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Compressor pistons

  • US 6,557,454 B2
  • Filed: 06/11/2001
  • Issued: 05/06/2003
  • Est. Priority Date: 07/12/2000
  • Status: Expired due to Fees
First Claim
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1. A piston for use in a fluid displacement apparatus comprising:

  • a head portion having a cylindrical shape and a hollow structure;

    a connecting portion extending from an end surface of said head portion and coupling said piston with a moving source; and

    an aperture formed through said end surface of said head portion adjacent to said connecting portion, wherein a rib is formed adjacent to said aperture.

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