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:
Feb. 13, 1996
Filed:
Feb. 18, 1993
Erkki Heinonen, Helsinki, FI;
Markku Hyvonen, Helsinki, FI;
Instrumentarium Corp., , FI;
Abstract
An apparatus for the regulation of a gas volume delivered to a patient during a respiratory cycle. The apparatus includes at least one valve (9 or 8) for discharging some of the propellant gas flowing from a propellant gas source (4) into a propellant gas chamber (18), the propellant gas chamber (18) being at least partially defined by a wall (17), having a second chamber (19) on the other side thereof. The location of said wall changes as the propellant gas pressure increases in the propellant gas chamber, thus increasing the volume of the propellant gas chamber, the volume of second chamber (19) on the other side of wall (17) diminishing, thus forcing the gas being delivered to a patient to flow towards a patient (21). Thereafter, in order to perform the exhalation of a patient, the propellant gas chamber pressure is allowed to discharge through a valve (9 or 8), whereby the volume of propellant gas chamber (18) diminishes and the volume of second chamber (19) increases as a result of the displacement of the wall (17). Between the propellant gas chamber (18) and propellant gas source (4) is a pressure regulating element (6), capable of regulating the pressure of the propellant gas flowing from the propellant gas source. A method for the regulation of a propellant gas flow to be delivered into a propellant gas chamber (18) and supplied from a propellant gas source (4) by pressure regulation of the propellant gas.