Case ejecting device for a large-caliber barrel weapon

Details Case ejecting device for a large-caliber barrel weapon Case ejecting device for a large-caliber barrel weapon

1999-09-22

2001-07-17

Jordan, Charles T. (Department: 3641)

Firearms

Breech loading

Sliding breechblock

Reexamination Certificate

active

06260297

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATION
This application claims the priority of German Application No. 198 43 294.1 filed Sep. 22, 1998, which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
This invention relates to a weapon which includes a large-caliber barrel, a breech ring affixed to the barrel at the breech end thereof and at least one catching and ejecting device for immobilizing and extracting rimless cartridge cases.
A weapon of the above-outlined type is disclosed, for example, in German Patent No. 41 33 618 to which corresponds U.S. Pat. No. 5,307,724. The weapon described therein has two oppositely located catching and ejecting devices each having an ejector which is linearly displaceable parallel to the barrel axis and which has an extractor claw. The two ejectors have openings into which extend pivotal ejector levers so that upon pivoting the ejector lever a linear displacement of the ejector results. Further, the weapon barrel has on its end oriented towards the breech ring, two locking pockets into which the extractor claws, extending into the ejector groove of the cartridge case, are pressed after completion of the cartridge feed to prevent the cartridge bottom from being pushed into the propellant chamber of the barrel.
It is, among others, a disadvantage of the above-outlined conventional weapon that during the cartridge feed the extractor claws glide on the cartridge case until they fall into the extractor groove of the cartridge case. Such an occurrence may damage the cartridge case particularly if it is made of a thin, combustible material.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved large-caliber weapon of the above-outlined type in which a damaging of the cartridge case by the catching and ejecting mechanism is securely avoided.
This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the weapon includes a barrel having a barrel axis and a breech-side end having an end face; a breech ring affixed to the breech-side end; and a catching and ejecting device movable parallel to the barrel axis for immobilizing a rimless cartridge case in and extracting the cartridge case from the barrel. The catching and ejecting device has a pivotally supported ejector; an extractor claw mounted at an end of the ejector and arranged for engaging into an ejector groove of the cartridge case; a spring biasing the ejector for urging the extractor claw generally radially inwardly; and a guide member mounted on an end of the ejector for contacting the cartridge case during cartridge feed into the barrel, whereby the ejector and the extractor claw are pivoted against a force of the spring for maintaining the extractor claw out of contact with the cartridge case. The extractor claw is moved by the force of the spring into the ejector groove of the cartridge case as the guide member runs off and remains behind the cartridge case during cartridge feed. A locking pocket is provided in the end face of the barrel end for receiving a portion of the extractor claw upon completion of the cartridge feed and while the extractor claw engages into the ejector groove of the cartridge case.
Essentially, the invention is based on the principle to mount a guide member, preferably a roller, on the ejector of the catching and ejecting mechanism in such a manner that the guide member, during cartridge feed, rides on the cartridge case and pivots away the ejector against a spring force so that ejector claw remains out of contact with the cartridge case. Upon completion of the cartridge feed, the guide member runs off the cartridge case and the extractor claw is pressed by the spring into the ejector groove of the cartridge case.
The guide members have the further advantage that the cartridge is guided laterally during the loading process (cartridge feed).
According to a preferred embodiment of the invention, to prevent the extraction claw from engaging into the locking pocket of the weapon barrel before completion of the cartridge feed, on the catching and ejecting mechanism a buffer is provided which is formed preferably of a spring-biased pressing rod and which supports the catching and ejecting device axially at the end of the weapon barrel. Further, the buffer dampens the impact of the cartridge as it arrives into the cartridge chamber.


REFERENCES:
patent: 3584532 (1971-06-01), Stoner
patent: 3677133 (1972-07-01), Bushey
patent: 3733729 (1973-05-01), Baker
patent: 3735517 (1973-05-01), De Hass et al.
patent: 4269108 (1981-05-01), Stoner
patent: 4269109 (1981-05-01), Stoner
patent: 4920677 (1990-05-01), Schuerman
patent: 4942802 (1990-07-01), Stoner
patent: 5289755 (1994-03-01), Zielinski et al.
patent: 5307724 (1994-05-01), Breuer et al.
patent: 41 33 618 (1997-02-01), None
patent: 0 089 942 (1983-09-01), None

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