US3575198A
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: 1968-11-22
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Granted: 1971-04-20
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Expires: 1988-11-22
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, nonsealing 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
2026-11-02 16:25
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/227; F16K5/06; F16K5/0663; F16K5/0673; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
A valve, comprising a metallic valve body having a flowway therethrough, a closure member mounted within the body for movement between positions opening and closing the flowway, an annular valve seat mounted within the flowway on one side of the closure member, a groove about one of the flowway and valve seat opposite the annular surface of the other of said flowway and valve seat, and a ring within the groove for sealing between the flowway and valve seat, said ring being formed of a material which reforms into different shape if, when raised to an elevated temperature and then cooled to ambient temperature, it is confined againSt expansion, the base of the groove being deeper at one end than at the other and wider than the seal ring, and said ring being relatively loosely received in the deeper end of the groove and relatively tightly engaged between the base of the groove and said annular surface when received in the shallower end of the groove, so that said ring may be arranged in said deeper end when said temperature is raised to said elevated level and then caused to move into said shallower end when said ring is cooled to ambient temperature.
Claim 2
Dependent Claim
203 words
A valve, comprising a metallic valve body having a flowway therethrough, a closure member mounted within the body for movement between positions opening and closing the flowway, an annular valve seat mounted within the flowway on one side of the closure member, a groove about one of the flowway and valve seat opposite the annular surface of the other of said flowway and valve seat, and a ring within the groove for sealing between the flowway and valve seat, said ring being formed of a material which reforms into different shape if, when raised to an elevated temperature and then cooled to ambient temperature, it is confined againSt expansion, the base of the groove being deeper at one end than at the other and wider than the seal ring, and said ring being relatively loosely received in the deeper end of the groove and relatively tightly engaged between the base of the groove and said annular surface when received in the shallower end of the groove, so that said ring may be arranged in said deeper end when said temperature is raised to said elevated level and then caused to move into said shallower end when said ring is cooled to ambient temperature.
Claim 3
Dependent Claim
26 words
A valve of the character defined in claim 1, wherein said valve body includes separate portions which are welded together at a location near said ring.
Claim 4
Dependent Claim
52 words
A valve of the character defined in claim 2, wherein said valve body includes a central portion in which the closure member is mounted and another portion welded to and extending from one side of the central portion, and said valve seat is mounted within a recess in the other body portion.
Claim 5
Dependent Claim
153 words
Apparatus comprising a first member received concentrically within a second member, one of said members having a groove there about facing the other member, and a seal ring within the groove which is formed of a material such as Teflon which reforms into a different shape if raised to an elevated temperature and then cooled while confined against expansion, the base of the groove being deeper at one end than at the other and wider than the seal ring, and said seal ring being relatively loosely received in the deeper end of the groove and relatively tightly engaged between the base of the groove and said other member when received in the shallower end of the groove, so that said ring may be arranged in said deeper end during raising of the temperature of said ring to said level and then caused to move into said shallower end when the ring is cooled.
Claim 6
Dependent Claim
153 words
Apparatus comprising a first member received concentrically within a second member, one of said members having a groove there about facing the other member, and a seal ring within the groove which is formed of a material such as Teflon which reforms into a different shape if raised to an elevated temperature and then cooled while confined against expansion, the base of the groove being deeper at one end than at the other and wider than the seal ring, and said seal ring being relatively loosely received in the deeper end of the groove and relatively tightly engaged between the base of the groove and said other member when received in the shallower end of the groove, so that said ring may be arranged in said deeper end during raising of the temperature of said ring to said level and then caused to move into said shallower end when the ring is cooled.
Claim 7
Dependent Claim
16 words
Apparatus of the character defined in claim 4, wherein the base of the groove is conical.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |