(19)
(11) EP 0 172 549 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.02.1987 Bulletin 1987/09

(43) Date of publication A2:
26.02.1986 Bulletin 1986/09

(21) Application number: 85110348

(22) Date of filing: 19.08.1985
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 21.08.1984 US 642785

(71) Applicant: D.C. BRENNAN FIREARMS, INC.
 ()

(72) Inventors:
  • Hawley, Mark R.
     ()
  • Brennan, Dean C.
     ()

   


(54) Smooth bore muzzle device


(57) The inventive device is composed of a device with a specifically shaped inner bore which is mounted on or integral with barrel (2) of a firearm so that the axis of the inner bore and the axis of the barrel are co-linear. The inner bore of the device is composed of two sections, seen in direction of propagation of the projectile:

(a) a reverse taper (12) which appears to the powder gases as an abrupt expansion around the projectile followed by

(b) a smooth bore section (13) whose diameter is equal to or less than the projectile diameter.






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