Projectile obturator
USH167H · kind H · statutory invention registration
Assignee
Inventors
Key dates
| Filing date | — |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | — |
Classification
- Technology area (CPC —)General
Abstract
An improved multipurpose projectile obturator of composite, frangible conuction where the obturator preferably forms part of a projectile that is launched from an upstanding tube. The tube interior is provided with an alternating series of helically arranged groove and land means. A projectile at its propellant end is provided with an annular shoulder that faces in a direction toward the propellant end. An obturator is generally made up of an elastomeric band of a suitable grade of rubber. The band in being placed about the projectile surface and against the shoulder is positively retained as the projectile is inserted in the tube and launched therefrom. The outer periphery of the band has an annular groove for receiving a ring-like element. This element is preferably of three-ply construction and is also preferably made up of two half sections that are suitably bonded to the groove about the band periphery. The outer ply of the element is provided with a plurality of bristle or wire-like elements for wipingly engaging the series of land means when the projectile is inserted in the tube. Also, each wire-like element of the plurality extends at an oblique angle and in a counterclock…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.