发明名称 Projectile with an extendable boattail
摘要 A projectile having a streamline assembly which includes a frusto-conical saddle secured to the boattail area of the projectile bullet, a carrying cylinder having one end secured to the saddle, with multiple, concentrically oriented, tapered, collapsible rings normally located inside the opposite end of the carrying cylinder and biased against a pressure disk fitted against the opposite end of the carrying cylinder, wherein firing of the projectile causes the pressure disk to tear away from the carrying cylinder and deploy the collapsible rings outwardly of the carrying cylinder and behind the bullet in a "beehive" configuration, to reduce air resistance as the projectile moves through the atmosphere. In a preferred embodiment the pressure disk is pressed against the carrying cylinder by means of a brass screw, the threads of which engage an aperture in the saddle and are stripped from the brass screw to release the disk when the projectile is fired.
申请公布号 US4674706(A) 申请公布日期 1987.06.23
申请号 US19860831603 申请日期 1986.02.21
申请人 HALL, ROBERT C. 发明人 HALL, ROBERT C.
分类号 F42B10/44;(IPC1-7):F42B13/273 主分类号 F42B10/44
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