Jet pump cooling system for combustion-powered...

B - Operations – Transporting – 25 – C

Patent

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Details

B25C 1/08 (2006.01)

Patent

CA 2666720

A cooling system for combustion-powered fastener-driving tools (10) comprises the use of cooling fin structures (36, 38) upon the external wall members of the combustion chamber (14) and cylinder (16). Fluid flow paths are constructed between internal wall portions of a surrounding tool housing (26) and the cooling fin structures mounted upon the external wall members of the combustion chamber and cylinder. In this manner, ambient cooling air is passed over and through the cooling fin structures whereby the combustion chamber and cylinder components of the fastener-driving tool are efficiently cooled such that the temperature level of the fastener-driving tool is maintained at a desirable temperature level despite the substantial amount of heat normally generated during each combustion cycle.

L'invention concerne un système de refroidissement pour des outils d'entraînement d'éléments de fixation à combustion (10), employant des structures à ailettes de refroidissement (36, 38) sur les éléments de paroi extérieure de la chambre de combustion (14) et du cylindre (16). Des voies d'écoulement fluidiques sont créées entre des parties de paroi intérieure d'un boîtier d'outil périphérique (26) et les structures à ailettes de refroidissement situées sur les éléments de paroi extérieure de la chambre de combustion et du cylindre. Ainsi, l'air de refroidissement ambiant passe sur les structures à ailettes de refroidissement et entre celles-ci, et les composants de la chambre de combustion et du cylindre de l'outil d'entraînement d'éléments de fixation sont refroidis efficacement de telle manière que la température de l'outil d'entraînement d'éléments de fixation est maintenue à un niveau souhaité malgré la quantité non négligeable de chaleur normalement produite lors de chaque cycle de combustion.

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