Device of miniaturised construction for producing high pressure in a fluid to be atomised

1998.04.03 (71) Seeking (72) Inventor

Boehringer Ingelheim International GmbH, Binger Strasse 173, 55216 INGELHEIM AM RHEIN, DE

Bemd Zierenberg, Gflthestrasse 1, 55411 BINGEN AM RHEIN, DE

Bernhard Freund, Karl-Domdey-Strasse 28.55435 GAU-ALGESHEIM, DE

Joachim Jaeger, Franz-Blasi-Strasse 3.76646 BRUCHSAL, DE

Joachim Eicher, Gustav-Korthen-Allee 24,44227 DORTMUND, DE

Johannes Geser, Goenschstrasse 11A, 44227 DORTMUND, DE

Pasquale Cirillo, In Pastor's Wharf 16.44229 DORTMUND, DE

Bryn Aarflot AS, PO Box 449 City Center, 0104 OSLO, NO (74) Representative (54) Designation Miniaturized fluid pressure device, fluid atomizer and a reciprocating pump for high pressure fluid production (57) Summary

A miniaturized device for generating high pressure in a fluid places stringent requirements on the manufacturing process. The device according to the invention consists of a hollow piston (57) which is displaceably arranged in a cylinder, and a valve body (58) which is guided by the hollow piston (57) and is mounted so that it is axially movable with respect to the piston (57). 57). The valve body (58) is arranged at one end of the hollow piston (57) inside and immediately before the end of the piston (57).

The device is used in a mechanically driven high pressure atomizer. This is a two-piece housing comprising a pump sleeve (52) with a nozzle (54), a blocking mechanism (62), a spring housing (67) with a spring (68), a non-pressurized fluid reservoir (71) ( 72), as well as a mechanical counter integrated into the spring housing (67). The valve (58) operates without any auxiliary force, closes very quickly and seals well against high pressure. The nebulizer is safe and easy to use and environmentally friendly. The fluid is dosed very accurately. The atomizer is used e.g. to produce an inhalable aerosol of a liquid drug without the use of propellant gas, e.g. at 320 bar.

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