US4158370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive activated plug
Assignee: B&W Nuclear Service Co
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Filing: 1978-06-09
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Granted: 1979-06-19
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Expires: 1998-06-09
Abstract
Abstract An explosive activated tube plug for effecting a mechanical seal within a tube is disclosed. The plug includes an internally tapered expansion sleeve, a frusto-conical piston disposed within the sleeve and an extension member to expedite plug placement. By remotely detonating an explosive disposed within the plug, the piston is driven forward to expand the sleeve against the surrounding tube surface. By modifying the physical structure of the plug, the energy-displacement relationship between the piston and sleeve may be selectively controlled.
Inventors
- 👤 Gordon C. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:51
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/13; B; B21; B21D; B21D39/00; B21D39/06; B21D39/066; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
An explosive-activated plug for mechanically sealing a tube comprising an expansion sleeve open at one end and closed at the other end and having a partially tapered internal cross section, a hardened tubular explosive case joined to the open-ended portion of the sleeve, a frusto-conical piston disposed within the sleeve and in contiguous contact with the interior walls thereof, an extension member detachably affixed to the case, explosive means disposed within the case and operable from a location outside thereof to cause the piston to expand the sleeve against the surrounding tube surface to effectuate a leak-proof seal therewith.
Claim 2
Dependent Claim
99 words
An explosive-activated plug for mechanically sealing a tube comprising an expansion sleeve open at one end and closed at the other end and having a partially tapered internal cross section, a hardened tubular explosive case joined to the open-ended portion of the sleeve, a frusto-conical piston disposed within the sleeve and in contiguous contact with the interior walls thereof, an extension member detachably affixed to the case, explosive means disposed within the case and operable from a location outside thereof to cause the piston to expand the sleeve against the surrounding tube surface to effectuate a leak-proof seal therewith.
Claim 3
Dependent Claim
26 words
The explosive-activated plug according to claim 1 wherein the sleeve includes first and second chambers of unequal circular cross section and a frusto-conical chamber interposed therebetween.
Claim 4
Dependent Claim
23 words
The explosive-activated plug according to claim 1 including a stem affixed to the piston, the stem extending at least partially into the case.
Claim 5
Dependent Claim
15 words
The explosive-activated plug according to claim 1 wherein the extension member threadably engages the case.
Claim 6
Dependent Claim
19 words
The explosive-activated plug according to claim 1 wherein a vent is formed in the sleeve adjacent to said case.
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) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |