Patent US4753170A successfully refreshed from Google Patents.
US4753170A
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Polygonal detonating cord and method of charge initiation
Assignee: JET RESEARH CENTR Inc A TX CORP
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Filing: 1985-02-25
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Granted: 1988-06-28
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Expires: 2005-02-25
Abstract
Abstract The present invention comprises a detonating cord of polygonal cross section having three or more substantially flat sides of substantially equal length and substantially equal included angles between each of the sides.
Inventors
- 👤 John A. Regalbuto
- 👤 Jack E. Dines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:33
CPC Classifications
C; C06; C06C; C06C5/00; C06C5/04; E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; E21B43/1185; F; F42; F42D; F42D1/00; F42D1/04; Y; Y10; Y10S; Y10S102/00; Y10S102/701
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A method of initiating clustered shaped charges, comprising: providing a plurality of shaped charges, each of said charges including a booster charge at one end thereof and a mouth at the other end thereof; disposing said plurality of shaped charges in at least one cluster about a center point, with said booster charges of said shaped charges pointed toward said center point of said at least one cluster and said mouths of said shaped charges are pointed substantially radially outward; disposing a detonating cord through said center point of said at least one cluster proximate said booster charges; igniting said detonating cord; and directing the explosive energy arising from the ignition in substantially equal plane energy waves against each of said booster charges.
Claim 2
Independent Claim
123 words
A method of initiating clustered shaped charges, comprising: providing a plurality of shaped charges, each of said charges including a booster charge at one end thereof and a mouth at the other end thereof; disposing said plurality of shaped charges in at least one cluster about a center point, with said booster charges of said shaped charges pointed toward said center point of said at least one cluster and said mouths of said shaped charges are pointed substantially radially outward; disposing a detonating cord through said center point of said at least one cluster proximate said booster charges; igniting said detonating cord; and directing the explosive energy arising from the ignition in substantially equal plane energy waves against each of said booster charges.
Claim 3
Dependent Claim
38 words
The method of claim 1, further comprising disposing said plurality of charges in a plurality of clusters, disposing said plurality of clusters one above the other, and running said detonating cord through the center points of said clusters.
Claim 4
Dependent Claim
38 words
The method of claim 2, further including rotating each of said clusters with respect to adjacent clusters so that said mouths of said shaped charges of each cluster are pointed radially outward between those of said adjacent clusters.
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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) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |