Forehead supports for facial masks

摘要

A face mask assembly for supplying breathable gas to a wearer includes a mask frame 112, a facial cushion 16 attached to the mask frame 112, and a forehead support. The forehead support includes a mounting receiver 120 defining an arc shaped channel and attached to the mask frame, and an arc shaped elongate bar which is received within the channel of the receiver and can be moved between a retracted and extended position as a pinion gear 154 attached to a turnable adjustment knob 152 and engaged with a gear rack on the bar is rotated by turning the knob. A forehead cushion assembly 50, 52, 54, 122 is either fixedly or pivotably attached to the distal end of the bar.