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. 12, 2002
Filed:
May. 25, 1999
Shane Darren Finn, New South Wales, AU;
ResMed, Limited, North Ryde, AU;
Abstract
A CPAP treatment apparatus has a patient mask is coupled to an air delivery conduit. The air delivery conduit is coupled to an impeller and motor, collectively forming a blower arrangement for providing a positive pressure of air to the conduit. A controller receives a signal representing respiratory flow. The controller is operable to cause the blower to supply an inspiratory phase pressure and an expiratory phase pressure. The controller selectively triggers generation of a pressure intermediate of the inspiratory phase and expiratory phase pressures for a period of time as a transitional state upon the first flow threshold being crossed. The controller also selectively triggers generation of a pressure intermediate of the expiratory phase and inspiratory phase pressures for a period of time as a transitional state upon the second flow threshold being crossed.