×

Spray gun with improved needle shut-off valve sealing arrangement

  • US 6,776,360 B2
  • Filed: 06/26/2001
  • Issued: 08/17/2004
  • Est. Priority Date: 06/26/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A spray device comprising a main body having a liquid passage for connection to a source of pressurized liquid to be sprayed, a spray nozzle affixed to said main body for directing liquid from said liquid passage in a predetermined spray pattern, a valve needle having a seating end portion and being selectively movable longitudinally in said body between a retracted open position for permitting liquid discharge through said nozzle and a closed position for preventing liquid discharge from said nozzle, said nozzle including an orifice body member which defines a liquid discharge orifice and a rigid valve seat in spaced upstream relation to said liquid discharge orifice for centering and precisely locating the seating portion of said valve needle when in a closed position, and a resilient O-ring sealing member mounted in longitudinally fixed relation within said orifice body member upstream of said rigid valve seat and having a circular cross section for resiliently engaging and creating a liquid seal about said valve needle seating portion when said valve needle is moved relative to said sealing member to a closed position.

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