Device for cartridge chamber in cartridge tool |
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| 申请号 | US32892273 | 申请日 | 1973-02-02 | 公开(公告)号 | US3851416A | 公开(公告)日 | 1974-12-03 |
| 申请人 | GUNNEBO BRUKS AB; | 发明人 | ENGSTROM P; BOYE E; | ||||
| 摘要 | A gun for firing nails, bolts, etc., by the force generated by detonating an explosive cartridge includes a firing mechanism with a striker pin for detonating the cartridge by operating the firing mechanism. The gun further comprises an automatic firing mechanism including a hole of circular cross section for receiving therein the shell of the cartridge and has a further hole of circular cross section matching the bottom flange of the cartridge shell. The first hole has at its inside a successively decreasing diameter so that a junction between this hole and a third hole is obtained. The third hole has a smaller diameter than the second hole. The decrease of the diameter of the second hole starts at the point at which crimping of the cartridge shell commences when the cartridge is inserted into the cartridge chamber. | ||||||
| 权利要求 | 1. In a cartridge tool including a barrel having a bore and a cartridge chamber for receiving crimped cartridges and communicating with the bore which axially guides a striker piston, the improvement comprising the cartridge chamber having three sections, a first cylindrical section for accommodating a cartridge, a second cylindrical section communicating with the bore, said second cylindrical section having a smaller diameter than said first cylindrical section and being displaced therefrom, and a third section connecting said first and second sections, said third section having a diameter which gradually decreases and having a length which is shorter than the length of the crimped portion of the crimped cartridge so that such crimped portion extends into said second section when the crimped cartridge is completely inserted in the chamber and the border of said second and third sections providing a breaking edge when the cartridge is fired whereby the part of the crimped portion forward of the breaking edge presses against said second cylindrical section and the remainer pivots away from the wall of said third section. 2. The cartridge tool of claim 1 wherein said third section is frusto-conical. |
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