Spinning shot gun projectile

• US 4,063,511 A
• Filed: 07/21/1976
• Issued: 12/20/1977
• Est. Priority Date: 07/21/1976
• Status: Expired due to Term

• Current Assignee: James M. Bullard
• Original Assignee: James M. Bullard
• Inventors: Bullard, James M.
• Primary Examiner(s): Jordan, Charles T.
• Application Number:
  US05/707,363
• Time in Patent Office: 517 Days
• Field of Search: 244/3.23, 102/92.1-92.4, 102/95, 102/38
• US Class Current: 102/436
• CPC Class Codes: F42B 10/22 Projectiles of cannelured type
• CPC Class Codes: F42B 10/26 using spin F42B10/04, F42B10/12, F42B10/14, F42B10/24, F42B14/02 take precedence
• CPC Class Codes: F42B 7/10 Ball or slug shotgun cartridges

Abstract

A spinning shot gun projectile comprises a cylindrical body having radially projecting vanes arranged with respect to the longitudinal axis of the body at an angle predetermined for air impingement during the flight of the projectile, thereby imparting a spinning motion to the same and insuring an accurate trajectory. The rearward portion of the projectile body has an axial bore dimensioned to receive in bearing engagement the ram portion of wad means located forwardly of the powder. The thrust of the explosion thus is transmitted to the projectile centrally and forwardly of the same by the action of the ram, thereby further insuring true flight of the projectile.

Claims

1. For use in a shot gun shell comprising a hollow cylindrical case open at its forward end and closed at its rearward end, a propellant in the rearward portion of the case, and a primer mounted in the closed rearward end of the case, a projectile assembly comprising:

a. wad means in the case forwardly of the propellant for retaining the latter in the case, the wad means including a rearward cylindrical body portion arranged to fit snugly within the case for retaining the propellant therein and an integral forward ram portion coaxial with but of smaller diameter than the body portion and extending forwardly therefrom,

b. a cylindrical projectile body dimensioned for insertion in the case forwardly of the body portion of the wad means, the projectile body having an axial bore extending forwardly from its rearward end and dimensioned to received the ram portion of the wad means freely therein, the bore having a length slightly less than the length of the ram portion of the wad means whereby to space the rearward end of the projectile body slightly forward of the forward end of the body portion of the wad means and to abut the forward end of the ram portion of the wad means against the inner end of the bore, and

c. a plurality of circumferentially spaced, radially extending spinner vanes on the exterior surface of the projectile body arranged with respect to the longitudinal axis of the projectile body at an angle predetermined to impart a spinning motion to the projectile body during its flight by impingement of air on said vanes.

2. The projectile assembly of claim 1 wherein a rearward end portion of the projectile body is of reduced diameter to expose a forward transverse surface of the body portion of the wad means to the impingement of air during flight, whereby to effect separation of the wad means from the projectile body after it has left a gun barrel.

3. The projectile assembly of claim 1 wherein the projectile body has a forward nose portion of progressively decreasing diameter, and the vanes extend substantially the full length of the projectile body rearwardly from adjacent the rearward end of the nose portion.

4. The projectile assembly of claim 1 wherein the projectile body includes a heavy metal core provided with at least one annular groove intermediate the ends of its outer surface, and a plastic sleeve overlying the core and including an annular extension on its inner surface seated in the annular groove for securing the sleeve to the core, the vanes being integral with the sleeve.