Patent US1725698A successfully refreshed from Google Patents.
Patent US4432268A successfully refreshed from Google Patents.
US4432268A
Expired / Lapsed
US
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Detonation cut-off device
Assignee: Ireco Inc
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Filing: 1982-08-16
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Granted: 1984-02-21
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Expires: 2002-08-16
Abstract
Abstract A passive detonation cut-off device for a solid line of explosives operates by directionally controlling the detonation pressure of an accidental detonation wave of an explosives line and by using this directionally controlled detonation pressure to sever the explosives line to prevent further propogation of the detonation wave. The device comprises a body having two through holes extending through the body and at least one blast hole connecting the through holes and extending from one of the through holes to the outside of the body.
Inventors
- 👤 Kenneth A. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:53
CPC Classifications
F; F42; F42D; F42D5/00; F42D5/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A directionally controlled, detonation pressure actuated explosives line detonation cut-off device comprising a body having two through holes extending through the body and at least one blast hole connecting the through hole and extending from one of the through holes to the outside of the body, whereby detonation pressure is directed through the blast hole to sever an explosive line contained in the through holes.
Claim 2
Dependent Claim
65 words
A directionally controlled, detonation pressure actuated explosives line detonation cut-off device comprising a body having two through holes extending through the body and at least one blast hole connecting the through hole and extending from one of the through holes to the outside of the body, whereby detonation pressure is directed through the blast hole to sever an explosive line contained in the through holes.
Claim 3
Dependent Claim
12 words
A device according to claim 1 wherein the body is a parallelepiped.
Claim 4
Dependent Claim
13 words
A device according to claim 1 wherein the two through holes are parallel.
Claim 5
Dependent Claim
18 words
A device according to claim 3 wherein the blast hole or holes are perpendicular to the through holes.
Claim 6
Dependent Claim
31 words
A device according to claim 1 additionally containing a detonating cord threaded through each through hole in a manner so as to form a loop of cord between the through holes.
Claim 7
Dependent Claim
49 words
A device according to claim 5 wherein A/B>X/Y, where A=the length of the loop of cord, B=the velocity of detonation of the cord, X=the length of the blast hole or holes between the through holes, and Y=the velocity through the blast hole of the detonation pressure of the cord.
Claim 8
Dependent Claim
25 words
A device according to claim 6, wherein the detonating cord is 50 grain and the distance between the through holes is at least 3/4 inch.
Claim 9
Dependent Claim
26 words
A device according to claim 1 having at least two oppositely directed blast holes which thus extend to the outside of the body on opposite sides.
Claim 10
Dependent Claim
16 words
A device according to claim 8 having at least two sets of oppositely directed blast holes.
References Cited (Backward Citations)
US3368485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |