Volumetric metering device for container filling machine

A metering device for a machine for filling containers with a product, comprising:

• a cylinder body defining a metering chamber, configured to be filled with the product;
• a piston inside the metering chamber and separating the metering chamber into a supply compartment and a metering compartment, with the piston including a passage that communicates between the supply compartment and the metering compartment in such a way as to allow passage of the product between the supply compartment and the metering compartment;
• a valve for closing the passage;
• and
• a mover that facilitates movement of the valve or of the piston along the length of the cylinder body, wherein the valve includes a driver arranged on either side of the piston in such a way that the movement respectively of the valve or of the piston along the length of the cylinder body in a discharge direction drives the movement respectively of the piston or of the valve in the discharge direction and the movement respectively of the valve or of the piston along the length of the cylinder body in a transfer direction opposite the discharge direction, drives the movement respectively of the piston or of the valve in the transfer direction,
• wherein the passage is a through-hole,
• wherein the driver includes:
• an upper stop located on a side of the supply compartment, and arranged in such a way as to be able to come into contact with the piston on the side of the supply compartment when the valve is actuated in the discharge direction,
• a lower stop located on a side of the metering compartment, and arranged in such a way as to be able to come into contact with the piston on the side of the metering compartment when the valve is actuated according to the transfer direction, and
• a connection portion that connects the lower and upper stops, and passing through the through-hole,
• wherein the connection portion includes a passage with an inlet opening and an outlet opening located on either side of the lower stop, with the inlet opening being located between the upper stop and the lower stop, with the valve being arranged in such a way that when the lower stop is in contact with the piston, the inlet opening opens into the supply compartment, and
• wherein the passage in the connection portion includes a longitudinal duct and a transverse duct, the longitudinal duct opening on one side by the outlet opening and on an other side, of the longitudinal duct, being connected to a side of the transverse duct, with an other side of the transverse duct opening by the inlet opening;
• and
• wherein the transverse duct is arranged at an angle relative to the longitudinal duct, such that the transverse duct extends in both a longitudinal direction and a transverse direction, with the longitudinal duct extending along the longitudinal direction.

A metering device for a machine for filling containers with a product, comprising:

• a cylinder body defining a metering chamber, configured to be filled with the product;
• a piston inside the metering chamber and separating the metering chamber into a supply compartment and a metering compartment, with the piston including a passage that communicates between the supply compartment and the metering compartment in such a way as to allow passage of the product between the supply compartment and the metering compartment;
• a valve for closing the passage;
• and
• a mover that facilitates movement of the valve or of the piston along the length of the cylinder body, wherein the valve includes a driver arranged on either side of the piston in such a way that the movement respectively of the valve or of the piston along the length of the cylinder body in a discharge direction drives the movement respectively of the piston or of the valve in the discharge direction and the movement respectively of the valve or of the piston along the length of the cylinder body in a transfer direction opposite the discharge direction, drives the movement respectively of the piston or of the valve in the transfer direction,
• wherein the passage is a through-hole,
• wherein the driver includes:
• an upper stop located on a side of the supply compartment, and arranged in such a way as to be able to come into contact with the piston on the side of the supply compartment when the valve is actuated in the discharge direction,
• a lower stop located on a side of the metering compartment, and arranged in such a way as to be able to come into contact with the piston on the side of the metering compartment when the valve is actuated according to the transfer direction, and
• a connection portion that connects the lower and upper stops, and passing through the through-hole,
• wherein the connection portion includes a passage with an inlet opening and an outlet opening located on either side of the lower stop, with the inlet opening being located between the upper stop and the lower stop, with the valve being arranged in such a way that when the lower stop is in contact with the piston, the inlet opening opens into the supply compartment, and
• wherein the passage in the connection portion includes a longitudinal duct and a transverse duct, the longitudinal duct opening on one side by the outlet opening and on an other side, of the longitudinal duct, being connected to a side of the transverse duct, with an other side of the transverse duct opening by the inlet opening;
• and
• wherein the connection portion includes:
• a second inlet opening that opens into the supply compartment, and
• a second transverse duct that opens on one side, of the second transverse duct, by the second inlet opening and being connected on an other side, of the second transverse duct, to the longitudinal duct;
• and
• wherein the longitudinal duct, the transverse duct, and the second transverse duct constituting three ducts arranged in a “Y” shape.