Apparel – Guard or protector – For wearer's head
Patent
1985-11-12
1987-05-19
Rimrodt, Louis K.
Apparel
Guard or protector
For wearer's head
2440, A42B 106
Patent
active
046655700
ABSTRACT:
A conformal seal carried on a face mask is disclosed herein which is mounted about the edge marginal peripheral region of a rigid shell intended to be placed over the nose and mouth areas of a user. The seal includes an endless toroid made with a pliable membrane preferably filled with a deformable filler material so, that upon donning the mask, the seal causes the filler material volume to become smaller in cross section so that its peripheral length is shorter or reduced in cross section as compared with the peripheral length of the toroidal membrane. Thus, the slack membrane allows the filler material to conform to and seal with any irregular face against which it is applied.
REFERENCES:
patent: 295242 (1884-03-01), Genese
patent: 861504 (1907-07-01), Cover
patent: 1295391 (1919-02-01), Troppman
patent: 2393533 (1946-01-01), Heinz
patent: 3725953 (1973-04-01), Johnson et al.
patent: 3789428 (1974-02-01), Martin et al.
patent: 4480429 (1984-11-01), Knox
Marrs Roger A.
Rimrodt Louis K.
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