Patent US3535304A successfully refreshed from Google Patents.
Patent US3971290A successfully refreshed from Google Patents.
US3971290A
Expired / Lapsed
US
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Explosive linear cutter
Assignee: United States Department of the Navy
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Filing: 1974-09-13
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Granted: 1976-07-27
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Expires: 1994-09-13
Abstract
Abstract An explosive linear cutter for cutting materials comprising an explosive rge sheathed in a metal covering, a support for said charge surrounding the covering except for a slot facing the target material to be cut. Separation of the target material is effected by propelling a fragment of metal sheath at high velocity through the slot and into the target upon detonation of said explosive charge to thereby achieve a clean highly directional cut along a desired separation line. This abstract is for the purpose of providing a non-legal brief statement to serve as a searching tool and is not intended to limit the scope of the invention as disclosed herein nor limit the scope or fair meaning of the appended claims.
Inventors
- 👤 Jim W. Blain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:48
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/04; B65; B65H; B65H2301/00; B65H2301/50; B65H2301/51; B65H2301/515; B65H2301/5153; B65H2301/51531
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
185 words
Apparatus for making a clean cut in a composite laminate of graphite/fiberglass material comprising: cutter means for propelling a high velocity metal fragment into the material to be cut, said cutter means comprising: an explosive longitudinal core sheathed in a metal covering, said core and said covering having a circular cross section, said covering being adapted to fragment upon firing of said core; a support extending in a longitudinal direction and having an elongate bore of circular cross section in intimate contact with the core metal cover to encompass it over more than one hundred and eighty degrees of its external surface; a narrow longitudinal slot with parallel walls having an internal width dimension that is no greater than the diameter of said bore, said slot extending from the bore and forming a spaced opening between a portion of the sheathed core and the material to be cut when the latter is placed upon the support over the slot for cutting by means of a highly directional jet formed from a portion of said sheath and by said slot geometry upon explosion of said core.
Claim 2
Dependent Claim
185 words
Apparatus for making a clean cut in a composite laminate of graphite/fiberglass material comprising: cutter means for propelling a high velocity metal fragment into the material to be cut, said cutter means comprising: an explosive longitudinal core sheathed in a metal covering, said core and said covering having a circular cross section, said covering being adapted to fragment upon firing of said core; a support extending in a longitudinal direction and having an elongate bore of circular cross section in intimate contact with the core metal cover to encompass it over more than one hundred and eighty degrees of its external surface; a narrow longitudinal slot with parallel walls having an internal width dimension that is no greater than the diameter of said bore, said slot extending from the bore and forming a spaced opening between a portion of the sheathed core and the material to be cut when the latter is placed upon the support over the slot for cutting by means of a highly directional jet formed from a portion of said sheath and by said slot geometry upon explosion of said core.
Claim 3
Dependent Claim
22 words
An explosive core according to claim 1 wherein the diameter of said core is in the range of 0.030 to 0.075 inches.
References Cited (Backward Citations)
US3139031A
Cited
US3185090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |