Spray gun with dual mode trigger

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 9/01 (2006.01)

Patent

CA 2097380

A paint spray gun having a dual operating mode trigger. The trigger pivots on a gun body about an axis. The two operating modes are selected by radially positioning the trigger relative to the axis. In a first operating mode, fluid flow to a nozzle is gradually increased as the trigger is gradually squeezed to permit fluid flow control for feathering the applied coating. In this mode, the trigger is mechanically linked for actuating a valve needle. In asecond operating mode, a small actuating movement of the trigger operates a valve which causes a piston to move the valve needle to its fully open position. The second operating mode provides only on-off fluid control with a very short trigger stoke and a low trigger force.

Cette invention concerne un pistolet à peinturer dont la détente comporte deux modes de fonctionnement. La détente pivote autour d'un axe du corps du pistolet. Le choix entre les deux modes de fonctionnement se fait en faisant pivoter la détente autour de cet axe. Le premier mode donne un jet progressif à mesure qu'on appuie sur la détente pour une application à épaisseur croissante. La détente est alors couplée mécaniquement à une soupape à pointeau. Le deuxième mode est du type tout ou rien, une faible pression sur la détente ayant pour effet d'ouvrir la soupape à pointeau à plein débit par l'intermédiaire d'un piston. La course de la détente est alors très faible et la pression de commande nécessaire est très faible.

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