AIR-OPERATED PERCUSSION MACHINE Russian patent published in 1994 - IPC

FIELD: mechanical engineering, building. SUBSTANCE: air-operated percussion machine has hollow housing 1, stepped shank 4 with air delivery rod 3 both of them being located in housing 1, piston 6 associated with shank 4, and valve 9. Piston 6 is made in the form of sleeve with axial hole in bottom. It is pivotally connected with shank 4 in the area of shank step 3 of the least diameter. Valve 9 is mounted on end face of step 3 of shank with a capability of periodical closing axial hole 7 in sleeve bottom. This design ensures reduced consumption of compressed air. EFFECT: improved efficiency. 3 dwg