PNEUMATIC HAMMER Russian patent published in 2022 - IPC B25D9/04 E21C37/24 

FIELD: instruments.

SUBSTANCE: invention relates to a pneumatic hammer. The hammer contains a cylindrical body, a working tool held relative to the cylindrical body, a handle with a body, a partition with an axial hole in which a tube is installed and fixed, an annular exhaust chamber with an outlet formed by a partition, a cylindrical body and a handle body, a pre-chamber formed by a handle body and a partition, and a striker with a through axial channel for omissions of the mentioned tube. The drummer divides the cavity of the cylindrical body into a working stroke chamber on the side of the partition and an idling chamber on the side of the working tool. On the side surface of the striker, a bypass channel is made in the form of a bypass channel-a bald patch having the form of a segment, the same cross-sectional area along the forming surface of the striker and coming out on its side surface and end face from the side of the working stroke chamber. The bypass channel-flat is provided with its continuation in the form of a stepped through drainage channel-flat, having a cross-sectional area smaller than the cross-sectional area of the segment of the bypass channel-flat, and extending to the end of the striker from the side of the idling chamber with the formation of the said channel-flat through stepped channel-flat, constantly communicating the said chambers of the worker and idling between each other.

EFFECT: impact energy transferred to the working tool increases.

1 cl, 1 dwg