Monolithic extractor system for a shotgun
A two piece ejection system for a shotgun includes a chamber portion having a first, second and third section of varying outside diameters and an extractor formed from a hollow cylindrical tube having a first and second end, the second end including a plurality of slots. The slots are configured to allow the extractor to slide over the circumference of the third section of the chamber portion and be in sliding engagement with the second section of the chamber portion. Interference means on the plurality of slots and the sections of the chamber portion restrict the travel of the extractor over the second section of the chamber portion.
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The invention relates to break-open firearms having one or more barrels and more particularly to the ejectors for such guns, wherein the ejectors eject spent cartridges from the barrels when the barrels are moved from their closed position to their open position.
BACKGROUND OF THE INVENTIONBroadly, the term “break-open firearm” includes all firearms that have one or more barrels pivotally mounted on the frame of the firearm. The barrel or barrels are rotatable from their closed and locked ready-to-fire position to their open loading-and-unloading position, as required by the shooter. Such firearms are normally designed so that they can be disassembled into two or more parts or sub-assemblies (for example, a barrel sub-assembly and a stock sub-assembly) for convenience in cleaning, storing and transporting the firearm, and they include single and double barreled rifles and shotguns and combinations thereof (including both side-by-side and over-and-under type).
In break-open firearms of the type to which the present invention relates the barrel or barrels are mounted on a barrel housing (also known as a monoblock) that is pivotally mounted on the frame of the firearm, the barrel housing being formed with one or more longitudinally extending barrel receiving bores in which the rearward ends of the barrels are received and to which they are secured. The barrel housing also includes a longitudinally movable ejector adapted to eject a spent cartridge from one of the barrels when the barrels and barrel housing are rotated from their closed position to their open loading-and-unloading position. Various cartridge case ejectors are described in U.S. Pat. Nos. 3,715,825; 3,984,933; 5,109,621; 5,459,956; and 6,839,997.
Currently, the most commonly employed ejectors having ejector receiving slots on the outside surface of the chamber portion of a barrel, with matching dovetail-shaped transverse cross-sections on the ejector. A close and smoothly functioning fit of all moving or mating parts is an extremely important feature and the cavity geometry of the ejector chamber controls the throw of the ejector when it is assembled. It is difficult, exacting and time consuming to obtain the close fit and smooth functioning required of the matching dovetail surfaces of the ejectors and ejector receiving slots of conventional break-open firearms. By way of example, in order to minimize lateral play of the dovetailed ejector within the dovetailed ejector receiving slots, it is necessary to fit the facing dovetailed surfaces of these parts together with a clearance of about 0.0005 inch. As a result, considerable effort has heretofore been expended in an attempt to devise other means for retaining ejectors in the ejector receiving slots of the barrel housing that would be less difficult to fabricate than the required smooth fit and small tolerances than are in the conventional dovetailed parts.
A need exists for an ejector that requires minimal milling and reduced manufacturing costs.
A further need exists for an ejector system that will enhance the ejection characteristics of pulling the spent cartridge from the ejector as the barrel or barrels are rotated from their closed and locked ready-to-fire position to their open loading-and-unloading position.
A still further need exists for a two piece ejection system that separates the chamber geometry from the rim recess geometry.
BRIEF SUMMARY OF THE INVENTIONThe present invention is directed to a monolithic ejection system for break open firearms. The inventive ejection system comprises a two piece ejection system that includes a chamber portion having a first, second and third section of varying outside diameters and an extractor formed from a hollow cylindrical tube having a first and second end, the second end including a plurality of slots. The slots are configured to allow the extractor to slide over the circumference of the third section of the chamber portion and be in sliding engagement with the second section of the chamber portion. Interference means on the plurality of slots and the sections of the chamber portion restrict the travel of the extractor over the second section of the chamber portion.
The first section has a diameter A, the second section has a diameter B and the third section has a diameter C in which the diameter B is smaller than diameter A and diameter C is larger than diameter B but smaller than diameter A.
The interference means is comprised of an interior expanded portion on each of the plurality of slots and a ledge formed at the intersection of the second and third sections of the chamber portion.
The first end of the extractor includes a U-shaped cutout and a rim around the circumference of the first end.
The present invention is further directed to an ejection system that includes a chamber portion having a plurality of sections with varying outside diameters and an extractor formed from a hollow cylindrical tube having a first and second end. The second end includes a plurality of slots configured to allow the extractor to slide over the circumference of at least one of the chamber sections of varying outside diameters. When assembled, the two piece ejection system provides for movement of the extractor from a closed position to a full throw position.
The plurality of sections include a first section having a diameter A, a second section having a diameter B and a third section having a diameter C, wherein diameter B is smaller than diameter A and diameter C is larger than diameter B but smaller than diameter A.
The interference means on the plurality of slots and the sections of the chamber portion restrict the travel of the extractor over a selected section of the chamber portion. The interference means is comprised of an interior expanded portion on each of the plurality of slots and a ledge formed at intersections of the sections of the chamber portion.
The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims. The novel features which are believed to be characteristic of the invention, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGSFor a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawing, in which:
The present invention relates to break-open firearms of the type in which the barrel or barrels of the firearm are mounted on a barrel housing that is pivotally secured to the frame of the firearm, the barrel and barrel housing being rotatable from their closed ready-to-fire position to their open loading-and-unloading position. The improved monolithic ejector system of the invention will be described in conjunction with the over-and-under shotgun shown in the drawings but is not limited to this particular firearm.
As shown best in
In a prior art dovetailed ejector system 30 illustrated in
The inventive ejection system 40 comprises a chamber portion 42 of barrels 16, 18 and a separate extractor 44 as illustrated in
The interior surface of chamber 42 is uninterrupted, whereas the outer surface 46 of chamber 42 has sections of reduced diameter (
The extractor 44 is a hollow cylindrical tube having first and second ends 58, 60 respectively. The first end 58 includes a rim 62 positioned around the circumference of the first end 58. Rim 62 also includes a generally U-shaped cutout 64 (
The second end 60 includes a plurality of slots 66 placed equal-distant around the circumference of the second end 60 (
The length of the extractor 44 can be generally from 2 inches to 0.8 inches and the diameter will depend upon the diameter of the chamber 42. The length of the slots 66 can range from about 1.5 inches to 0.375 inches. The extractor 44 can be sized to accommodate any gauge shell and can be configured for a variety of rifles.
The inventive ejection system 40 provides a number of advantages. First, the two piece ejection system separates the chamber geometry from the rim recess geometry wherein the rim recess geometry now becomes the extractor for the spent cartridges. This allows for more flexibility in manufacturing the ejection system. Second, the inventive ejection system 40 requires little milling on the extractor 44 and no milling on the chamber 42. Third, with the extractor 44 of the present invention, the spent cartridge is pulled from almost all of the circumference of the rim 62 of the cylindrical ejector 44.
The ejection system can be constructed from material well know to one skilled in the art of rifle manufacturing.
Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims
1. A two piece ejection system for a shotgun, the ejection system comprising:
- a chamber portion having a first, second and third section of varying outside diameters;
- an extractor formed from a hollow cylindrical tube having a first and second end, the second end including a plurality of slots;
- the slots being configured to allow the extractor to slide over the circumference of the third section of the chamber portion and being in sliding engagement with the second section of the chamber portion;
- wherein interference means on the plurality of slots and the sections of the chamber portion restrict the travel of the extractor over the second section of the chamber portion.
2. The two piece ejection system of claim 1, wherein the first section has a diameter A, the second section has a diameter B and the third section has a diameter C.
3. The two piece ejection system of claim 2, wherein diameter B is smaller than diameter A and diameter C is larger than diameter B but smaller than diameter A.
4. The two piece ejection system of claim 1, wherein the interference means is comprised of an interior expanded portion on each of the plurality of slots and a ledge formed at the intersection of the second and third sections of the chamber portion.
5. The two piece ejection system of claim 1, wherein the first end of the extractor includes a U-shaped cutout and a rim around the circumference of the first end.
6. The two piece ejection system of claim 1, wherein the plurality of slots are at least four slots.
7. The two piece ejection system of claim 1, wherein the length of the extractor is between 2 to 0.8 inches.
8. An ejection system for a shotgun, the ejection system comprising:
- a chamber portion having a plurality of sections with varying outside diameters;
- an extractor formed from a hollow cylindrical tube having a first and second end, the second end including a plurality of slots configured to allow the extractor to slide over the circumference of at least one of the chamber sections of varying outside diameters;
- wherein when assembled, the two piece ejection system provides for movement of the extractor from a closed position to a full throw position.
9. The ejection system of claim 8, wherein the plurality of sections include a first section having a diameter A, a second section having a diameter B and a third section having a diameter C, wherein diameter B is smaller than diameter A and diameter C is larger than diameter B but smaller than diameter A.
10. The ejection system of claim 8, wherein interference means on the plurality of slots and the sections of the chamber portion restrict the travel of the extractor over a selected section of the chamber portion.
11. The ejector system of claim 10, wherein the interference means is comprised of an interior expanded portion on each of the plurality of slots and a ledge formed at intersections of the sections of the chamber portion.
12. The ejection system of claim 8, wherein the first end of the extractor includes a U-shaped cutout and a rim around the circumference of the first end.
Type: Application
Filed: May 6, 2005
Publication Date: Nov 9, 2006
Applicant: Briley Manufacturing Co (Houston, TX)
Inventor: Cliff Moller (Houston, TX)
Application Number: 11/123,927
International Classification: F41A 15/00 (20060101);