Patent US3780927A successfully refreshed from Google Patents.
US3780927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope for explosive connection of metal pipes
Assignee: Individual
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Filing: 1973-01-24
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Granted: 1973-12-25
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Expires: 1993-01-24
Abstract
Abstract The connecting together of metal pipes by explosive welding, particularly metal sheaths for communication cables in which pipes of different diameters are inserted one into another, and a ring-shaped explosive charge is disposed on the outer surface of the pipe of large diameter over the location of its prospective joint with the other pipe, whereafter explosion of the charge connects the pipes together. On the outside of the charge, an inertial envelope is formed of a material, easier to deform than the metal pipes to be welded together.
Inventors
- 👤 L Lexandrovich
- 👤 V Kudinov
- 👤 J Bushtedt
- 👤 G Pogoretsky
- 👤 V Kotov
- 👤 D Dudko
- 👤 G Arkangelsky
- 👤 B Surnin
- 👤 I Degtyarev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:10
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/06; B23K20/08; B23K20/085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
An inertial annular envelope for enclosing an explosive charge for joining metal pipes of different diaMeters inserted one into the other, with the charge being placed on the outer surface of the pipe of larger diameter at a point where it is to be jointed to the other pipe, said envelope comprising a first ring placed directly on the pipe of larger diameter, said first ring having an outer slot to accommodate an explosive charge, the inside surface of the first ring being tapered for widening the welding zone and for convenient mounting on the pipe of larger diameter, the thickness of the side wall of the first ring being not less than the diameter of the charge, and a second ring covering the charge, said second ring having on its inside surface a collar to engage the slot of the first ring to seal off the explosive charge.
Claim 2
Dependent Claim
149 words
An inertial annular envelope for enclosing an explosive charge for joining metal pipes of different diaMeters inserted one into the other, with the charge being placed on the outer surface of the pipe of larger diameter at a point where it is to be jointed to the other pipe, said envelope comprising a first ring placed directly on the pipe of larger diameter, said first ring having an outer slot to accommodate an explosive charge, the inside surface of the first ring being tapered for widening the welding zone and for convenient mounting on the pipe of larger diameter, the thickness of the side wall of the first ring being not less than the diameter of the charge, and a second ring covering the charge, said second ring having on its inside surface a collar to engage the slot of the first ring to seal off the explosive charge.
References Cited (Backward Citations)
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US3455017A
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US3542276A
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US3563713A
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US3605777A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |