Patent ID: 8365735

Claim:
A respiratory mask comprising: a mask body including a mask shell, and a mask cushion connected to a rear side of said mask shell; a front cover disposed in front of and hinged to said mask shell, and having a support arm extending upwardly; a forehead support unit having a forehead frame connected to a top end of said support arm, and a forehead pad connected to a rear side of said forehead frame; an adjustment unit connected to at least one of said mask shell and said front cover, and operable to produce relative movements of said mask shell and said front cover and to adjust the position of said mask shell relative to said front cover; and a hinge unit attached to a lower part of said front cover and a lower part of said mask shell, said adjustment unit is operable to move upper parts of said front cover and said mask shell away from or toward each other; wherein said front cover has a mid hole, said mask shell has an air conduit projecting forwardly from said mask shell and extending through said mid hole of said front cover, and said adjustment unit is disposed on said front cover and said mask shell above said air conduit; and wherein said adjustment unit includes at least one adjustment member which projects forwardly from said mask shell to extend through said mid hole of said front cover and which has a plurality of adjusting elements that are spaced apart from each other in a front-to-rear direction, said front cover being engageable with a selected one of said adjusting elements.