A gas lighter comprising a safety ignition system

F - Mech Eng,Light,Heat,Weapons – 23 – Q

Patent

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Details

F23Q 2/46 (2006.01) F23Q 2/16 (2006.01)

Patent

CA 2245837

This lighter (1) of the type comprising a reservoir for containing liquefied petroleum gas, a valve (3) mounted on the reservoir and permitting the gas to leave the same, a valve opening mechanism (4, 5), as well as an ignition system comprising a flint (6) co-operating with a spark wheel (7) rotationally operated by at least one circular operating wheel (10) mounted co-axially with the spark wheel. This lighter is characterised in that each operating wheel is independent of the spark wheel and can pivot about its own axis independently of the spark wheel, and in that the axle is fixed to the spark wheel and comprises on its periphery zones, which are concave and/or convex in transverse cross section, whereas the operating wheel comprises, in the region of its holes which enables its engagement on the axle, convex and/or concave zones, which are formed to slide with respect to the concave and/or convex zones of the axle when the force exercised on the operating wheel to ignite the lighter is below a threshold force, but engage with them when the force exercised is above the threshold force, and the largest cross-sectional dimension of the axle is less thatn the smallest cross-sectional dimension of the hole of the operating wheel, to permit the significant radial displacement of the operating wheel with respect to the axle and, below the said threshold force to permit the said pivoting movement of the operating wheel with respect to the axle.

L'invention concerne un briquet (1) comprenant un réservoir destiné à contenir un gaz de pétrole, un clapet (3) monté sur le réservoir et permettant au gaz de s'en échapper, un mécanisme d'ouverture (4, 5) du clapet, et un système d'allumage comprenant une pierre à feu (6) coopérant avec une molette d'allumage (7), qui tourne quand elle est actionnée par au moins une molette de commande circulaire (10) montée coaxiale avec elle. Le briquet est caractérisé par le fait que chaque molette de commande, indépendante de la molette d'allumage, peut pivoter autour de son propre axe indépendamment de ladite molette d'allumage, et que l'axe, fixe par rapport à la molette d'allumage, présente à sa périphérie des zones ayant une coupe transversale concave et/ou convexe, tandis que la molette de commande présente, dans la région de ses trous, qui permet son engagement sur l'axe, des zones concaves et/ou convexes. Celles-ci coulissent par rapport aux zones concaves et/ou convexes de l'axe quand la force exercée sur la molette de commande pour allumer le briquet est inférieure à une force seuil, mais elles bloquent lesdites zones quand la force exercée est supérieure à la force seuil. Le plus grand diamètre de l'axe est inférieur au plus petit diamètre du trou de la molette de commande, de façon à permettre un déplacement radial significatif de cette dernière par rapport à l'axe quand la force exercée est supérieure à la force seuil, et à permettre ledit pivotement de la molette de commande par rapport à l'axe quand la force exercée est inférieure à la force seuil.

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