Composite oil filter

  • US 4,751,901 A
  • Filed: 10/13/1987
  • Issued: 06/21/1988
  • Est. Priority Date: 10/13/1987
  • Status: Expired due to Term
First Claim
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1. An oil filter cartridge for an internal combustion engine comprises a container having an inlet connected to the oil circulating system of the engine to receive unfiltered engine oil under pressure from said engine, and an outlet connected back into said oil circulating system or said engine to discharge filtered and reconditioned engine oil back into said engine;

  • said container having a filter material to remove contaminents from said engine oil circulating through said filter material;

    said filter material being impregnated with specific controlled amounts of certain of the essential additive chemicals that are initially supplied in engine oil by oil manufacturers, to replace a given proportion of those chemicals that are predictably lost in normal engine use over a given period of time, and under given conditions.

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