Patent
   D249279
Priority
Sep 01 1975
Filed
Feb 12 1976
Issued
Sep 05 1978
Expiry
Sep 05 1992
Assg.orig
Entity
unknown
32
6
n/a
The ornamental design for an exhaust valve of respiratory mask, as shown and described.

FIG. 1 is a top plan view of an exhaust valve for a respiratory mask showing my new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top perspective view of the valve guiding member shown separately for clarity of illustration;

FIG. 5 is a top perspective view of the valve flap member;

FIG. 6 is a top perspective view of the valve housing;

FIG. 7 is a top perspective view of the exhaust valve in an assembled condition.

Backlund, Sigurd Alfons

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