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Reciprocating internal combustion engine

  • US 20040159291A1
  • Filed: 07/25/2003
  • Published: 08/19/2004
  • Est. Priority Date: 09/02/1997
  • Status: Active Grant
First Claim
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1. An internal combustion engine comprising:

  • (a) a housing;

    (b) a piston assembly disposed in the housing, wherein the piston assembly is substantially stationary relative to the housing;

    (c) a cylinder movably disposed within the housing; and

    (d) a combustion chamber disposed between the piston assembly and the cylinder.

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