Patent US3276372A successfully refreshed from Google Patents.
US3276372A
Expired / Lapsed
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Booster device
Assignee: Hercules Powder Co
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Filing: 1965-04-28
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Granted: 1966-10-04
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Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Cerwonka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:13
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A BOOSTER DEVICE WHICH IS DESIGNED TO RECEIVE A BLASTING CAP AND TO HOLD SAID CAP SECURELY THEREIN, SAID DEVICE HAVING IN COMBINATION: (A) AN OUTER METAL SHELL HAVING A CLOSED BOTTOM AND AN OPEN TOP; (B) AN INNER METAL SHELL OF SUFFICIENT LENGTH AND DIAMETER TO ACCOMMODATE A BLASTING CAP AND OF LESS LENGTH THAN THE OUTER SHELL HAVING A CLOSED BOTTOM AND AN OPEN TOP AND BEING COAXIALLY DISPOSED WITHIN SAID OUTER SHELL WITH THE OPEN TOP THEREOF POSITIONED SLIGHTLY BELOW THE TOP OF THE OUTER SHELL; (C) A CHARGE OF CAP-SENSITIVE EXPLOSIVE DISPOSED WITHIN THE ANNULAR AND BOTTOM SPACE BETWEEN THE OUTER SHELL AND THE INNER SHELL TO ADJACENT THE TOP THEREOF; (D) A RESILIENT SEALING MEMBER DISPOSED OVER THE CHARGE AND BETWEEN THE INNER SHELL AND THE OUTER SHELL TO THE TOP THEREOF, SAID RESILIENT SEALING MEMBER HAVING AN OVERHANGING LIP IN THE TOP THEREOF WITH A CENTRAL OPENING OF LESS DIAMETER THAN THE INNER SHELL AND HAVING A RUPTURABLE MEMBRANE BENEATH THE OVERHANGING LIP, SAID MEMBRANE EXTENDING OVER THE TOP OF THE INNER SHELL; AND (E) A CRIMP FORMED ADJACENT THE TOP OF THE OUTER SHELL TO COMPRESS THE SEALING MEMBER.
Claim 2
Dependent Claim
196 words
A BOOSTER DEVICE WHICH IS DESIGNED TO RECEIVE A BLASTING CAP AND TO HOLD SAID CAP SECURELY THEREIN, SAID DEVICE HAVING IN COMBINATION: (A) AN OUTER METAL SHELL HAVING A CLOSED BOTTOM AND AN OPEN TOP; (B) AN INNER METAL SHELL OF SUFFICIENT LENGTH AND DIAMETER TO ACCOMMODATE A BLASTING CAP AND OF LESS LENGTH THAN THE OUTER SHELL HAVING A CLOSED BOTTOM AND AN OPEN TOP AND BEING COAXIALLY DISPOSED WITHIN SAID OUTER SHELL WITH THE OPEN TOP THEREOF POSITIONED SLIGHTLY BELOW THE TOP OF THE OUTER SHELL; (C) A CHARGE OF CAP-SENSITIVE EXPLOSIVE DISPOSED WITHIN THE ANNULAR AND BOTTOM SPACE BETWEEN THE OUTER SHELL AND THE INNER SHELL TO ADJACENT THE TOP THEREOF; (D) A RESILIENT SEALING MEMBER DISPOSED OVER THE CHARGE AND BETWEEN THE INNER SHELL AND THE OUTER SHELL TO THE TOP THEREOF, SAID RESILIENT SEALING MEMBER HAVING AN OVERHANGING LIP IN THE TOP THEREOF WITH A CENTRAL OPENING OF LESS DIAMETER THAN THE INNER SHELL AND HAVING A RUPTURABLE MEMBRANE BENEATH THE OVERHANGING LIP, SAID MEMBRANE EXTENDING OVER THE TOP OF THE INNER SHELL; AND (E) A CRIMP FORMED ADJACENT THE TOP OF THE OUTER SHELL TO COMPRESS THE SEALING MEMBER.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |