3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

David P Knivsland

Joseph G Reischel

Vaughn B Grannis

David C Byram

Gerald M Brostrom

Paul J Flannigan

Johannes Hoogenraad

Michael J Bartholomew

Frank J Fabin

Pauk J Flannigan

A respiratory protection composite facepiece is disclosed and includes a polymeric rigid facepiece body portion having a first surface and a second surface and a silicone sealing facepiece element chemically bonded at least one of the first surface or the second surface. The first and second surfaces can be opposing major surfaces. A second silicone element is chemically bonded to at least one of the first surface or the second surface. Methods of making the same are also disclosed.

Unitary respirator with molded thermoset elastomeric elements

A respiratory protection composite facepiece includes a polymeric rigid facepiece body having a first surface and a second surface, and a silicone sealing facepiece element chemically bonded to at least one of the first surface and the second surface. Methods of forming a respiratory protection composite facepiece are also disclosed.

Respirator facepiece with thermoset elastomeric face seal

Full-face respirator lens

Two position pressure demand inlet port adaptor

Inlet port adaptor on a full-face respirator lens

A full face respirator mask (10) includes a face shield portion (12) with the seal (20) surrounding a lens portion (14). Inhalation ports (16) and an exhalation port (18) are formed at the lower portion of the lens (14). A center adapter (30) includes a nose cup (40) and an exhalation valve (38) in the center orifice (18). The inhalation ports (16,116) are placed at each side of the exhalation port (18) and include connector portions (50,150) formed with the lens (14) or ultrasonically welded to the lens (14). The connector portions (50) include male connectors (58) in a first embodiment and female connectors (150) in a second embodiment receiving complementary formed connectors of a breathable air source.

Full face respirator mask having integral connectors disposed in lens

Full face respirator lens

Full face respirator

Growing community of inventors

North St. Paul, MN, United States of America

David P Knivsland