Chevron grooved decoupling obturator Patent #: 4242961
ApplicationNo. 06/388551 filed on 06/15/1982
US Classes:102/527, Nonmetallic102/524, Rifling or driving means (e.g., band)244/3.28Longitudinally rotating
ExaminersPrimary: Jordan, Charles T.
Attorney, Agent or Firm
International ClassesF42B 14/00 (20060101)
F42B 14/02 (20060101)
AbstractA two-piece despin obturator mounted on a forwardly inclined obturator ramp on the projectile sidewall has a ring-shaped body of nylon-6 and a wiper band formed from Plascon nylon. The two-piece design is relatively immune to damage in the handling and loading process but yet the wiper band enhances low pressure sealing while the ring, driven up the inclined ramp in the firing process, engages the lands of the spiraled rifling. The rotational velocity imparted to the ring is partially coupled as the inner surface of the ring rotates on the obturator mount of the projectile.