05570689 is referenced by 208 patents and cites 15 patents.

A respiratory mask including a flexible seal member that is formed to receive nasal and/or oral portions of a user's face. The flexible seal member is adapted to resiliently deform against the facial structure of the user to form a seal therewith when the mask is secured to the user's head by suitable straps or related headgear. The mask further includes a single block-like spacer for limiting deformation of the mask seal when the mask is engaged with the user's face and an adjustment mechanism for adjusting the position of the spacer. A presently preferred adjusting mechanism includes a flexible strap member upwardly extending from the mask and along which the spacer may be conveniently and selectively positioned.

Title
Respiratory mask having a vertically adjustable spacer element that limits seal deformation on a wearers face
Application Number
129440
Publication Number
5570689
Application Date
May 1, 1995
Publication Date
November 5, 1996
Inventor
Andrew Serowski
Pittsburgh
PA, US
John R Pujol
Pittsburgh
PA, US
Eric W Starr
Pittsburgh
PA, US
Agent
Reed Smith Shaw & McClay
Assignee
Respironics
PA, US
IPC
A62B 18/08
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