Claims
- 1. A cap used in blasting for a modular blasting system comprising:
- (a) a wall defining a volume closed at the first end and open at the second end;
- (b) an explosive element at the first end of said wall defining a volume;
- (c) a blow-back preventing chamber comprising a cup with a closed bottom end and open top end, said bottom end in close proximity to said explosive element, said closed bottom end penetrated by a detonation transmission passageway, permitting a detonation signal to be transmitted to said explosive charge received from said second end, but preventing the transmission of a detonation signal resulting from accidental discharge of said explosive element from being transferred to said second end of the wall defining said volume, and
- (d) a receiving cup adjacent to said blow-back preventing chamber.
- 2. The cap used in blasting of claim 1 further comprises a void space between said explosive element and said blow-back preventing chamber.
- 3. The cap used in blasting for a modular blasting system comprising:
- (a) a wall defining a cylindrical volume with a first and second end, said first end being closed, said second end being open;
- (b) an explosive element at the first end of said wall;
- (c) a blow-back preventing chamber in close proximity to said explosive element, said chamber comprising at least one cup element, said cup element having a closed bottom end with a central passageway and an open receiving end;
- (d) means to engage a signal transmission line within the second end of said wall; and
- (e) a receiving cup comprising a closed bottom end with a central passageway and an open receiving end, said closed bottom end adjacent to said open receiving end of the blow-back preventing chamber.
- 4. The cap used in blasting of claim 3 wherein said wall further comprises a striker pin extending from said closed first end.
- 5. The cap used in blasting of claim 3 wherein said wall further comprises a first end of 0.004 to 0.008 inches in width.
- 6. The cap used in blasting of claim 3 wherein said wall further comprises a material with a thickness of 0.038 inches.
- 7. The cap used in blasting of claim 3 wherein said wall is comprised of a composite of 95% copper and 5% zinc.
- 8. The cap used in blasting of claim 3 wherein said explosive element is comprised of at least 40 milligrams of diazodinitrophenol.
- 9. The cap used in blasting of claim 3 further comprises a void space between said explosive element and said blow-back preventing chamber.
- 10. The cap used in blasting of claim 3 wherein said means to engage a signal transmission line comprises a portion of said wall of reduced thickness adjacent said second end.
- 11. The cap used in blasting of claim 10 wherein said means to engage further comprises a portion of said wall adjacent said second end capable of crimped engagement with said signal transmission line.
- 12. The cap used in blasting of claim 10 wherein said means to engage further comprises a sealing sleeve operably attached within said wall adjacent said second end.
- 13. The cap used in blasting of claim 3 wherein said means to engage further comprises a sealing sleeve to provide a gasket seal between said wall and said signal transmission line.
- 14. The cap used in blasting of claim 3 wherein said explosive element is further comprised of between 15% and 35% clay.
- 15. The explosive element of claim 14 wherein said clay is bentonite.
- 16. A cap used in blasting for a modular blasting system comprising:
- (a) a wall defining a cylindrical volume with a first and second end, said first end being closed, said second end being open;
- (b) an explosive element at said first end of said wall;
- (c) a blow-back preventing chamber in close proximity to said explosive charge comprising at least one cup element, said cup element having a closed bottom end;
- (d) a receiving cup comprising a closed bottom end with a central passageway and an open receiving end, said closed bottom end adjacent to said open receiving end of the blow-back preventing chamber;
- (e) means to engage a signal transmission line within the second end of said wall; and
- (f) a striker pin extending from said closed first end of said wall defining a cylindrical volume.
- 17. A cap used in blasting for a modular blasting system comprising:
- (a) a wall defining a cylindrical volume with a first and second end, said first end being closed, said second end being open;
- (b) an explosive element at said first end of said wall;
- (c) a blow-back preventing chamber comprises at least one cup element, said cup element having a closed bottom end with a central passageway and an open receiving end in close proximity to said explosive charge which only permits a detonation signal within said wall to be transmitted to said explosive charge;
- (d) a receiving cup comprising a closed bottom end with a central passageway and an open receiving end, said closed bottom end adjacent to said open receiving end of the blow-back preventing chamber;
- (e) means to engage a signal transmission line within the second end of said wall; and
- (f) a length of signal transmission line operably engaging said open second end of said wall defining a cylindrical volume.
Parent Case Info
This is a division of U.S. patent application Ser. No. 507,739, filed Apr. 12, 1990.
US Referenced Citations (40)
Divisions (1)
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Number |
Date |
Country |
Parent |
507739 |
Apr 1990 |
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