PUMP ASSEMBLY INCLUDING FLUID CYLINDER AND TAPERED VALVE SEATS
First Claim
Patent Images
1. A pump assembly, comprising:
- a fluid cylinder having a first axis, the fluid cylinder comprising a first fluid passage through which fluid is adapted to flow along the first axis, the first fluid passage defining a first tapered internal shoulder of the fluid cylinder, the first tapered internal shoulder defining a first angle from the first axis; and
a first valve to control flow of fluid through the first fluid passage, the first valve comprising a first valve seat disposed in the first fluid passage, the first valve seat having a second axis that is aligned with the first axis, the first valve seat comprising a first tapered external shoulder, the first tapered external shoulder defining a second angle from the second axis;
wherein each of the first and second angles ranges from about 10 degrees to about 45 degrees measured from the first axis and the second axis aligned therewith.
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Abstract
According to one aspect, a pump assembly includes a fluid cylinder, the fluid cylinder including a fluid passage, the fluid passage defining a tapered internal shoulder of the fluid cylinder, the tapered internal shoulder defining a first angle. A valve controls flow of fluid through the fluid passage. The valve includes a valve seat, which is disposed in the fluid passage and includes a tapered external shoulder, the tapered external shoulder defining a second angle. In one embodiment, the first tapered external shoulder engages the first tapered internal shoulder to distribute and transfer loading.
42 Citations
37 Claims
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1. A pump assembly, comprising:
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a fluid cylinder having a first axis, the fluid cylinder comprising a first fluid passage through which fluid is adapted to flow along the first axis, the first fluid passage defining a first tapered internal shoulder of the fluid cylinder, the first tapered internal shoulder defining a first angle from the first axis; and a first valve to control flow of fluid through the first fluid passage, the first valve comprising a first valve seat disposed in the first fluid passage, the first valve seat having a second axis that is aligned with the first axis, the first valve seat comprising a first tapered external shoulder, the first tapered external shoulder defining a second angle from the second axis; wherein each of the first and second angles ranges from about 10 degrees to about 45 degrees measured from the first axis and the second axis aligned therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fluid cylinder for a pump assembly, the fluid cylinder having a fluid passage axis and comprising:
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a first fluid passage through which fluid is adapted to flow along the fluid passage axis, the first fluid passage defining a first tapered internal shoulder of the fluid cylinder, the first tapered internal shoulder defining a first angle from the fluid passage axis, the first angle ranging from about 10 degrees to about 45 degrees measured from the fluid passage axis; and a pressure chamber in fluid communication with the first fluid passage. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A valve seat adapted to be disposed within a fluid cylinder for a pump assembly, the valve seat having a valve seat axis and comprising:
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a seat body, the seat body comprising an enlarged-diameter portion at one end thereof, the enlarged-diameter portion comprising a first tapered external shoulder, the first tapered external shoulder defining a first angle from the valve seat axis, and a frusto-conical surface extending at the first angle from the valve seat axis, the first angle ranging from about 10 degrees to about 45 degrees measured from the valve seat axis, wherein the enlarged-diameter portion defines a first cylindrical surface extending axially from the frusto-conical surface, the first cylindrical surface defining a first outside diameter, wherein the seat body defines an outside surface, the outside surface defining a second outside diameter that is less than the first outside diameter, and wherein the frusto-conical surface is axially disposed between the outside surface and the first cylindrical surface; and a bore formed through the seat body and through which fluid flows along the valve seat axis, the bore defining a second cylindrical surface, the second cylindrical surface defining an inside diameter that is less than the second outside diameter. - View Dependent Claims (23, 24, 25, 26)
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27. A valve seat adapted to be disposed within a fluid cylinder for a pump assembly, the valve seat having a valve seat axis and comprising:
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a seat body, the seat body comprising an enlarged-diameter portion at one end thereof, the enlarged-diameter portion comprising a first tapered external shoulder, the first tapered external shoulder defining a first angle from the valve seat axis, and a frusto-conical surface extending at the first angle from the valve seat axis, wherein the enlarged-diameter portion defines a first cylindrical surface extending axially from the frusto-conical surface, the first cylindrical surface defining a first outside diameter, wherein the seat body defines an outside surface, the outside surface defining a second outside diameter that is less than the first outside diameter, wherein the outside surface of the seat body is tapered at a second angle from the valve seat axis, and wherein the frusto-conical surface is axially disposed between the outside surface and the first cylindrical surface; and a bore formed through the seat body and through which fluid flows along the valve seat axis, the bore defining a second cylindrical surface, the second cylindrical surface defining an inside diameter that is less than the second outside diameter. - View Dependent Claims (28, 29, 30, 31)
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32. A method of producing a first pump assembly based on a second pump assembly, the first and second pump assemblies comprising first and second fluid cylinders, respectively, and first and second valve seats, respectively, the first and second fluid cylinders comprising first and second fluid passages formed therein, respectively, in which the first and second valve seats are adapted to be disposed, respectively, the first and second fluid passages defining first and second inside diameters, respectively, the first and second valve seats defining first and second outside diameters, respectively, the method comprising:
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producing the first fluid cylinder, comprising sizing the first inside diameter to be less than the second outside diameter so that the second valve seat is not permitted to be disposed in the first fluid passage; and producing the first valve seat, comprising sizing the first outside diameter so that; the first outside diameter is less than the second inside diameter; and a radial clearance would be defined between the first valve seat and an inside surface of the second fluid cylinder defined by the second fluid passage if the first valve seat were to be disposed in the second fluid passage. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification