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Double flapper valve for a variable cam timing system

  • US 10,458,559 B2
  • Filed: 10/03/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 10/06/2016
  • Status: Active Grant
First Claim
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1. An inlet check valve for controlling fluid from a supply into a variable cam timing phaser comprising:

  • a double flapper check valve assembly with an open position and a closed position, the double flapper check valve comprising;

    a housing having a body forming at least two stoppers;

    a flapper valve comprising at least two flexible flaps received within the housing and aligned with the at least two stoppers; and

    a valve seat received within the housing, the valve seat defining openings aligned with the at least two flexible flaps, axially opposite the two stoppers;

    wherein when fluid flows through the openings of the valve seat, the fluid pushes the at least two flaps away from the valve seat and towards the at least two stoppers, permitting the flow of fluid into the variable cam timing phaser; and

    wherein when fluid flows from the body onto the at least two flaps, the fluid pushes the at least two flaps towards the valve seat, sealing the openings of the valve seat and preventing fluid from entering the supply.

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