Patent ID: 9604023
Date: 2017-03-28
CPC Classifications: A61M

Claim:
1. A patient interface device for delivering a flow of breathing gas to an airway of a patient, comprising: a patient contacting component having a patient contacting surface structured to face toward a face of the patient when the patient interface device is donned by the patient, the patient contacting surface including a plurality of ribs extending therefrom, wherein one or more of the ribs extend intermittently around the patient contacting surface, wherein one or more of the ribs extend concentrically and continuously around the patient contacting surface, wherein the plurality of ribs includes a first rib, a second rib, and a third rib, wherein the second rib is adjacent to the first rib and the third rib, wherein the first rib, the second rib, and the third rib extend substantially in parallel with each other, wherein, at a selected point along a length of the second rib, the first rib and the second rib are spaced apart by a first distance and the second rib and the third rib are spaced apart by a second distance, and wherein the first distance and the second distance are different.