Apparatus and method for dosing a product

An apparatus for dosing a product, comprising:

• a body;
• movable first and second pistons provided in the body, the pistons at least partially defining a dosing cavity located between the first and second pistons;
• at least one outlet for passing product from the cavity, the at least one outlet being defined at least partially by the second piston;
• a valving member configured to provide valving of product flow through the at least one outlet;
• and
• at least one inlet for passing product into the cavity.

An apparatus for dosing a product, comprising:

• a body;
• movable first and second pistons provided in the body, the pistons at least partially defining a dosing cavity located between the first and second pistons;
• at least one outlet for passing product from the cavity;
• a valving member configured to provide valving of product flow through the at least one outlet;
• at least one inlet for passing product into the cavity;
• and
• a biasing member for biasing at least one of the pistons.

A method of dosing a product, comprising:

• providing an apparatus comprising a cavity defined, at least in part, by first and second movable pistons;
• flowing a product from a reservoir into the cavity;
• moving the pistons in response to pressure of the product;
• closing at least one inlet providing product flow from the reservoir to the cavity;
• opening at least one outlet for the cavity, wherein the opening comprises moving a closure member in response to movement of the first piston;
• and
• passing the product from the cavity via the at least one outlet.