Gas combustion-type driving tool

B - Operations – Transporting – 25 – C

Patent

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Details

B25C 1/08 (2006.01)

Patent

CA 2661203

A hammering piston (7) is so provided in a hammering cylinder (6) disposed in a body (1) as to be capable of vertically sliding. A movable sleeve (11) is vertically movably fitted to the upper outer side of the hammering cylinder (6). An airtight combustion chamber (5) is formed by upwardly moving the movable sleeve (11) until it is brought into contact with a cylinder head (10) positioned above the movable sleeve. A combustible mixed gas is explosively burned in the combustion chamber (5) and the high-pressure combustion gas is applied to the hammering piston (7) to impulsively drive the piston, whereby a fastener is hammered out by a driver (8) joined to the lower surface of the hammering piston (7). An elastic member (15) is disposed between the movable sleeve (11) and the cylinder head (10). The elastic member (15) biases the movable sleeve (11) downward.

La présente invention concerne un piston de martelage (7) qui est prévu dans un cylindre de martelage (6) disposé dans un corps (1) afin d'être capable de coulisser verticalement. Un manchon mobile (11) est installé de façon verticalement mobile sur le côté extérieur supérieur du cylindre de martelage (6). Une chambre de combustion étanche à l'air (5) est formée en déplaçant le manchon mobile (11) vers le haut jusqu'à ce qu'il soit mis en contact avec une culasse de cylindre (10) positionnée au-dessus du manchon mobile. Un gaz mélangé combustible est brûlé de façon explosive dans la chambre de combustion (5) et le gaz de combustion à haute pression est appliqué sur le piston de martelage (7) pour entraîner le piston par impulsion, moyennant quoi un élément de fixation est martelé par un élément d'entraînement (8) joint à la surface inférieure du piston de martelage (7). Un élément élastique (15) est disposé entre le manchon mobile (11) et la culasse de cylindre (10). L'élément élastique (15) sollicite le manchon mobile (11) vers le bas.

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