Patent ID: 6840406

Claim:
Proportional volumetric injector-dispenser, comprising: a chamber or cylinder ( 1 ) with two main sections ( 1 a , 1 b ) of different diameter, inside which moves a primary piston ( 3 ) with various zones ( 3 a , 3 b ) of different diameter, forming between the various zones ( 3 a , 3 b ) a large central chamber ( 5 ) which leads into the indicated two main sections in the cylinder ( 1 ), the central chamber ( 5 ) communicates with a liquid-inlet pipe, while an internal end of a lower-diameter section of the cylinder has another pipe for outlet of a dispensed liquid, with the primary piston ( 3 ) being traversed longitudinally by a slide ( 17 ), and being provided moreover with a secondary cylinder ( 12 ) throughout a tubular support and connected to the exterior of the cylinder through a check valve ( 16 ) and a connecting teat ( 15 ) for the liquid-inlet pipe that permits sliding of a secondary piston ( 7 ) whose stem ( 36 ) extends through the interior of the tubular support and is attached by the end of the secondary piston, and wherein said injector-dispenser also includes means of positioning and locking of driven flow that act as a stop on the slide ( 17 ) situated inside the primary piston ( 3 ) and in that the slide ( 17 ) includes inside a pair of discs ( 18 , 19 ) situated at an upper and lower ends of said slide ( 17 ), the discs ( 18 , 19 ) are provided with a plurality of orifices ( 20 , 21 ) and are separated by elastic means.