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

FIELD: construction; mining; mechanical engineering.

SUBSTANCE: pneumatic hammer consists of a network air supply device, a cylindrical body, a working tool held by a latch relative to the cylindrical body, a handle with a body and an inlet channel, a baffle with an inlet throttle, an outlet channel and an axial hole in which a tube with a longitudinal outlet channel and a radial outlet channel is installed and fixed which is coming out of its lateral surface, an annular outlet chamber with an outlet channel formed by a baffle, a cylindrical body and a handle body, a pre-chamber formed by a handle body and a baffle and communicated through an inlet channel with a compressed air network, a striker with a through axial channel for passing said tube, dividing the cavity of cylindrical body to the working stroke chamber from the baffle side, constantly communicated with the pre-chamber by means of an inlet throttle in the baffle, and the idle chamber from the side of the working tool, periodically communicated by means of radial and longitudinal outlet channels in the tube, the outlet channel in the baffle with access to the annular outlet chamber and through the outlet channel in the body of the handle into the atmospheric chamber formed by the body of the handle and the air baffle ring, a recess in the cylindrical body from the side of the idle chamber, a bypass channel made in the form of a groove, with constant communication between the working chamber and the idle chamber between each other. Moreover, the bypass channel is made on the side surface of the inner cavity of the cylindrical body in the form of a drainage channel-groove along its generatrix with a cross section in the form of an isosceles trapezoid with a smaller base facing the body of the housing.

EFFECT: increasing the impact power transmitted to the working tool, as well as the strength of the striker and the resource of the hammer.

1 cl, 2 dwg