Patent ID: 6415961
Filing Date: 2002-07-09
Classification: G01F

Abstract:
A dispensing member for a container, comprising:a body; a piston configured to slide inside the body, the piston being movable between a first position and a second position in response to pressure of a product exerted on the piston; variable volume chamber at least partially defined by the piston, the variable volume chamber being configured to communicate with a container, the first position of the piston maximizing a volume of the variable volume chamber and the second position of the piston minimizing the volume of the variable volume chamber, a difference between the maximum volume and the minimum volume comprising a first volume; and an outlet for passing product from the variable volume chamber while the piston moves from the first position to the second position, wherein the dispensing member is configured to dispense a first amount of product up to the first volume while the piston moves from the first position to the second position and, dependent on a manner in which pressure of a product is exerted on the piston, a second amount of product.