US 7,708,171 B2Granted

Pressure control device

AssigneeIPS Patent S.A.

InventorsPhilip Malcolm Regan, Roy Edwin Van Swieten

Life of this patent

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Abstract

The invention is a pressurized gas providing and gas pressure regulating device. The invention is a container with an over pressurized second chamber of pressurized gas that can be released to the exterior of the container when a valve that is integrally connected to a piston that along with a first cylinder forms a first chamber that is filled with a comparably less over pressurized gas that pushes the valve open when the gas pressure outside of the container is too low, thereby permitting the over pressurized second chamber to fluidly connect via the valve and thereby increase the pressure outside the container, such as to a volume of gas located below a piston within a fluid dispenser, the first and second chambers are shaped as cylinders and the first cylinder fits within the second chamber.

Claims27

Dependent claims

A pressure control device in a pressure control system for maintaining a constant predetermined excess pressure arranged in a fluid dispensing container, said pressure control device comprising:

a cylinder having an open end and a closed end, and a piston movable within said cylinder defining a first chamber to be filled with a gas for exerting said predetermined excess pressure, a second chamber, a passageway from the second chamber to the outside of the device leading to the fluid dispensing container, and a valve for releasing and closing said passageway,
wherein the second chamber is formed by a high-pressure container with a closed end and an open end provided with a rim part and said high-pressure container being filled with a gas at a pressure higher than said predetermined excess pressure,
said piston having means for actuating said valve dependent from the pressure difference between the first chamber and the fluid dispensing container, so that if the fluid pressure in the fluid dispensing container drops below the predetermined excess pressure, gas flows from the second chamber to the fluid dispensing container until the container pressure approximately equals said predetermined excess pressure, and
further wherein a closure is mounted to the rim part of the high-pressure container in order to close the second chamber, wherein the first chamber is part of the closure, such that the high-pressure container encompasses the cylinder of the first chamber.

1 more element

A method for manufacturing a pressure control device for use in a pressure control system for maintaining a constant predetermined excess pressure arranged in a fluid dispensing container, said pressure control device comprising a first cylinder having an open end and a closed end, and a piston movable within said cylinder defining a first chamber to be filled with a gas for exerting said predetermined excess pressure, a second chamber, a passageway from the second chamber to the outside of the device leading to the fluid dispensing container, and a valve for releasing and closing said passageway, wherein the second chamber is formed by a high-pressure container with a closed end and an open end provided with a rim part and said high-pressure container being filled with a gas at a pressure higher than said predetermined excess pressure, said piston having means for actuating said valve dependent from the pressure difference between the first chamber and the fluid dispensing container, so that if the fluid pressure in the fluid dispensing container drops below the predetermined excess pressure, gas flows from the second chamber to the fluid dispensing container until the container pressure approximately equals said predetermined excess pressure, and further wherein a closure is mounted to the rim part of the high-pressure container in order to close the second chamber, wherein the first chamber is part of the closure, such that the high-pressure container encompasses the cylinder of the first chamber, said manufacturing method comprising:

forming the first cylinder;
forming the piston, the valve elements, the high-pressure container with the closed end and the rim part at the open end, and the closure out of a synthetic material of high stability;
forming a central opening in the bottom of the high-pressure container;
assembling the piston with a sealing ring in the first cylinder, whereas a gas is filled in the first chamber at a predetermined pressure;
mounting the first cylinder with respect to the valve, such that the actuating means of the piston is positioned correctly with respect to the valve;
and
mounting the closure to the high-pressure container.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/587,810Filed 5 Aug 2004
Priority: EP 0440505930 Jan 2004
Published: US 2007/0125809 A17 Jun 2007
Granted: 4 May 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

B65D 83/64
With contents and propellant separated: by pistons
B65D 83/673
With contents and propellant separated: at least a portion of the propellant being separated from the product and incrementally released by means…
G05D 16/10
Without auxiliary power: the sensing element being a piston or plunger
B29C 65/08
By heating, with or without pressure: using ultrasonic vibrations