US3922903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature aqueous stress corrosion testing device
Assignee: United States Department of Energy
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Filing: 1974-09-27
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Granted: 1975-12-02
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Expires: 1994-09-27
Abstract
Abstract A device for stressing tensile samples contained within a high temperature, high pressure aqueous environment, thereby permitting determination of stress corrosion susceptibility of materials in a simple way. The stressing device couples an external piston to an internal tensile sample via a pull rod, with stresses being applied to the sample by pressurizing the piston. The device contains a fitting/seal arrangement including Teflon and weld seals which allow sealing of the internal system pressure and the external piston pressure. The fitting/seal arrangement allows free movement of the pull rod and the piston.
Inventors
- 👤 Arthur N Bornstein
- 👤 Maurice E Indig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:29
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/18; G01N17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
353 words
A device for stressing tensile specimens contained within a high temperature, high pressure system comprising: means for securing a specimen to be tested within a pressure vessel, means for connecting a specimen to be tested to a pressure actuated means located externally of said pressure vessel, said connecting means including a pull rod connected at one end thereof to means for gripping a specimen to be tested and at the opposite end to said pressure actuated means, said pressure actuated means comprising a piston accumulator having a piston movable therein and secured to said pull rod and having means for directing fluid pressure to said piston for moving same thereby stressing a specimen to be tested, and means mounted with respect to said connecting means external of each said pressure vessel and said pressure actuated means for preventing hydraulic and thermal interaction between pressure and temperature within said pressure vessel and said pressure actuated means comprising a fitting-seal assembly secured intermediate said pressure vessel and said pressure actuated means, said pull rod extending through said fitting-seal assembly, said fitting-seal assembly including a Teflon seal positioned about said pull rod preventing leakage of fluid therethrough while allowing free movement of said pull rod, said fitting-seal assembly additionally including a fitting having a body member defining a passageway therethrough for passage of said pull rod with said passageway having an enlarged end section defining a cavity, and a cap member removably secured to said body member and having an aperture therein through which said pull rod passes, said Teflon seal being located within said cavity of said body member, said fitting also including a thrust collar fixedly secured to said cap member and positioned in said cavity of said body member about said pull rod and adjacent said Teflon seal, said body member additionally including a threaded end portion secured in a threaded opening in said pressure vessel, and said cap member being provided with a nipple aligned with said aperture therein and having a threaded end portion removably secured to a nipple-like member surrounding said pull rod and secured to said pressure actuated means.
Claim 2
Independent Claim
353 words
A device for stressing tensile specimens contained within a high temperature, high pressure system comprising: means for securing a specimen to be tested within a pressure vessel, means for connecting a specimen to be tested to a pressure actuated means located externally of said pressure vessel, said connecting means including a pull rod connected at one end thereof to means for gripping a specimen to be tested and at the opposite end to said pressure actuated means, said pressure actuated means comprising a piston accumulator having a piston movable therein and secured to said pull rod and having means for directing fluid pressure to said piston for moving same thereby stressing a specimen to be tested, and means mounted with respect to said connecting means external of each said pressure vessel and said pressure actuated means for preventing hydraulic and thermal interaction between pressure and temperature within said pressure vessel and said pressure actuated means comprising a fitting-seal assembly secured intermediate said pressure vessel and said pressure actuated means, said pull rod extending through said fitting-seal assembly, said fitting-seal assembly including a Teflon seal positioned about said pull rod preventing leakage of fluid therethrough while allowing free movement of said pull rod, said fitting-seal assembly additionally including a fitting having a body member defining a passageway therethrough for passage of said pull rod with said passageway having an enlarged end section defining a cavity, and a cap member removably secured to said body member and having an aperture therein through which said pull rod passes, said Teflon seal being located within said cavity of said body member, said fitting also including a thrust collar fixedly secured to said cap member and positioned in said cavity of said body member about said pull rod and adjacent said Teflon seal, said body member additionally including a threaded end portion secured in a threaded opening in said pressure vessel, and said cap member being provided with a nipple aligned with said aperture therein and having a threaded end portion removably secured to a nipple-like member surrounding said pull rod and secured to said pressure actuated means.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |