Patent US3559668A successfully refreshed from Google Patents.
US3559668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-03-04
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Granted: 1971-02-02
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Expires: 1989-03-04
Abstract
Abstract A safety valve for use on a tire or other pressure chamber to release internal pressure in the event of excessive pressure or temperature within the chamber. The present embodiments show a cylindrical hollow housing threaded into a wheel rim. A cylindrical sleeve of eutectic material is positioned in the center bore of the housing and carries a ball or disc which retains the pressure within a tire mounted on the wheel. When the pressure or temperature of the tire reaches a certain predetermined safe maximum, the eutectic sleeve will either melt and release the pressure retaining ball or disc, or due to the softness of the sleeve, will permit the ball or disc to be forced outwardly from the sleeve when the internal pressure reaches a certain predetermined maximum.
Inventors
- 👤 Richard L Crossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:37
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/40; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
196 words
A safety valve for a pressure chamber comprising: A. a housing having an inner end sealingly fastened in a wall opening of a pressure chamber and having an axial center bore in communication with the interior and exterior of the chamber; B. a eutectic sleeve in the center bore of the housing, said sleeve having a center bore therethrough; and C. a noneutectic pressure retaining ball held within the center bore of said sleeve so long as a predetermined maximum safe pressure and temperature of the pressure vessel is not exceeded but released by the sleeve when the maximum safe temperature or pressure is exceeded; D. the diameter of the center bore of the eutectic sleeve adjacent the axially inner end being substantially the same as the diameter of the pressure retaining ball and the diameter of the center bore of the sleeve adjacent the axially outer end thereof being smaller than the diameter of the ball to retain the ball in the sleeve so long as normal pressure and temperature is maintained within the pressure chamber; E. the periphery of the ball sealing directly against the surface of the inner bore of the eutectic sleeve.
Claim 2
Dependent Claim
196 words
A safety valve for a pressure chamber comprising: A. a housing having an inner end sealingly fastened in a wall opening of a pressure chamber and having an axial center bore in communication with the interior and exterior of the chamber; B. a eutectic sleeve in the center bore of the housing, said sleeve having a center bore therethrough; and C. a noneutectic pressure retaining ball held within the center bore of said sleeve so long as a predetermined maximum safe pressure and temperature of the pressure vessel is not exceeded but released by the sleeve when the maximum safe temperature or pressure is exceeded; D. the diameter of the center bore of the eutectic sleeve adjacent the axially inner end being substantially the same as the diameter of the pressure retaining ball and the diameter of the center bore of the sleeve adjacent the axially outer end thereof being smaller than the diameter of the ball to retain the ball in the sleeve so long as normal pressure and temperature is maintained within the pressure chamber; E. the periphery of the ball sealing directly against the surface of the inner bore of the eutectic sleeve.
Claim 3
Dependent Claim
33 words
A safety valve as claimed in claim 1 wherein the housing has an integral closed end portion for retaining the ball in thE outer end of the housing after release from the sleeve.
Claim 4
Dependent Claim
9 words
an outer end portion extending away from the chamber,
Claim 5
Dependent Claim
9 words
an outer end portion extending away from the chamber,
Claim 6
Dependent Claim
19 words
A safety valve responsive to excessive heat and pressure for use on pressurized chambers comprising: A. a housing having:
Claim 7
Dependent Claim
19 words
A safety valve responsive to excessive heat and pressure for use on pressurized chambers comprising: A. a housing having:
Claim 8
Dependent Claim
21 words
an axial center bore extending at least part of the axial length of the housing from the inner end thereof, and
Claim 9
Dependent Claim
21 words
an axial center bore extending at least part of the axial length of the housing from the inner end thereof, and
Claim 10
Dependent Claim
33 words
A safety valve as claimed in claim 3 including means to prevent axial movement of the fusible sleeve in the housing when a safe pressure and temperature is maintained in the pressure chamber.
Claim 11
Dependent Claim
191 words
the outer end portion having at least one pressure escape opening; B. means sealingly fastening the housing to a wall opening in a pressure chamber; C. a fusible sleeve located in at least part of the center bore of the housing, said sleeve having a center bore therethrough; D. nonfusible pressure retaining ball centrally located within the fusible sleeve; E. said fusible sleeve having a melting point at substantially the maximum safe temperature for the pressure chamber and said sleeve being of sufficiently soft material to release the nonfusible ball when the maximum safe pressure for the chamber is exceeded; F. the diameter of the center bore of the fusible sleeve adjacent the axially inner end being substantially the same as the diameter of the pressure retaining ball and the diameter of the center bore of the sleeve adjacent the axially outer end thereof being smaller than the diameter of the ball to retain the ball in the sleeve so long as normal pressure and temperature is maintained within the pressure chamber; G. the periphery of the ball sealing directly against the surface of the inner bore of the fusible sleeve.
Claim 12
Dependent Claim
191 words
the outer end portion having at least one pressure escape opening; B. means sealingly fastening the housing to a wall opening in a pressure chamber; C. a fusible sleeve located in at least part of the center bore of the housing, said sleeve having a center bore therethrough; D. nonfusible pressure retaining ball centrally located within the fusible sleeve; E. said fusible sleeve having a melting point at substantially the maximum safe temperature for the pressure chamber and said sleeve being of sufficiently soft material to release the nonfusible ball when the maximum safe pressure for the chamber is exceeded; F. the diameter of the center bore of the fusible sleeve adjacent the axially inner end being substantially the same as the diameter of the pressure retaining ball and the diameter of the center bore of the sleeve adjacent the axially outer end thereof being smaller than the diameter of the ball to retain the ball in the sleeve so long as normal pressure and temperature is maintained within the pressure chamber; G. the periphery of the ball sealing directly against the surface of the inner bore of the fusible sleeve.
Claim 13
Dependent Claim
36 words
A safety valve as claimed in claim 3 wherein the valve is used as a safety valve on a tire chamber and wherein the valve housing is held by a threaded opening in a wheel rim.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |