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Rotary compressor having a roller mounted eccentrically in a cylindrical chamber of a rotatable cylinder

  • US 5,733,112 A
  • Filed: 04/22/1996
  • Issued: 03/31/1998
  • Est. Priority Date: 12/08/1993
  • Status: Expired due to Fees
First Claim
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1. A rotary compressor, comprising:

  • a rotary body having a cylindrical surface and axially spaced ends forming a cylindrical chamber, said body being rotatable about a stationary first axis coinciding with a longitudinal axis of said chamber;

    a cylindrical roller mounted in said chamber and rotatable about a stationary second axis arranged parallel and eccentrically relative to said first axis, an outer diameter of said roller being smaller than a diameter of said surface so that a space is formed between said roller and said surface;

    a stationary gas discharge outlet disposed adjacent one of said axially spaced ends;

    a stationary gas inlet opening disposed adjacent one of said axially spaced ends;

    at least one vane mounted in said body for radial movement toward and away from said roller and being yieldably biased against said roller, said vane cooperating with said surface and said roller to form in said space a pocket whose volume alternately expands and contracts during rotation of said body, said pocket communicating with said gas inlet opening during said volume expansion to draw-in gas for pressurization during an initial phase of said volume contraction, and communicating with said gas discharge opening during a subsequent phase of said volume contraction to discharge the pressurized gas; and

    drive means for rotating said body about said first axis for bringing said pocket successively into communication with said gas inlet opening and said gas discharge opening;

    wherein said gas discharge opening is positioned radially outside of said surface as said chamber is viewed in a direction parallel to said axes, said body including a gas discharge hole arranged adjacent respective ones of said vanes for communicating said pocket with said gas outlet opening.

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