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:
Apr. 21, 2020
Filed:
Dec. 13, 2012
Resmed Pty Ltd, Bella Vista, AU;
Steven Paul Farrugia, Lugarno, AU;
Kristian Thomsen, Drewvale, AU;
Matthew Alder, Scarborough, AU;
Tracey Bullivant, North Ryde, AU;
ResMed Pty Ltd, , AU;
Abstract
A method and apparatus are disclosed for determining airflow through a PAP device while applying PAP therapy. The actual speed of a bloweris measured. The desired motor current I DES required for the actual speed to approach or maintain a desired speed is used, together with the actual speed RPM ACT, in a flow estimation algorithm to determine flow through the PAP device. The estimation algorithm consists of a two-dimensional look-up table, where the inputs are the desired motor current and actual motor speed, and the output is the flow through the PAP device.