Patent ID: 6061901
Filing Date: 2000-05-16
Classification: B25B,Y10T

Abstract:
A pneumatic screw punching machine comprising:a housing;an air cylinder accommodated inside said housing;a ring-shaped seal;a head cap containing said ring-shaped seal fitted to an open portion of said housing on a side of a cylinder head;a slidable head valve fitted into said head cap controlling operation of said air cylinder;a piston within said air cylinder:a poppet portion formed at the top of said piston of said air cylinder;a piston catch opposing said poppet portion of said piston disposed inside said head cap so that said poppet portion of said piston and said piston catch can fit and separate relative to each other;a retaining ring preventing said slidable head valve from falling off fitted to said head cap; andan engagement portion for holding said ring type seal formed at an edge portion of a seal contact surface of said head cap, and said ring-shaped seal is fitted to said seal contact surface through said engagement portion,whereby when said head cap is separated from said housing, said head valve, said ring-shaped seal, said piston, and a driver bit can be removed integrally with said head cap from said housing.