# US 2019/0170138 A1 · Pump assembly including fluid cylinder and tapered valve seats > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170138 A1 - Document ID: US20190170138A1 - Status: Published application - Kind: A1 - Application number: 16/269,930 - Filed: 2019-02-07 - Published: 2019-06-06 - Earliest claimed: 2013-01-31 - Assignees: S.P.M. Flow Control, Inc. - Applicants: S.P.M. Flow Control, Inc. - Inventors: Jacob A. Bayyouk; Tugrul Comlekci - Web page: https://patentgrep.com/patent/US20190170138A1 ## CPC - F04B 53/1087: {Valve seats} - B23P 6/00: Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10) - B23P 15/00: Making specific metal objects by operations not covered by a single other subclass or a group in this subclass - F04B 7/00: Piston machines or pumps characterised by having positively-driven valving - F04B 53/10: Valves; Arrangement of valves - F04B 53/16: Casings; Cylinders; Cylinder liners or heads; Fluid connections - F04B 53/162: {Adaptations of cylinders} - F04B 53/22: Arrangements for enabling ready assembly or disassembly - F16K 1/36: Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) - F16K 1/42: Valve seats (for double-seat valves F16K1/44) - F16K 15/063: {the valve being loaded by a spring} - F16K 25/00: Details relating to contact between valve members and seats (movement of valve members other than for opening and closing F16K29/00) - Y10T 29/49236: Fluid pump or compressor making - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## 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. ## Claims ### Claim 1 A valve seat adapted to be disposed within a fluid cylinder of a pump assembly, the valve seat comprising: a seat body defining an axis, the seat body comprising an enlarged-diameter portion defining a tapered external shoulder extending at a first acute angle from the axis and a tapered surface extending at a second acute angle from the axis; wherein the tapered external shoulder is adapted to engage the fluid cylinder of the pump assembly; and wherein the first and second acute angles are measured from the axis in a same angular direction, the first acute angle being less than the second acute angle; and a bore extending through the seat body along the axis; wherein the tapered surface is adapted to be reciprocably engaged by a valve member of the pump assembly. ### Claim 2 (depends on 1) The valve seat of claim 1, wherein the seat body further defines a first outside surface having a first outside diameter. ### Claim 3 (depends on 2) The valve seat of claim 2, wherein the first outside surface is adapted to engage the fluid cylinder of the valve seat. ### Claim 4 (depends on 2) The valve seat of claim 2, wherein the enlarged-diameter portion further defines a second outside surface extending axially from the tapered external shoulder, the second outside surface having a second outside diameter that is greater than the first outside diameter. ### Claim 5 (depends on 4) The valve seat of claim 4, wherein the tapered external shoulder is axially disposed between the first outside surface and the second outside surface. ### Claim 6 (depends on 2) The valve seat of claim 2, wherein the bore defines an inside surface having an inside diameter that is less than the first outside diameter. ### Claim 7 (depends on 6) The valve seat of claim 6, further comprising: an annular groove formed in the first outside surface and having a groove diameter that is less than the first outside diameter and greater than the inside diameter; and a sealing element disposed within the annular groove. ### Claim 8 (depends on 2) The valve seat of claim 2, wherein the first outside surface is tapered at a third acute angle measured in the same angular direction from the axis, the third acute angle being less than both the first and second acute angles. ### Claim 9 (depends on 2) The valve seat of claim 2, further comprising an annular notch formed in the seat body adjacent each of the first outside surface and the tapered external shoulder. ### Claim 10 (depends on 1) The valve seat of claim 1, wherein the tapered external shoulder defines a frusto-conical surface. ### Claim 11 A pump assembly, comprising: a fluid cylinder; a valve seat disposed within the fluid cylinder, the valve seat comprising: a seat body defining an axis, the seat body comprising an enlarged-diameter portion defining a tapered external shoulder extending at a first acute angle from the axis and a tapered surface extending at a second acute angle from the axis; wherein the tapered external shoulder engages the fluid cylinder of the pump assembly; and wherein the first and second acute angles are measured from the axis in a same angular direction, the first acute angle being less than the second acute angle; and a bore extending through the seat body along the axis; and a valve member reciprocable to sealingly engage the tapered surface. ### Claim 12 (depends on 11) The pump assembly of claim 11, wherein the seat body further defines a first outside surface having a first outside diameter. ### Claim 13 (depends on 12) The pump assembly of claim 12, wherein the first outside surface engages the fluid cylinder of the pump assembly. ### Claim 14 (depends on 12) The pump assembly of claim 12, wherein the enlarged-diameter portion further defines a second outside surface extending axially from the tapered external shoulder, the second outside surface having a second outside diameter that is greater than the first outside diameter. ### Claim 15 (depends on 14) The pump assembly of claim 14, wherein the tapered external shoulder is axially disposed between the first outside surface and the second outside surface. ### Claim 16 (depends on 12) The pump assembly of claim 12, wherein the bore defines an inside surface having an inside diameter that is less than the first outside diameter. ### Claim 17 (depends on 16) The pump assembly of claim 16, further comprising: an annular groove formed in the first outside surface and having a groove diameter that is less than the first outside diameter and greater than the inside diameter; and a sealing element disposed within the annular groove. ### Claim 18 (depends on 12) The pump assembly of claim 12, wherein the first outside surface is tapered at a third acute angle measured in the same angular direction from the axis, the third acute angle being less than both the first and second acute angles. ### Claim 19 (depends on 12) The pump assembly of claim 12, further comprising an annular notch formed in the seat body adjacent each of the first outside surface and the tapered external shoulder. ### Claim 20 (depends on 11) The pump assembly of claim 11, wherein the tapered external shoulder defines a frusto-conical surface.