×

PUMP PISTON ASSEMBLY WITH ACOUSTIC DAMPENING DEVICE

  • US 20130081536A1
  • Filed: 09/30/2011
  • Published: 04/04/2013
  • Est. Priority Date: 09/30/2011
  • Status: Abandoned Application
First Claim
Patent Images

1. A piston assembly, comprising:

  • a cylinder of a first material;

    at least one piston of a second material different from the first material slidably mounted for reciprocating motion in the cylinder, the piston being hollow and having an inner surface of a first diameter and an outer cylindrical surface of a second diameter;

    at least one liner sleeve mounted on one of said inner and outer surfaces of the piston and having a close tolerance fit to the diameter of the piston surface on which it is mounted, whereby the opposing surfaces of the liner sleeve and piston are in face to face engagement; and

    the liner sleeve being of an acoustic dampening material which has a lower acoustic frequency than the piston material.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×