Surgery – Respiratory method or device – Face mask covering a breathing passage
Patent
1989-05-31
1991-08-13
Burr, Edgar S.
Surgery
Respiratory method or device
Face mask covering a breathing passage
12820123, 12820612, 2173, A62B 1808
Patent
active
050387766
ABSTRACT:
Head harness form gas mask consists of several pieces of biaxially stretchable elastic fabric stitched together to provide a concave configuration in the relaxed state. The harness is shaped and sized to fit a range of normal human heads by stretching over the back and top of the head. The forward edge of the harness has a number of tongues of the elastic fabric that attach to a gas mask. The preferred material for the harness is a 280 denier bare spandex power net fabric that has a flat load versus elongation curve. A gas mask fitted with the harness applies a uniform pressure within the comfort range on the face of the wearer without significant adjustment of the harness, despite wide ranges in the head size and configuration of the wearer.
REFERENCES:
patent: 2058989 (1936-10-01), Isaac
patent: 2809374 (1952-11-01), Reed
patent: 2821192 (1958-01-01), Monro
patent: 3043299 (1962-07-01), Potash
Gallup Brian
Gray Donald
Harrison Brian H.
Main Lorne A.
Newman James A.
Burr Edgar S.
Funk Stephen R.
Her Majesty the Queen in right of Canada as represented by the
Hinds William R.
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