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21. 发明授权

US4674706A Projectile with an extendable boattail 失效
标题翻译：射弹具有可延伸的火焰
公开(公告)号：US4674706A
公开(公告)日：1987-06-23
申请号：US831603
申请日：1986-02-21
申请人： Robert C. Hall
发明人： Robert C. Hall
IPC分类号： F42B10/44 , F42B13/273
CPC分类号： F42B10/44
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.
摘要翻译：具有流线组件的抛射体，其包括固定到射弹子弹头部分的截头圆锥形鞍座，具有固定到鞍座的一端的承载缸，具有通常位于相对端内侧的多个同心取向的锥形可收缩环并且抵靠压靠在承载气缸的相对端的压力盘，其中弹丸的射击导致压力盘从承载气缸撕开并将可收缩的环部展开在承载气缸的外面并且在子弹之后在“蜂巢”配置中，为了在弹丸移动通过大气层时降低空气阻力。在一个优选实施例中，压盘通过黄铜螺钉压靠在承载缸上，黄铜螺钉与螺钉啮合，并且在抛射体被击发时从黄铜螺丝剥离并释放盘。

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