Pre-deformed obturator for tube-launched projectile
US8950334B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Nov 13, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B14/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pre-deformed obturator for a projectile launched from a rifled tube includes an annular ring with a forward planar surface normal to the central longitudinal axis of the obturator. A top cylindrical surface extends aft from the forward planar surface and normal to the forward planar surface. A plurality of projections are formed on the top cylindrical surface and are configured to engage the rifling of the tube. An opening is formed in an aft end of each of the plurality of projections for receiving propellant gas. The opening may also be contiguously formed in the aft surface of the obturator radially inward of each projection. Propellant gas enters the openings in the aft of the obturator and expands the obturator to provide an efficient gas seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.