The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 1994
Filed:
Feb. 10, 1992
Wolfgang Falb, Krummesse, DE;
Karl-Ludwig Gippert, Lubeck, DE;
Ulrich Heim, Lubeck, DE;
Uvo Holscher, Stockelsdorf, DE;
Siegfried Kiske, Krummesse, DE;
Gotz Kullik, Lubeck, DE;
Ralf-Ernst Loser, Kreuzkamp, DE;
Christoph Maurer, Schwartau, DE;
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Abstract
A gas ratio control device for anesthetic apparatus with an anesthetic gas feed line 1, which has a control valve 12 and a first measuring resistance 6, and an oxygen feed line 2 with a second measuring resistance 10, wherein the differential pressure determined from the measuring resistances is sent to a proportional member 13 for regulating oxygen feed to anesthetic gas feed. So oxygen concentration will not drop below a minimum oxygen concentration value in the case of anesthetics to be metered at both low and high doses, one of the measuring resistances 6, 10 can be replaced or bridged over with a bypass line 14, which contains a throttle point 15 (FIG. 1).