Trigger sprayer venting system with reduced drag on vent piston

Details Trigger sprayer venting system with reduced drag on vent piston Trigger sprayer venting system with reduced drag on vent piston

B - Operations, Transporting

67

D

B67D 7/60 (2010.01)

Patent

CA 2579580

A venting system of a manually operated trigger sprayer vents the interior of a liquid container connected to the trigger sprayer. The trigger sprayer is provided with a vent chamber that surrounds the pump chamber, and a vent piston that surrounds the pump piston. The vent piston is received in the vent chamber for reciprocating movements between a vent closed and vent opened position in the vent chamber, and the vent chamber having two different interior diameter sections with a larger interior diameter section reducing drag on the vent piston when the vent piston is moved to the vent opened position.

La présente invention concerne un système d'évent d'un pulvérisateur à gâchette manuellement actionnée, qui met à l'atmosphère un récipient de liquide relié au pulvérisateur à gâchette. Le pulvérisateur à gâchette est pourvu d'une chambre d'évents entourant la chambre de pompe, un piston d'évent entourant le piston de pompe. Ce piston d'évent est reçu dans la chambre d'évent pour un va-et-vient entre une position d'évent fermé et une position d'évent ouvert dans la chambre d'évent. En l'occurrence, cette chambre d'évent présente deux segments de diamètres intérieurs différents, le segment de grand diamètre réduisant la traînée sur le piston d'évent à son passage en position d'évent ouvert.

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