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Diaphragm pump method and apparatus

  • US 3,900,276 A
  • Filed: 05/16/1973
  • Issued: 08/19/1975
  • Est. Priority Date: 05/16/1973
  • Status: Expired due to Term
First Claim
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1. In a diaphragm pump including, a frame means;

  • a motor connected to said frame means;

    a connecting rod eccentrically mounted at one end thereof to a drive shaft of said motor;

    fluid housing means mounted upon said frame means, including a fluid entry port, and a fluid exit port; and

    flexible pump diaphragm means affixed to said connecting rod at the other end thereof and intercalated between said frame means and said fluid housing means;

    the improvement comprising;

    a first cylindrical tubular wall means coaxially positioned within said housing means for defining, an inlet chamber within said tubular wall means, and an outlet chamber exterior of said tubular wall and interior of said fluid housing means, said outlet chamber circumferentially extending about said tubular wall means;

    a cylindrical sleeve of volumetrically compressible material positioned within said inlet chamber about and disposed in full contact with said first tubular wall means for attenuating fluid pulsations within said inlet chamber;

    a second cylindrical wall concentrically extending radially outwardly of said tubular wall means to define a concentrically annular fluid outlet chamber;

    a cylindrical sleeve of volumetrically compressible material positioned within said outlet chamber contiguously extending about said second cylindrical wall for attenuating fluid pulsations within said outlet chamber;

    conduit means extending between and placing in fluid communication said inlet port and said inlet chamber;

    valve plate means mounted between said diaphragm and one end of said coaxial tubular wall means and defining a pumpinG chamber coaxially extending above said inlet chamber and said outlet chamber, said valve plate having a plurality of inlet ports communicating between said inlet chamber and said pumping chamber, and a plurality of outlet ports communicating between said pumping chamber and said outlet chamber;

    first valve means operably covering said inlet ports for permitting fluid to flow from said inlet chamber into said pumping chamber but preventing fluid from flowing from said pumping chamber into said inlet chamber;

    second valve means operably covering said outlet ports for permitting fluid to flow from said pumping chamber into said outlet chamber but preventing fluid from flowing from said outlet chamber into said pumping chamber, whereby upon actuation of said motor said eccentric mounted connecting rod will serve to reciprocate said diaphragm coaxially with said inlet chamber to draw fluid through said conduit means into said inlet chamber, past said first valve means into said pumping chamber, and force fluid from said pumping chamber past said second valve means into said circumferential outlet chamber and out said exit port.

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