Patent ID: 8459166
Filing Date: 2013-06-11
Classification: F41A

Abstract:
1. A drum cannon comprising: (a) a drum provided with several chambers, wherein the drum is pivotable around an axis; (b) a barrel; and (c) an elastically pre-tensioned seal provided between the drum and the barrel, wherein the seal comprises a plurality of elastically pre-tensioned obturation rings integrated between the drum chambers and the barrel, wherein when the obturation rings are disposed to press against a face of the barrel or a face of the chamber that is in line with a barrel bore axis of the barrel, wherein each obturation ring has an L-shaped profile, and each obturation ring has arms, and each arm has a lip at an end, and wherein an angle between the arms is greater than 90° when the obturation ring is not pre-tensioned, and when the obturation ring is pre-tensioned, the lip at the end of one arm presses against the face of the barrel so that the seal provides sealing immediately between the drum and the barrel even with low gas pressures.