US4049151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal expansion plug
Assignee: Raychem Corp
•
Filing: 1973-01-04
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Granted: 1977-09-20
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Expires: 1993-01-04
Abstract
Abstract A device for plugging or sealing apertures comprising a heat recoverable dished disc which has the capability to increase its radial dimension upon being heated to a temperature above the transition temperature of the metal. Sealing is accomplished by selecting a heat recoverable dished disc having a radial dimension smaller than that of the aperture to be sealed, but which is capable of increasing its radial dimension to a magnitude greater than that of the aperture. The disc is inserted into the aperture and exposed to a temperature higher than its transition temperature whereupon the disc attempts to return to its original substantially planar configuration thereby increasing in radial dimension and sealing the aperture.
Inventors
- 👤 Robert J. Schweiso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/02; B23; B23P; B23P11/00; B23P11/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A heat recoverable metal plug, which has been deformed from a heat-stable configuration into a heat-unstable configuration, having a transverse dimension smaller in its heat-unstable condition than in its heat-stable condition, said plug being capable of changing its transverse dimension upon being heated to above the transition temperature at which it recovers to its heat-stable condition from its heat-unstable condition, said plug is heat unstable in its martensitic state and heat-stable in its austenitic state.
Claim 2
Dependent Claim
75 words
A heat recoverable metal plug, which has been deformed from a heat-stable configuration into a heat-unstable configuration, having a transverse dimension smaller in its heat-unstable condition than in its heat-stable condition, said plug being capable of changing its transverse dimension upon being heated to above the transition temperature at which it recovers to its heat-stable condition from its heat-unstable condition, said plug is heat unstable in its martensitic state and heat-stable in its austenitic state.
Claim 3
Dependent Claim
15 words
The plug of claim 1 wherein said plug comprises an alloy of titanium and nickel.
Claim 4
Dependent Claim
12 words
The plug of claim 1 wherein said plug has a dished configuration.
Claim 5
Dependent Claim
19 words
The plug of claim 1 wherein said plug is provided with means for locating said plug in an aperture.
Claim 6
Dependent Claim
60 words
A heat-recoverable metal plug having a generally circular dished configuration in its heat-unstable state, said plug being capable of recovering to a substantially flat configuration upon being heated to above the transition temperature at which it reverts from its heat-unstable state to its heat-stable state, said plug is heat unstable in its martensitic state and heat-stable in its austenitic state.
Claim 7
Dependent Claim
60 words
A heat-recoverable metal plug having a generally circular dished configuration in its heat-unstable state, said plug being capable of recovering to a substantially flat configuration upon being heated to above the transition temperature at which it reverts from its heat-unstable state to its heat-stable state, said plug is heat unstable in its martensitic state and heat-stable in its austenitic state.
Claim 8
Dependent Claim
15 words
The plug of claim 5 wherein said plug comprises an alloy of titanium and nickel.
Claim 9
Dependent Claim
19 words
The plug of claim 5 wherein said plug is provided with means for locating said plug in an aperture.
References Cited (Backward Citations)
US1101084A
Cited
US1363153A
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GB423518A
Cited
US2575213A
Cited
US2687228A
Cited
GB1076494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |