Patents Assigned to Chemfab Corporation
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Patent number: 6425821Abstract: A fluid diffuser and a method for diffusing fluid are provided. In one preferred embodiment, the diffuser comprises a frame adapted to be connected to the end of fluid supply duct. Mounted within the frame is a pore-containing web. The web redirects fluid passing through the pores by changing the direction of the fluid upon exiting the web. Prescribed portions of the web can be blocked to expel fluid preferentially in one direction and expel fluid less in other directions. Other means for controlling the direction and flow of fluid upon exiting the web are provided, including changing the angle of fluid supply to the web, and placing a vane at the entrance to the web.Type: GrantFiled: March 10, 2000Date of Patent: July 30, 2002Assignee: ChemFab CorporationInventors: Keith G. Koerber, John Effenberger, Christopher Comeaux
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Patent number: 6417280Abstract: A blended solid composition is provided containing a fibrillatable microparticulate PTFE polymer in an unfibrillated state and at least one elastomeric and/or fluoroplastic component. The composition is useful in making microfiber-reinforced solid compositions and articles produced therefrom.Type: GrantFiled: April 6, 2001Date of Patent: July 9, 2002Assignee: Chemfab CorporationInventors: John A. Effenberger, Christopher M. Comeaux, Lawrence D. David, Timothy P. Pollock, Katherine M. Sahlin, Laura A. Socha, Richard L. Stone, John W. Verbicky
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Patent number: 6239223Abstract: A blended solid composition is provided containing a fibrillatable microparticulate PTFE polymer in an unfibrillated state and at least one elastomeric and/or fluoroplastic component. The composition is useful in making microfiber-reinforced solid compositions and articles produced therefrom.Type: GrantFiled: June 12, 1998Date of Patent: May 29, 2001Assignee: Chemfab CorporationInventors: John A. Effenberger, Christopher M. Comeaux, Lawrence D. David, Timothy P. Pollock, Katherine M. Sahlin, Laura A. Socha, Richard L. Stone, John W. Verbicky
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Patent number: 6194050Abstract: A composite of thermally non-adherent fluoropolymeric and non-fluoropolymeric components is created through the agency of a non-woven, fibrous binder interposed between and portionally embedded into both components. The fibers of the non-woven binder have a substantial portion of their length extending into both components and cross the interface at an angle that is substantially normal to the plane of embedment. The composite possesses good peel-adhesion behavior between the otherwise thermally non-adherent components.Type: GrantFiled: June 28, 1999Date of Patent: February 27, 2001Assignee: Chemfab CorporationInventors: Keith Gordon Koerber, James Michael McMartin, John Walter Verbicky, Jr., John Effenberger, J. George Drobny
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Patent number: 6139426Abstract: A molded plastic air diffusing screen in an air supply system provided for effectively diffusing or deflecting air supplied through a coreless or vane-free duct such that undesirable air turbulence and draft/currents are substantially diminished; more particularly, the novel plastic screen diffuser minimizes noise emanating from the penetrating air supply.Type: GrantFiled: March 10, 1998Date of Patent: October 31, 2000Assignee: Chemfab CorporationInventor: Keith G. Koerber
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Patent number: 6059655Abstract: A fabric air diffuser and a method for diffusing air are provided. The diffuser comprises a frame adapted to be connected to the end of an air supply duct. Mounted within the frame is a flat, open-weave, fabric sheet. The fabric sheet redirects and scatters air passing through the openings in the weave by changing the direction of the air upon exiting the sheet.Type: GrantFiled: November 20, 1997Date of Patent: May 9, 2000Assignee: Chemfab CorporationInventor: Keith Koerber
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Patent number: 5916659Abstract: A composite of thermally non-adherent fluoropolymeric and non-fluoropolymeric components is created through the agency of a non-woven, fibrous binder interposed between and portionally embedded into both components. The fibers of the non-woven binder have a substantial portion of their length extending into both components and cross the interface at an angle that is substantially normal to the plane of embedment. The composite possesses good peel strengths of greater than 5 pounds/linear inch between the otherwise thermally non-adherent components.Type: GrantFiled: January 14, 1996Date of Patent: June 29, 1999Assignee: Chemfab CorporationInventors: Keith Gordon Koerber, James Michael McMartin, John Walter Verbicky, Jr., John Effenberger, J. George Drobny
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Patent number: 5759924Abstract: An improved translucent architectural fabric reinforced fluoroplastic composite is described exhibiting a transmission of normally incident visible light of at least about 23%, and when subjected to 1:1 biaxial loads up to 25% of the uniaxial tensile breaking strength of the fabric, exhibits a biaxial elongation value in the warp direction that is greater than 0 but less than 1.0%, and a biaxial elongation value in the fill direction that is greater than biaxial elongation value in the warp direction but less than 10%.Type: GrantFiled: October 18, 1996Date of Patent: June 2, 1998Assignee: Chemfab CorporationInventor: Katherine Mary Sahlin
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Patent number: 5725427Abstract: A fabric air diffuser and a method for diffusing air comprises a frame adapted to be connected to the end of an air supply duct. Mounted within the frame is a flat, open-weave, fabric sheet. The fabric sheet redirects and scatters air passing through the openings in the weave by changing the direction and velocity of the air upon exiting the sheet.Type: GrantFiled: January 24, 1996Date of Patent: March 10, 1998Assignee: Chemfab CorporationInventor: Keith G. Koerber
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Patent number: 5357726Abstract: A flexible, reinforced textile composite material for constructing tensioned fabric structures, e.g. for sheltering from the outdoor environment, is disclosed. The material has a hydrophobic protective film element laminated to the textile composite material to provide enhanced hydrophobicity. In a preferred embodiment, of the invention, one or a mixture of colorants, dyestuffs or biological agents are incorporated into the hydrophobic protective film layer. The textile composite material has particular application as a tensioned architectural element for forming a dome, roof or the like, or as an electromagnetic window or a radome.Type: GrantFiled: August 31, 1993Date of Patent: October 25, 1994Assignee: Chemfab CorporationInventors: John A. Effenberger, Keith G. Koerber, Francis M. Enzien, Michael P. Cushman, Milton B. Punnett
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Patent number: 5238748Abstract: A multi-layer film of improved adhesive strength and other properties is made by combining a layer of polyimide and one or more layers of fluoropolymer selected from the group consisting of PTFE, thermally compatible TFE copolymers, blends thereof, PVF.sub.2, thermally compatible VF.sub.2 copolymers, blends thereof, PCTFE, thermally compatible CTFE copolymers, and blends thereof. It has been found that the peel adhesion between the polyimide layer and any fluoropolymer layer is greatly improved over known products. Laminated composites of improved adhesion and cohesion are made using such a multi-layer film and at least one fluoropolymer film. The fluoropolymer film is thermally weldable to the polyimide film.Type: GrantFiled: January 31, 1992Date of Patent: August 24, 1993Assignee: Chemfab CorporationInventors: John A. Effenberger, Keith G. Koerber, E. C. Lupton, Jr.
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Patent number: 5230937Abstract: A novel composite comprises a substrate having a coating matrix including an initial layer of a perfluoropolymer and an overcoat comprising a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or a combination thereof. The perfluoropolymer in the initial layer may be a perfluoroplastic, a perfluoroelastomer, or blends thereof. In a separate embodiment, the novel composite includes a substrate coated solely with one or more layers of perfluoroelastomer alone or as a blend with a perfluoroplastic. Where the substrate is not susceptible to hydrogen fluoride corrosion, the composite may include solely one or more layers of a blend of a fluoroelastomer and a hydrogen-containing perfluoroplastic. Cross-linking accelerators may be used to cross-link one or more of the resins contained in the coating layers. Each composite may be top-coated with a layer or layers of a fluoroplastic, fluoroelastomer, and/or a blend thereof.Type: GrantFiled: October 22, 1992Date of Patent: July 27, 1993Assignee: Chemfab CorporationInventors: John A. Effenberger, Frank M. Keese