Title:
発射体本体を伴う小火器用又は軽火器用弾丸
Document Type and Number:
Japanese Patent JP6499649
Kind Code:
B2
Abstract:
A projectile (14) for an ammunition round (10) for use with a small arms or light firearm comprises an elongated projectile body (16). The projectile body (16) has first and second axially opposed ends (18, 20) respectively and a cavity (20) extending there between. The cavity is able to hold a quantity of propellant (24). A plurality of seals (26) extend about an outer surface of the body (16). The seals (26) protrude radially from the body (16) and operate to form a substantial seal against an inner circumferential surface of a barrel (12) of the firearm. Two of the seals (26b and 26c) are mutually adjacent and spaced apart in a direction of a longitudinal axis of the body to form a seal bound outer surface portion (36) of the body (16). One or more holes (38) are formed in the body (16) enabling fluid communication between the cavity (22) and the seal bound outer surface portion (36) of the body (16). This enables pressure equalization inside and outside of the cavity (22) about the seal bound outer surface portion (36) when the projectile (14) is travelling through the barrel (12).
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Inventors:
Harrison, Dale
Application Number:
JP2016530269A
Publication Date:
April 10, 2019
Filing Date:
July 25, 2014
Export Citation:
Assignee:
TECHVENTURE INVESTMENTS PTY LTD
International Classes:
F42B10/38; F42B5/28
Domestic Patent References:
| JP200516923A | ||||
| JP2007530908A | ||||
| JP2003130599A |
Foreign References:
| EP0238155A1 | ||||
| US4712465 |
Other References:
P. R. Viswanath, S. R. Patil,“Effectiveness of Passive Devices for Axisymmetric Base Drag Reduction at Mach 2”,Journal of Spacecraft and Rockets,1990年,Vol. 27, No. 3,p. 234-237,https://doi.org/10.2514/3.26130
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Shuji Ouchi
Yasuharu Nakasone
Shiro Sakai
Toshiyuki Miyadera
Shuji Ouchi
Yasuharu Nakasone
Shiro Sakai