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1、UnitedStatesPatent4,109,576EckelsAugust29,1978ShapedchargewithenhancedpenetrationAbstractAdiverging,smoothwallstand-offforanexplosiveshapedchargealignsgeneratedgasesintosmoothflowenhancingoftheformedjetsubstantiallyincreasingthejetlengtheffectively,thejetpenetration,increasingthecleanlinessofthedeve
2、lopedhole,andthelike.Theshapeofthestand-offtoproducetheenhancementisafrusto-conicaltubulardevice,andpreferablyextendsfromabout13.degree.includedclosingangleatabout1.5conicalcavitydiameterstoabout30.degree.includedclosingangleatabout0.6conicalcavitydiameters.Thebaseoffrusto-conicalstand-offcoincidesw
3、iththebaseofthecavityoftheshapedchargeandthesmallendofthestand-offhasanareaofabouttwo-thirdsofthebase.Asmallrangeoneithersideoftheoptiumorpreferredfrusto-conicalstand-offprovidesahighlyeffectiveenhancementfortheshapedcharge.Inventors:Eckels;RobertE.(2101Youngfield,Golden,CO80401)Appl.No.:726732Filed
4、:September27,1976CurrentU.S.Class:102/307;102/331Intern'lClass:F42B003/08FieldofSearch:102/20,24HC,56SCReferencesCited[ReferencedBy]U.S.PatentDocuments2628559Feb.,1953Jasse102/24.2960930Nov.,1960Bell102/24.2980018Apr.,1961Turechek102/24.3348482Oct.,1967Keeneretal.102/24.3732817May.,1973Thomanek102/2
5、4.3777663Dec.,1973Brown102/24.3894489Jul.,1975Riedletal.102/24.ForeignPatentDocuments618618Feb.,1949GB102/24.PrimaryExaminer:Pendegrass;VerlinR.Attorney,AgentorFirm:Law;RichardD.ParentCaseTextThisapplicationisacontinuation-in-partofmycopendingapplicationSer.No.587,911,filedJune18,1975forEXPLOSIVESHA
6、PEDCHARGE,andnowabandoned.ClaimsWhatisclaimedis:1.Ashapedexplosivechargeenhancementandstand-offstructureinwhichtheshapedchargehasaconeontheorderofabout60.degree.,comprisingincombinationwithahousingfortheexplosivehavingtheconelined.(a)afrusto-conicalrigidstructurehavingitssmallendabouttwo-thirdsofthe
7、diameterofthebaseoftheconeandperpendiculartothelongitudinalaxisofthecone,anditslargerendaboutthesameareaasthebaseoftheconeandperpendiculartothelongitudinalaxisoftheconeandarrangedtoregisterwiththebase
