Device for producing high pressure in a fluid in miniature

US6918547B2 · kind B2 · utility

Inventors

• Joachim Jaeger · Bruchsal, DE
• Pasquale Cirillo · Dortmund, DE
• Joachim Eicher · Karlsruhe, DE
• Johannes Geser · Gerlingen, DE
• Bernhard Freund · Gau-Algesheim, DE
• Bernd Zierenberg · Ingelheim am Rhein, DE

Key dates

• Filing date: Mar 24, 2004
• Grant date: Jul 19, 2005
• Expiry date: Mar 24, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7916
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A miniaturized 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 atomizer. This consists of a two part housing which comprises a pump housing with nozzle, a blocking mechanism, a spring housing with spring, a non-pressurized storage container for the fluid and a medical counter integrated in the spring housing.The valve operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomizer is safe and simple to operate and environmentally friendly. The fluid is metered extremely accurately.The atomizer is used, for example, to produce an inhalable aerosol of a liquid medicament without the use of propellant gas, at 320 bar, for example.