Patent ID: 6899125

Claim:
A flow-adjusting device for a liquid, in particular a painting product, comprising: a housing ( 2 ) having an inlet channel ( 4 ) and an outlet channel ( 5 ) for connection with a respective pipe ( 6 ), a closure assembly ( 7 ) arranged in said housing ( 2 ) between said inlet and said outlet channel ( 4 , 5 ) for drivingly adjusting a liquid flow through the device, and a deformable diaphragm ( 3 ) inserted in said housing ( 2 ), said diaphragm ( 3 ) being deformable in proportion to a pressure of the liquid in said outlet channel ( 5 ) and acting on said closure assembly ( 7 ), wherein said housing ( 2 ) comprises a hollow body ( 15 ) internally bounding a storage chamber ( 16 ) arranged between said inlet channel ( 4 ) and said closure assembly ( 7 ), said storage chamber ( 16 ) having a lower portion ( 16 a ) to be engaged by the liquid and an upper portion ( 16 b ) defining an air-tight region within said storage chamber ( 16 ) for storing air under pressure engaging the liquid in said lower portion ( 16 a ), wherein said hollow body ( 15 ) internally houses a feed mouth ( 18 ), formed at an end of said inlet channel ( 4 ), an outlet mouthpiece ( 19 ), formed at said closure assembly ( 7 ), and wherein said feed mouth ( 18 ) and said outlet mouthpiece ( 19 ) are both spaced apart from said upper portion ( 16 b ) of said storage chamber ( 16 ), and wherein said feed mouth ( 18 ) and said outlet mouthpiece ( 19 ) are arranged both substantially at a same distance from said upper portion ( 16 b ); and wherein said inlet channel ( 4 ) has at least one final section defined by a tube ( 20 ) inserted in said storage chamber ( 16 ).