US3710494A - Ejector mechanism for breakdown firearms - Google Patents

Abstract

A cartridge case ejector of a breakdown firearm has an oblong guiding groove on the side of the body of the firearm. The ejector has an oblong and flexible stem with a prong at its rear end which is adapted to engage the base of the cartridge case. The guiding groove has shoulder grooves adjacent the base of the cartridge. The stem has guiding shoulders adjacent the prong which are adapted to move in the shoulder grooves. The front end of the stem carries a pin adapted to engage a depression provided on the side of the guiding groove opposite the cartridge case base.

Description

United States Patent 1 1 Hyytinen 1 1 Jan. 16, 1973 [54] EJECTOR MECHANISM FOR 1,525 6/1865 Lancaster 542/46 BREAKDOWN FIREARMS Primary Examiner-Benjamin A. Borchelt [75] Inventor. Tlmo Hyytmen, Jivasklya, Fmland Assistant Examiner D. A Bent [73] Assignee: Valmet 0y, Helsinki, Finland Att ey-Richards & Geier 2 Fl cl: M h 197 [2 1 1 57 ABSTRACT 21 A LN 124250 PP 0 A cartridge case ejector of a breakdown firearm has an oblong guiding groove on the side of the body of [52] US. Cl ..42/47 th fir am The eje tor has an oblong and flexible Cl stem with a prong at its rear end which is adapted to [58] Field of Search ..42/47, 46, 40 engage th b f th a trid case. The guiding groove has shoulder grooves adjacent the base of the References Clted cartridge. The stem has guiding shoulders adjacent the prong which are adapted to move in the shoulder UNITED STATES PATENTS grooves. The front end of the stem carries a pin 2,952,933 9/1960 Stevens ..42/46 X adapted to engage a depression provided on the side 3,142,125 7/1964 Groovern of the guiding groove opposite the cartridge case base. 2,108,130 2/1938 Lewis .42/47 1,530,041 3/1925 Fearn 42/47 2 Claims, 4 Drawing Figures PATENTEDJAH 16 I975 SHEET 1 OF 2 @aaaaaaa The present invention concerns ejector expulsor construction in a fire arm to be opened by breaking, in particular a hunting fire arm, in which the ejector part is movable in its groove and which also has a triggering step and a limit stop determining the extreme position of the ejecting motion.

As a rule, the retaining of such ejectors consisting of one piece in their groove has been ensured by means of shoulders extending substantially over the entire length of the ejector stem and shoulder grooves in the body of the fire arm on the sides of the groove.

In order that in the design just described the stem of the ejector might be insertable in its action groove, the limiting pin for the ejection motion is arranged to be fixed in its place only after the stem has been pushed into its groove. Therefore the limiting pin could not be made integral with the stem and it has usually been a separate threaded pin or limiting screw.

The object of the present invention is to replace the threaded-pin or limiting screw, which detracts from the strength of the ejector construction and is not securely maintained in its place, by an integral pin, which is reliable in operation, and at the same time to retain the integral guiding shoulders which keep the ejector stem in its groove.

The above advantages are gained by a design which is mainly characterized in that the guiding shoulders beginning at the end of the ejector stem adjacent to the cartridge base and fitting into the guiding shoulder grooves made in the body of the fire arm extend only over part of the length of the stem and that the tolerances of the grooves and shoulders and the rigidity with regard to bending of the ejector stern have been chosen to be such that the ejector can be mounted in its position by pushing the stem into its groove despite the fact that the ejector stem has been provided with an integral limiting pin, which is preferably of the same material as the stem. The invention is described below in greater detail with reference to the embodiment shown in the attached drawing, without any prejudice as to the scope of the invention.

F IG. 1 shows the ejector construction in elevational view, partly sectioned, when the ejector is in the operable position. I

FIG. 2 shows the section along line IIII in FIG. 1.

FIG. 3 shows the same section as FIG. 2, with the ejector in its released position.

FIG. 4 shows the insertion and dismounting of the ejector.

When the ejector has been assembled and is in its normal position for triggering, its ejection motion is guided by the integral guiding shoulders 3 of the stem 1 on the end adjacent to the base, which move in guiding shoulder grooves 6 in the body 5. The guiding shoulders absorb forces in the direction of arrow F caused by the cartridge shell when this is ejected.

When the ejector is released by a releasing mechanism previously known in itself from the position of FIG. 2 into that of FIG. 3, the integral limiting pin 2 stops the ejection motion at an extreme position determined by the rim of the groove 8 of the pin 2. The end of the stem 1 of the ejector on which the guiding pin 2 is mounted is maintained in its place ensured by the breech frame, which extends up to the line BB in FIG. 1, when the fire arm is assembled. Furthermore, maintenance of the stem 1 in its groove when the ejector is not in contact with the breech frame is ensured by the protective plate 4, the end of which enters a slit made in the body 5 by milling. If, when the ejector is not in contact with the breech frame, the ejector is triggered, which is a rare occurrence, the protective plate 4 prevents the end of the ejector stem with the pin 2 from rising out of its groove. The protective plate 4 also protects the triggering mechanism of the ejector.

Disassembly of the ejector, which is illustrated by FIG. 4, is effected in that the protective plate 4 is detached and the end of the ejector stem 1 carrying the pin 2 is raised, while the guiding shoulders 3 are still in their guiding grooves 6. The stem is then detached by pushing or by spring force. When the stem of the ejector is pushed inwardly from the position shown in FIG. 4, the pin 2 can enter its groove 8, whereby the ejector has been placed in its proper position.

I claim:

1. A cartridge case ejector of a. breakdown firearm comprising on the side of the body of the firearm an oblong guiding groove, an oblong and flexible stem of the ejector, an ejector prong on the rear end of said stem, said prong when the ejector operates engaging the base of the cartridge case, guiding shoulder grooves in said guiding groove in its part adjacent to the base of the cartridge, guiding shoulders on the sides of said stem in its part adjacent to said prong, the guiding shoulders moving with loose fit in the guiding shoulder grooves over the ejection movement travel of said stem, a limiting pin consisting of the same material as the stern on the end of said stem opposite to the prong, a depression on the side of said guiding groove opposite to the cartridge case base, whereby said depression together with the guiding groove form a step against which the limiting pin of the stem restricts the ejection movement of the stem, the flexibility of the stem and the mutual fit of said guiding shoulder grooves and guiding shoulder being such that the stem can be pushed into the guiding groove while the limiting pin rests against the bottom of the guiding groove with simultaneous bending of the stem.

2. A device according to claim 1, comprising an ejector triggering mechanism and a triggering step in the central part of said stem, a triggering mechanism protecting plate and a groove in the body of the firearm, in which groove the upper end of said protective plate is held and while the inner surface of said protective plate abuts on the triggering mechanism and in its upper part on said stem in its central part, whereby the stem is held in its guiding groove when the ejector part is outside the lock frame of the firearm.

Claims (2)

1. A cartridge case ejector of a breakdown firearm comprising on the side of the body of the firearm an oblong guiding groove, an oblong and flexible stem of the ejector, an ejector prong on the rear end of said stem, said prong when the ejector operates engaging the base of the cartridge case, guiding shoulder grooves in said guiding groove in its part adjacent to the base of the cartridge, guiding shoulders on the sides of said stem in its part adjacent to said prong, the guiding shoulders moving with loose fit in the guiding shoulder grooves over the ejection movement travel of said stem, a limiting pin consisting of the same material as the stem on the end of said stem opposite to the prong, a depression on the side of said guiding groove opposite to the cartridge case base, whereby said depression together with the guiding groove form a step against which the limiting pin of the stem restricts the ejection movement of the stem, the flexibility of the stem and the mutual fit of said guiding shoulder grooves and guiding shoulder being such that the stem can be pushed into the guiding groove while the limiting pin rests against the bottom of the guiding groove with simultaneous bending of the stem.

2. A device according to claim 1, comprising an ejector triggering mechanism and a triggering step in the central part of said stem, a triggering mechanism protecting plate and a groove in the body of the firearm, in which groove the upper end of said protective plate is held and while the inner surface of said protective plate abuts on the triggering mechanism and in its upper part on said stem in its central part, whereby the stem is held in its guiding groove when the ejector part is outside the lock frame of the firearm.

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