Gas combustion type driving tool

B - Operations – Transporting – 25 – C

Patent

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Details

B25C 1/00 (2006.01) B25C 1/08 (2006.01)

Patent

CA 2618680

A gas combustion type driving tool, wherein a fastener is driven out from a nose part when a gas is explosively burned in a combustion chamber (5) to impulsively drive a hammering piston. A gas line (26) is installed between the combustion chamber (5) and a feed cylinder (21) storing a feed piston for reciprocatingly moving a feed claw (23) engageable with and disengageable from the connection fastener in a nail feed direction for feeding the feed claw to a nose part side and a retreating direction reverse to the nail feed direction. A check valve (31) having a restriction hole (33) is openably disposed in the intermediate part of the gas line (26). The check valve (31) is normally energized by a spring in the closing direction and openably operated against a spring force by a gas pressure from the combustion chamber.

L~invention concerne un outil d~entraînement de type à combustion de gaz, dans lequel une attache est expulsée d~une partie de nez lors de la détonation d~un gaz dans une chambre de combustion (5) propulsant un piston percuteur. Une conduite de gaz (26) est installée entre la chambre de combustion (5) et un cylindre d~amenée (21) dans lequel est monté un piston d~amenée servant à communiquer un mouvement de va-et-vient à une mâchoire d~amenée (23) susceptible se s~enclencher et de se déclencher de l~attache dans une direction d~amenée de clous, de façon à amener la mâchoire d~amenée du côté de la partie de nez, et dans une direction de recul opposée à la direction d~amenée de clou. Un clapet anti-retour (31) doté d~un trou limiteur (33) est disposé dans la partie intermédiaire de la conduite de gaz (26) de façon à pouvoir s~ouvrir. Le clapet anti-retour (31) est normalement actionné par un ressort dans la direction de fermeture et s~ouvre à l~encontre de la force du ressort grâce à la pression du gaz dans la chambre de combustion.

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