Patent US4409155A successfully refreshed from Google Patents.
US4409155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive booster manufacture
Assignee: PPG Architectural Coatings Canada Inc
•
Filing: 1980-12-18
•
Granted: 1983-10-11
•
Expires: 2000-12-18
Abstract
Abstract A semi-automatic, semi-continuous method is provided for the manufacture of cast explosive boosters. The method makes us of a mold assembly which is transported through filling, cooling and disassembly stations in a substantially continuous manner with little or no manual intervention. The method is adaptable to the manufacture of sheath/core or multiple layer boosters employing two explosives of different sensitivities. The method results in reduced operating costs and improved safety.
Inventors
- 👤 Joseph R. Bonnycastle
- 👤 Alfred G. Michaud
- 👤 Edward K. Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:56
CPC Classifications
F; F42; F42B; F42B33/00; F42B33/02; F42B33/0214; C; C06; C06B; C06B21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A semi-automatic, semi-continuous method for manufacturing a cast high explosive booster which comprises the consecutive steps of: (a) preparing an assembly consisting of a base plate, a tubular shell removably secured to said base plate and one or more operative pins removably secured to said base plate within the confines of said tubular shell; (b) advancing said assembly to an inspection and indexing station where leakproof mounting of the said tubular shell on the said base plate is provided; (c) advancing the said assembly to a molten explosives dispensing station; (d) filling the said tubular shell with molten explosives; (e) advancing the said assembly and filled tubular shell to a cooling station; (f) advancing the said cooled tubular shell and assembly to a disassembly station where the said pins and the said base plate are separated from the said filled tubular shell; and (g) advancing the said filled, cooled shell to a packaging station.
Claim 2
Dependent Claim
154 words
A semi-automatic, semi-continuous method for manufacturing a cast high explosive booster which comprises the consecutive steps of: (a) preparing an assembly consisting of a base plate, a tubular shell removably secured to said base plate and one or more operative pins removably secured to said base plate within the confines of said tubular shell; (b) advancing said assembly to an inspection and indexing station where leakproof mounting of the said tubular shell on the said base plate is provided; (c) advancing the said assembly to a molten explosives dispensing station; (d) filling the said tubular shell with molten explosives; (e) advancing the said assembly and filled tubular shell to a cooling station; (f) advancing the said cooled tubular shell and assembly to a disassembly station where the said pins and the said base plate are separated from the said filled tubular shell; and (g) advancing the said filled, cooled shell to a packaging station.
Claim 3
Dependent Claim
42 words
A method as claimed in claim 1 wherein the molten explosive filling step (d) comprises a first and second pour of explosive, the said second pour of explosive comprising an explosive more sensitive to initiation than the said first pour of explosive.
Claim 4
Dependent Claim
262 words
A semi-automatic, semi-continuous method for manufacturing a cast high explosive booster which comprises the consecutive steps of: (a) preparing an assembly consisting of a base plate, a tubular shell removably secured to said base plate, one or more operative pins removably secured to said base plate within the confines of said tubular shell and a core mold piece affixed to said removable pins, said core mold piece adapted to occupy space around the said pins and within the confines of said tubular shell; (b) advancing said assembly to an inspection and indexing station where leakproof mounting of the said tubular shell on the said base plate is provided; (c) advancing the said assembly to a first molten explosive dispensing station; (d) filling the said tubular shell with a first molten explosives; (e) advancing the said assembly and filled tubular shell to a first cooling station; (f) separating the said core mold piece from the said pins and the said filled and cooled tubular shell to create a void space in the said filled shell around the said pins; (g) advancing the said void-containing filled shell to a second molten explosives dispensing station; (h) filling the said void space in the said shell with said second molten explosives; (i) advancing the said assembly and filled shell to a second cooling station; (j) advancing the said cooled tubular shell and assembly to a disassembly station where the said pins and the said base plate are separated from the said filled tubular shell; and (k) advancing the said filled, cooled shell to a packaging station.
Claim 5
Dependent Claim
262 words
A semi-automatic, semi-continuous method for manufacturing a cast high explosive booster which comprises the consecutive steps of: (a) preparing an assembly consisting of a base plate, a tubular shell removably secured to said base plate, one or more operative pins removably secured to said base plate within the confines of said tubular shell and a core mold piece affixed to said removable pins, said core mold piece adapted to occupy space around the said pins and within the confines of said tubular shell; (b) advancing said assembly to an inspection and indexing station where leakproof mounting of the said tubular shell on the said base plate is provided; (c) advancing the said assembly to a first molten explosive dispensing station; (d) filling the said tubular shell with a first molten explosives; (e) advancing the said assembly and filled tubular shell to a first cooling station; (f) separating the said core mold piece from the said pins and the said filled and cooled tubular shell to create a void space in the said filled shell around the said pins; (g) advancing the said void-containing filled shell to a second molten explosives dispensing station; (h) filling the said void space in the said shell with said second molten explosives; (i) advancing the said assembly and filled shell to a second cooling station; (j) advancing the said cooled tubular shell and assembly to a disassembly station where the said pins and the said base plate are separated from the said filled tubular shell; and (k) advancing the said filled, cooled shell to a packaging station.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 3 wherein the said second molten explosives comprises a material more sensitive to initiation than the said first molten explosives.
Claim 7
Dependent Claim
33 words
A method as claimed in claim 2 or 4 wherein the melt temperature of the more sensitive second molten explosives is in excess of the melt temperature of the said first molten explosives.
References Cited (Backward Citations)
US3379796A
Cited
US2995011A
Cited
US4085173A
Cited
US3345438A
Cited
US3926697A
Cited
US4014963A
Cited
US3961554A
Cited
US4050347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |