Bottom plate member

Details Bottom plate member Bottom plate member

F - Mech Eng,Light,Heat,Weapons

42

B

F42B 5/05 (2006.01) F17C 13/06 (2006.01) F41A 1/08 (2006.01)

Patent

CA 2217528

The invention relates to a bottom plate member (6) which is designed and made for initially tightening a chamber in which a high gas pressure is generated, for example the propellant charge chamber (4) in an ammuniton round for a recoilless weapon system or in pipes or containers within the process industry. The plate member (6) is breakable and opens for the gases to exit when the gas pressure within the chamber exceeds a certain level. The plate member has a through hole (12) in the center which gives an effective starting point for the cracking process as well as fractural impressions (10) to control the cracking process so that the plate is divided into a number of well defined parts of flaps (11) which are connected to each other. The plate member (6) further comprises a number of straight edges (16), which number corresponds to the number of flaps (11), against which edges the base of the flaps are arranged to be folded when the plate member opens due to the gas pressure.

La présente invention concerne une plaque de fond (6) conçue pour réduire dans un premier temps le volume d'une chambre où est générée une forte pression de gaz, par exemple la chambre de charge propulsive (4) dans le logement à munitions d'un système d'arme sans recul, ou dans des canalisations ou des conteneurs de l'industrie de transformation. La plaque (6) est cassable et s'ouvre pour permettre aux gaz de s'échapper lorsque la pression des gaz à l'intérieur de la chambre dépasse un certain niveau. La plaque présente en son centre un trou traversant (12) qui offre au processus de craquage un point de départ efficace. Elle présente aussi des impressions de fracturation (10) permettant de contrôler ce processus. La plaque est donc fractionnée en un certain nombre de parties ou de volets (11), tous reliés entre eux. Elle comprend, en outre, un certain nombre de bords droits (16) qui correspond au nombre de volets (11), bords contre lesquels les volets sont disposés pliables en leur partie inférieure lorsque la plaque s'ouvre sous l'effet de la pression des gaz.

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