Firearms – Breech loading – Sliding breechblock
Reexamination Certificate
1999-01-25
2001-05-22
Carone, Michael J. (Department: 3641)
Firearms
Breech loading
Sliding breechblock
Reexamination Certificate
active
06233860
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of firearms, and more particularly to a single shot falling breech block rifle.
2. Description of Related Art
The falling breech block rifle in previous variations date from the earliest breech loading designs to the present. The majority of the earlier art required rimmed cartridges for extraction and were not designed or manufactured to withstand modern high pressure loads in common use today.
The addition of modern safety features, extraction systems, and refinements for trigger adjustments are typically responsible for increasing the complexity of much of the currently produced designs and corresponding art.
Commonly, the part fitting and adjustments to prior art have been done by factory personnel or referred to reputable gunsmiths. The level of skill required to perform the services are costly due to the high costs of labor and time. At the present time, customer adjustments are not common options (or recommended) because if done incorrectly they can result in possible accidents and liability issues.
Provisions for takedown of modern designs are most often hindered due to forward mounted mainsprings and/or extractor mechanisms. This also increases difficulties encountered during stock manufacture or replacement, requiring complex fitting.
Those concerned with these and other problems recognize the need for an improved falling breech block rifle.
BRIEF SUMMARY OF THE INVENTION
Briefly stated, the present invention is intended to allow chambering and extraction of all cartridge designs in current usage. With modern materials and heat treating, this design should be suitable to handle all sporting cartridges loaded within commercial and recommended hand loading standards.
The present invention differs from modern designs most notably those by Allen, Ruger, and DeHaas, by refining the action design to use significantly fewer parts. This was accomplished by careful attention, in particular to the firing and safety mechanisms. Multiple use of common components, springs, and even common pivot locations are used when possible. This reduced the need for complex adjustment mechanisms to adjust for manufacturing tolerances, part size variations, and locations of the individual components.
In the design hereafter described, the compression spring used to provide return forces to the sear also provides spring tension to the safety and by linkage to the rest of the safety mechanisms's components. The safety is drilled to create a spring guide where the force, to the opposite force placed upon the safety, is transferred via a pin to the sear.
The design is unique in the use of common central pivot—used for both the striker and trigger. The sear requires only one additional pivot location to form the geometric relationships that will affect the functioning of the components. Trigger pull (force actually required to fire the action) and the trigger over travel are features used to critically compare the action's quality to competing designs. These are favorable within common industry standards and may be additionally modified by slight variation of springs and component dimensions.
From a manufacturing standpoint, the reduction of necessary adjustments and handwork reduces the costs of labor and increases productivity. Another significant advantage is quality improvements due to reduced variability and possible factors involving both operator training and job performance.
The invention is designed to allow for convenient takedown for the purposes of offering barrel caliber options and offers a unique takedown latch assembly. The takedown method requires removal of one screw and the loosening of the takedown latch. Change to another fitted barrel involves screwing it into the receiver, extractor change if necessary, reinstalling the screw and tightening the latch.
REFERENCES:
patent: 94577 (1869-09-01), Diaz
patent: 239496 (1881-03-01), Heeren
patent: 511632 (1893-12-01), Mason
patent: 3355833 (1967-12-01), Ruger et al.
patent: 3735517 (1973-05-01), DeHaas et al.
patent: 3830000 (1974-08-01), Browning
patent: 4128956 (1978-12-01), Foote
patent: 4270294 (1981-06-01), Compton
patent: 4570369 (1986-02-01), Gerfen
patent: 4648190 (1987-03-01), Allen
patent: 4930239 (1990-06-01), Hunter
patent: 5659992 (1997-08-01), Mistretta
patent: 5768815 (1998-06-01), Casull
Carone Michael J.
Henderson & Sturm LLP
Thomson Michelle
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