Patent ID: 9303634
Filing Date: 2016-04-05
CPC Classification: F04B,Y10T

Claim Text:
1. A proportional dosimeter for metering an auxiliary liquid into a main liquid, comprising a dosimeter body with a main liquid inlet ( 2 , 2 . 2 ) and an outlet ( 3 , 3 . 2 ), a hydraulic motor ( 4 ) housed in the body, actuated by the main liquid, and connected to a plunger piston ( 5 , 5 . 1 ) to drive same in a reciprocating rectilinear movement, the plunger piston moving in a first chamber ( 6 ) that is open at a first end ( 7 ) away from the hydraulic motor and opens at a second end ( 8 ) into the interior volume ( 9 , 9 . 2 ) of the dosimeter body containing main liquid, the plunger piston performing an intake phase during an outward stroke in which it moves away from the first end ( 7 ) of the chamber, it being possible for the plunger piston to leave the first chamber at the end of the outward stroke, a valve being provided to allow the liquid to pass to the interior volume of the body, during the return stroke, once a certain pressure in the first chamber is exceeded, characterized in that it comprises a variable-volume second chamber (