Carboxylic Acid Ester Patents (Class 252/579)
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Publication number: 20110012071Abstract: A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material.Type: ApplicationFiled: September 23, 2010Publication date: January 20, 2011Applicant: Cooper Industries, Inc.Inventors: Kevin J. RAPP, Jerry L. CORKRAN, Gary A. GAUGER, C. Patrick MCSHANE
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Patent number: 7871546Abstract: In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided.Type: GrantFiled: December 21, 2009Date of Patent: January 18, 2011Assignee: Cooper Industries, Inc.Inventors: Jerry L. Corkran, Charles Patrick McShane, Kevin J. Rapp, Gary A. Gauger, Richard A. Harthun
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Publication number: 20100308283Abstract: Insulation fluids comprising polytrimethylene ether glycol esters are provided. The insulation fluids can be used in electrical apparatuses.Type: ApplicationFiled: August 20, 2010Publication date: December 9, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Lisa C. BATES, Hari Babu SUNKARA
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Patent number: 7833440Abstract: The invention relates to a high-performance dielectric oil comprising approximately 75 to 95% by volume of a naphthenic oil and approximately 5 to 25% by volume of an ester oil, in particular a synthetic ester oil and more preferably an oil of the family of polyolesters. The high-performance dielectric oil may be used in high-voltage electrical equipment such as power, measurement, distribution or traction transformers, tap changers, bushings, distributors, oil-immersed circuit breakers, power capacitors, cables, etc.Type: GrantFiled: May 24, 2005Date of Patent: November 16, 2010Assignee: Areva T&D SAInventors: Jean-Luc Bessede, Christophe Perrier, Abderrahmane Beroual
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Publication number: 20100243969Abstract: Provided is a use of a vegetable oil high in monounsaturates as dielectric and heat-transfer fluid in a device for the generation, storage, conversion and/or distribution of electrical energy.Type: ApplicationFiled: March 29, 2010Publication date: September 30, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: SERGE REBOUILLAT, Susan Knowlton
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Publication number: 20100065792Abstract: The present invention belongs to the field of dielectric fluids for electric systems, it specifically relates to a biodegradable dielectric fluid that is highly resistant to oxidation consisting of an oil or a mixture of vegetable oils with a very high oleic acid content which substantially conserve all their natural tocopherols and containing a metal deactivator, as well as to its use for insulating and cooling electrical equipment.Type: ApplicationFiled: March 16, 2007Publication date: March 18, 2010Inventor: Jesus Izcara Zurro
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Patent number: 7651641Abstract: In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided.Type: GrantFiled: October 12, 2004Date of Patent: January 26, 2010Assignee: Cooper Industries, Inc.Inventors: Jerry L. Corkran, C. Patrick McShane, Kevin J. Rapp, Gary A. Gauger, Richard A. Harthun
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Publication number: 20090194748Abstract: A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material.Type: ApplicationFiled: April 13, 2009Publication date: August 6, 2009Applicant: Cooper Industries, Inc.Inventors: Kevin J. Rapp, Jerry L. Corkran, Gary A. Gauger, C. Patrick McShane
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Publication number: 20090140830Abstract: Disclosed herein are a dielectric fluid composition and a method thereof. Also disclosed are viscosity modifiers and a method of lowering the viscosity of an oil-based dielectric fluid. The composition includes an oil with a high mono-unsaturated fatty acid content and one or more fatty acid alkyl esters, each having a fatty acid and an alkyl moiety, wherein the alkyl moiety of the fatty acid alkyl esters has 1 to 4 carbon atoms, and wherein both the oil and the fatty acid alkyl ester are in the range of 40%-60% v/v of the dielectric fluid composition. The viscosity modifier includes one or more fatty acid alkyl esters with an alkyl moiety and a fatty acid moiety, wherein the alkyl moiety has 1 to 4 carbon atoms. The method of lowering the viscosity includes blending the viscosity modifier and a vegetable oil-based dielectric fluid in a ratio of 40:60-60:40.Type: ApplicationFiled: April 11, 2008Publication date: June 4, 2009Applicant: BIOLECTRIC PTY LTDInventors: Mohammed Amanullah, Syed M. Islam, Samer Chami, Gary Ienco
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Publication number: 20090121200Abstract: Insulation fluids comprising polytrimethylene ether glycol esters are provided. The insulation fluids can be used in electrical apparatuses.Type: ApplicationFiled: November 12, 2007Publication date: May 14, 2009Inventors: Lisa C. Bates, Hari Babu Sunkara
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Patent number: 7524440Abstract: A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material.Type: GrantFiled: October 2, 2003Date of Patent: April 28, 2009Assignee: Cooper Industries, Inc.Inventors: Kevin J. Rapp, Jerry L. Corkran, Gary A. Gauger, C. Patrick McShane
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Publication number: 20080171136Abstract: A composition of matter and a structure fabricated using the composition. The composition comprising: a resin; polymeric nano-particles dispersed in the resin, each of the polymeric nano-particle comprising a multi-arm core polymer and pendent polymers attached to the multi-arm core polymer, the multi-arm core polymer immiscible with the resin and the pendent polymers miscible with the resin; and a solvent, the solvent volatile at a first temperature, the resin cross-linkable at a second temperature, the polymeric nano-particle decomposable at a third temperature, the third temperature higher than the second temperature, the second temperature higher than the first temperature, wherein a thickness of a layer of the composition shrinks by less than about 3.5% between heating the layer from the second temperature to the third temperature.Type: ApplicationFiled: March 24, 2008Publication date: July 17, 2008Inventors: Geraud Jean-Michel Dubois, James Lupton Hedrick, Ho-Cheol Kim, Victor Yee-Way Lee, Teddie Peregrino Magbitang, Robert Dennis Miller, Muthumanickam Sankarapandian, Linda Karin Sundberg, Willi Volksen
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Patent number: 7316793Abstract: Formulation of a liquid composition to form an electrical insulator, an antioxidant or a degreaser, obtained from the combination of by-products with mineral origin, whose formulation shall vary to meet different characteristics, becoming an electrical insulator, an antioxidant or a degreaser, ideal for different applications, the basic formula comprising: tetrachloroethylene, Mineral oil, methyl cellulose carboxy and 5 to 7% dipropylene glycol.Type: GrantFiled: February 21, 2001Date of Patent: January 8, 2008Inventor: Fabio Gozzi
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Patent number: 7048875Abstract: High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05% at 25NC, acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25NC, a flash point of at least 250NC and a pour point of at least ?15NC are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed. A process for preparing the high oleic acid triglyceride composition is disclosed.Type: GrantFiled: September 15, 2003Date of Patent: May 23, 2006Assignee: ABB Technology AGInventors: Thottathil V. Oommen, C. Clair Claiborne
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Patent number: 6994799Abstract: Disclosed are ester-containing fluid compositions, methods of making such compositions, and methods of using such compositions. The fluid compositions comprise a mix of branched and linear ester compounds, and the fluid compositions are characterized by certain performance limitations. The preferred method of making the fluid compositions enables the ester mix to be made in a one step process with little finishing required to obtain desirable performance characteristics.Type: GrantFiled: December 22, 2000Date of Patent: February 7, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Eddy Van Driessche, Georges Mathys, Richard H. Schlosberg, Christian Francois, Chris De Roover
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Patent number: 6905638Abstract: In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided.Type: GrantFiled: July 15, 2003Date of Patent: June 14, 2005Assignee: Cooper Industries, Inc.Inventors: Jerry L. Corkran, C. Patrick McShane, Kevin J. Rapp, Gary A. Gauger, Richard A. Harthun
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Patent number: 6726857Abstract: The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the present invention are particularly suited for use in sealed, non-vented transformers, and have improved performance characteristics, including decreased degradation of the paper insulating layers, as well as a greater degree of safety and environmental acceptability. The present dielectric coolants comprise relatively pure blends of compounds selected from the group consisting of aromatic hydrocarbons, polyalphaolefins, polyol esters, and natural vegetable oils, along with additives to improve pour point, increase stability and reduce oxidation rate.Type: GrantFiled: November 25, 2002Date of Patent: April 27, 2004Assignee: Cooper Industries, Inc.Inventors: Gary L. Goedde, Gary A. Gauger, John Lapp, Alan P. Yerges
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Patent number: 6645404Abstract: High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05% at 25 NC., acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25 NC., a flash point of at least 250 NC. and a pour point of at least −15 NC. are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed.Type: GrantFiled: August 10, 2001Date of Patent: November 11, 2003Assignee: ABB Technology AGInventors: Thottathil V. Oommen, C. Clair Claiborne
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Patent number: 6613250Abstract: In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided.Type: GrantFiled: April 4, 2002Date of Patent: September 2, 2003Assignee: Cooper Industries, Inc.Inventors: C. Patrick McShane, Jerry L. Corkran, Richard A. Harthun, Gary A. Gauger, Kevin J. Rapp
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Publication number: 20030060373Abstract: Non-polymeric drag reducing agents in the form of maleated fatty acids and the esters thereof and the organic, inorganic or amine salts thereof are described herein. These additives are useful to reduce drag in hydrocarbon fluids and multi-phase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream, nor is grinding (cryogenic or otherwise) of the additive necessary to form a suitable drag reducing agent. The drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated, or undesirable foaming.Type: ApplicationFiled: August 30, 2001Publication date: March 27, 2003Inventors: Vladimir Jovancicevic, Young Soo Ahn
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Patent number: 6495071Abstract: Provided is a method for creating fluid motion of an electro-sensitive movable fluid upon application of direct-current-voltage between two electrodes adjacent the fluid, the fluid having a conductivity &sgr;, and a viscosity &eegr; located inside a triangle in a graph showing a relation between a conductivity &sgr; plotted as abscissa, and a viscosity &eegr;, plotted as ordinate, of a fluid at the working temperature, said triangle having, as vertices, a point P indicated by the conductivity &sgr;=4×10−10 S/m and the viscosity &eegr;=1×100 Pa·s, a point Q indicated by the conductivity &sgr;=4×10−10 S/m and the viscosity &eegr;=1×10−4 Pa·s, and a point R indicated by the conductivity &sgr;=5×10−6 S/m and the viscosity &eegr;=1×10−4 Pa·s.Type: GrantFiled: July 21, 1999Date of Patent: December 17, 2002Assignee: New Technology Management Co., Ltd.Inventors: Shinichi Yokota, Yasufumi Otsubo, Kazuya Edamura
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Patent number: 6485659Abstract: The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the present invention are particularly suited for use in sealed, non-vented transformers, and have improved performance characteristics, including decreased degradation of the paper insulating layers, as well as a greater degree of safety and environmental acceptability. The present dielectric coolants comprise relatively pure blends of compounds selected from the group consisting of aromatic hydrocarbons, polyalphaolefins, polyol esters, and natural vegetable oils, along with additives to improve pour point, increase stability and reduce oxidation rate.Type: GrantFiled: June 16, 1998Date of Patent: November 26, 2002Assignee: Cooper Industries, Inc.Inventors: Gary L. Goedde, Gary A. Gauger, John Lapp, Alan Paul Yerges
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Patent number: 6398986Abstract: In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided.Type: GrantFiled: April 9, 1999Date of Patent: June 4, 2002Assignee: Cooper Industries, IncInventors: C. Patrick McShane, Jerry L. Corkran, Richard A. Harthun, Gary A. Gauger, Kevin J. Rapp
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Publication number: 20020049145Abstract: A vegetable oil-based electrically-insulating fluid. This fluid is environmentally-friendly and has a high flash point and a high fire point. The base oil is hydrogenated to produce maximum possible stability of the oil, or alternatively, is a higher oleic acid oil. The vegetable oils of the preferred embodiments are soybean or corn oils. The oil can be winterized to remove crystallized fats and improve the pour point of the base oil, without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability. The fluid is useful in electrical components such as transformers and transmission lines. The invention also provides methods for making the fluid and fluid-filled electrical components.Type: ApplicationFiled: September 10, 2001Publication date: April 25, 2002Inventors: Glenn S. Cannon, John A. Kotowski
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Patent number: 6352655Abstract: A dielectric fluid system for use in electrical equipment comprising a dielectric fluid comprising vegetable oil and an oxidation reducing composition encased in a housing composed of a polymeric material that is substantially permeable to oxygen. The oxidation reducing composition is placed inside the electrical equipment such that it is in contact with a headspace defined by the dielectric fluid. Devices generating and distributing electrical energy incorporating the above-described dielectric fluid system and method of retrofilling such devices also are provided.Type: GrantFiled: April 9, 1999Date of Patent: March 5, 2002Assignee: Cooper Industries, Inc.Inventors: Charles P. McShane, Jerry L. Corkran, Richard A. Harthun, Gary A. Gauger, Kevin J. Rapp
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Patent number: 6340658Abstract: A vegetable oil-based electrically-insulating fluid. This fluid is environmentally-friendly and has a high flash point and a high fire point. The base oil is hydrogenated to produce maximum possible stability of the oil, or alternatively, is a higher oleic acid oil. The vegetable oils of the preferred embodiments are soybean or corn oils. The oil can be winterized to remove crystallized fats and improve the pour point of the base oil, without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability. The fluid is useful in electrical components such as transformers and transmission lines. The invention also provides methods for making the fluid and fluid-filled electrical components.Type: GrantFiled: November 2, 2000Date of Patent: January 22, 2002Assignee: Wavely Light and PowerInventors: Glenn S. Cannon, John A. Kotowski
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Patent number: 6312623Abstract: High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05% at 25° C., acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25° C., a flash point of at least 250° C. and a pour point of at least —15° C. are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed.Type: GrantFiled: August 21, 1998Date of Patent: November 6, 2001Assignee: ABB Power T&D Company Inc.Inventors: Thottathil V. Oommen, C. Clair Claiborne
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Patent number: 6280659Abstract: A unique, fire resistant, environmentally safe insulating oil comprised of selected vegetable oils, fortified with additives to improve stability and low temperature viscosity characteristics. The electrical equipment comprises an oil-sealed tank, the insulating oil filling the tank, and electrical components such as a transformer, switch, or fuse immersed in the described oil. Also contemplated is a solid-liquid insulation system comprising porous insulating materials saturated with vegetable seed oil.Type: GrantFiled: February 28, 1997Date of Patent: August 28, 2001Inventor: David W. Sundin
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Patent number: 6274067Abstract: High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05% at 25° C., acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25° C., a flash point of at least 250° C. and a pour point of at least −15° C. are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed.Type: GrantFiled: May 28, 1999Date of Patent: August 14, 2001Assignee: ABB Power T&D Company Inc.Inventors: Thottathil V. Oommen, C. Clair Claiborne
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Patent number: 6245726Abstract: A soybean oil based electrically insulating fluid with a high flash point and a high fire point. The base oil is hydrogenated to produce maximum possible stability of the soybean oil, and can be winterized to remove crystallized fats and improve the pour point of the base oil without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability.Type: GrantFiled: August 9, 1999Date of Patent: June 12, 2001Assignee: Waverly Light and PowerInventors: Glenn S. Cannon, Lou A. T. Honary
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Patent number: 6207626Abstract: An environmentally prefered biobased soybean oil based electrically insulating fluid with a high flash point and a high fire point. The base oil is hydrogenated to produce maximum possible stability of the soybean oil, and can be winterized to remove crystallized fats and improve the pour point of the base oil without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability. The base oil is capable of conforming to the President's executive order 13101 of Sep. 14, 1998 for “Greening the Government Through Waste Prevention, Recycling, and Federal Acquisition.Type: GrantFiled: August 9, 1999Date of Patent: March 27, 2001Assignee: Waverly Light and PowerInventors: Glenn S. Cannon, Lou A. T. Honary
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Patent number: 6177031Abstract: A thixotropic dielectric fluid that includes vegetable oil, transformer oil, and a clay material. The thixotropic dielectric fluid is particularly suited for use in a capacitor.Type: GrantFiled: May 26, 1998Date of Patent: January 23, 2001Assignee: General Electric CompanyInventors: Michael G. Minnick, Patricia C. Irwin, Clive W. Reed
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Patent number: 6159913Abstract: A biodegradable soybean oil based electrically insulating fluid. The base oil is hydrogenated to produce maximum possible stability of the soybean oil, and can be winterized to remove crystallized fats and improve the pour point of the base oil without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability.Type: GrantFiled: June 18, 1999Date of Patent: December 12, 2000Assignee: Waverly Light and PowerInventors: Glenn S. Cannon, Lou A. T. Honary
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Patent number: 6048474Abstract: A dielectric fluid for the machining of metal by spark erosion which contains saturated aliphatic hydrocarbons with a proportion of aromatic hydrocarbons which is lower than one percent in weight and to which an additive is added, wherein organic substances from the group of anthraquinone derivatives are added as the additive in a concentration of maximally one percent in weight.Type: GrantFiled: May 21, 1997Date of Patent: April 11, 2000Assignee: Oel-Held GmbHInventors: Manfred Storr, Wilhelm Rehbein
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Patent number: 6030544Abstract: Provided is an electro-sensitive movable fluid composition which is comprised of a compound or a mixture of compounds which, at the working temperature of the fluid, has a conductivity .sigma., plotted as abscissa, and a viscosity .eta., plotted as ordinate, the triangle having, as vertexes, a point P indicated by the conductivity .sigma.=4.times.10.sup.-10 S/m and the viscosity .eta.=1.times.10.sup.0 Pa.S, a point Q indicated by the conductivity .sigma.=4.times.10.sup.-10 S/m and the viscosity n=1.times.10.sup.-4 Pa.S, and a point R indicated by the conductivity .sigma.=5.times.10.sup.-6 S/m and the viscosity .eta.=1.times.10.sup.-4 Pa.S. Also provided is a method for driving a rotor by producing a jet flow of the electro-sensitive movable fluid upon application of direct-current-voltage between two electrodes immersed in the fluid.Type: GrantFiled: January 31, 1997Date of Patent: February 29, 2000Assignee: New Technology Management Co., Ltd.Inventors: Shinichi Yokota, Yasufumi Otsubo, Kazuya Edamura
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Patent number: 5958851Abstract: A biodegradable soybean oil based electrically insulating fluid. The base oil is hydrogenated to produce maximum possible stability of the soybean oil, and can be winterized to remove crystallized fats and improve the pour point of the base oil without the necessity of heating the oil. The base oil can also be combined with an additive package containing materials specifically designed for improved pour point, improved cooling properties, and improved dielectric stability.Type: GrantFiled: May 11, 1998Date of Patent: September 28, 1999Assignee: Waverly Light and PowerInventors: Glenn S. Cannon, Lou A. T. Honary
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Patent number: 5949017Abstract: High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having the properties of a dielectric strength of at least 35 KV/100 mil gap, a dissipation factor of less than 0.05% at 25.degree. C., acidity of less than 0.03 mg KOH/g, electrical conductivity of less than 1 pS/m at 25.degree. C., a flash point of at least 250.degree. C. and a pour point of at least -15.degree. C. are disclosed. Electrical insulation fluids comprising the triglyceride composition are disclosed. Electrical insulation fluids that comprise the triglyceride composition and a combination of additives are disclosed. Electrical apparatuses comprising the electrical insulation fluids and the use of electrical insulation fluids to provide insulation in electrical apparatuses are disclosed.Type: GrantFiled: January 6, 1997Date of Patent: September 7, 1999Assignee: ABB Power T&D Company Inc.Inventors: Thottathil V. Oommen, C. Clair Claiborne
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Patent number: 5871673Abstract: An uninflammable insulating liquid is obtained by adding an emulsifying agent having a volume ratio of 1 to 3% to an insulating liquid containing a fluorocarbon liquid of at least 25% in a volume ratio to cause emulsification. In this liquid mixture, when polyol ester or polydimethylsiloxane is used as the insulating liquid, an uninflammable insulating liquid that does not cause pollution or an environmental problem can be obtained. When tricresyl phosphate is used as the insulating liquid, an uninflammable insulating liquid having a dielectric constant close to that of insulating paper can be obtained. A liquid pipe for circulating a fluorocarbon emulsion in a tank is provided outside the tank, and a pump and a stirrer are connected midway along the liquid pipe to constantly stir the fluorocarbon emulsion, thereby preventing it from being separated into two layers. When a radiator is provided to the liquid pipe, the stirring system for the fluorocarbon emulsion can also serve as the cooling system.Type: GrantFiled: December 29, 1995Date of Patent: February 16, 1999Assignee: Fuji Electric Co., Ltd.Inventor: Yoshitake Nakagami
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Patent number: 5851968Abstract: The electrical resistivity of hindered polyol ester lubricants can be raised to very high levels by treating the lubricants with activated alumina, preferably after the acid values of the lubricants treated have already been reduced to low levels by conventional refining with alkali or other acid scavengers.Type: GrantFiled: November 3, 1995Date of Patent: December 22, 1998Assignee: Henkel CorporationInventor: Nicholas E. Schnur
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Patent number: 5800731Abstract: Homogeneous, electro-viscous fluids are provided which contain aluminum soaps based on products obtained by reacting one or more mono- or polycarboxylic acid(s) or the anhydrides or semi-esters thereof with reactive aluminum compounds, such as aluminum alcoholates. The aforesaid fluids manifest high electro-rheological effect and are completely homogeneous, and do not require a dispersant.Type: GrantFiled: June 11, 1996Date of Patent: September 1, 1998Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Dietrich Pirck, Hans-Dieter Grasshoff, Harald Kohnz, Peter Finmans, Tobias Carstensen, Dieter Jakubik, Wilfried Weber, Dieter Winkler
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Patent number: 5672298Abstract: An electro-sensitive composition comprising a fluorine compound having a predetermined structure, and an electrically insulating medium capable of dissolving this fluorine compound when a voltage is applied thereto, is disclosed. This electro-sensitive composition has a straight chain or cyclic fluorocarbon, and fluorine compound particles possessing dissociable polarity, dispersed in an electrically insulating medium; by means of the application of a voltage to this electro-sensitive composition, the transparency and viscosity thereof can be easily adjusted.Type: GrantFiled: January 29, 1996Date of Patent: September 30, 1997Assignee: Fujikura Kasei Co., Ltd.Inventors: Kazuya Edamura, Yasufumi Otsubo
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Patent number: 5580265Abstract: Disclosed are sealant compositions having excellent slump and spew resistant, even at relatively high operating temperatures for electrical connectors. The sealants, which are flowable at such elevated temperatures, comprise two essential components: elastomeric thermoplastic polymer, preferably an organic polymer composite comprising diblock and triblock copolymers, and extender for the polymer. The extender may comprise a primary and a secondary extender, such as polybutene oil and mineral oil, respectively.Type: GrantFiled: August 29, 1994Date of Patent: December 3, 1996Assignee: The Whitaker CorporationInventors: Francis F. Koblitz, Thomas J. Lynch, Ricky C. Mellinger
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Patent number: 5510058Abstract: An electro-sensitive composition comprising a fluorine compound having a predetermined structure, and an electrically insulating medium capable of dissolving this fluorine compound when a voltage is applied thereto, is disclosed. This electro-sensitive composition has a straight chain or cyclic fluorocarbon, and fluorine compound particles possessing dissociable polarity, dispersed in an electrically insulating medium; by means of the application of a voltage to this electro-sensitive composition, the transparency and viscosity thereof can be easily adjusted.Type: GrantFiled: June 29, 1994Date of Patent: April 23, 1996Assignee: Fujikura Kasei Co., Ltd.Inventors: Kazuya Edamura, Yasufumi Otsubo
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Patent number: 5332529Abstract: An electric discharge machine fluid has been discovered. The fluid comprises a naphthene oil and 0.15 to 0.50 wt % 1,6-hexamethylene bis(3,5-ditertiarybutyl-4-hydroxycinnamate). The fluid was found to increase the breakdown voltage of the fluid and to stabilize oxidative deterioration.Type: GrantFiled: March 5, 1992Date of Patent: July 26, 1994Assignee: Texaco Inc.Inventors: Theodore C. Mead, Douglas H. Culpon, Jr.
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Patent number: 5252240Abstract: Disclosed are electrorheological fluids including vermiculite treated with an amine salt, methods of making the same, propylene carbonate adsorbed on the solid phase, butyl benzoate added for the liquid phase, and methods of using frequency response of electrorheological fluids to vary apparent viscosity and to compensate for temperature.Type: GrantFiled: April 24, 1992Date of Patent: October 12, 1993Assignee: General Motors CorporationInventor: Elio Eusebi
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Patent number: 5186863Abstract: A non-toxic chlorine and fluorine free solvent having high dielectric strength and thus being useful for cleaning electrical and electronic equipment.Type: GrantFiled: July 29, 1992Date of Patent: February 16, 1993Assignee: U.S. Polychemical CorporationInventor: Thomas Mancini
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Patent number: 5159527Abstract: A dielectric liquid is provided comprising (a) a fluorinated, inert liquid, or a mixture of fluorinated, inert liquids and (b) a fluorine-containing, nonionic sulfonate ester or sulfonamide, such that the dielectric liquid has a dielectric constant intermediate or between that of component (a) and component (b) and the dielectric constant represents the relative amounts of the relatively lower dielectric constant of the fluorinated, inert liquid per se and the relatively higher dielectric constant of the sulfonate ester or sulfonamide per se and components (a) and (b) of the dielectric liquid are miscible with one another over the operating temperature range of the electrical device employing the dielectric liquid.Type: GrantFiled: December 5, 1991Date of Patent: October 27, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard M. Flynn
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Patent number: 5124079Abstract: The invention relates to mixtures of amidated fatty acids or derivatives thereof of the general formula ##STR1## wherein R' is absent or an alkyl group with 2-4 C-atoms, the average value of n is 0,5 to 3 and R represents a fatty acid radical with 14-24 C-atoms obtained from oils produced from the plant species `Brassica` with an eruca acid content lower than 5%.These products are good thickeners for surfactants and/or detergents. No nitrose compounds of (di)alkanolamines, which could present a health hazard, are formed in the thickeners according to the invention.Type: GrantFiled: March 1, 1990Date of Patent: June 23, 1992Assignee: DSM N.V.Inventors: Jacob K. Smid, Reinout H. van der Veen
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Patent number: 5081333Abstract: Rust inhibitors for electrical discharge machining solutions. Each preventive is composed of a fatty acid amide which has been obtained by dehydrating and condensing at least one fatty acid and at least one alkanolamine.Type: GrantFiled: March 13, 1990Date of Patent: January 14, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takeshi Yatomi, Takeshi Iwasaki, Kenzo Yokoyama, Masahiro Noda
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Patent number: 5014033Abstract: Novel dielectrically improved liquid compositions include at least one electrical insulating oil (A), e.g., benzyltoluene or oligomers thereof, and at least one aldehyde (B) containing at least six carbon atoms, or a functionally substituted such aldehyde, e.g., 3-ethoxy-4-hydroxybenzaldehyde.Type: GrantFiled: September 27, 1989Date of Patent: May 7, 1991Assignee: AtochemInventors: Pierre Jay, Noelle Berger