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| Number | Title | Issue Date |
| 8066006 | Filtering face-piece respirator having nose clip molded into the mask body A filtering face-piece respirator 10 that comprises a mask body 12 and a harness 14. The mask body 12 includes (i) a filtering structure 18, (ii) a plastic support structure 16, and (iii) a nose clip 19 that is secure... | 11/29/2011 |
| 7836887 | Protective mask A personalized protective mask comprises a malleable wire frame, a filtration bag, and a tether. The filtration bag is positioned over the wire frame and the tether is attached at each end to an ear section of the wire frame. The mask is placed over the face of the ... | 11/23/2010 |
| 7334579 | Low resistance to flow filter The present invention discloses a seamless pad-type filter which is characterized in that it comprises two co-extensive sides, a top side and a bottom side. The top and bottom sides are made of fluid filtration material. The two sides create an inner chamber therebe... | 02/26/2008 |
| 7320722 | Respiratory protection device that has rapid threaded clean air source attachment A personal respiratory protection device 10 that comprises a mask body 12 that has a structure 35 located on it for receiving a clean air supply source such as a filter cartridge 14. The clean air receiving structure 35 has a first... | 01/22/2008 |
| 7263996 | Anion emission and anti-dust nose mask The present invention relates to an anion emission and anti-dust nose mask capable of enhancing a compatibility so that it is well adapted to various sizes and types of nose based on its flexibility, and it is possible to wear without any string based on a pressure ... | 09/04/2007 |
| 7131442 | Fibrous filtration face mask A face mask for filtering contaminants from the air. The face mask includes a harness for securing the mask over the nose and mouth of the wearer and a nonwoven fibrous layer attached to the harness. The nonwoven fibrous layer contains at least 40 weight percent the... | 11/07/2006 |
| 7086401 | Respiratory mask with inserted spacer A respiratory mask that conforms to N95 performance and other high performance standards with improved air permeability for improved air circulation. The respiratory mask has a mask body and a headband for putting on the respiratory mask to the face of a wearer, the... | 08/08/2006 |
| 7086400 | Mask A mask comprising a mask main body and a face seal, wherein the outer periphery part of the main body and the outer periphery part of the face seal are adhered, said face seal is composed of a sheet prepared by laminating soft resin such as polyurethane resin on one... | 08/08/2006 |
| 6998009 | Filter and method of fabricating A method of making a filter includes the steps of: providing a substrate having a porous surface; applying to the porous surface a coating of dry powder comprising particles to form a filter preform; and heating the filter preform to bind the substrate and the parti... | 02/14/2006 |
| 6968844 | Mask cover A cover, for a flexible patient breathing mask, which is made predominantly of a soft material and has an open bottom and an internal shape corresponding to the external shape of a patient mask. The cover has a socket piece opening opposite the open bottom. The sock... | 11/29/2005 |
| 6959709 | Manner of attaching component elements to filtration material such as may be utilized in respiratory masks A component is attached to filtration material by providing the component with a deformable extension member that is preferably integral with the component and that extends from a base portion of the component. The extension member is inserted through an opening pro... | 11/01/2005 |
| 6948499 | Easy gripping face mask A cup-shaped face mask sized to fit over the nose and mouth of a wearer is disclosed. The face mask includes an inside surface, an outside surface, and a tab disposed on and extending outwardly from the outside surface, where the tab is adapted for gripping. ... | 09/27/2005 |
| 6945249 | Easy gripping face mask A face mask is disclosed. The face mask includes an inside surface, an outside surface having at least one edge, and at least one loop having a first end and a second end attached to the outside surface, where the loop is less than about 80 millimeters in length. | 09/20/2005 |
| 6923182 | Crush resistant filtering face mask A filtering face mask that includes a mask body that is adapted to fit over the nose and mouth of a person and a harness that is attached to the mask body. The mask body comprises i) a first shaping layer that has been molded; ii) a second shaping layer that has bee... | 08/02/2005 |
| 6783566 | Combination filter/cartridge assembly A filter cartridge assembly including a replendam that combines a particulate filter with an irregular shaped gas sorbent bed. Best operational practice requires that the air passing through the filter be distributed uniformly over the sorbent bed. The repledam dire... | 08/31/2004 |
| 6736138 | Seamless pad-type filter The present invention discloses a seamless pad-type filter which is characterized in that it comprises two co-extensive sides, a top side and a bottom side. The top and bottom sides are made of fluid filtration material. The two sides create an inner chamber therebe... | 05/18/2004 |
| 6729332 | Retention assembly with compression element and method of use A compression element and a retention assembly using the compression element to retain an article on a flexible substrate are disclosed. Also disclosed is a method of making an assembly including an article retained on a substrate by a compression element. The reten... | 05/04/2004 |
| 6712072 | Respirator mask The invention relates to a respirator mask which can be repeatedly fitted to different facial shapes. It consists of a mask base body and a support structure which supports the mask base body and can repeatedly be deformed plastically above a specific limit temperat... | 03/30/2004 |
| 6662803 | Nasal mask A CPAP system is described for improved respiratory therapy of patients. In particular a patient interface is disclosed with an outlet vent with lower noise levels and more diffused outlet flow over prior art outlet vents. The outlet vent includes a main ... | 12/16/2003 |
| 6394090 | Flat-folded personal respiratory protection devices and processes for preparing same Respiratory devices having first and second lines of demarcation bisected by a fold. The devices are capable of being folded in a first substantially flat configuration for storage (e.g., in a pocket) and are capable of being unfolded in a second ready-to... | 05/28/2002 |
| 6371116 | Method and apparatus for pressurizing a protective hood enclosure with exhaled air An air-impermeable hood having first and second substantially airtight seals adapted to encircle a portion of a wearer's body below the head, typically the neck. Continuously exhaled air from the wearer of the hood is channeled between the first and secon... | 04/16/2002 |
| 6363934 | Respirator filter protective cover The present invention is a protective spark cover for covering the exterior face of a filter for use with a respirator or the like. During metal welding, smelting and cutting operations and similar activities creating sparks, splatter and the like, expose... | 04/02/2002 |
| 6345620 | Flexible respirator filter The present invention provides a flexible respirator filter having substantially coextensive front and back portions of filter material which are sealed to each other along their periphery, forming a sealed edge. A flexible plastic frame is contained with... | 02/12/2002 |
| 6161540 | Respirator filter having a pleated filter layer The filter medium of the present invention includes a pleated filter layer and a flat filter layer adjacent to the pleated filter layer. Both the pleated filter layer and the flat filter layer may contain a thermoplastic material allowing the filter layer... | 12/19/2000 |
| 6116235 | Vapor retention assembly Methods and apparatus for the conservation of respiratory promoters following their pulmonary introduction are disclosed. In preferred embodiments the present invention provides methods and apparatus for reducing the loss of respiratory promoter, and part... | 09/12/2000 |
| 6055983 | Respirator filtration device A novel filtration device having a substantially rigid frame comprised of an outer peripheral band connected by a plurality of spacers to an inner breather tube, wherein filter pads are secured over both sides of the frame and separated by the spacers to ... | 05/02/2000 |
| 6041782 | Respiratory mask having comfortable inner cover web A respiratory mask 1 has a molded, cup-shaped, shape-retaining shell 10 on the concave side of which is a layer of filter material 11 and, on the concave side of the filter material, without any intermediate shape-retaining layer, a layer of nonwoven mate... | 03/28/2000 |
| 6016804 | Respiratory mask and method of making thereof A facepiece insert and facepiece combination suitable for use as a respiratory mask. The respiratory mask may be combined with air purifying cartridges or breathable gas sources such as oxygen reservoirs. The insert is molded flat with living hinges, and ... | 01/25/2000 |
| 5992414 | Respirator filter A deformable, pad-type filter is provided which does not have a frame but instead uses two filter elements, at least one having a non-planar configuration in a stress-free condition, which are preferably joined along an outer edge to form an inner chamber... | 11/30/1999 |
| 5909732 | Insert to provide conformal support for the reflective seal of an oxygen mask A mask insert to provide conformal support for the reflective seal of an oxygen mask comprising a formed rim made of a resiliently deformable material which is held in place beneath the reflective seal by a supporting framework which conforms to the conto... | 06/08/1999 |
| 5794617 | Face mask and retainer A retainer is provided for a face piece that has a generally triangular face shaped rim for forming a seal over user's face when the face piece is worn. The retainer is made from a stiff material and has a rim that conforms to the rim of the face piece, a... | 08/18/1998 |
| 5763078 | Filter having corrugated nonwoven webs of polymeric microfiber A filter that is capable of removing particulate and gaseous contaminants from a fluid, which filter comprises: a first filter element that is capable of removing particulate contaminants from a fluid, the first filter element comprising a corrugated nonwoven ... | 06/09/1998 |
| 5727544 | Mask maintaining warmth in nasal area A simple and effective mask maintaining warmth in the nasal area is disclosed for preventing, relieving, or eliminating the occurrence of the symptoms of allergic nasal inflammation due to hay fever or the like. The mask maintaining warmth in the nasal ar... | 03/17/1998 |
| 5701892 | Multipurpose face mask that maintains an airspace between the mask and the wearer's face A multipurpose face mask made of supple material covers the nose, mouth, and chin with a two sided chamber held away from the entrance of the nostrils and the mouth by a rigid support attached inside the vertical front fold. This rigid support makes possi... | 12/30/1997 |
| 5592937 | Respirator mask with stiffening elements The present invention provides a respirator mask having a very soft, compliant facepiece that has several stiffening elements integrated therein. The respirator mask preferably includes an exhalation valve and a pair of filter cartridges. It also has a yo... | 01/14/1997 |
| 5558089 | Respirator nose clip A nose clip 12 useful for fitting a respirator 10 over a person's nose. The nose clip 12 includes a non-linear strip 18 that has first and second wings 20 and 22 and a midsection 24. There are first, second, and third inflections 26, 28, and 30 disposed, ... | 09/24/1996 |
| 5503141 | Microphone mounting structure for a sound amplifying respirator A microphone mounting structure for mounting a microphone to a respiratory mask through a hole in the respiratory mask. The microphone mounting structure is thus able to convert a conventional respiratory mask into a sound amplifying respiratory mask. The... | 04/02/1996 |
| 5374458 | Molded, multiple-layer face mask A molded, cup-shaped face mask especially useful for medical and dental personnel has a first, second and third layer. Edge portions of the layers are substantially free of adhesion to one another, and outer edges of the mask are free of any peripheral se... | 12/20/1994 |
| 5307796 | Methods of forming fibrous filtration face masks A method of forming a cup-shaped, non-woven fibrous shaping layer for a filtering face mask. The method includes the steps: (a) heating a non-woven fibrous web that contains at least 40 weight percent thermally bonding fibers, where at least 10 weight per... | 05/03/1994 |
| 5154168 | Respirator mask A respirator mask with connection openings for filters and a mask body, which is designed as a full mask or as a half mask, is improved such that subsequent conversion into one respirator mask configuration or another will be simplified and possible witho... | 10/13/1992 |
