US 10,788,298 B2Granted

Bullet with increased effective range

AssigneeDuretek Inc.

InventorsJunkyu Kim, Hyungse Kim

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Abstract

The present invention relates to a bullet with an increased effective range. The bullet includes a front end portion (10) having a hemispherical shape, a recess portion (20) connected to a rear end of the front end portion (10) and having a curved surface that is recessed inward, an inclined portion (30) connected to a rear end of the recess portion (20) and inclined at a predetermined angle (A) with respect to a horizontal line, a stepped portion (40) connected to a rear end of the inclined portion (30) and inclined at a predetermined angle (A′) with respect to the horizontal line, and fluid inducing grooves formed from the rear to a rear end surface of the bullet (1). Thus, when the bullet passes through underwater, super cavitation may be more effectively generated and maintained for even longer to significantly increase the effective range of the bullet.

Claims6

Dependent claims

A bullet with an increased effective range, which has a streamlined shape on the whole and is shot into air or underwater to strike a target, the bullet comprising:

a front end portion having a hemispherical shape;
a recess portion connected to a rear end of the front end portion and having a curved surface that is recessed inward;
an inclined portion connected to a rear end of the recess portion and inclined outwardly at a predetermined angle with respect to a horizontal line;
a stepped portion connected directly to a rear end of the inclined portion and inclined outwardly at a predetermined angle with respect to the horizontal line;
a streamlined portion connected to a rear end of the stepped portion and having an outwardly protruding surface extended at the rear end of the stepped portion;
and a tail portion connected to the streamlined portion and having an outer surface and a rear surface;
wherein the tail portion has fluid inducing grooves formed from the rear surface to the outer surface of the tail portion, and the angle of the stepped portion is greater than that of the inclined portion.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/091,041Filed 12 Apr 2017
Priority: KR 10-2016-01459673 Nov 2016
Published: US 2019/0277609 A112 Sep 2019
Granted: 29 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F42B 10/46
Streamlined projectiles: streamlined nose cones; Windshields; Radomes
F42B 15/22
Self-propelled projectiles or missiles, e.g. rockets; Guided missiles: missiles having a trajectory finishing below water surface
F15D 1/003
Using passive means, i.e. without external energy supply: comprising surface features, e.g. indentations or protrusions
F42B 10/38
Range-reducing or range-increasing arrangements; Fall-retarding means: range-increasing arrangements