# US 2019/0316702 A1 · Spherical valve stem seat and method of making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316702 A1 - Document ID: US20190316702A1 - Status: Published application - Kind: A1 - Application number: 16/385,617 - Filed: 2019-04-16 - Published: 2019-10-17 - Earliest claimed: 2018-04-17 - Assignees: T-Lon Products, Inc. - Applicants: T-Lon Products, Inc. - Inventors: Jon Scharrer - Web page: https://patentgrep.com/patent/US20190316702A1 ## CPC - F16K 1/36: Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) - F16K 27/067: {with spherical plugs} - F16K 1/46: Attachment of sealing rings - F16K 5/0605: {with particular plug arrangements, e.g. particular shape or built-in means} - F16K 5/0689: {between housing and plug} - F16K 5/201: {with the housing or parts of the housing mechanically pressing the seal against the plug} - F16K 1/44: Details of seats or valve members of double-seat valves - 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)} ## Abstract An at least one spherical valve stem seat and a method for manufacturing the at least one spherical valve stem seat. The at least one spherical valve stem seat has a finished valve stem seat blank and a shell in retained communication therewith. The method for manufacturing the at least one spherical valve stem seat includes a molding process and an accompanying sintering, and machining process. ## Claims ### Claim 1 A valve stem seat comprising: a blank and a shell in molded communication; said blank having a first section, a second section, a base assembly, and an extension; said base assembly having a first side and a second side opposite said first side, wherein said extension in communication with said first side; said first section in communication with said second side; said second section having a second section base; said second section base in communication with said first section, opposite said second side, wherein said communication provides for a lip; said shell having a shell first side and a shell second side, wherein said shell second side having a hemispherical geometry defining said valve stem seat; and said shell first side providing for a shelf, wherein communication of said lip and said shelf retains said shell in communication with said blank. ### Claim 2 (depends on 1) The valve stem seat of claim 1, further comprising said base assembly having an arched perimeter, wherein said arched perimeter extending opposite said extension. ### Claim 3 (depends on 2) The valve stem seat of claim 2, further comprising said arched perimeter defined by a terminal edge, wherein said terminal edge and said shell communicate to provide a profile finish. ### Claim 4 (depends on 1) The valve stem seat of claim 1, further comprising said first section having a cylindrical shape. ### Claim 5 (depends on 1) The valve stem seat of claim 1, further comprising said second section having said second section base in communication with a second section hemisphere, wherein said second section hemisphere is in communication with said shell first side. ### Claim 6 (depends on 1) The valve stem seat of claim 1, further comprising said extension having a first end, a second end and a length separating said first end and said second end. ### Claim 7 (depends on 6) The valve stem seat of claim 6, wherein said first end is affixed to said first side. ### Claim 8 (depends on 6) The valve stem seat of claim 6, wherein said second end provides for a bore. ### Claim 9 (depends on 8) The valve stem seat of claim 8, further comprising said bore having a bore first end in communication with said second end. ### Claim 10 (depends on 1) The valve stem seat of claim 1, further comprising said first section having a first section first side opposite a first section second side, wherein said first section first side is in communication with said second side and said first section second side is in communication with said second section. ### Claim 11 (depends on 1) The valve stem seat of claim 1, further comprising said first section having a first diameter and said second section base having a second diameter, wherein a difference in said first diameter and said second diameter provides for said lip. ### Claim 12 (depends on 1) The valve stem seat of claim 1, further comprising said shell first side having a negative geometry, wherein said shell first side is in substantial communication with at least one of said first section and said second section. ### Claim 13 (depends on 12) The valve stem seat of claim 12, wherein said negative geometry provides for said shelf. ### Claim 14 A method of manufacturing a valve stem seat comprising: positioning a first punch assembly in close proximity to a second punch assembly, wherein said second punch assembly comprises a punch and a collar; placing a blank on said punch; lowering said punch to a second position, wherein a relationship of said collar to said punch provides for a cavity; inserting resin into said cavity; lowering said first punch assembly, wherein said first punch assembly is in close proximity to said punch, wherein a shell is formed creating a stem seat head; removing said valve stem seat from said punch; sintering said valve stem seat, wherein a first dimension of a stem seat head is reduced to a second dimension; and machining a base assembly of said blank and said shell of said stem seat head, wherein an intersection of said base assembly and said shell provides for a profile finish. ### Claim 15 (depends on 14) The method of claim 14, further comprising said punch having a punch perimeter, wherein said collar in communication with said punch perimeter. ### Claim 16 (depends on 14) The method of claim 14 wherein, said resin is PTFE. ### Claim 17 (depends on 14) The method of claim 14 further comprising, said first punch assembly having a hemispherical cross-section on a first punch first side, wherein said hemispherical cross-section provides for formation of said first dimension. ### Claim 18 (depends on 14) The method of claim 14 wherein, wherein said machining further comprises turning a chamfer on said second dimension. ### Claim 19 (depends on 18) The method of claim 18 further comprising rolling said base assembly over said chamfer. ### Claim 20 (depends on 19) The method of claim 19 further comprising, removing a material to create said profile finish.