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
Mark Magidson, Michael Forbes Scholey: Unidirectional fluid valve. Moldex Metric, Charles H Schwartz, April 11, 2000: US06047698 (40 worldwide citation)

A unidirectional fluid valve for use with a respirator includes a flexible flap initially formed as a flat resilient member. A valve body has a flat valve seat to support the flexible flap. The flexible flap is contoured to make contact with the valve seat when a fluid is not passing through the val ...


3
David L Braun: Unidirectional fluid valve. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, David W Anderson, June 19, 1990: US04934362 (37 worldwide citation)

The exhalation valve of a respiratory face mask, while taking up only a small area, can afford extraordinarily low pressure drop for easy breathing if constructed with a valve seat having a seal edge that defines an orifice and also forms a parabola in the plane bisecting the mask. Preferably the se ...


4
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
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 ...


6
Braun David L C O Minnesota Mi: Unidirectional fluid valve.. Minnesota Mining & Mfg, September 28, 1988: EP0284353-A2 (10 worldwide citation)

The exhalation valve (14) of a respiratory face mask (10), while taking up only a small area, can afford extraordinarily low pressure drop for easy breathing if constructed with a valve seat (16) having a seal edge (18) that defines an orifice (21) and also forms a parabola in the plane bisecting th ...


7
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 ...


8
Carlo Falcetti: Cooling apparatus for dot matrix printing head. Honeywell Information Systems Italia, Nicholas Prasinos, John S Solakian, April 1, 1986: US04579469 (6 worldwide citation)

A cooling apparatus for a dot matrix impact print head suitable for application in serial printers. The print head is mounted on a carriage sliding on guide bars for reciprocating movement thereon. A liquid filled container having an inlet and outlet is mounted on the carriage and is in thermal cont ...


9
Falcetti Carlo: Cooling apparatus for dot matrix impact print head.. Honeywell Inf Systems, October 2, 1985: EP0155975-A1 (4 worldwide citation)

Cooling apparatus for dot matrix impact print head suitable for application in serial printers, where the print head is mounted on a carriage (7) sliding on guiding bars (4, 5) for reciprocating movement thereon, comprising a liquid filled container (10) with inlet (11) and outlet (12) mounted on th ...


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, February 24, 2009: US07493900 (3 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 includes a valve seat that comprises a seal surface, an orifice that is circumscribed by the seal surface, a ...