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:
Jul. 24, 2012
Filed:
Feb. 09, 2007
Geoffrey D. Daly, Sherwood, AU;
Alexander Virr, Balmain, AU;
Stephen A. Lea, Winston Hills, AU;
Dion Charles C. Martin, Concord, AU;
Nicholas J. Reed, Mount Colah, AU;
Larry Puckeridge, Marrickville, AU;
Timothy Tsun-fai Fu, Carlingford, AU;
Geoffrey D. Daly, Sherwood, AU;
Alexander Virr, Balmain, AU;
Stephen A. Lea, Winston Hills, AU;
Dion Charles C. Martin, Concord, AU;
Nicholas J. Reed, Mount Colah, AU;
Larry Puckeridge, Marrickville, AU;
Timothy Tsun-Fai Fu, Carlingford, AU;
ResMed Limited, Bella Vista, New South Wales, AU;
Abstract
A variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.