US Patent 7877817 Mask attachment assembly

A mask attachment assembly for use in attaching a mask in a sealed position on the user's face. The mask attachment assembly includes a panel member with a sleeve extending along the panel member, and one or more straps extending through and slidable within the sleeve. The strap includes a first attachment assembly on a first end of the strap for engaging a first engagement member on a first side of the mask, and a second attachment assembly on a second side of the strap for engaging a second engagement member on a second side of the mask. The strap is repositionable by releasing the attachment assemblies, sliding the strap through the sleeve of the panel and re-engaging the attachment assemblies. A patient interface device and a strap are also disclosed.