A one-way valve and a flexible package including the valve are disclosed. The valve basically comprises a base member, a flexible septum and a stake. The base member is mounted on a wall of the package and includes a valve seat and at least one inlet port. The septum is formed of a resilient materia
A one-way valve and a flexible package including the valve are disclosed. The valve basically comprises a base member, a flexible septum and a stake. The base member is mounted on a wall of the package and includes a valve seat and at least one inlet port. The septum is formed of a resilient material and is connected to the base member by the stake, with a first portion of the septum contiguous with the stake fixed in position with respect to the base member and a second portion of the septum engaging the valve seat and covering and sealing the at least one inlet port. The septum is arranged to flex off of the valve seat to unseal the at least one inlet port when the pressure of gas at the at least one inlet port reaches a threshold.
대표청구항▼
1. A one-way valve for use on package having an interior for holding a material therein, the package having at least one wall panel bounding an interior in which the material is located, said valve comprising a base member, a cover member, a septum, a viscous fluid and a stake, said base member comp
1. A one-way valve for use on package having an interior for holding a material therein, the package having at least one wall panel bounding an interior in which the material is located, said valve comprising a base member, a cover member, a septum, a viscous fluid and a stake, said base member comprising a side wall and a valve seat, said side wall having an end surface, said cover member comprising a puncturable film secured to said end surface and forming an interior space which is isolated from the ambient surroundings and in which said valve seat and said septum are located, said valve being arranged to be secured to the at least one wall panel of the package with said cover member interposed therebetween, the wall of the package being arranged to be punctured, whereupon said cover member is punctured to form an outlet for said valve, said valve seat having a planar surface and at least one inlet port in fluid communication with said planar surface, said septum having an unflexed state in which said septum is a planar member having first planar central portion and a second planar portion surrounding said first planar central portion, said septum being formed of a flexible material, said stake projecting upward from said planar surface of said valve seat within said internal space and connecting said first planar central portion of said septum to said base member whereupon said first planar central portion of said septum contiguous with said stake is fixed in position with respect to said base member and said second planar portion of said septum engages said planar valve seat with said viscous fluid interposed between said second planar portion of said septum and said valve seat and covers and seals said at least one inlet port, said viscous fluid forming a releasably securable bond holding said septum in engagement with said valve seat, said septum being arranged so that said second planar portion of said septum is able to flex when the pressure of gas at said at least one inlet port reaches a threshold to overcome said releasably securable bond to cause said second portion of said septum to move away from said valve seat and open said at least one inlet port to allow the gas to enter into said interior of said valve and exit through the outlet, said second portion of said septum being arranged to automatically flex back onto said valve seat with said viscous fluid interposed therebetween to seal said at least one inlet port when the pressure of gas at said at least one inlet port drops below said threshold. 2. The one-way valve of claim 1 wherein said stake forms a portion of said base member and said septum includes a mounting aperture, said stake extending through said mounting aperture. 3. The one-way valve of claim 2 wherein said septum is held on said stake by secure frictional engagement between said first portion of said septum contiguous with said mounting aperture and a portion of said stake. 4. The one-way valve of claim 2 wherein said first portion of said septum is stretchable to enable said stake to be inserted therethrough. 5. The one-way valve of claim 1 additionally comprising a filter sheet located contiguous with said base member and extending over said at least one inlet port. 6. The one-way valve of claim 1 wherein said septum is formed of a thermoplastic vulcanizate. 7. The one-way valve of claim 6 wherein said stake forms a portion of said base member and said septum includes a mounting aperture, and wherein said stake projects into said interior space and extends through said mounting aperture. 8. The one-way valve of claim 7 wherein said base member is molded as an integral unit. 9. The one-way valve of claim 1 wherein said base member comprises a generally concave, conical surface forming said valve seat and wherein said at least one inlet port is located in said concave, conical surface. 10. The one way valve of claim 9 additionally comprising a viscous fluid located at an interface of said valve seat and said septum and an annular ridge on said base member for holding said viscous fluid on said valve seat. 11. The one way valve of claim 9 additionally comprising a viscous fluid located at an interface of said valve seat and said septum and an annular groove on said base member for holding said viscous fluid on said valve seat. 12. The one-way valve of claim 1 wherein said stake forms a portion of said septum and wherein said base includes an opening into which a portion of said stake extends. 13. The one-way valve of claim 12 wherein said septum is of a convex shape. 14. The one-way valve of claim 1 wherein said septum has a modulus of elasticity of at least 0.2 Kpsi. 15. A package having an interior for holding a material therein, said package comprising at least one wall panel bounding an interior in which the material is located and a one-way valve, said one-way valve comprising a base member, a cover member, a septum, a viscous fluid and a stake, said base member comprising a side wall and a valve seat, said side wall having an end surface, said cover member comprising a puncturable film secured to said end surface and forming an interior space which is isolated from the ambient surroundings and in which said valve seat and said septum are located, said valve being arranged to be secured to said at least one wall panel of the package with said cover member interposed therebetween, said wall of said package being arranged to be punctured, whereupon said cover member is punctured to form an outlet for said valve, said valve seat having a planar surface and at least one inlet port in fluid communication with said planar surface, said septum having an unflexed state in which said septum is a planar member having first planar central portion and a second planar portion surrounding said first planar central portion, said septum being formed of a flexible material, said stake projecting upward from said planar surface of said valve seat within said internal space and connecting said first planar central portion of said septum to said base member, whereupon said first planar central portion of said septum contiguous with said stake is fixed in position with respect to said base member and said second planar portion of said septum engages said planar valve seat with said viscous fluid interposed between said second planar portion of said septum and said valve seat and covers and seals said at least one inlet port, said viscous fluid forming a releasably securable bond holding said septum in engagement with said valve seat, said septum being arranged so that said second planar portion of said septum is able to flex when the pressure of gas at said at least one inlet port reaches a threshold to overcome said releasably securable bond to cause said second portion of said septum to move away from said valve seat and open said at least one inlet port to allow the gas to enter into said interior of said valve and exit through the outlet, said second portion of said septum being arranged to automatically flex back onto said valve seat with said viscous fluid interposed therebetween to seal said at least one inlet port when the pressure of gas at said at least one inlet port drops below said threshold. 16. The package of claim 15 wherein said stake forms a portion of said base member and said septum includes a mounting aperture, said stake extending through said mounting aperture. 17. The package of claim 16 wherein said septum is held on said stake by secure frictional engagement between said first portion of said septum contiguous with said mounting aperture and a portion of said stake. 18. The package of claim 16 wherein said first portion of said septum is stretchable to enable said stake to be inserted therethrough. 19. The package of claim 16 wherein said stake includes a free end, said free end being of a greater size than the size of said mounting aperture. 20. The package of claim 15 additionally comprising a filter sheet located contiguous with said base member and extending over said at least one inlet port. 21. The package valve of claim 15 wherein said septum is formed of a thermoplastic vulcanizate. 22. The package of claim 15 wherein said stake forms a portion of said base member and said septum includes a mounting aperture, and wherein said stake projects into said interior space and extends through said mounting aperture. 23. The package of claim 22 wherein said base member is molded as an integral unit. 24. The package of claim 15 wherein said base member comprises a generally concave, conical surface forming said valve seat and wherein said at least one inlet port is located in said concave, conical surface. 25. The package of claim 24 additionally comprising a viscous fluid located at an interface of said valve seat and said septum and an annular ridge on said base member for holding said viscous fluid on said valve seat. 26. The package of claim 24 additionally comprising a viscous fluid located at an interface of said valve seat and said septum and an annular groove on said base member for holding said viscous fluid on said valve seat. 27. The package of claim 15 wherein said stake forms a portion of said septum and wherein said base member includes an opening into which a portion of said stake extends. 28. The package of claim 27 wherein said septum is of a convex shape. 29. The package of claim 15 wherein said septum has a modulus of elasticity of at least 0.2 Kpsi.
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이 특허에 인용된 특허 (11)
Tsai Hsien-tang,TWX, Aquarium pump having silencing effect.
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