Projectile, especially for hand firearms and automatic pistols

• US 4,245,557 A
• Filed: 07/06/1976
• Issued: 01/20/1981
• Est. Priority Date: 07/05/1975
• Status: Expired due to Term

• Current Assignee: Dynamit Nobel AG
• Original Assignee: Dynamit Nobel AG
• Inventors: Knappworst, Jurgen, Gawlick, Heinz, Brieger, Helmut
• Primary Examiner(s): Jordan, Charles T.
• Application Number:
  US05/702,898
• Time in Patent Office: 1,659 Days
• Field of Search: 102/91, 102/92.2, 102/92.3, 102/92.4
• US Class Current: 102/508
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type

Abstract

A projectile, especially for hand firearms and automatic pistols, including a core member formed of a first material and provided with a blind bore extending in the forward direction into an outwardly inclined truncated cone surface indentation in the core member. A projectile insert member formed of a second material which is more difficult to deform than the first material, contacts the core member along the outwardly inclined truncated cone surface thereof and is provided with a lug portion extending into said blind bore of the core member for detachably joining said insert member and said core member. A jacket member encompasses the rear portion of said core member and extends forwardly at least up to a zone of the core member surrounding said blind bore. The jacket member has a front edge portion which terminates at a spacing from the forward edge portion of the core member so as to provide an unjacketed strip portion of the core member thereat.

Claims

1. A projectile for hand firearms and automatic pistols comprising a projectile core member formed of a first material and provided with a blind bore extending in the forward direction of the projectile into an outwardly inclined truncated cone surface indentation in said core member, a projectile insert member formed of a second material which is more difficult to deform than said first material, said insert member including a portion contacting said core member along the outwardly inclined truncated cone surface thereof and a lug portion extending from said contacting portion toward the rear of said core member into said blind bore of said core member for detachably joining said insert member and said core member, a jacket member encompassing the rear portion of said core member and extending forwardly at least up to a zone of said core member surrounding said blind bore, said jacket member having a front edge portion terminating at a spacing from the forward edge portion of said core member so as to provide an unjacketed strip portion of said core member thereat, said jacket member having the front edge portion thereof extending forwardly into a zone of said core member surrounding said truncated zone surface indentation, said core member being formed of a lead-weighted plastically deformable synthetic resin, and said insert member being formed of an impact-resistant plastic.

2. A projectile according to claim 1, wherein said lug portion of said insert member is conically widened toward the rear of said core member, said core member being pressed in the forward zone thereof against said lug portion of said insert member for enabling the detachable joining of said insert member and said core member exclusively by way of the conically widened lug portion.

3. A projectile according to claim 2, wherein the conically widened lug portion of said insert member facilitates the sliding movement of said core member along said lug portion upon at least one of impingement and penetration of the projectile on a target.

4. A projectile according to claim 3, wherein said blind bore is conically widened toward the rear at least in the zone encompassing the conically widened lug portion.

5. A projectile for hand firearms and automatic pistols comprising a projectile core member formed of a first material and provided with a blind bore extending in the forward direction of the projectile into an outwardly inclined truncated cone surface indentation in said core member, a projectile insert member formed of a second material which is more difficult to deform than said first material, said insert member including a portion contacting said core member along the outwardly inclined truncated cone surface thereof and a lug portion extending from said contacting portion toward the rear of said core member into said blind bore of said core member for detachably joining said insert member and said core member, a jacket member encompassing the rear portion of said core member and extending forwardly at least up to a zone of said core member surrounding said blind bore, said jacket member having a front edge portion terminating at a spacing from the forward edge portion of said core member so as to provide an unjacketed strip portion of said core member thereat, said lug portion of said insert member being conically widened toward the rear of said core member, said core member being pressed in the forward zone thereof against said lug portion of said insert member for enabling the detachable joining of said insert member and said core member exclusively by way of the conically widened lug portion.

6. A projectile according to claim 5, wherein an end face of said front edge portion of said jacket member contacts a continuous shoulder portion of said core member in such a manner that the jacket surface of said jacket member passes over without interruption into the external surface of said core member at the unjacketed strip portion thereof.

7. A projectile according to claim 5, wherein said jacket member has the front edge portion thereof extending forwardly into a zone of said core member surrounding said truncated cone surface indentation.

8. A projectile according to claim 5, wherein said core member is an elongated member having a longitudinally extending axis, said blind bore being arranged along the axis of said core member, and said unjacketed strip portion of said core member being an annular strip portion.

9. A projectile according to claim 5, wherein said insert member completely covers said truncated zone surface indentation of said core member, said lug portion of said insert member having the rear edge thereof spaced from the rear end of said blind bore.

10. A projectile according to claim 5, wherein said jacket member is provided at least in the forward portion thereof with longitudinally extending deformation means uniformly distributed about the circumference thereof.

11. A projectile according to claim 10, wherein said deformation means includes at least one of grooves and notches, said deformaton means extending in the forward portion of said jacket member no greater than half the longitudinal extent of said jacket member.

12. A projectile according to claim 5, wherein said core member is formed of a material of one of lead, lead alloy, and lead-weighted plastically deformable synthetic resin, and said insert member is formed of one of soft steel, brass, and an impact-resistant plastic.

13. A projectile according to claim 5, wherein said insert member has the forward portion thereof forming the tip of the projectile in the form of a spherical segment, said unjacketed surface portion of said core member being constructed so as to pass over without interruption into the outer surface of said insert member.

14. A projectile according to claim 5, wherein said insert member causes deformation of said blind bore and said core member in response to impingement upon a target such that said insert member becomes detached from said core member.

15. A projectile according to claim 5, wherein the forward termination of the outwardly inclined truncated cone surface identation in said core member delimits the forward edge of said core member.

16. A projectile according to claim 5, wherein the conically widened lug portion of said insert member facilitates the sliding movement of said core member along said lug portion upon at least one of impingement and penetration of the projectile on a target.

17. A projectile according to claim 16, wherein said blind bore is conically widened toward the rear at least in the zone encompassing the conically widened lug portion.