Containing Fibrous Or Polycrystalline Refractory Oxide Patents (Class 523/153)
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Patent number: 5190991Abstract: A brake lining is made from a preform which has been formed by a compression step parallel to that surface of the brake lining preform which is to be the braking surface of the lining in use and has subsequently been compressed in a direction substantially normal to said surface to form the lining. The preform can be made by dewatering an aqueous slurry of the brake lining ingredients prior to the first compression step.Type: GrantFiled: November 1, 1990Date of Patent: March 2, 1993Assignee: Nuturn CorporationInventors: Euan Parker, Bruno Grele
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Patent number: 5182166Abstract: A wear-resistant composite structure which is especially suitable for use in the formation of sealing components, brake linings, electrical motor brushes, bearings, and like products, is disclosed. This composite structure includes as its primary component vitreous carbon in a continuous phase, and strengthening fibers interspersed throughout the vitreous carbon in a discontinuous phase. These fibers are individually convoluted in configuration, so as to improve the crack-resistance and other physical properties of the vitreous carbon. A suitable method of forming such wear-resistant composite structure is also disclosed.Type: GrantFiled: May 1, 1991Date of Patent: January 26, 1993Inventors: Ralph A. Burton, Ralph G. Burton
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Patent number: 5162395Abstract: A rubber composition which contains, in a matrix consisting mainly of rubber, irregularly shaped particles having high hardness, and subjected to surface treatment for improving their affinity for the matrix, or their adhesion to it.Type: GrantFiled: February 20, 1991Date of Patent: November 10, 1992Assignee: Bridgestone CorporationInventors: Hirotaka Yamazaki, Yasunori Fukuta, Yoshihide Fukahori
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Patent number: 5145888Abstract: Non-asbestos ion-polymer composite friction materials show high heat resistance and low wear, being especially useful for friction elements in brake shoes or blocks in automobiles and industrial machines. The non-asbestos ion-polymer composites are basically composed of a polyacrylonitrile fiber and an ion-polymer used as binder matrix. An optional friction modifier can be added to include, e.g., carbon, graphite and/or MoS.sub.2, etc. The ion-polymer is polymerized from alpha, beta-unsaturated-gamma-carbonyl monomers, e.g., acrylic acid, or esters thereof or their comonomers, directly onto the solid surface of divalent metal compounds, e.g., Ca, Sr, Ba, Zn salt(s) and/or oxide(s).Type: GrantFiled: October 26, 1989Date of Patent: September 8, 1992Inventors: Ke-Cheng Gong, Yang-Meng Ou, Gregory S. Yeh
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Patent number: 5122550Abstract: A non-asbestos friction material composition suitable for use as a friction element includes: a binder; a reinforcing material; and a structural integriy imparting amount of cellulose ester fibrils.Type: GrantFiled: November 21, 1990Date of Patent: June 16, 1992Assignee: Hoechst Celanese CorporationInventor: Thomas E. Schmitt
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Patent number: 5093388Abstract: A high friction brake shoe formulation having a high static friction coefficient in shear of about 1.5 and low adhesion to materials having microscopic pores therein in contact with said brake shoe formulation which comprises a mixture of about 75 phr of neoprene W rubber and about 25 phr of neoprene WHV rubber; a first curing system comprising about 1 phr of a fatty acid, about 5 phr of ZnO, and about 1-3 phr of MgO; and a second curing system comprising about 1.25 phr of sulfur and about 0.6 phr of a sulfur accelerator; together with about 50 phr of a reinforcing agent of N555 or N650 carbon black.Type: GrantFiled: March 28, 1989Date of Patent: March 3, 1992Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: John T. Siemon, Jr., Joseph F. Meier
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Patent number: 5041471Abstract: A non-asbestos friction material has a core group of fibers that is universally used in a plurality of friction material formulations to provide appropriate friction materials for different end uses. The universal core group is resistant to temperatures above 1000.degree. F. Friction materials made with the core group have the additional advantage of long wear. Polybenzimidazole (PBI) is an essential element of the core group of fibers because its friction level increases as the temperature increase. The other elements of the core group are aramid fibers, carbon fibers, and a high strength ceramic fiber.Type: GrantFiled: October 29, 1990Date of Patent: August 20, 1991Assignee: Braketech, IncorporatedInventor: Arpad E. Brinzey
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Patent number: 4954536Abstract: A brake-friction material comprising:(a) a base material having a fiber structure for giving a high mechanical strength and a high friction coefficient to the brake-friction material;(b) a lubricant for decreasing a wear of the brake-friction material;(c) a filler for giving a heat stability to the brake-friction material and helping friction characteristic of the brake-friction material; and(d) a bonding material composed;wherein the bonding material is composed of condensed polynuclear aromatic hydrocarbon resin.Type: GrantFiled: April 19, 1989Date of Patent: September 4, 1990Assignee: Tokico Ltd.Inventors: Teruyuki Komori, Shingo Miyake, Yoshio Senoo
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Patent number: 4920159Abstract: The present invention is a composition comprising a friction resistant filler and a cyanato group containing phenolic resin which has repeating units of the formula: ##STR1## wherein p is 0 or an integer of one or more, q is an integer of one or more, and X is a radical selected from the group consisting of: --CH.sub.2 --, --CO--, --SO.sub.2 --, ##STR2## with --CH.sub.2 -- preferred. R is the same or different and is selected from the group consisting of hydrogen and methyl radicals and composition based on phenolic triazine resins derived therefrom.Type: GrantFiled: January 11, 1989Date of Patent: April 24, 1990Assignee: Allies-Signal Inc.Inventors: Sajal Das, Dusan C. Prevorsek, Seong K. Rhee, William J. Bulger
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Patent number: 4918116Abstract: Improved high temperature resistant molding materials containing customary filler materials and additives and a carbon forming bonding agent which is a phenol novolac with a molar ratio of phenol to formaldehyde of 1 to 0.2 to 1 to 0.35 of high quality and free of solvents useful as refractory products, carbon materials, abrasive wheels, friction lining and the like.Type: GrantFiled: February 17, 1989Date of Patent: April 17, 1990Assignee: Rutgerswerke AGInventors: Arno Gardziella, Karl-Heinz Schwieger, Peter Adolphs, Josef Suren
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Patent number: 4886706Abstract: An improved fibrous polyacrylonitrile mixture for use in friction products enables the production of low resiliency preforms by mixing an additive with a polyacrylonitrile wet gel. The additive is incorporated into the fiber in extremely large amounts. The additive is a member selected from the group consisting of:(a) polyethylene glycol esters of pelargonic acid; or(b) polyethylene glycol esters of enanthic, caprylic or capric acids; or(c) blends of polyethylene glycol esters of enanthic, caprylic, pelargonic, or capric acids; or(d) blends of polyethylene glycol esters of carboxylic acids derived from natural products containing at least 50% by weight of carboxylic acids containing less than 14 carbon atoms; or(e) reaction products of ethylene oxide and carboxylic acid amides wherein at least 70% of the acids from which the amide is derived contain between 16 and 20 carbon atoms.Type: GrantFiled: March 11, 1987Date of Patent: December 12, 1989Assignee: BASF CorporationInventors: Hughey A. Rush, Billy B. Hibbard, Johnson L. Pursoo, John W. Lindsay, Thomas E. Smith, Kenneth Harper, MIchael V. Tullos, James E. Davis
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Patent number: 4866107Abstract: The addition of fibrillated acrylic fiber to non-asbestos type friction material compositions provides marked improvement in the flexural strength, stiffness and structural integrity of preforms used in the manufacture of friction elements. The consequent handling characteristics of the preform provide improvement in the manufacturing of the friction element.Type: GrantFiled: July 26, 1988Date of Patent: September 12, 1989Assignee: American Cyanamid CompanyInventors: Leigh T. Doxsee, Robert E. Evans, Michael P. O'Toole
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Patent number: 4861809Abstract: A friction material containing from about 0.5-29 wt % of carbonaceous fibers with a bond nitrogen content of from about 14 to 21 wt %, an auxiliary material and a thermosetting resin. The material has good wear and temperature resistance characteristics and can be used in power transmissions and brakes.Type: GrantFiled: May 27, 1988Date of Patent: August 29, 1989Assignee: Toho Rayon Co., Ltd.Inventors: Hiroyasu Ogawa, Kenji Shimazaki, Kenji Niijima
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Patent number: 4855336Abstract: In a friction material wherein sponge iron is a principle friction producing component especially on initial engagement during a brake application, the improvement wherein 10-50% of the sponge iron is replaced with mill scale without a substantial change in the operational characteristics of the friction material.Type: GrantFiled: July 25, 1988Date of Patent: August 8, 1989Assignee: Allied-Signal Inc.Inventor: Charles E. Newell
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Patent number: 4785029Abstract: A molded resin friction material composition for automobiles or the like. This composition contains as base fibers chopped glass fibers and pulped polyamide fibers in a given compounding ratio. This composition enables to produce brake lining having a high friction coefficient, a low wear ratio, and an improved fade. The fade can be further improved by adding cryolite powder and zirconium oxide powder to the composition.Type: GrantFiled: March 9, 1987Date of Patent: November 15, 1988Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toru Honma, Kenji Kakihara, Makoto Ozawa
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Patent number: 4777193Abstract: A molded resin composition of frictional material for use in clutches of automobiles or the like, comprising inorganic fiber, a resin binder, an inorganic filler and an organic filler, wherein the inorganic filler contains zirconium silicate in an amount from 0.1 to 5.0% by volume based on 100% by volume of the total composition. This composition of frictional material enables the production of clutches having excellent balanced properties between the improvement of .mu. (friction coefficient) and anti-wearing properties.Type: GrantFiled: August 20, 1987Date of Patent: October 11, 1988Assignee: Toyota Jidosha Kabushiki KaishaInventor: Harunobu Kani
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Patent number: 4775705Abstract: Non-asbestos brake pads made of reinforcing, temperature resistant, web-forming fibers such as aromatic polyamide pulp, optionally including other fibers and friction and wear modifiers is described. The brake pads have an actual density not greater than 88% and not less than a 60% theoretical density. The pads are made by the slurry process in which the pad-forming constituents are fed as a slurry into a mold, dewattered and compressed, dried to a preform then heated and pressed to consolidate the preform to substantially the finished density without completely curing the binder. The consolidated pad is then baked to fully cure the binder.Type: GrantFiled: December 19, 1986Date of Patent: October 4, 1988Assignee: T&N plcInventors: Euan Parker, Bruno Grele
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Patent number: 4735975Abstract: A friction material comprising 40 to 95% by volume of a granular material and a thermoset binder resin for binding said granular material, said granular material having been produced by binding at least one powder material with a binder resin so that at least 50% by weight of the granules has a particle size between 140 mesh on and 7 mesh pass, which has good fade resistance and wear resistance.Type: GrantFiled: July 9, 1986Date of Patent: April 5, 1988Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kouichi Iwata, Hiroshi Asano
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Patent number: 4722949Abstract: A non-asbestos friction composition capable of manufacturing in dry process is disclosed characterized in that, to a composition used 1 to 10 vol. % of aramid fiber pulp and 10 to 40 vol. % of inorganic fibers and added with binder resin and friction modifier, 1 to 6 vol. % of cork powder is added as a processing aid.Type: GrantFiled: October 31, 1986Date of Patent: February 2, 1988Assignees: Akebono Brake Industry, Co., Ltd., Akebono Research and Development Centre Ltd.Inventors: Kazuya Horiguchi, Kazushige Kiba
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Patent number: 4722950Abstract: A composition of material for use as a friction material for a brake lining wherein steel fiber is the only metallic ingredient and the holding matrix is formed by rubber particles and phenolic resin. The holding matrix being strengthened by a reaction of the resin with calcium hydroxide. When the steel fiber comprises from 25-48% by weight of the total mixture and the rubber particles and phenolic resin comprise 17-25% by weigh of the total mixture, a sufficient structural unity is produced for the resulting friction material to withstand dynamic loading experienced during a brake application.Type: GrantFiled: July 7, 1986Date of Patent: February 2, 1988Assignee: Allied CorporationInventor: Michael E. Miller
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Patent number: 4705817Abstract: A method of preventing the rust-forming and adherence between friction material and opposite friction member by incorporating into the friction material a mixture or reaction product of boric acid and zinc oxide as an additive in an amount of 0.5 to 20 wt. %.Type: GrantFiled: October 21, 1986Date of Patent: November 10, 1987Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.Inventors: Kazuo Tsugawa, Susuma Wada
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Patent number: 4672082Abstract: A friction material particularly useful for vehicle brakes comprises a friction material body including a plurality of steel fibers. Each steel fiber includes at least 0.07% by weight of sulphur, at least 0.10% by weight of phosphorus, or at least 0.15% by weight of both sulphur and phosphorus. The friction material exhibits high friction coefficients and less abrasion with respect to materials against which it bears as compared to conventional wear materials utilizing steel fibers.Type: GrantFiled: November 7, 1985Date of Patent: June 9, 1987Assignee: Sumitomo Electric Industries, Ltd.Inventors: Mitsuhiko Nakagawa, Fumiaki Nitto
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Patent number: 4665108Abstract: A friction material having particular use in brake pads for motor vehicles. The material includes iron powder as its chief constituent. In addition, the material contains phosphorous (P) of 0.02% or more of sulfur (S) of 0.02% or more or combined P and S of 0.03% or more.Type: GrantFiled: November 8, 1985Date of Patent: May 12, 1987Assignee: Sumitomo Electric Industries, Ltd.Inventors: Mitsuhiko Nakagawa, Fumiaki Nitto
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Patent number: 4657951Abstract: The invention provides a friction member having high heat resistance and wearing resistance useful as a brake shoe or brake block in traffic vehicles and industrial machines. The friction member is prepared by consolidating a fibrous base material, e.g. asbestos, with a resinous binder which is a phenolic resin modified with an organopolysiloxane which characteristically comprises, in a molecule, at least one tetrafunctional siloxane unit of the formula SiO.sub.2 and/or at least one trifunctional siloxane unit of the formula R.sup.1 SiO.sub.1.5, in which R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms.Type: GrantFiled: February 10, 1986Date of Patent: April 14, 1987Assignees: Shin-Etsu Chemical Co, Ltd., Gun-ei Chemical Industry Co., Ltd.Inventors: Mitsuhiro Takarada, Hiroshi Ishii, Yutaka Arai, Takashi Hamano
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Patent number: 4654272Abstract: Frictional sounds caused by molded articles, particularly molded parts for automobiles, of non-olefinic synthetic resins rubbing against one another are decreased by incorporating an amide stearate or derivative thereof in the molded article or by coating the surface of the molded article with the stearate.Type: GrantFiled: December 27, 1984Date of Patent: March 31, 1987Assignees: Honda Giken Kogyo Kabushiki Kaisha, Tokyo Seat Kabushiki KaishaInventors: Masamichi Masuda, Shinichi Sawai, Naoto Ishii
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Patent number: 4617162Abstract: Method for the production of friction linings, in which a mixture of fibers and wetting agents with water, in a fiber:water-mixture ratio from about 1:3 to 1:7, in the presence of plastifying components, is homogenized, the so formed plastic mass is shaped into a formed body, the formed body is dried, and then strengthened and hardened under heat and pressure. According to a variation, additives are first intensively mixed in after homogenization of the mixture containing fibers, wetting agent, plastifying component and water. The plastifying component may be a pectin, a polysaccharide, a vegetable glue or a viscose solution, in particular algin or gum arabic. Moreover, the plastifying component may be a colloid, in particular an aqueous colloid. It may also be a fiber colloid. In that case, it is preferred for the fiber colloid content to be greater than about 30% by weight.Type: GrantFiled: December 7, 1981Date of Patent: October 14, 1986Assignee: Rex Patent Graf von Rex GmbH & Co KGInventors: Wolff G. von Rex, Hans Fetzer
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Patent number: 4617165Abstract: A composition of material for use as a friction material in a brake and its method of manufacture. Liquid double salts of dibasic and monobasic (ammonium-potassium hydrogen) phosphoric acid (DSP) is added to a dry mixture of reinforcing fiber, friction modifiers, fillers and phenolic resin to create a high viscosity slurry. Thereafter, a metallic (magnesium) oxide and para formaldehyde (para) are added to the slurry. Molds which have been previously heated are filled with the slurry and any excess removed. The metallic oxide reacts with the DSP and the para reacts with the phenolic resin to create a two binder matrix for holding the reinforcing fiber, friction material and fillers in a fixed relationship corresponding to the shape of a brake pad. The brake pads are removed from the molds and transported to a ventilated chamber where the internal curing proceeds at or near ambient temperature to complete the manufacture of the brake pad.Type: GrantFiled: May 13, 1985Date of Patent: October 14, 1986Inventors: Peter H. S. Tsang, Joseph P. Coyle, Seong K. Rhee
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Patent number: 4530881Abstract: A wet friction material composition for use in clutches, brakes and the like is composed of a resilient binder comprising a fluoroelastomer. The friction material is characterized by containing a significant amount of wollastonite as a filler, which unexpectedly alters the ratio between the dynamic and static coefficients of friction exhibited by the friction material during actual use.Type: GrantFiled: February 24, 1983Date of Patent: July 23, 1985Assignee: Raymark Industries, Inc.Inventors: Muljadi Santoso, John N. Anderson
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Patent number: 4508855Abstract: A friction material suitable for use as a bearing, comprising:(a) 20-40 weight percent phenolic resin;(b) 5-15 weight percent graphite;(c) 0.5-3.5 weight percent carbon black;(d) 40-60 weight percent of a non-asbestos containing refractory fiber comprising at least 25 wt. % CaO and 35 wt. % SiO.sub.2 ; and(e) 4-10 weight percent acrylic fiber.Type: GrantFiled: July 6, 1984Date of Patent: April 2, 1985Assignee: Manville Service CorporationInventor: Walter B. Peters
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Patent number: 4476256Abstract: A friction material for brake linings is formed using a polystilbazole resin (3-16% by weight) to provide the matrix for the material. The balance of the material is filler material such as steel wool, metal powders, carbon, ceramic powders, and friction modifiers. The lining is produced by mixing the ingredients and hot pressing the mixture at temperatures which promote the flow and cure of the resin, and at pressures which produce a material of suitable density.Type: GrantFiled: January 23, 1984Date of Patent: October 9, 1984Assignee: Rockwell International CorporationInventor: Charles L. Hamermesh
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Patent number: 4474905Abstract: Chemically reactive liquids such as catalyzed monomers and prepolymers are mixed with finely divided solids to form a homogeneous blend by chilling the liquid to a temperature below its solidification point, forming it into finely divided solidly frozen particulates, chilling the finely divided solids to a temperature below the solidification temperature of the reactive liquid and mixing the materials together without allowing the temperature to rise to the liquid solidification point. The admixture may then be formed into a permanent shape by warming to a temperature whereat the frozen liquid melts and the liquid is caused to react.Type: GrantFiled: February 24, 1983Date of Patent: October 2, 1984Assignee: General Technology Applications, Inc.Inventors: Albert F. Hadermann, Paul F. Waters, Jerry C. Trippe
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Patent number: 4465796Abstract: A friction lining suitable for brakes, clutches etc. comprises mineral fibres which contain alumina, Al.sub.2 O.sub.3, silica, SiO.sub.2, and lime, CaO. The mineral fibres have a percentage by weight of alumina, Al.sub.2 O.sub.3, of between 18% and 25%, a percentage by weight of silica, SiO.sub.2, of between 38% and 45% and a percentage by weight of lime, CaO, of between 23% and 33% and preferably of the order of 27%. Moreover, the mineral fibres contain iron oxide, Fe.sub.2 O.sub.3, in a proportion by weight of between 0.5% and 1%, alkali metal oxides, Na.sub.2 O and K.sub.2 O, in a proportion by weight of between 4% and 10% and magnesia, MgO, in a proportion by weight of between 0.5% and 3%.Type: GrantFiled: February 1, 1983Date of Patent: August 14, 1984Assignee: ValeoInventors: Pierre Leroy, Michel Pilache
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Patent number: 4461643Abstract: A friction material for use as a brake lining in automobiles, trucks, buses or similar vehicles. The brake lining contains no more than traces of asbestos and utilizes the mineral vermiculite as a basic constituent. The formulation of the brake lining comprises a non-fibrous natural or synthetic mineral or mineral-like material which on being compressed at ambient temperatures and at pressures of 1700 to 2600 p.s.i. has significant green strength in the order of 2 to 25 p.s.i. and also has appropriate thermal resistance, frictional properties, and shear and flexural strengths, together with a thermosetting resin as the basic components together with other organic and inorganic materials as friction modifiers and fillers. The mineral preferably comprises vermiculite, and together with the resin comprises preferably about 35% to 100% by weight of the brake lining formulation. The ratio by weight of resin to vermiculite is preferably in a range having a upper limit not exceeding about 1.2/l to 1.Type: GrantFiled: September 30, 1982Date of Patent: July 24, 1984Assignee: Glennco TrustInventor: Edward R. Kaufman
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Patent number: 4438004Abstract: A friction material member particularly useful in high load and temperature applications and a method for making the same are disclosed. The friction material member is made by preparing a mixture of sinterable metal particles, carbonaceous material, friction enhancers and curable polymeric resin; the mixture comprising at least about 50 percent by weight of metal particles and sufficient resin to coat and bond the metal particles, carbonaceous material and friction enhancers. The mixture is molded and the resin cured to form a piece in a solid preformed shape corresponding to the shape of the mold. Thereafter, the preformed piece is heated in a substantially oxygen free atmosphere for a time and at temperatures and pressures sufficient to fuse at least a portion of the metal particles into a sintered metal matrix. The preformed piece may be sintered to a metal backing plate during the heating step, or may be welded, brazed or soldered to the plate after heating.Type: GrantFiled: December 6, 1982Date of Patent: March 20, 1984Assignee: Raymark Industries, Inc.Inventor: Paul A. Myers
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Patent number: 4403047Abstract: An asbestos-free friction material containing "soft" glass fibers. The friction material, in a clutch or brake apparatus, is characterized by unusually smooth, quiet, vibrationless operation.Type: GrantFiled: August 29, 1980Date of Patent: September 6, 1983Assignee: Borg-Warner CorporationInventor: Clarence C. Albertson
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Patent number: 4388423Abstract: A friction material for use as a brake lining in automobiles, trucks, buses or similar vehicles. The brake lining contains no more than traces of asbestos and utilizes the mineral vermiculite as a basic constituent. The formulation of the brake lining comprises a non-fibrous natural or synthetic mineral or mineral-like material together with a small quantity of non-asbestos fibers and acicular mineral particles which on being compressed at ambient temperatures and at pressures of 1700 to 2600 p.s.i. has significant green strength in the order of 2 to 25 p.s.i. and also has appropriate thermal resistance, frictional properties, and shear and flexural strengths, together with a thermosetting resin as the basic components together with other organic and inorganic materials as friction modifiers and fillers. The mineral preferably comprises vermiculite, and together with the resin comprises preferably about 35% to 95% by weight of the brake lining formulation.Type: GrantFiled: July 29, 1982Date of Patent: June 14, 1983Assignee: Glennco TrustInventors: Edward R. Kaufman, Gregory R. Benson, Alfred Shaines
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Patent number: 4384053Abstract: Product usable for manufacturing industrial articles such as friction linings for clutches and brakes. This product comprises a fine fibrous steel powder having a loose density of 0.2 to 1.5 g/c.c. with a carbon content of 0.95 to 1.10% by weight, the chromium content by weight ranging from 1.30% to 1.60%. The powder has a micrographic structure which, when observed in a plane intersecting a metal particle, shows a fine distribution of iron and chromium spherular carbides having the formula (Fe, Cr).sub.3 C in a mixed high-strength martensite and deformable austenite matrix.Type: GrantFiled: January 16, 1981Date of Patent: May 17, 1983Assignees: Societe Nouvelle de Roulements, Regie Nationale des Usines RenaultInventors: Fernand Peilloud, Gerard Gladel
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Patent number: 4374211Abstract: The addition of aramid polymer pulp fiber to non-asbestos type friction material compositions results in a marked improvement in the flexural strength and structural integrity of preforms used in the manufacture of friction elements. The consequent handling characteristics of the preform lead to significant improvements in ease of manufacturing of the friction element.Type: GrantFiled: September 15, 1981Date of Patent: February 15, 1983Assignee: Thiokol CorporationInventors: John P. Gallagher, Philip H. Dougherty
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Patent number: 4374059Abstract: An improved process for molding fiber-reinforced articles and in particular, those articles which are formed from monofilaments such as metal fibers and processed mineral fibers of the slag type. The fiber-containing molding composition is enclosed in a restraining means, such as a bag, and placed in a mold and formed during which time the bag advantageously deteriorates.Type: GrantFiled: May 11, 1981Date of Patent: February 15, 1983Assignee: Carlisle CorporationInventor: Harry H. Wagner
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Patent number: 4371631Abstract: A sound attenuating composition for use as a molded-in backer stock between a brake backer plate and the wear stock of a brake shoe comprising approximately in percent by volume:non-fibrous organic components=15-40%fiber reinforcement=20-50%inorganic components=15-50%phenolic resin=5-10%.Type: GrantFiled: August 3, 1981Date of Patent: February 1, 1983Assignee: Manville Service CorporationInventor: Walter B. Peters
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Patent number: 4369263Abstract: A friction material useful in automobile brakes and the like, comprises as a reinforcing agent steel wool coated with a thermosetting resin such as a phenolic resole resin.Type: GrantFiled: December 15, 1980Date of Patent: January 18, 1983Assignee: Sumitomo Durez Company Ltd.Inventors: Noriaki Matsushima, Ken-ichi Noguchi, Kazuhisa Hirano