AIR HAMMER WITH THROTTLE AIR DISTRIBUTION Russian patent published in 2008 - IPC B25D9/04 E21B1/30 

FIELD: engines and pumps.

SUBSTANCE: air hammer incorporates a hollow cylinder, a striker with a central channel arranged inside the aforesaid hollow cylinder and dividing it into idling and operating stroke chambers, a movable pipe with an always-open inlet throttle channel, a thrust collar and a step, a cover with a collar and a hole, the cylinder barrel and working tool. The movable pipe passes through the striker central channel to communicate the air line chamber with the idling chamber via the aforesaid always-open inlet throttle channel. The movable pipe thrust collar represents an annular barrel with a limiting annular collar resting on the cover. An circular boosting chamber is formed between the cylinder barrel side surface and the cover collar. The annular barrel is furnished with one or several through throttle channels with a designed flow section. The cylinder walls are provided with the boosting radial channels communicating the annular boosting chamber with the idling chamber. The cover collar incorporates a throttle channel intercommunicating permanently the air line and boosting chambers.

EFFECT: operating chamber pressure increase approximating to air line chamber pressure.

25 cl, 4 dwg