Patent ID: 8113390
Filing Date: 2012-02-14
Classification: A61L,A61M,B05B

Abstract:
1. An on-demand fluid dispenser comprising: an expandable gas chamber comprising a first moveable structure forming a first wall of the expandable gas chamber and moving along a linear path, the first moveable structure comprising a first mechanism to inhibit movement of the first moveable structure in a backward direction along the linear path; a second moveable structure forming a second wall of the expandable gas chamber and moving along the linear path, the second moveable structure comprising a second mechanism to inhibit movement of the second moveable structure in the backward direction along the linear path; a fluid chamber, wherein the first moveable structure forms a wall of the fluid chamber; an on-demand gas cell to generate a gas on demand and to direct the gas to the expandable gas chamber to expand the expandable gas chamber, wherein expansion of the expandable gas chamber moves the first moveable structure in a forward direction along the linear path to reduce a volume of the fluid chamber and to dispense an amount of fluid from the fluid chamber, wherein contraction of the expandable gas chamber moves the second moveable structure in the forward direction along the linear path; and a resilient member coupling the first and second moveable structures to contract the expandable gas chamber.