity fluid passes through the orifice into the second chamber; and

    2) a second position in response to a relatively smaller load factor having a second smaller dimension and in which a greater amount of the variable viscosity fluid passes through the orifice into the second chamber;

    f) a block, disposed in the enclosure, dividing the enclosure into the first and second chambers and forming the orifice between the block and the enclosure; and

    g) a cup, formed around the first chamber, to receive the block therein in the second position.

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