Patent ID: 7621427

Claim:
A device for delivering metered quantities of a paste substance to containers, the delivering device being associated to an automatic machine including: a hopper for supplying said paste substance to the delivering device; at least one filling nozzle, connected to the delivering device; said delivering device including: a central body; a vertical cylinder made in said central body, with an open upper end and two lateral diametrically opposite and horizontally aligned apertures, respectively an inlet aperture and an outlet aperture; a cap for closing the upper end of said cylinder; an inlet channel situated beside the cylinder and parallel to the cylinder, the inlet channel having an open upper end and a lower end leading to the inlet aperture of said cylinder; a piston sliding to move up and down inside said cylinder between an upper dead position and a lower dead position; a longitudinal groove extending from a top of the piston downwards, along a part of the piston, such that a bottom end of said groove is aligned with lower ends of said inlet aperture and outlet aperture, when the piston is in the upper dead position; an inlet conduit block fastened removably to said central body to connect a lower outlet aperture of said hopper with said inlet channel; an exhaust conduit connecting said outlet aperture with conveying moans leading to said filling nozzle; a stem made integral with said piston and removably connected to power means provided for operating the piston to move up and down and into rotation in step relation with an up and down motion, so that when the piston goes down, said longitudinal groove faces said inlet aperture, for performing a suction step and introducing said paste substance, coming from the hopper, into said cylinder, whereas when the piston is moved upwards said longitudinal groove faces said outlet aperture, for performing a delivery step and delivering a metered quantity of said paste substance expelled from the cylinder to said filling nozzle.