Patents by Inventor Gerhard Graab
Gerhard Graab has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20080020179Abstract: A floor covering is provided having a high slip resistance and including a base material which is substantially in sheet or tile form and is made of an elastomeric material and which has a slip-resistant surface containing granular particles. In order to provide ease of manufacture and processing of the floor covering, the granular particles are composed of a polymeric material having a hardness significantly greater than that of the elastomeric material.Type: ApplicationFiled: July 20, 2007Publication date: January 24, 2008Applicant: Carl Freudenberg KGInventors: Gerhard Graab, Gregor Grun, Jochen Schmitt
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Patent number: 7288308Abstract: A floor covering of an elastomer material having a textured surface having a plurality of unevenly distributed reliefs, which partially overlap one another and are of a rectangular or square shape having rounded corners and extents of between 1.2 and 6 mm, the height of the reliefs being between 0.01 mm and 0.1 mm.Type: GrantFiled: May 6, 2004Date of Patent: October 30, 2007Assignee: Carl Freudenberg KGInventors: Gerhard Graab, Alfons Butscher, Peter Spissinger
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Publication number: 20060121268Abstract: A composite panel having at least two directly contiguous layers or sections of filler-containing foamed plastics, which are each composed of thermoplastic cross-linked and closed-cell foamed material, having at least different hardness and/or color and/or density, and which are bonded to one another without the use of an adhesive. The manufacturing takes place by the foaming and cross-linking of plastic layers in a press. The composite panel is suitable for use in orthopedic technology.Type: ApplicationFiled: March 22, 2005Publication date: June 8, 2006Applicant: Carl Freudenberg KGInventors: Gerhard Graab, Juergen Schmitt, Manfred Noe
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Patent number: 6959652Abstract: A table- or workbench covering made of a first electrically conductive layer having a specific resistance in the range of 5×106 ?cm to 5×109 ?cm, and a second electrically conductive layer having a specific resistance in the range of 5×104 ?cm to 5×107 ?cm, the layers being made of rubber mixtures containing antistatic agents and/or electrically conductive particles and are calendered together as well as connected by vulcanization, and which have a sulfate content of <100 ?g/cm2, extractable using deionized water.Type: GrantFiled: October 15, 2002Date of Patent: November 1, 2005Assignee: Carl Freudenberg KGInventors: Hans-Michael Kühl, Gerhard Graab
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Publication number: 20040226244Abstract: A floor covering of an elastomer material having a textured surface having a plurality of unevenly distributed reliefs, which partially overlap one another and are of a rectangular or square shape having rounded corners and extents of between 1.2 and 6 mm, the height of the reliefs being between 0.01 mm and 0.1 mm.Type: ApplicationFiled: May 6, 2004Publication date: November 18, 2004Applicant: Carl Freudenberg KGInventors: Gerhard Graab, Alfons Butscher, Peter Spissinger
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Patent number: 6815042Abstract: A floor covering made up of at least two layers bonded to one another, including a bottom layer (2) of electrically conductive rubber arranged under a light-colored top layer (1) of rubber, where the top layer (1) is interrupted in partial areas distributed over its area in a pattern, and formed by electrically conductive rubber there. The top layer (1) is produced from a powder (1.1) of first particles (1.2) that are light in color and made of electrically insulating rubber, as well as second particles (1.3) embedded in it, which are made of electrically conductive, at least partially vulcanized rubber. The second particles (1.3) have a diameter D, determined by screen analysis, that is at least as great as the thickness D1 of the top layer and, for practical purposes, not greater than the total of the thicknesses of the top layer and the bottom layer D2. The first (1.2) and the second (1.3) particles are pressed together and to the bottom layer (2), without pores, and bonded by vulcanization.Type: GrantFiled: March 12, 2002Date of Patent: November 9, 2004Assignee: Carl Freudenberg KGInventors: Gerhard Graab, Klaus Heckel
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Publication number: 20040161589Abstract: A web-type floor covering made of vulcanized rubber that includes an elastic rubber web, the top side of which forms a decorative surface, first decorative particles being at least partially embedded in the rubber web so that the first decorative particles are visible from the top side, a transparent coating, in particular made of epoxy resin, being applied to the first decorative particles on at least part of their contact surface with the rubber web, the first decorative particles being preferably made of a different material from that used for the rubber web.Type: ApplicationFiled: February 13, 2004Publication date: August 19, 2004Inventors: Gerhard Graab, Klaus Heckel, Dieter Rischer, Gerhard Heidecke
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Publication number: 20040142163Abstract: An electrically conductive floor covering made of first particles of a polymer material which are surrounded with electrically conductive second particles and compressed in the intermediate space between the top and bottom sides of the floor covering, with the floor covering having at least one cut surface and the electrically conductive second particles forming conductive paths which connect the upper side and the lower side of the floor covering in an electrically conductive way, in which the first particles comprise at least one granulated elastomer material and form a matrix, in which the second particles form electric conductive paths along the particle boundaries of the first particles.Type: ApplicationFiled: January 9, 2004Publication date: July 22, 2004Inventors: Hans-Michael Kuhl, Gerhard Graab, Peter Platzer, Ralf Moller
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Patent number: 6709732Abstract: A web-type floor covering made of vulcanized rubber that includes an elastic rubber web, the top side of which forms a decorative surface, first decorative particles being at least partially embedded in the rubber web so that the first decorative particles are visible from the top side, a transparent coating, in particular made of epoxy resin, being applied to the first decorative particles on at least part of their contact surface with the rubber web, the first decorative particles being preferably made of a different material from that used for the rubber web.Type: GrantFiled: April 4, 2000Date of Patent: March 23, 2004Assignee: Firma Carl FreudenbergInventors: Gerhard Graab, Klaus Heckel, Dieter Rischer, Gerhard Heidecke
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Patent number: 6695999Abstract: A method to produce an electrically conductive floor covering made of first particles of a polymer material which are surrounded with electrically conductive second particles and compressed in the intermediate space between the top and bottom sides of the floor covering, with the floor covering having at least one cut surface and the electrically conductive second particles forming conductive paths which connect the upper side and the lower side of the floor covering in an electrically conductive way, in which the first particles comprise at least one granulated elastomer material and form a matrix, in which the second particles form electric conductive paths along the particle boundaries of the first particles.Type: GrantFiled: January 17, 2002Date of Patent: February 24, 2004Assignee: Firma Carl FreudenbergInventors: Hans-Michael Kühl, Gerhard Graab, Peter Platzer, Ralf Möller
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Publication number: 20030095394Abstract: A table- or workbench covering made of a first electrically conductive layer having a specific resistance in the range of 5×106 &OHgr;cm to 5×109 &OHgr;cm, and a second electrically conductive layer having a specific resistance in the range of 5×104 &OHgr;cm to 5×107 &OHgr;cm, the layers being made of rubber mixtures containing antistatic agents and/or electrically conductive particles and are calendered together as well as connected by vulcanization, and which have a sulfate content of <100 &mgr;g/cm2, extractable using deionized water.Type: ApplicationFiled: October 15, 2002Publication date: May 22, 2003Inventors: Hans-Michael Kuhl, Gerhard Graab
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Patent number: 6503424Abstract: A multicolored, patterned floor covering is disclosed along with a method for its manufacture. The floor covering is made of a sheeting which has a first color, and a granular material dyed differently from the sheeting which is embedded in the sheeting along at least in the area of the top side. The sheeting and the granular material consist of cross-linkable, elastomeric materials, the granular material comprising particles which have at least two subregions dyed differently from each other and from the sheeting. The quantity and color of the fractions of each component as selected so that the mixed color resulting from an homogeneous intermixing of all the components contained in the floor covering agrees with the first color.Type: GrantFiled: January 31, 2001Date of Patent: January 7, 2003Assignee: Firma Carl FreudenbergInventors: Gerhard Graab, Klaus Heckel, Dieter Rischer, Thorsten Nahe, Helmut Grünhag
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Publication number: 20020168500Abstract: A floor covering made up of at least two layers bonded to one another, including a bottom layer (2) of electrically conductive rubber arranged under a light-colored top layer (1) of rubber, where the top layer (1) is interrupted in partial areas distributed over its area in a pattern, and formed by electrically conductive rubber there. The top layer (1) is produced from a powder (1.1) of first particles (1.2) that are light in color and made of electrically insulating rubber, as well as second particles (1.3) embedded in it, which are made of electrically conductive, at least partially vulcanized rubber. The second particles (1.3) have a diameter D, determined by screen analysis, that is at least as great as the thickness D1 of the top layer and, for practical purposes, not greater than the total of the thicknesses of the top layer and the bottom layer D2. The first (1.2) and the second (1.3) particles are pressed together and to the bottom layer (2), without pores, and bonded by vulcanization.Type: ApplicationFiled: March 12, 2002Publication date: November 14, 2002Inventors: Gerhard Graab, Klaus Heckel
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Publication number: 20020102385Abstract: An electrically conductive floor covering made of first particles of a polymer material which are surrounded with electrically conductive second particles and compressed in the intermediate space between the top and bottom sides of the floor covering, with the floor covering having at least one cut surface and the electrically conductive second particles forming conductive paths which connect the upper side and the lower side of the floor covering in an electrically conductive way, in which the first particles comprise at least one granulated elastomer material and form a matrix, in which the second particles form electric conductive paths along the particle boundaries of the first particles.Type: ApplicationFiled: January 17, 2002Publication date: August 1, 2002Inventors: Hans-Michael Kuhl, Gerhard Graab, Peter Platzer, Ralf Moller
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Publication number: 20020006499Abstract: A homogeneous floor covering composed of elastomer, varicolored granular particles contains 3 to 20 percent by weight of a copolymer of ethylene, including at least one comonomer of vinyl esters of saturated carboxylic acids having up to 4 C-atoms in the acid group, or including at least one unsaturated mono- or dicarboxylic acid, or including at least one ester of unsaturated mono- or dicarboxylic acids having up to 8 C-atoms in the alcohol portion. In this context, the ethylene content of the copolymer is 40 to 95% percent by weight, the rest is comonomer, and the melt-flow index of the copolymer must lie between 0.1 and 50. A corresponding manufacturing process is specified.Type: ApplicationFiled: April 12, 2001Publication date: January 17, 2002Inventors: Hans-Michael Kuhl, Gerhard Graab, Klaus Heckel
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Publication number: 20010005542Abstract: A multicolored, patterned floor covering is disclosed along with a method for its manufacture. The floor covering is made of a sheeting which has a first color, and a granular material dyed differently from the sheeting which is embedded in the sheeting along at least in the area of the top side. The sheeting and the granular material consist of cross-linkable, elastomeric materials, the granular material comprising particles which have at least two subregions dyed differently from each other and from the sheeting. The quantity and color of the fractions of each component as selected so that the mixed color resulting from an homogeneous intermixing of all the components contained in the floor covering agrees with the first color.Type: ApplicationFiled: January 31, 2001Publication date: June 28, 2001Inventors: Gerhard Graab, Klaus Heckel, Dieter Rischer, Thorsten Nahe, Helmut Grunhag
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Patent number: 6251321Abstract: A homogeneous floor covering composed of elastomer, varicolored granular particles contains 3 to 20 per cent by weight of a copolymer of ethylene, including at least one comonomer of vinyl esters of saturated carboxylic acids having up to 4 C-atoms in the acid group, or including at least one unsaturated mono- or dicarboxylic acid, or including at least one ester of unsaturated mono- or dicarboxylic acids having up to 8 C-atoms in the alcohol portion. In this context, the ethylene content of the copolymer is 40 to 95% per cent by weight, the rest is comonomer, and the melt-flow index of the copolymer must lie between 0.1 and 50. A corresponding manufacturing process is specified.Type: GrantFiled: June 28, 1999Date of Patent: June 26, 2001Assignee: Carl FreudenbergInventors: Hans-Michael Kühl, Gerhard Graab, Klaus Heckel
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Patent number: 6221462Abstract: A multicolored, patterned floor covering is disclosed along with a method for its manufacture. The floor covering is made of a sheeting which has a first color, and a granular material dyed differently from the sheeting which is embedded in the sheeting along at least in the area of the top side. The sheeting and the granular material consist of cross-linkable, elastomeric materials, the granular material comprising particles which have at least two subregions dyed differently from each other and from the sheeting. The quantity and color of the fractions of each component as selected so that the mixed color resulting from an homogeneous intermixing of all the components contained in the floor covering agrees with the first color.Type: GrantFiled: February 17, 1995Date of Patent: April 24, 2001Assignee: Firma Carl FreudenbergInventors: Gerhard Graab, Klaus Heckel, Dieter Rischer, Thorsten Nahe, Helmut Grünhag
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Patent number: 5824735Abstract: A rubber moire floor covering is disclosed. The covering is produced by continuously feeding a screw-type short extruding machine having a length/diameter ratio of 6:1 with two or three varicolored strips of vulcanizable elastomeric material. The operating temperature is between 60.degree. C. to 100.degree. C. The elastomeric material leaves the extruder via a perforated disk having 200 to 600 cylindrical bore holes 3-5 mm in diameter. Each of the resulting strands is severed to produce segments that are 1 to 2 mm thick, the formed pieces are then cooled off on a section 4 meters to 6 meters long. Subsequently, the formed pieces are allowed to fall into the roll nip of a temperature controllable two-bowl calendar. The web of material leaving the calendar is fed to a continuous vulcanization installation and leaves it as finished floor covering. The material throughput rate in this continuous process may be varied from 700 kg/h up to 1300 kg/h.Type: GrantFiled: March 4, 1996Date of Patent: October 20, 1998Assignee: Firma Carl FreudenbergInventors: Gerhard Graab, Klaus Heckel, Alfons Butscher, Torsten Nahe
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Patent number: 5298210Abstract: The invention involves the use of about 1 to 4 %wt cured elastomer irregularly-shaped particles having a sieve size of about 0.7 mm +/-0.1 mm in uncured elastomer to suppress bubble formation without substantial loss of tensile strength, in calendered, cured elastomer products, such as, decorative or sealing sheet materials.Type: GrantFiled: December 13, 1990Date of Patent: March 29, 1994Assignee: Firma Carl FreudenbergInventors: Klaus Heckel, Herbert Arnold, Gerhard Graab