AIR-OPERATED HAMMER Russian patent published in 1995 - IPC

FIELD: air-operated hammers. SUBSTANCE: surface of collar 23 of tube valve 5 is used as the bearing surface, which prevents jamming. The front chamber of valve 12 is used as the feed one for front chamber 8. Due to condition l₁>l₂, stepped striker 3 moves upwards under the action of pressure of expanding compressed air in front chamber 8, which enhances the efficiency of the air-operated hammer, l₁ is the distance between the lower edge of the guide surface of the striker larger step in its lower position and the lower edge of the exhaust port; l₂ is the distance between the upper edge of the guide surface of the striker end-piece in its lower position and the lower edge of the internal cylindrical surface of the tube valve in its upper position. EFFECT: enhanced efficiency. 2 cl, 2 dwg