PNEUMATIC HAMMER Russian patent published in 2023 - IPC B25D9/04 E21C37/24 

FIELD: pneumatic impact machines; construction; mining and mechanical engineering.

SUBSTANCE: invention relates to pneumatic impact machines and can be used in construction, mining and mechanical engineering. A pneumatic hammer has a cylindrical body, a working tool with a shank held relative to the cylindrical body, a handle with an inlet channel, a partition with an inlet throttle channel and an axial hole in which a tube with a longitudinal outlet channel and a radial outlet channel extending on its side surface is installed and fixed, an ring-shaped outlet chamber with an outlet channel formed by a partition, a cylindrical body and a handle body, a pre-chamber formed by a handle body and a partition, communicated through an inlet channel with a compressed air network, a striker with a through axial channel for passing the said tube dividing the cavity of the cylindrical body into the working stroke chamber from the side of the partition, constantly communicated with the pre-chamber through the inlet throttle channel in the partition, the idle chamber from the side of the shank of the working tool, periodically communicated by means of a radial and longitudinal outlet ducts in the tube and the outlet channel in the partition with access to the ring-shaped outlet chamber and through the outlet channel in the handle body to the atmospheric chamber formed by the handle body and the air baffle ring, an annular groove in the cylindrical body from the side of the idle chamber, a bypass channel on the side the surface of the striker, and the bypass channel-groove is made with a cross-sectional perimeter in the form of an isosceles triangle, an isosceles trapezoid or along the arc of a circle facing from the side surface of the striker and simultaneously forming it.

EFFECT: reduction in hydraulic resistance, a reduction in air flow from the network, an increase in the impact energy transmitted to the shank of the working tool, and an increase in the working life of the impactor of the pneumatic hammer.

1 cl, 4 dwg