1
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Unidirectional fluid valve. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Karl G Hanson, July 5, 1994: US05325892 (72 worldwide citation)

An exhalation valve 14 for a filtering face mask 10 has a flexible flap 24 that makes contact with a curved seal ridge 30 of a valve seat 26 when the valve 14 is in the closed position. The curvature of the seal ridge 30 corresponds to a deformation curve exhibited by the flexible flap 24 when secur ...


2
Joseph G Reischel, Vaughn B Grannis, David P Knivsland: Full face respirator mask having integral connectors disposed in lens area. Minnesota Mining and Manufacturing Company, Gregory A Sebald, Karl G Hanson, July 20, 1999: US05924420 (57 worldwide citation)

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 ...


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Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Unidirectional fluid valve. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Karl G Hanson, April 23, 1996: US05509436 (28 worldwide citation)

An exhalation valve 14 for a filtering face mask 10 has a flexible flap 24 that makes contact with a curved seal ridge 30 of a valve seat 26 when the valve 14 is in the closed position. The curvature of the seal ridge 30 corresponds to a deformation curve exhibited by the flexible flap 24 when secur ...


5
James E Steffen, Vaughn B Grannis, Frank S Schroder: Heat exchanger. Minnesota Mining and Manufacturing Company, Kinney & Lange, March 5, 1991: US04997034 (26 worldwide citation)

A heat exchanger including a plate of heat conductive material having a first major face and second major face. An array of a plurality of integral heat transfer elements projecting from the first face and a fan to cause a flow of a heat transfer fluid past the heat transfer elements thereby transfe ...


6
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Filtering face mask that has a new exhalation valve. 3M Innovative Properties Company, Karl G Hanson, February 15, 2005: US06854463 (23 worldwide citation)

Filtering face mask 10 has a mask body 12 and an exhalation valve 14. The mask body 12 is adapted to fit over the nose and mouth of a person, and the exhalation valve 14 is attached to the mask body 12. The exhalation valve 14 has a valve seat 26 and a single flexible flap 24. The valve seat 26 incl ...


7
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Filtering face mask that has a new exhalation valve. 3M Innovative Properties Company, Karl G Hanson, January 18, 2005: US06843248 (21 worldwide citation)

A filtering face mask that comprises a mask body that is adapted to fit over the nose and mouth of a wearer, the mask body comprising a filtration layer through which inhaled air may pass before being inhaled by a wearer of the face mask; and an exhalation valve that is attached to the mask body, th ...


8
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Fibrous filtration face mask having a new unidirectional fluid valve. 3M Innovative Properties Company, Karl G Hanson, October 10, 2006: US07117868 (20 worldwide citation)

A filtering face mask that has a mask body and an exhalation valve. The mask body is adapted to fit over the nose and mouth of a wearer. The exhalation valve is attached to the mask body and has a valve seat that includes a seal surface and an orifice that is circumscribed by the seal surface. The v ...


9
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Method of making a filtering face mask that has an exhalation valve. 3M Innovative Properties Company, Karl G Hanson, December 25, 2007: US07311104 (11 worldwide citation)

A method of making a filtering face mask, which method includes the steps of: (a) providing (i) a valve seat that comprises an orifice and a seal surface, wherein the orifice allows air to pass therethrough and is surrounded by the seal surface, and (ii) a single flexible flap; (b) supporting the si ...


10
Daniel A Japuntich, Vaughn B Grannis, Harold J Seppala, Anthony B Ferguson: Fibrous filtration face mask having a new unidirectional fluid valve. 3M Innovative Properties Company, Karl G Hanson, September 30, 2008: US07428903 (7 worldwide citation)

A filtering face mask that has a mask body and an exhalation valve. The mask body is adapted to fit over the nose and mouth of a wearer. The exhalation valve is positioned on the mask body substantially opposite to a wearer's mouth. The exhalation valve comprises a valve seat that has a seal surface ...