Patent ID: 7527179
Filing Date: 2009-05-05
Classification: B65D

Abstract:
1. A pump lid assembly for use with a container, the lid assembly comprising: a) a pump cylinder configuration having a seat-portion for sealing connection to the container; and b) a rotatable piston portion at least a portion of said rotatable piston portion being deployed within said pump cylinder, thereby defining between them a variable pump volume; wherein one of said pump cylinder and said rotatable piston portion includes at least one angled groove, and the other of said pump cylinder and said rotatable piston portion includes at least one pump activation pin configured to engage said angled groove, such that during rotation of said rotatable piston portion in a first rotational direction said activation pin contacts an edge of said angled groove, thereby generating linear motion of said rotatable piston portion in a first linear direction and during rotation of said rotatable piston portion in a second rotational direction said activation pin contacts an edge of said angled groove, thereby generating linear motion of said rotatable piston portion in a linear direction substantially opposite to said first linear direction, thereby alternatingly increasing and decreasing said variable pump volume, and causing displacement of gases between an interior volume of the container and an exterior atmosphere.