Patents Assigned to Markel Corporation
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Patent number: 9908087Abstract: A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: August 12, 2013Date of Patent: March 6, 2018Assignee: Markel CorporationInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Patent number: 9908088Abstract: A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: August 12, 2013Date of Patent: March 6, 2018Assignee: Markel CorporationInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Patent number: 9248411Abstract: A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: August 12, 2013Date of Patent: February 2, 2016Assignee: Markel CorporationInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Patent number: 9248412Abstract: A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: August 12, 2013Date of Patent: February 2, 2016Assignee: Markel CorporationInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Patent number: 9061251Abstract: A tubular membrane module and its method of manufacture are disclosed wherein tubular membranes form an interference self-sealing fit with hard tube sheets with the aid of a hard hollow mandrel inserted at the end of the tubular membranes. The tubular membranes are comprised of porous, compressible PTFE and/or fluorocopolymers. The self-sealing method described herein requires no heat treatment, allows for ease of manufacture without destruction of the tubular membranes and without the processing complexity of utilizing any additional potting agent, extrusion, or chemical cross-linking of any polymeric adhesives. The self sealing PTFE tubular membranes have superb chemical resistance and temperature resistance, and through the benefits of this invention, offer higher pullout resistance than typically observed with potting materials such as polyurethane and epoxy.Type: GrantFiled: September 27, 2011Date of Patent: June 23, 2015Assignee: Markel CorporationInventors: Kenneth Donald Hobbs, Robert Edward Jerman, Charles Edward Wolanski
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Publication number: 20150041389Abstract: A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: August 12, 2013Publication date: February 12, 2015Applicant: MARKEL CORPORATIONInventors: Robert E. Jerman, Cornelius Brown, JR., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Publication number: 20140042077Abstract: A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: August 12, 2013Publication date: February 13, 2014Applicant: MARKEL CORPORATIONInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Publication number: 20140042076Abstract: A hollow fiber membrane fluid transport device is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting of the device utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: August 12, 2013Publication date: February 13, 2014Applicant: MARKEL CORPORATIONInventors: Robert E. Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Publication number: 20140041788Abstract: A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: August 12, 2013Publication date: February 13, 2014Applicant: MARKEL CORPORATIONInventors: Robert E. Jerman, Cornelius Brown, JR., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Publication number: 20140041789Abstract: A hollow fiber membrane fluid transport device's method of manufacture is disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluoropolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: August 12, 2013Publication date: February 13, 2014Applicant: MARKEL CORPORATIONInventors: Robert E. Jerman, Cornelius Brown, JR., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Patent number: 8540081Abstract: A hollow fiber membrane fluid transport device and its method of manufacture are disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: March 16, 2011Date of Patent: September 24, 2013Assignee: Markel CorporationInventors: Robert Edward Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
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Publication number: 20090229401Abstract: Disclosed are cable assemblies, liners for cable assemblies and methods for making same. The liner in preferred embodiments comprises bearing surface with inwardly projecting surfaces, preferably at substantially regularly spaced intervals along the inner circumference of the bearing surface.Type: ApplicationFiled: March 18, 2009Publication date: September 17, 2009Applicant: Markel CorporationInventors: Kim Reynolds, Charles P. Marino, Kevin Kray
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Publication number: 20090193926Abstract: Disclosed is cable assemblies, liners for cable assemblies and method for making same. The liner (52) in preferred embodiments Comprises bearing surface with inwardly projecting surfaces (52B), preferably at substantially regularly spaced intervals along the in Circumference of the bearing surface.Type: ApplicationFiled: June 21, 2006Publication date: August 6, 2009Applicant: Markel CorporationInventors: Kim Reynolds, Charles P. Marino, Kevin Kray
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Publication number: 20060053945Abstract: Disclosed are cable assemblies, liners for cable assemblies and methods for making same. The liner in preferred embodiments comprises a multi-wall or multi-layer arrangement having a first wall or layer disposed in operative relationship to the motion transmitting member of assembly and a second wall or layer substantially surrounding the inner wall or layer wherein the outer layer comprises thermoplastic elastomer of a type and thickness effective to substantially improve the noise rating of the structure.Type: ApplicationFiled: July 13, 2004Publication date: March 16, 2006Applicant: Markel CorporationInventors: Kim Reynolds, David Panish
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Patent number: 6617516Abstract: A lead wire for use with an oxygen sensor is disclosed. The wire is formed of a center strand having high tensile strength surrounded by a plurality of first strands having high electrical conductance and a plurality of second strands having high tensile strength. The first and second strands are surrounded by a plurality of third strands having high electrical conductance and arranged in groups, and a plurality of fourth strands having high tensile strength, each fourth strand being positioned between two groups of third strands. The second and fourth strands are spaced at equal separation angles around the center strand.Type: GrantFiled: August 12, 2002Date of Patent: September 9, 2003Assignee: Markel CorporationInventors: Kim A. Reynolds, David J. Panish
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Patent number: 6062271Abstract: An abrasion resistant tubular article comprising poly(4-methyl-1-pentene) having high frictional efficiency over wide temperature and load conditions. The article of the present invention is particularly well adapted for use in motion transmitting cable assemblies and the like.Type: GrantFiled: May 22, 1998Date of Patent: May 16, 2000Assignee: Markel CorporationInventors: Kim A. Reynolds, Charles P. Marino
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Patent number: 6040384Abstract: This invention relates generally to cable assemblies, and more particularly to flexible cable assemblies of the type used in automobiles for transmitting rotary or linear motion along a predetermined path. In a particular aspect, the present invention relates to abrasion-resistant fluorocarbon polymer composites, such as polytetrafluoroethylene ("PTFE") composites, having an unexpectedly high frictional efficiency under high load conditions and after long cycle times. The present invention relates to abrasion-resistant, anti-friction tubing formed from such composites, and to uses of such tubing as a liner for flexible, motion transmitting cable assemblies.Type: GrantFiled: April 17, 1997Date of Patent: March 21, 2000Assignee: Markel CorporationInventors: Kim A. Reynolds, Charles P. Marino, Kevin P. Kray
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Patent number: 5964251Abstract: An improved conduit for transporting fuel and/or fuel vapor or a motion transmitting member in an automobile comprising an inner tube comprised of fluorocarbon polymeric material and having an inner surface for contacting and containing fluids or a motion transmitting member, and a chemically etched outer surface having a substantial portion of the fluorine of the fluorocarbon polymer substituted by a polar moiety. The conduit further includes an outer tube comprising an inner surface comprised of polymeric material containing sufficient polar groups such that hydrogen bonding at the interface between the outer surface of the inner tube and the inner surface of the outer tube prevents substantial relative separation of or movement between the inner and outer tubes.Type: GrantFiled: April 2, 1997Date of Patent: October 12, 1999Assignee: Markel CorporationInventors: Kim A. Reynolds, Charles P. Marino
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Patent number: 5653266Abstract: An improved conduit for transporting fuel and/or fuel vapor or a motion transmitting member in an automobile comprising an inner tube comprised of fluorocarbon polymeric material and having an inner surface for contacting and containing fluids or a motion transmitting member, and a chemically etched outer surface having a substantial portion of the fluorine of the fluorocarbon polymer substituted by a polar moiety. The conduit further includes an outer tube comprising an inner surface comprised of polymeric material containing sufficient polar groups such that hydrogen bonding at the interface between the outer surface of the inner tube and the inner surface of the outer tube prevents substantial relative separation of or movement between the inner and outer tubes.Type: GrantFiled: October 11, 1994Date of Patent: August 5, 1997Assignee: Markel CorporationInventors: Kim A. Reynolds, Charles P. Marino
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Patent number: 5573039Abstract: Hoses are provided which are resistant to chemical and thermal attack and which include a polymeric liner having an integral resilient member axially located along its wall. The resilient member includes a tensile strength which is significantly greater than the polymeric material of the liner, so as to minimize the incidence of plastic deformation and kinking during manufacture, installation, and use.Type: GrantFiled: March 2, 1995Date of Patent: November 12, 1996Assignee: Markel CorporationInventor: Warren Mang