The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2015
Filed:
Nov. 13, 2013
Ryan Hooke, Bangor, PA (US);
Ryan Hooke, Bangor, PA (US);
The United States of America as Represented by the Secretary of the Army, Washington, DC (US);
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.