Ammunition and explosives – Igniting devices and systems
Reexamination Certificate
2009-05-28
2011-12-27
Hayes, Bret (Department: 3641)
Ammunition and explosives
Igniting devices and systems
Reexamination Certificate
active
08082844
ABSTRACT:
An acoustic crystal explosive, which gains its properties from both its periodic structure and its composition, may be configured to suppress or enhance the sensitivity of detonation of the explosive in response to an acoustic wave. An explosive material and a medium (explosive or inactive) are arranged in a periodic array that provides local contrast modulation of the acoustic index to define a band gap in the acoustic transmission spectrum of the explosive materials. At least one defect cavity in the periodic array creates a resonance in the band gap. The defect cavity concentrates energy from an incident acoustic (shock) wave to detonate the explosive. Multiple defect cavities may be configured to provide a desired shaped charge or volumetric detonations. Means may be provided to reprogram the defect cavity(ies) to reconfigure the explosive.
REFERENCES:
patent: 4145972 (1979-03-01), Menz
patent: 4325304 (1982-04-01), Ormiston
patent: 4475461 (1984-10-01), Durrell
patent: 4899663 (1990-02-01), Thorn
patent: 4976199 (1990-12-01), Beukes et al.
patent: 5182418 (1993-01-01), Talley
patent: 5375527 (1994-12-01), Nakajima
patent: 5388521 (1995-02-01), Coursen
patent: 6744552 (2004-06-01), Scalora
patent: 6809856 (2004-10-01), Reed
patent: 7078697 (2006-07-01), Barker
patent: 7079308 (2006-07-01), Reed
patent: 7116458 (2006-10-01), Reed
patent: 7257333 (2007-08-01), Rosenwald
patent: 7292740 (2007-11-01), Barker et al.
patent: 7418373 (2008-08-01), Heck, Sr.
patent: 7886667 (2011-02-01), Baker et al.
patent: 2003/0183109 (2003-10-01), Rudhard et al.
patent: 2005/0016407 (2005-01-01), Bernard
patent: 2008/0282925 (2008-11-01), Lownds et al.
Florian Beil “Shock waves in nanomechanical Resonators” Cond-mat.mes-hall Aug. 14, 2007.
Veronica Eliasson “On focusing of shock waves” Technical Reports from Royal Institutre of Technology Sep. 2007.
Benjamin Hooberman “Everything you ever wanted to know about frequency-selective surface filters but were afraid to ask” May 2005.
C. Lopez “Materials Aspects of Photonic Crystals” Advanced Materials 15, 1679 (2003).
Zhi-Yuan Li “Modified thermal radiation in three-dimension photonic crystals” Phys. Rev. B 66, R241103 (2002).
Shawn-Yu Lin “Enhancement and suppression of thermal emission by a three-dimensional photonic crystal” Phys. Rev. B. 62, R2243 (2000).
E.J. Reed “Color of shock waves in photonic crystals” Physical Review Letters 90, 203904 (2003a).
E.J. Reed “Reversed Doppler Effect in Photonic Crystals” Physical Review Letters 91, 133901 (2003b).
Barker Delmar L.
Moore Kenneth L.
Owens William R.
Gifford Eric A.
Hayes Bret
Raytheon Company
Tillman, Jr. Reginald
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