Patent ID: 8210179

Claim:
A gas delivery mask comprising: (a) a mask shell; (b) a curvilinear attachment member associated with the mask shell, the attachment member comprising a track having a track member and a plurality of teeth provided on the track member, each of the teeth extending outwardly from the track member in a respective first direction that is substantially normal to a surface of the track member; and (c) a forehead support comprising: (1) a support arm having a first portion and a second portion, wherein the first portion is coupled to the mask shell via the attachment member, and wherein the first portion is slideable along the attachment member in a curvilinear fashion wherein the first portion does not pivot or rotate about a fixed axis to permit movement of the entire forehead support in a first direction relative to the mask shell and a second direction relative to the mask shell simultaneously, wherein the first portion includes an attachment assembly having a flexible member structured to slideably receive the track member, and wherein the flexible member includes a hooked portion extending in a second direction, the second direction being transverse to the first direction associated with each of the teeth, the flexible member being structured to flex in the second direction to enable the hooked portion to selectively engage the teeth, wherein in order to release the hooked portion from engagement with any one of the teeth, the hooked portion must be flexed inwardly along the second direction toward a center of the attachment member, and (2) a forehead support bracket coupled to the second portion of the support arm.