Patent ID: 8596275
Filing Date: 2013-12-03
Classification: A61M

Abstract:
1. A patient interface comprising: a faceplate including a plurality of headgear attachment elements; a seal member operatively coupled to the faceplate; and an adjustment mechanism coupling the seal member to the faceplate such that the seal member is adjustable relative to the faceplate from a first position to a second position and maintains the seal member in the second position during use of the patient interface, wherein the adjustment mechanism comprises (i) a ratchet mechanism supported by the faceplate and having one or more prongs, (ii) a barrel member having a plurality of teeth provided on an exterior surface of the barrel member and first threads provided on an interior surface of the barrel member, wherein the one or more prongs engage the teeth, and a (iii) a stem having an end coupled to the seal member and having second threads provided on an exterior surface of the stem, wherein the stem is received within an interior of the barrel member such that the first threads engage the second threads, and wherein rotation of the ratchet member causes rotation of the barrel member and rotation of the barrel member causes the stem to move relative to the faceplate within the interior of the barrel member such that the seal member is moveable between a plurality of discrete positions relative to the faceplate.