×

Check valve

  • US 4,842,015 A
  • Filed: 05/09/1988
  • Issued: 06/27/1989
  • Est. Priority Date: 09/24/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A check valve assembly to control a flow of a pressurized medium in a fluid pressure system, said check valve assembly comprising:

  • (a) a housing member having a cavity therein, said cavity being in fluid communication with a source of fluid pressure at an inlet side thereof and being in fluid communication with a consuming source of said fluid pressure at an outlet side thereof;

    (b) an inlet valve formed by a valve seat positioned within said cavity and a valve body positioned within said cavity in a position to sealingly engage said valve seat when said check valve is in a closed position;

    (c) a valve body guide means positioned within said cavity for guiding said valve body during an opening and closing of said check valve, said valve body being pressed against said guide means when said inlet valve is undergoing said opening and a force generated by said pressurized medium is greater than that exerted by said presssurized medium when said check valve is closed; and

    (d) a valve spring engageable with said valve body to prestress said valve body against said valve seat when said check valve is closed, said valve spring being positioned in relationship to said valve body in a manner such that a point of impact on said valve body by a deformation line of said valve spring in relationship to said force generated by said pressurized medium is offset.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×