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AssigneeBoehringer International GmbH
InventorsJoachim Jaeger, Pasquale Cirillo, Joachim Eicher, Johannes Geser, Bernhard Freund, Bernd Zierenberg
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A miniaturised device for producing high pressure in a fluid imposes stringent requirements on the manufacturing process. The device according to the invention consists of a hollow piston displaceably mounted in a cylinder and a valve member which is guided by the hollow piston and mounted so as to be axially movable relative to the hollow piston. The valve member is arranged at one end of the hollow piston inside or immediately in front of the end of the hollow piston. The device is used in a mechanically operated high pressure atomiser. This consists of a two part housing which comprises a pump housing with nozzle, a blocking mechanism, a spring housing with spring, a non-pressurised storage container for the fluid and a mechanical counter integrated in the spring housing. The valve operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomiser is safe and simple to operate and environmentally friendly. The fluid is metered extremely accurately. The atomiser is used, for example, to produce an inhalable aerosol of a liquid medicament without the use of propellant gas, at 320 bar, for example.
A device for producing high pressure in a fluid, comprising a piston which is movable in a cylinder, a high pressure chamber which is located in front of the piston inside the cylinder, and a valve, which device includes
A device according to clam 1, 9 or 12, including
An atomiser for atomising a fluid, comprising an upper housing part, a lower housing part, a spring housing, a spring, a pump housing, a nozzle, a blocking mechanism and a storage container, the atomiser including
An atomiser for spraying liquid at high pressure comprising a pump for pressurising a predetermined volume of liquid and discharging it through an atomising nozzle, the pump comprising a cylinder, a piston reciprocable therein, the piston being tubular and providing an inlet flow path to the cylinder beyond a first end of the piston and being provided with a non-return valve, a liquid reservoir having a top surface, membrane, stopper or cap of resilient material penetrated by the other end of the piston to permit liquid flow from the reservoir through the length of the piston into the cylinder on the induction stroke, the piston and the reservoir being fixed relative to each other when the pump is operated, and a pump reciprocating means for moving the piston and cylinder relatively to each other.
A reciprocating pump device for producing high pressure in a fluid, comprising a cylinder, a hollow cylindrical piston which is movable in the cylinder and provides a path for fluid therethrough, a high pressure chamber which is located in front of the piston inside the cylinder and which is supplied with fluid through said path, and an inlet non-return valve member in said fluid path which moves with the piston but is capable of limited guided movement along the piston axis between a closed position in contact with a valve seat provided by the piston and an open position spaced from the valve seat, the valve member being so shaped and guided that it cannot rotate about an axis transverse to the piston axis such that a predetermined surface thereof engages the seat.
Dependencies are inferred from the claim text.