Hammer device

B - Operations – Transporting – 25 – D

Patent

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Details

B25D 9/14 (2006.01)

Patent

CA 2329533

Hammer device comprising a machine housing (1) with a hammer piston (2) movable to-and-fro. The movement to-and-fro of the hammer piston is controlled by a valve body (6) being movable to-and-fro in the machine housing, said valve body via channel (7) alternatively connecting a drive surface (5) on the hammer piston to a pressure source (8) and to low pressure (9). In order to speed up the turning of the hammer piston at its rear dead centre the machine housing is provided with a room (10) which by the hammer piston is separated from the channel (7) at the same time as the valve body (6) maintains the pressure from a pressure source (8) on the rear end surface (5) of the hammer piston.

L'invention concerne un dispositif de percussion qui comprend un boîtier de l'appareil (1) muni d'un piston percuteur (2) va-et-vient. Le mouvement de va-et-vient du piston percuteur est commandé par un corps de soupape (6) qui se déplace en va-et-vient à l'intérieur du boîtier de l'appareil, ledit corps de soupape exécutant un mouvement alternatif pour faire communiquer, par l'intermédiaire d'un conduit (7), une surface d'entraînement (5) du piston percuteur avec une source de pression (8) et un côté basse pression (9). Pour accélérer la rotation du piston percuteur à son arête centrale arrière, le boîtier de l'appareil est muni d'une chambre (10) séparée du conduit (7) par le piston percuteur, tandis que le corps de soupape (6) maintient la pression exercée par la source de pression (8) sur la surface d'extrémité arrière (5) du piston percuteur.

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