Static Discharge Patents (Class 152/DIG2)
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Patent number: 6070630Abstract: The invention relates to a rubber tire composed of carbon black reinforced rubber carcass and having a rubber tread which is composed of a unitary, co-extrusion of tread cap, base and miniwings and, wherein a portion of the miniwings extend as a thin layer over a portion of the tread cap's outer surface to create a path of reduced electrical resistivity.Type: GrantFiled: July 19, 1996Date of Patent: June 6, 2000Assignee: The Goodyear Tire & Rubber CompanyInventors: Manuela Pompei, Ghislain Adolphe Leon Thise, Jean Bergh, Georges Clement
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Patent number: 6044882Abstract: The invention relates to a rubber tire composed of carbon black reinforced rubber carcass and having a rubber tread which is quantitatively reinforced with silica and which, in turn, has a thin, integral, rubber outer cap on its outer surface which contains a quantitative amount of carbon black. In one aspect, said outer cap, sometimes referred to herein as an outer top cap, extends across the outer surface of the tread which is normally intended to be ground contacting and in an alternative aspect, the outer top cap extends only over the outer portion, namely the peripheral edges, of said tread surface intended to be ground contacting. The outer, carbon black reinforced, rubber tread top cap connects with at least one other carbon black reinforced rubber component of the tire in a manner to provide a path of reduced electrical resistance from said outer tread top cap to the bead portion of the tire carcass and, therefore, such a path from the vehicle to the road surface.Type: GrantFiled: March 7, 1995Date of Patent: April 4, 2000Assignee: The Goodyear Tire & Rubber CompanyInventors: Michael Julian Crawford, Donald George Vera, Douglas Blair Dotts
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Patent number: 5942069Abstract: A pneumatic vehicle tire comprising a tread strip which forms the tire tread and is made from an electrically insulating or poorly conducting material and comprising, beneath the tread strip, a layer which is a good electrical conductor wherein, in order to bring about an adequate dissipation of electrical charge from the vehicle bodywork, the layer which is of good electrical conductivity extends at least regionally up to and into the tire running surface when considered over the circumference of the tire.Type: GrantFiled: December 20, 1995Date of Patent: August 24, 1999Assignee: SP Reifenwerke GmbH.Inventors: Manfred Gerresheim, Eduard Ditzel, Jurgen Schomburg, Wilhelm Endres, Hubert Leinweber
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Patent number: 5937926Abstract: A tire tread comprising an elongated tread strip of tire tread compound of high resistivity having a transverse width (TR) and, within the transverse width (TR) at least one longitudinally extending conducting strip of low resistivity tire compound with a volume resistivity less than 10.sup.8 ohm-cm, the at least one conducting strip extending from the top to the bottom surface of a tread strip.Type: GrantFiled: September 11, 1997Date of Patent: August 17, 1999Assignee: Sumitomo Rubber Industries LimitedInventor: Brian David Willamd Powell
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Patent number: 5898047Abstract: The invention relates to a rubber tire having a rubber tread intended to be ground-contacting which is relative electrically insulating and which has at least one thin, narrow, carbon black reinforced rubber strip integral the outer surface, or face, of said tread, each strip extending laterally across the tread to each of the tire's carbon black reinforced sidewalls.In one aspect, said outer rubber strip, extends laterally across the outer surface of the tread which is designed to be ground contacting and connects with carbon black reinforced tire sidewalls to provide a path of reduced electrical resistance from the outer surface of the tire tread to the bead portion of the tire carcass and, thereby, such a reduced electrical resistance path from a vehicle to the road surface.In another aspect, the said rubber tread intended to be ground-contacting, is primarily reinforced with silica.Type: GrantFiled: September 23, 1996Date of Patent: April 27, 1999Assignee: The Goodyear Tire & Rubber CompanyInventors: John Alan Howald, Gary Bruce Garber, Marc Christopher Nowacki
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Patent number: 5718781Abstract: The invention relates to a rubber tire composed of carbon black reinforced rubber carcass and having a rubber tread which is quantitatively reinforced with silica and contains a minor amount of carbon black reinforcement and/or carbon fibers. When said tread contains silica and carbon black reinforcement exclusive of carbon fibers, the said tread has a thin rubber layer over at least a portion of the outer surface tread intended to be ground-contacting wherein said rubber layer contains a combination of silica and/or carbon black reinforcement and carbon fibers. In one aspect, such alternative outer rubber layer (a) extends across at least a portion of the outer surface of the tread intended to be ground contacting and (b) contacts at least one other carbon black reinforced rubber component of the tire to provide a path of relatively low electrical resistance from said quantitatively silica reinforced tread to the bead portion of the tire carcass.Type: GrantFiled: June 7, 1995Date of Patent: February 17, 1998Assignee: The Goodyear Tire & Rubber CompanyInventors: John Joseph Andre Verthe, Joseph Kevin Hubbell, Gregory Martin Holtzapple
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Patent number: 5591278Abstract: A new type of wheel for tube transport is proposed characterized by the fact that is made of a rigid polymer material like high impact nylon which has uniformly distributed in it a solid lubricant like Teflon, MOS2 or graphite, by this reducing the hysteresis, fatigue in the mass and decreasing the rolling coefficient when rolling on a curved profile; also in the said polymer material existing fibres for reinforcing and static dissipation.Type: GrantFiled: October 5, 1994Date of Patent: January 7, 1997Inventor: Mihail I. Marcu
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Patent number: 5518055Abstract: The tire of this invention has a silica-rich tread compound for excellent rolling resistance and tread wear properties. The tire is made to be conductive such that electrostatic charges on the vehicle can be quickly dissipated when the vehicle stops. An electrostatic discharge ring is located on at least one shoulder portion of the tire and has a relatively low volume resistivity, on the order of 100 megohm centimeter. The discharge ring is positioned to make contact with a conductive sidewall portion of the tire. The overall resistivity of the tire from the rim to the ground surface is made to be less than about 100 megohms.Type: GrantFiled: September 20, 1994Date of Patent: May 21, 1996Assignee: Michelin Recherche et Technique S.A.Inventors: Robert V. Teeple, Sid H. Bordelon, Dean B. Creech
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Patent number: 5173135Abstract: A radial tire for passenger cars constructed with a sidewall portion formed from a rubber composition having of a volume resistivity of not more than 10.sup.4 .OMEGA.cm. The composition is comprised essentially of a selected rubber and a selected carbon black of an electrically conductive type. The tire is highly resistant to staining with mud and dust while in running and also with dirt pickup during storage.Type: GrantFiled: November 21, 1991Date of Patent: December 22, 1992Assignee: The Yokohama Rubber Co., Ltd.Inventors: Akinori Tokieda, Tetsuji Kawazura
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Patent number: 5021918Abstract: To eliminate interference with radio reception, static electricity generated by a vehicle tire during operation can be dissipated by the retrofit attachment of one end of a spring wire to the wheel hub with insertion of the other end through a vent opening in the wheel bearing cap to contact the end face of the wheel mounting spindle to provide a conductive path to the vehicle frame without dismantling of the bearing seal.Type: GrantFiled: July 10, 1989Date of Patent: June 4, 1991Inventor: Ronald L. Maki
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Patent number: 4401145Abstract: A process and composition for applying and bonding an indicia which is curable at ambient temperatures to a cured elastomer substrate. The substrate is treated generally at ambient temperatures with organic oxidants selected from the group consisting of N-halosulfonamides, N-halohydantoins, N-haloamides, N-haloimides, and the various isomers of mono-, di-, and trichloroisocyanuric acid. The indicia which is generally a urethane polymer or prepolymer is blended with an amine curing agent. A polar solvent is added to the amine curing agent and the amine curable polymer or prepolymer composition and mixed with the resulting blend or mixture applied to the treated elastomer surface in the form of an indicia so that said polymer or prepolymer cures at ambient temperature and is bonded to said elastomer. The invention is particularly suitable for applying indicia to various elastomer articles such as tires, conveyor belts, hoses, floor mats, sporting goods, and the like.Type: GrantFiled: November 12, 1981Date of Patent: August 30, 1983Assignee: The Firestone Tire & Rubber CompanyInventor: Walter R. Hausch