Vacuum released valve
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
These disadvantages of previously known devices, the present invention provides a vacuum released valve which closes an opening into a reservoir to passage therethrough until a sufficient vacuum is created with the reservoir as on initial dispensing of fluid from the reservoir. Furthermore a cap is preferably adapted to assume an inherent shape. The inherent shape is a shape such that when in the closed position; the cap will have an inherent bias to urge the female annular seat downwardly onto the male seat to form a seal and when deflected under vacuum conditions, to assume the open position; the inherent bias of the cap, on release of the vacuum, will cause the cap to reassume the position.
57 Citations
23 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- (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,
-
21. A vacuum relief mechanism adapted to permit atmospheric air to enter a liquid containing reservoir to reduce vacuum developed in the reservoir,
the mechanism comprising a vacuum relief device and a one-way valve, the vacuum relief device comprising: -
an enclosed chamber having an air inlet and a liquid inlet, the air inlet in communication with air at atmospheric pressure, the liquid inlet in communication with liquid in the reservoir, the liquid inlet open to the chamber at a height which is below a height at which the air inlet is open to the chamber, the one-way valve disposed between the liquid inlet and the reservoir movable between;
(a) a first closed position preventing flow between the reservoir and the liquid inlet, (b) a second closed position preventing flow between the reservoir and the liquid inlet and (c) an open position permitting flow through the valve,the valve in moving from the first closed position to the open position moves through the second closed position the valve movable to assume the first closed position, the valve moving from the first closed position to the open position when the pressure in the reservoir is a first vacuum level sufficiently below pressure at the liquid inlet, the valve biased to assume the second closed position, the valve moving from the second closed position to the open position when the pressure in the reservoir is a second vacuum level sufficiently below pressure at the liquid inlet, the first vacuum level being a greater vacuum than the second vacuum level. - View Dependent Claims (22, 23)
-
Specification