US3564950A

US3564950A - Cartridge case extractor tool

Info

Publication number: US3564950A
Application number: US758065A
Authority: US
Inventors: John K Jorczak; David A Behrendt
Original assignee: Colts Inc
Current assignee: Colt Industries Inc
Priority date: 1968-09-06
Filing date: 1968-09-06
Publication date: 1971-02-23
Anticipated expiration: 1988-02-23

Abstract

TOOL DESIGNED TO FIT THROUGH SHELL EJECTION WINDOW OF AN M-16 AUTO-LOADING RIFLE TO ENGAGE THE RIM OF A SPENT CARTRIDGE AND TO CAUSE EXTRACTION OF THE SPENT CARTRIDGE UPON APPLICATION OF A PRYING MOMENT TO THE TOOL.

Description

CARTRIDGE CASE EXTRACTOR TOOL 2 Sheets-Sheet 1 Filed Sept. 6, 1968 TTd/P/VEJ U u 5y 1 d W Feb, I??? 1971 J, JORCZAIK EII'AL 3,564,950

CARTRIDGE CASE EXTRACTOR TQOL Filed Sept. 6, 1968 2 Sheets-Sheet 2 FIG-4 3,564,950 CARTRIDGE CASE EXTRACTOR TOOL John K. Iorczalr, Springfield, Mass., and David A.

Behrendt, Bristol, Conn., assignors to Colts Inc., Hartford, Comm, a corporation of Arizona lFiled Sept. 6, 1968, Ser. No. 758,065 Int. Cl. 1325b 27/02 11.5. Cl. 8ll3.ti5 1 Claim ABSTRACT OF THE DISCLOSURE Tool designed to fit through shell ejection window of an M-16 auto-loading rifle to engage the rim of a spent cartridge and to cause extraction of the spent cartridge upon application of a prying moment to the tool.

BACKGROUND OF THE INVENTION An auto-loading rifle may fail to extract a cartridge which is lodged in position by dirt, deformation, or corrosion. The extractor on the rifle bolt may cause a section of the rim of a lodged cartridge to shear out before the shell is freed from the firing chamber. The tool of the present invention is designed to be ready for instant use without any time-consuming tool assembly or firearm disassembly. Further, the tool is designed to engage a substantial arcuate surface of the cartridge rim and exert a substantial extraction force on the cartridge case upon the application of a prying moment to the extraction tool. A large mechanical advantage designed into the tool generates the substantial extraction force upon application of the prying moment.

Previously, sections of a rifle cleaning rod have been assembled and inserted into the rifle muzzle and used to prod the lodged cartridge until it became loosened. The time required to assemble a sectional rod and prod a cartridge loose is excessive under combat conditions, making such a sectional rod undesirable for removal of a severely lodged cartridge, whereas the tool described hereinafter is capable of quickly supplying an extremely large ejection force to the cartridge without rupturing the rim thereof.

BRIEF SUMMARY OF THE INVENTION An object of this invention is to provide an L shaped extraction tool, a first leg of which can be readily inserted through the M-16 rifle shell ejection window to permit a flange on said leg to engage an arcuate segment of the rim of a cartridge lodged in the rifle breech and transmit a large prying force to the rim, the tool being storable within the M-16 pistol grip handle.

Other objects and advantages will become obvious as the following description is studied in conjunction with the drawings which illustrate a preferred form of the invention in which:

DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of a preferred embodiment of the invention.

FIG. 2 is a perspective view of a firearm having a side ejection window and a hollow pistol grip.

FIG. 3 is an enlarged fragmentary view of a portion States Patent of FIG. 2 showing the extractor tool of FIG. 1 engaging a shell.

FIG. 4 is an enlarged fragmentary view of the pistol grip portion of FIG. 2 showing the extractor tool of FIG. 1 in storage position.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring more particularly to the drawings, FIG. 1 illustrates an L shaped extractor tool 10 having first and second legs formed by bending half round stock having a semicircular cross section to approximately a right angle with each leg having a half round surface at the interior side of the angle forming an inner face with an opposite flat outer face at the exterior side of the angle. The first leg has a semicircular recess 12 in said outer face and a semicircular terminal flange 14 outboard of recess 12, said flange adapted to engage the rim of a spent cartridge. The axis of the recess is parallel to the first leg. While shown to be continuous, flange 14 in an equivalent alternate configuration could comprise discrete spaced apart segments.

A firearm 16 of the type intended for use with the tool 10 is shown generally in FIG. 2. Firearm 16 is shown to have an ejection window 18 therein which provides access for the first leg of tool 10 such that flange 14 can be brought into engagement with a segment of rim 20 of cartridge 22 when the bolt 24 is retracted. When a force F1 is applied to the second leg of tool 10 in the direction indicated by the arrow F1, a moment is created about the forward edge 36 of ejection window 18. This moment is balanced by the resistance of cartridge 20 to extraction; however, a high lever ratio is provided so that the maximum resistance of cartridge 20 may be easily overcome. Once loosened, the cartridge can be quickly brought to ejection window 18 and removed by application of a small force F2 to the second leg at the place indicated by arrow in FIG. 3.

To store tool 10 within grip 26, a hinged plate 28, pivota'bly mounted to grip 26 by means of roll pin 30 fixedly positioned in bore 32 of plate 28, is opened by depressing spring loaded detent 34, contained within plate 28, until said detent moves clear of the shell of handle 26 permitting plate 28 to swing to the open position. The pointed nose of a bullet or a rigid shoelace tip or other similarly suitable and readily available instrument may be used to depress said detent.

It is evident from the foregoing description of the invention that variations thereto will occur to those skilled in the art without departing from the scope of the invention as set forth in the following claims.

What we claim is:

1. An L-shaped cartridge extraction tool capable of being stored in a firearm and adapted to be inserted through the ejection window of said firearm into the receiver thereof comprising:

(a) a member made of a single piece of half rounded stock having a semicircular cross section bent to form first and second integrally connected legs defining an approximate right angle therebetween, said second leg being substantially longer than said first leg,

(b) each of said legs having a continuous flat outer face and a continuous rounded inner face,

(c) said first leg having a semicircular recess in its 4 outer face with an axis parallel to said first leg, said outer face to force said flange over the end of the recess being located adjacent the end thereof, said lodged cartridge and start extraction of said cartridge, first leg having a semicircular flange extending be- (f) and said second leg serving as a pull handle for tween said recess and said end adapted to fit over further extraction of said cartridge. the end of a cartridge, 5 ((1) said first leg having a suflicient inner face length R f e e Ci d so that the inner wall of the flange may extend immediately inboard of the lodged cartridges rim when UNITED sirATEs PATENTS the apex of said right angle abuts the forward face 2,363,520 11/1944 Flsh of said ejection Window, (e) said second leg for forming a handle, and the inner 10 TRAVIS MCGEHEE Pnmary Exammer face of said second leg for forming a pivot near said U S C1 X R apex with the forward face of said ejection window to thereby enable a force exerted on said second legs 29278