With Friction Enhancing Fluid Patents (Class 476/7)
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Patent number: 11110805Abstract: The control device (67) includes a rotational speed calculator (68), a bearing torque estimator (69), a torque difference calculator (70) and a drive source torque calculator (71). The rotational speed calculator (68) calculates rotational speeds of first and second connection members. The bearing torque estimator (69) estimates a bearing torque, from the calculated, two rotational speeds. The torque difference calculator (70) calculates a target torque difference between torques to be generated by respective drive sources, from the estimated bearing torque, a torque difference amplification factor (?), and a difference between drive wheel torque command values for respective left and right drive wheels. The drive source torque calculation module (71) calculates drive source torque command values, which are torques to be generated by the respective, left and right drive sources, using the calculated, target torque difference and the drive wheel torque command values for the respective wheels.Type: GrantFiled: March 6, 2019Date of Patent: September 7, 2021Assignee: NTN CORPORATIONInventor: Junichi Hirata
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Publication number: 20150011355Abstract: The use of powder metal components in a variator is disclosed. Traction fluid of various sorts may be used in the variators, not just high performance synthetics or application specific lubricants.Type: ApplicationFiled: July 3, 2014Publication date: January 8, 2015Inventors: Richard Ruebusch, Adrian Lee
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Publication number: 20120157261Abstract: A stepless gear ratio variator for wind generators wherein the transmission of motion between a driving member and a driven member takes place through friction of the respective convex contact surfaces translating simultaneously along respective incident axes of rotation; these surfaces being constrained, in use, to remain constantly in contact by means of a pair of support brackets mutually connected in an articulated manner by means of a pair of plates, pivoted to the same support brackets according to axes passing through the centre of the contact surfaces of the driven and driving members.Type: ApplicationFiled: August 30, 2010Publication date: June 21, 2012Inventor: Lucia Galassi
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Publication number: 20110152030Abstract: A conical friction ring type CVT device configured with a ring interposed between opposing inclined surfaces of first and second friction wheels so as to surround the first wheel. A portion of the ring is submerged in an oil reservoir, and power is transmitted by contact between the ring and the first and second wheels, such that the ring in moves in the axial direction to steplessly changes speed. When the CVT device is mounted in a vehicle, a rotational direction is set such that, during forward travel of the vehicle, opposing, portions of the first and second wheels move upward from below. An oil strainer is disposed on a side of the second wheel opposite the axis of the first wheel with respect to the axis of the second wheel. Furthermore, a guide member is disposed on at least an upper portion of the second wheel.Type: ApplicationFiled: October 26, 2010Publication date: June 23, 2011Applicant: AISIN AW CO., LTD.Inventors: Mitsugi YAMASHITA, Shoji TAKAHASHI, Hideyuki UMEDA
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Publication number: 20110143881Abstract: A conical friction ring type continuously variable transmission device configured a ring is provided such that it is interposed between opposing inclined surfaces of a first and second conical friction wheels so as to surround the first conical friction wheel. In this configuration, power is transmitted by contact between the ring and the first and second conical friction wheels, which moves the ring in the axial direction to steplessly change speed. A portion of the ring is submerged in an oil reservoir in a lower portion of the space when the ring is moved to any position in the axial direction. An oil guide is disposed on an axial partial region on the small diameter side of the first conical friction wheel, and guides oil raked up from the oil reservoir due to the rotation of the ring toward the first conical friction wheel.Type: ApplicationFiled: October 26, 2010Publication date: June 16, 2011Applicant: AISIN AW CO., LTD.Inventors: Mitsugi YAMASHITA, Shoji TAKAHASHI, Hideyuki UMEDA
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Publication number: 20110111918Abstract: According to the invention, a bevel friction ring gear which transmits torque between the two bevels with both bevels mounted on a chassis by bearings may be provided which has a still greater efficiency, wherein at least one of the bevels has a bearing to both sides and that the first of the bearings is sealed relative to the bevel and the second of the bearings is open with relation to the bevel.Type: ApplicationFiled: June 25, 2009Publication date: May 12, 2011Inventor: Ulrich Rohs
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Patent number: 7645395Abstract: The present invention utilizes simple dimethylsilicone fluids of the proper viscosity/molecular weight added to modify the low temperature properties of polycyclic hydrocarbons. One preferred embodiment of a polycyclic hydrocarbon is a perhydro dimer of alpha-methyl styrene. Addition of the dimethylsilicone fluid to the perhydo dimer of alpha-methyl styrene improves the low temperature performance without degrading the requisite low shear stress shear strength properties. Low viscosity dimethylsilicone lubricating fluids combined with polycyclic hydrocarbons are suitable for use in infinitely variable transmissions providing good low temperature flow properties and high shear strength at high temperature and low contact stress conditions.Type: GrantFiled: August 4, 2006Date of Patent: January 12, 2010Assignee: Ashland Licensing and Intellectual Property, LLCInventor: Thomas R. Forbus
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Patent number: 7553429Abstract: The present invention utilizes simple dimethylsilicone fluids of the proper viscosity/molecular weight distribution to modify the low temperature properties of cycloaliphatic hydrocarbon fluids. Addition of the dimethylsilicone fluid to cycloaliphatic fluids improves their low temperature performance without degrading the requisite elastohydrodynamic shear strength properties. Low viscosity dimethylsilicone lubricating fluids combined with cycloaliphatic hydrocarbon fluids are suitable for use in infinitely variable transmissions and other traction-drive transmission providing good low temperature flow properties and high elastohydrodynamic shear strength.Type: GrantFiled: August 4, 2006Date of Patent: June 30, 2009Assignee: Ashland Licensing And Intellectual Property, LLCInventor: Thomas R. Forbus
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Patent number: 7476175Abstract: In a variator for an infinitely variable toroidal drive including a support trunnion rotatably supporting motion transmitting traction rollers and means for the lubrication and cooling of the components of the variator, in particular of the bearings, throttles are provided in the lubricant lines directly adjacent to the bearings whereby the pressure level for lubricant is raised for an improved control of the flow of the lubricant to the different lubricating points.Type: GrantFiled: August 23, 2006Date of Patent: January 13, 2009Assignee: Daimler AGInventors: Wolfgang Elser, Steffen Henzler
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Patent number: 6729996Abstract: A transmission device that includes a driving member and a driven member in frictional engagement with the driving member. A traction fluid is included at a contact between the driving and driven members. The traction fluid is a field responsive fluid that is capable of changing its rheological properties in response to an external field.Type: GrantFiled: April 25, 2002Date of Patent: May 4, 2004Assignee: General Motors CorporationInventors: Louis Green, Leonid Charles Lev, Dexter Dean Snyder
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Patent number: 6682457Abstract: In a toroidal continuously variable transmission the amount of traction oil provided to contact areas between the power rollers and the input and output discs is increased as a power to be transmitted is increased. Nozzle holes formed in rockable trunnions of the transmission so that the traction oil ejected from the nozzle holes is sprayed to circumferential positions of inner surfaces of input and output discs that are in contact with peripheral surfaces of power rollers. Transmission efficiency is enhanced while maintaining endurance and reliability without supplying excessive traction oil.Type: GrantFiled: October 26, 2000Date of Patent: January 27, 2004Assignee: NSK Ltd.Inventors: Masato Yoshida, Kouji Ishikawa, Takashi Imanishi
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Publication number: 20030203788Abstract: A transmission device that includes a driving member and a driven member in frictional engagement with the driving member. A traction fluid is included at a contact between the driving and driven members. The traction fluid is a field responsive fluid that is capable of changing its rheological properties in response to an external field.Type: ApplicationFiled: April 25, 2002Publication date: October 30, 2003Inventors: Louis Green, Leonid Charles Lev, Dexter Dean Snyder
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Patent number: 6623399Abstract: Siloxane compositions are useful as traction fluids in traction drive systems which are subject to varied operating temperature and pressure conditions. Specific siloxane compositions included contain units of formulae (I) (R3SiO1/2)(RSiO3/2)(SiO4/2), (II) (R3SiO1/2)(RSiO3/2), (III) (R3SiO1/2)(SiO4/2), (IV) (R3SiO1/2)(R2SiO2/2)(RSiO3/2), (V) (R3SiO1/2)(R2SiO2/2), and (VI) (R2SiO2/2)a in varying mole percents, where a is an integer ranging from 3 to 20 and each R is independently selected from alkyl groups comprising 1 to 18 carbon atoms and aryl groups comprising 6 to 18 carbon atoms.Type: GrantFiled: December 28, 2001Date of Patent: September 23, 2003Assignee: Dow Corning CorporationInventors: Kenneth Christopher Fey, Glenn Frederick Viaplana Gordon, Terrence Keith Hilty, Russell Keith King, Tina Marie Leaym, Lori Ann Stark-Kasley, Gary Michael Wieber, Eugene Dale Groenhof
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Publication number: 20030134710Abstract: Siloxane compositions are useful as traction fluids in traction drive systems which are subject to varied operating temperature and pressure conditions.Type: ApplicationFiled: December 28, 2001Publication date: July 17, 2003Inventors: Kenneth Christopher Fey, Glenn Frederick Viaplana Gordon, Terrence Keith Hilty, Russell Keith King, Tina Marie Leaym, Lori Ann Stark-Kasley, Gary Michael Wieber, Eugene Dale Groenhof