Patent ID: 7815076
Filing Date: 2010-10-19
Classification: A47K

Abstract:
1. A mechanism comprising a fluid containing reservoir having an opening, and a valve for providing communication through the opening, between an inside reservoir side of the valve open into the reservoir and an outside side of the valve, the valve disposed across the opening movable between: (a) a first closed position preventing flow through the valve, (b) a second closed position preventing flow through the valve, and (c) an open position permitting flow through the valve, the valve movable to assume the first closed position and the valve when moved to the first closed position is retained in the first closed position unless pressure on the reservoir side of the valve is below pressure on the outside side of the valve by at least a first vacuum level, and wherein when the valve is in the first closed position and pressure on the reservoir side of the valve is below pressure on the outside side of the valve by at least the first vacuum level the valve moves from the first closed position to the open position, the valve is biased to assume the second closed position, the valve when in the second position is retained in the second position unless pressure on the reservoir side of the valve is below pressure on the outside side of the valve by at least a second vacuum level, and wherein when the valve is in the second closed position and pressure on the reservoir side of the valve is below pressure on the outside side of the valve by at least the second vacuum level the valve moving from the second closed position to the open position, the first vacuum level being greater than the second vacuum level.