| 摘要 |
A setting device arranged to use caseless propellent charges for driving fastening elements, such as bolts, nails and the like, into a hard receiving material, includes a casing containing an axially slidable barrel forming a feed element at its rearward end. A counterpressure member is slidably movably supported within the casing in axial alignment with the barrel. The feed element and counterpressure member combine to form a combustion chamber for the caseless propellent charges. A frusto-conical surface is formed on the counterpressure member and seats in sealing contact with a complementary frusto-conical surface in the casing. |
