Jet hammer

  • US 9,038,744 B2
  • Filed: 06/08/2009
  • Issued: 05/26/2015
  • Est. Priority Date: 06/06/2008
  • Status: Active Grant
First Claim
Patent Images

1. An impact tool valve assembly, comprising:

  • a cap screw having an upper end and a lower end;

    a valve port having at least one peripheral bore allowing fluid passage therethrough, wherein said valve port is slidingly disposed in relation to said cap screw;

    an outer compression spring, and an inner compression spring slidably disposed within said outer compression spring; and

    said inner compression spring and said outer compression spring concentrically positioned around said cap screw in a slidable relation intermediate said valve port and said upper end of said cap screw.

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