| 摘要 |
A rotary breech apparatus for an automatic weapon of the open chamber type in which the open chamber of the breech rotates past a feeding station to receive a round for firing, then rotates to an ejecting station where the spent round is ejected. A chamber closure mounted next to the breech rotates in the opposite direction about a closure axis which is parallel to the breech axis. The chamber closure includes a surface portion which repetitively closes and seals the open chamber of the breech during the continuous rotation of the breech and the chamber closure. The breech axis is aligned or coaxial with the bore axis of the barrel, and consequently rotation of the breech does not have to be stopped when the round is fired to be assured of perfect alignment.
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