US3657783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Establishment of a seal between concentric surfaces in a high temperature environment
Assignee: Cooper Industries LLC
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Filing: 1970-05-11
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Granted: 1972-04-25
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Expires: 1990-05-11
Abstract
Abstract A valve comprising a valve body having a central portion in which a ball is rotatably mounted, a tubular extension welded to each side of the central portion, and an annular seat mounted in the flowway through each tubular extension. In the assembly of the valve, the seat is mounted within the flowway during welding of the extension to the central portion of the body. There is a groove in the flowway about each valve seat, and a sealing ring is carried within each groove. The ring is of a material such as Teflon which, if confined against expansion while heated due to its proximity to the weld between the body portions, would reform into a different, non-sealing shape when cooled to ambient temperature. The base of the groove is deeper at one end than at the other and wider than the seal ring, so that said ring is relatively loosely received within the deeper end of the groove and relatively tightly engaged between the seat and the shallower end of the groove. The seal ring is arranged within the deeper end of the groove during welding and then moved into the shallower end thereof when the ring is cooled.
Inventors
- 👤 Frank V Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/227; F16K5/06; F16K5/0663; F16K5/0673; Y; Y10; Y10S; Y10S277/00; Y10S277/922; Y10S277/923; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49425
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
In a method of assembling a valve which includes an annular valve seat mounted within a flowway through the valve body for engaging one side of the closure member therein, and a seal ring of Teflon or like material for sealing between the flowway and valve seat, aNd wherein the valve body includes separate portions which are welded together at a location near said ring so as to raise said ring to a temperature at which such ring, if confined against expansion, will reform into a different shape upon cooling, the steps of providing a groove in the flowway and about the seat which is wider than the seal ring and which is deeper at one end than at the other so as to receive the seal ring relatively loosely at said one end and relatively tightly at said other end, arranging said ring in the one end of the groove as said body portions are so welded, and then, upon completion of the welding and cooling of said ring, moving said ring into said other end of the groove so as to cause it to seal between said seat and flowway.
Claim 2
Dependent Claim
192 words
In a method of assembling a valve which includes an annular valve seat mounted within a flowway through the valve body for engaging one side of the closure member therein, and a seal ring of Teflon or like material for sealing between the flowway and valve seat, aNd wherein the valve body includes separate portions which are welded together at a location near said ring so as to raise said ring to a temperature at which such ring, if confined against expansion, will reform into a different shape upon cooling, the steps of providing a groove in the flowway and about the seat which is wider than the seal ring and which is deeper at one end than at the other so as to receive the seal ring relatively loosely at said one end and relatively tightly at said other end, arranging said ring in the one end of the groove as said body portions are so welded, and then, upon completion of the welding and cooling of said ring, moving said ring into said other end of the groove so as to cause it to seal between said seat and flowway.
Claim 3
Dependent Claim
162 words
In a method of establishing a seal between a first member concentrically received within an opening in a second member by means of a seal ring of Teflon or like material, and in an environment in which the ambient temperature is raised to a level at which such ring, if confined against expansion, will reform into a different shape upon cooling, the steps of providing a groove about one of said members and opposite the concentric surface of the other member which is wider than the seal ring and deeper at one end than at the other so as to be adapted to receive said ring relatively loosely at said one end and relatively tightly at said other end, arranging said ring within said one end of the groove as said temperature is so raised, and moving said ring into said other end of the groove when said ring has cooled so as to cause it to sealably engage with said members.
Claim 4
Dependent Claim
162 words
In a method of establishing a seal between a first member concentrically received within an opening in a second member by means of a seal ring of Teflon or like material, and in an environment in which the ambient temperature is raised to a level at which such ring, if confined against expansion, will reform into a different shape upon cooling, the steps of providing a groove about one of said members and opposite the concentric surface of the other member which is wider than the seal ring and deeper at one end than at the other so as to be adapted to receive said ring relatively loosely at said one end and relatively tightly at said other end, arranging said ring within said one end of the groove as said temperature is so raised, and moving said ring into said other end of the groove when said ring has cooled so as to cause it to sealably engage with said members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |