×

METERING VALVE CONSTRUCTION

  • US 3,842,857 A
  • Filed: 04/06/1973
  • Issued: 10/22/1974
  • Est. Priority Date: 04/06/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. In a metering valve for disposition in a tubular section between inlet and outlet portions of said section, said valve comprising a sleeve defining an open end and an open side wall, a piston assembly reciprocally movable in said sleeve and having a first piston head adapted to close said open end to prevent flow through said valve, and an actuating means for shifting said piston assembly to displace said first piston head and thereby open communication between inlet and outlet portions of said valve, said piston assembly defining an internal passage and a second piston head at the end of said passage, said second piston head forming a movable wall of a chamber into which fluid from said passage is adapted to flow, and a separate valve in said internal passage adapted to be opened by said actuating means whereby fluid enters said chamber to shift said second piston head, a metering orifice associated with said second piston head, resilient and pressure means for imparting return movement to said piston assembly whereby the fluid in said chamber is slowly discharged through said orifice to accomplish gradual return of said first piston head to seated position, the improvement comprising a bearing means situated within said sleeve slideably disposed within the side wall thereof, said bearing means defining A cylindrical opening with said piston assembly being received within said opening for reciprocal movement relative to the bearing means, said bearing means serving as a support for said piston assembly and for said resilient means thereby maintaining alignment of the piston assembly relative to said sleeve, a portion of the side wall of said sleeve consisting of spaced-apart web members to provide an outlet opening in the side wall, said bearing means comprising at least one element having a tubular section defining said cylindrical opening, and an externally formed flange portion extending outwardly from said tubular section, said flange portion being disposed within said sleeve.

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