Double flapper valve for a variable cam timing system
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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Abstract
An inlet check valve for controlling fluid from a supply into a variable cam timing phaser includes a double flapper check valve assembly with an open position and a closed position, which includes 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. In another embodiment, the stoppers are on a stopper piece separate from the housing.
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Citations
15 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An inlet check valve for controlling fluid from a supply into a variable cam timing phaser comprising:
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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; a flapper valve comprising at least two flexible flaps received within the housing; a stopper piece comprising two stopper wings aligned with the at least two flexible flaps; 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 stopper wings; 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 stopper wings, 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. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification