US 12,390,670 B2
Dual mode respirator
Mark Magidson, Los Angeles, CA (US); and Sukwon Kang, Torrance, CA (US)
Assigned to Moldex-Metric, Inc., Culver City, CA (US)
Filed by Moldex-Metric, Inc., Culver City, CA (US)
Filed on Jan. 28, 2022, as Appl. No. 17/649,243.
Prior Publication US 2023/0241424 A1, Aug. 3, 2023
Int. Cl. A62B 9/02 (2006.01); A62B 7/00 (2006.01); A62B 7/10 (2006.01); A62B 9/04 (2006.01)
CPC A62B 9/02 (2013.01) [A62B 7/10 (2013.01); A62B 9/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A dual mode respirator comprising:
a face piece;
an inhalation port;
an exhalation port;
a port closure movable to close the exhalation port and switch the dual mode respirator from a source control mode to a free exhalation mode of the dual mode respirator;
an exoskeleton supported in an opening of the face piece, wherein a rotation to move the port closure to effect a switch from the source control mode to the free exhalation mode is provided by a shaft mounted rotatably in the exoskeleton, the shaft extending through the exoskeleton between an internal end and an external end of the shaft; and
an internal lever connected to the internal end of the shaft.
 
16. A dual mode respirator comprising:
a face piece;
an inhalation port;
an exhalation port; and
a port closure movable to close the exhalation port and switch the dual mode respirator from a source control mode to a free exhalation mode of the dual mode respirator, wherein the port closure is manually movable by a user to pivot about a hinge to open or close the exhalation port and effect a switch between the source control mode and the free exhalation mode of the dual mode respirator.