Non-slamming check valve
First Claim
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1. A check valve comprising:
- a sealing device comprising a sealing plate, a guide shaft, and a dampening shaft, said guide shaft extending from a first surface of said sealing plate and said dampening shaft extending from a second surface of said sealing plate wherein said second surface is opposite said first surface;
a guide plate adapted to be positioned within a fluid-carrying conduit, said guide plate having one or more through-passages for allowing a flow of fluid through said guide plate, and a guide aperture for guiding the reciprocating movement of said guide shaft;
a valve plate adapted to be positioned within a fluid-carrying conduit, said valve plate having one or more through-passages for allowing a flow of fluid through said valve plate, and a seat surrounding said one or more through-passages in said valve plate and for contacting said second surface of said sealing device to prevent the flow of fluid through said one or more through-passages of said valve plate; and
a dampening chamber for receiving said dampening shaft;
wherein at least said dampening shaft includes a choke bore for allowing the escape of fluid from said dampening chamber, wherein said dampening shaft, said dampening chamber, and said choke bore are respectively dimensioned such that when said guide plate, said sealing device, said valve plate, and said dampening chamber are operably positioned within a fluid-carrying conduit, and said dampening shaft is forced into said dampening chamber, fluid within said dampening chamber becomes compressed and escapes said dampening chamber through said choke bore at a rate that is sufficiently slow to dampen the movement of said dampening shaft into said dampening chamber.
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Abstract
A check valve is provided for stopping the reverse flow of fluid through a fluid-carrying conduit and includes a fluid dampening device to dampen the closing movement of the valve upon flow reversal. The fluid dampening device includes a member for containing a fluid that becomes compressed upon a reverse flow of fluid through a conduit that houses the check valve. As the check valve is forced by a reverse fluid flow in a reverse direction, fluid in the fluid dampening device becomes compressed and is permitted to slowly seep out of the fluid dampening device via fluid passageways that permit only the slow escape of fluid from a compressed fluid chamber.
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Citations
21 Claims
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1. A check valve comprising:
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a sealing device comprising a sealing plate, a guide shaft, and a dampening shaft, said guide shaft extending from a first surface of said sealing plate and said dampening shaft extending from a second surface of said sealing plate wherein said second surface is opposite said first surface;
a guide plate adapted to be positioned within a fluid-carrying conduit, said guide plate having one or more through-passages for allowing a flow of fluid through said guide plate, and a guide aperture for guiding the reciprocating movement of said guide shaft;
a valve plate adapted to be positioned within a fluid-carrying conduit, said valve plate having one or more through-passages for allowing a flow of fluid through said valve plate, and a seat surrounding said one or more through-passages in said valve plate and for contacting said second surface of said sealing device to prevent the flow of fluid through said one or more through-passages of said valve plate; and
a dampening chamber for receiving said dampening shaft;
wherein at least said dampening shaft includes a choke bore for allowing the escape of fluid from said dampening chamber, wherein said dampening shaft, said dampening chamber, and said choke bore are respectively dimensioned such that when said guide plate, said sealing device, said valve plate, and said dampening chamber are operably positioned within a fluid-carrying conduit, and said dampening shaft is forced into said dampening chamber, fluid within said dampening chamber becomes compressed and escapes said dampening chamber through said choke bore at a rate that is sufficiently slow to dampen the movement of said dampening shaft into said dampening chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A check valve comprising:
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a sealing device comprising a sealing means, a guide shaft, and a dampening shaft, said sealing means adapted to seal one or more through-passages in a valve plate that allow the flow of fluid through the valve plate, said guide shaft extending from a first surface of said sealing means and adapted for reciprocating guided movement within a guide aperture of a guide plate, and said dampening shaft extending from a second surface of said sealing means wherein said second surface is opposite said first surface, said dampening shaft adapted for reciprocating movement within a dampening chamber;
a guide plate adapted to be positioned within a fluid-carrying conduit, said guide plate having one or more through-passages for allowing a flow of fluid through said guide plate, and a guide means for guiding the reciprocating movement of said guide shaft;
a valve plate adapted to be positioned within a fluid-carrying conduit, said valve plate having one or more through-passages for allowing a flow of fluid through said valve plate, and a seat means surrounding said one or more through-passages in said valve plate and for contacting said second surface of said sealing means to prevent the flow of fluid through said or more through-passages of said valve plate; and
a dampening means for receiving said dampening shaft, wherein at least one of said dampening shaft and said dampening means includes a choke bore for allowing the escape of fluid from said dampening means, wherein said dampening shaft, said dampening means, and said choke bore are respectively dimensioned such that when said guide plate, said sealing device, said valve plate, and said dampening means are operably positioned within a fluid-carrying conduit, and said dampening shaft is forced into said dampening means, fluid within said dampening means becomes compressed and escapes said dampening means through said choke bore at a rate that is sufficiently slow to dampen the movement of said dampening shaft into said dampening means. - View Dependent Claims (19)
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20. A method of dampening the closing movement of a sealing plate in a check valve in a fluid-carrying conduit, comprising:
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providing a sealing device comprising a sealing plate, a guide shaft, and a dampening shaft, said sealing plate adapted to seal one or more through-passages in a valve plate that allow the flow of fluid through the valve plate, said guide shaft extending from a first surface of said sealing plate and adapted for reciprocating guided movement within a guide aperture of a guide plate, and said dampening shaft extending from a second surface of said sealing plate wherein said second surface is opposite said first surface, said dampening shaft adapted for reciprocating movement within a dampening chamber;
providing a guide plate within said fluid-carrying conduit, said guide plate having one or more through-passages for allowing a flow of fluid through said guide plate, and a guide aperture for guiding the reciprocating motion of said guide shaft;
providing a valve plate positioned within said fluid-carrying conduit, said valve plate having one or more through-passages for allowing a flow of fluid through said valve plate, and a seat surrounding said one or more through-passages in said valve plate and for contacting said second surface of said sealing device to prevent the flow of fluid through said one or more through-passages of said valve plate;
providing a dampening chamber for receiving said dampening shaft, wherein at least one of said dampening shaft and said dampening chamber includes a choke bore for allowing the escape of fluid from said dampening chamber, wherein said dampening shaft, said dampening chamber, and said choke bore are respectively dimensioned such that when said dampening shaft is forced into said dampening chamber, the fluid within said dampening chamber becomes compressed and escapes said dampening chamber through said choke bore at a rate that is sufficiently slow to dampen the movement of said dampening shaft into said dampening chamber; and
causing a reverse flow of fluid through said fluid-carrying conduit, said reverse flow of fluid forcing said dampening shaft into said dampening chamber to compress fluid within said dampening chamber and cause said compressed fluid to escape said dampening chamber through said choke bore at a rate that is sufficiently slow to dampen the movement of said dampening shaft into said dampening chamber. - View Dependent Claims (21)
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Specification