Patent ID: 8485191

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 first track member and a second track member spaced apart from the first track member, and a plurality of pairs of oppositely positioned teeth provided on the first track member and the second track member, each of the teeth extending outwardly in a respective first direction that is substantially normal to a surface of the first track member and a surface of the second 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 first flexible member structured to slideably receive the first track member and a second flexible member spaced apart from the first flexible member and structured to slideably receive the second track member, the first flexible member and the second flexible member each having a hooked portion positioned at its distal end and extending in a second direction, the second direction being transverse to the first direction associated with each of the teeth, the hooked portions each being structured to independently flex toward and away from one another in the second direction to selectively engage a selected one of the pair of oppositely positioned teeth, and (2) a forehead support bracket coupled to the second portion of the support arm.