Pneumatic device having a selectively variable orifice

F - Mech Eng,Light,Heat,Weapons – 15 – B

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F15B 5/00 (2006.01) F16K 3/08 (2006.01)

Patent

CA 2598032

A pneumatic device (24) having a selectively variable pneumatic output comprises an inlet connectable to an air source and an outlet disposed in a flow path, a control assembly in the flow path and having a plurality of differently sized primary orifi (28a-28h) . The control assembly includes a selector (30) having a secondary orifice (39) , the selector moveable relative to the primary orifi between a plurality of positions, the primary orifi and the secondary orifice arrangeable relative to one another to permit the secondary orifice to be in flow communication with a selected one of the primary orifi. The control assembly further blocks the remaining primary orifi when the secondary orifice is aligned with the selected one of the primary orifi .

La présente invention concerne un dispositif pneumatique (24) ayant une sortie pneumatique variable de manière sélective comprenant une entrée pouvant être connectée à une source d'air et une sortie disposée dans un chemin d'écoulement, un ensemble de commande dans le chemin d'écoulement, et ayant une pluralité d'orifices primaires de tailles différentes (28a-28h). L'ensemble de commande comporte un sélecteur (30) ayant un orifice secondaire (39), le sélecteur étant mobile par rapport aux orifices primaires entre une pluralité de positions, les orifices primaires et l'orifice secondaire pouvant être agencés les uns par rapport aux autres de manière à permettre à l'orifice secondaire d'être en communication fluidique avec un orifice sélectionné parmi les orifices primaires. L'ensemble de commande bloque en outre le reste des orifices primaires lorsque l'orifice secondaire est aligné avec l'orifice primaire sélectionné.

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