Patent ID: 8371302
Filing Date: 2013-02-12
Classification: A61M,A62B

Abstract:
1. A frame for a respiratory mask assembly that delivers breathable gas to a patient, the frame comprising: a main body having a front surface and a rear surface adapted in use to face the patient, the main body having an aperture extending through the front surface for the introduction of breathable gas into a nasal breathing cavity defined by the frame; and an inner wall and an outer wall each extending rearwardly from the rear surface, the inner and outer walls being spaced to define a channel therebetween that is structured to receive a side wall of a cushion such that the cushion may be repeatedly attached to and detached from the frame, wherein the main body and the inner and outer walls are formed in one piece and the inner and outer walls are spaced in parallel, wherein a length of the inner wall is different than a length of the outer wall such that the inner wall protrudes away from the rear surface a distance that is different than a distance the outer wall protrudes away from the rear surface, wherein at least a portion of the channel is shaped and dimensioned to generally follow a contour of the patient's face, and wherein the channel has a generally triangular shape, and wherein the side wall of the cushion is adapted to be positioned between the inner and outer walls when attached to the frame.