Pneumatic percussion tool

Details Pneumatic percussion tool Pneumatic percussion tool

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Patent

CA 1094046

PNEUMATIC PERCUSSION TOOL ABSTRACT OF THE DISCLOSURE A pneumatic percussion tool comprising a hollow cylindri- cal body with a nut which covers the open end of the body and has longitudinal channels opening at one end on the in- ternal cylindrical surface of the nut. Reciprocating under the pressure of compressed air inside said body is a stepped ram with an axial channel and at least one radial channel communicating with said axial channel. The front portion of the ram together with the walls of the body forms a rever- se-stroke chamber which communicates periodically with the compressed air line through the channels of the ram. The surface of the ram large-diameter step is provided with longitudinal channels for communication of the reverse-stroke chamber with the atmosphere. The external surface of the ram small-diameter step, the internal surface of the body, the face of the nut and the face of the ram large-diameter step form an annular space which is put periodically in communication with the atmosphere whilst the portion of the ram small-diameter step interacting with the nut has at least one radial port arranged so that during the movement of the ram towards the front end of the body said annular space is filled with compressed air through the radial port of the ram and the longitudinal channel of the nut.

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