Air valve for portable paint gun

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 1/32 (2006.01) B05B 7/12 (2006.01)

Patent

CA 2047014

An improved control shaft seal and air valve for a portable paint gun with the seal having a radial clearance with the shaft except at a shaft sealing surface of limited axial length. The shaft seal has a conical surface radially outward of the shaft sealing surface to provide a sealing surface and also to provide transfer of axial forces at that surface to a radial direction to provide a force to urge the shaft sealing surface against the control shaft. A second conical surface of the seal provides for retention of the seal on an air valve spring when the paint gun is disassembled. An improved air valve for portable paint guns is also disclosed having a rigid axial hub and radial support carrying a relatively flexible rim portion adapted to engage a tapered seating surface in the gun.

Joint d'étanchéité de l'arbre de commande et soupape à air améliorés pour pistolet à peinture portatif. Il existe un jeu radial entre le joint d'étanchéité et l'arbre, sauf sur une surface de scellement de l'arbre d'une longueur axiale limitée. Le joint d'étanchéité de l'arbre comporte une surface conique se prolongeant radialement à l'extérieur de la surface de scellement de l'arbre de manière à fournir une surface de scellement et à transférer une force axiale à cette surface en direction radiale pour pousser la surface de scellement de l'arbre contre l'arbre de commande. Une deuxième surface conique du joint d'étanchéité permet de retenir celui-ci sur le ressort de la soupape à air lorsque le pistolet à peinture est démonté. L'invention porte également sur une soupape à air améliorée pour un pistolet à peinture portable comportant un noyau axial rigide et un support radial portant un bord relativement flexible adapté pour engager une surface portante conique dans le pistolet.

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