Patent ID: 6796308
Filing Date: 2004-09-28
Classification: A61M,Y10T

Abstract:
A respiratory mask assembly for delivering breathable gas to a patient, comprising:a mask frame defining a cavity with a rear opening, and a rim portion surrounding said rear opening, said rim portion including a laterally extending flange portion and a rearwardly projecting tongue, the flange portion including a rearwardly oriented cushion engagement surface and a forwardly oriented surface including a plurality of recesses angularly spaced about the mask frame; a mask cushion to space the mask frame away from the patient's face, said cushion having a rim portion including an end portion to face the cushion engagement surface of the flange portion and a groove in the end portion to receive said projecting tongue of the mask frame, wherein an outer surface of the cushion forms a rearwardly facing shoulder; and a clip member over the mask cushion, the clip member having a main body with a first side including a cushion retainer flange that engages a surface behind said shoulder of the cushion, and a second side, opposite the first side, including a plurality of securing tabs each having a surface that engages a respective one of the recesses in the forwardly oriented surface of the flange portion of the mask frame so as to releasably retain the mask cushion on the mask frame, wherein said securing tab includes a resilient detent that is retained forward of said flange portion of the mask frame.