With Lubrication Patents (Class 476/8)
  • Patent number: 10145276
    Abstract: An exemplary method of monitoring a position of a lubricant valve in a gas turbine engine includes monitoring a position of a lubricant valve using a first auxiliary pressure reading and a second auxiliary pressure reading. The first auxiliary pressure reading is taken when a primary lubrication circuit is at a first pressure. The second auxiliary pressure reading is taken when the primary lubrication circuit is at a second pressure. An exemplary assembly that detects transitions of a lubricant valve in a gas turbine engine includes a controller that uses readings of the primary pressure and readings of the auxiliary pressure to detect a position of a lubricant valve.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 4, 2018
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventor: Francis Parnin
  • Patent number: 8911320
    Abstract: In a disc grinder, a spindle mounted with a grindstone intersects an output shaft of an electric motor. The disc grinder includes the three-point pressing continuously-variable transmission between the output shaft of the electric motor and a bevel gear train. The bevel gear train is used for deceleration. The traction grease having a high traction coefficient is used as the lubricant of the traction drive. A grease reservoir or felt members arranged in sliding contact with the pressing parts are disposed in the transmission case.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: December 16, 2014
    Assignee: Makita Corporation
    Inventors: Manabu Tokunaga, Akihiro Ito, Shinji Hirabayashi
  • Publication number: 20140141932
    Abstract: A high durability roller, a manufacturing method thereof and a power transmission device with the high durability roller are provided. The roller for a power transmission device that comprises a plurality of rollers in contact with each other directly or with lubricant between them, includes: a metal base having a Young's modulus of 220 GPa or less; and a coating that is formed on a surface of the metal base, includes hard particles and a metal component composed of at least either simple metal or alloy, and has a Young's modulus of 250 GPa or more. The power transmission device includes the roller. The method of manufacturing the roller includes: forming the coating on the surface of the metal base by thermal spraying using a thermal spray material that comprises the hard particles and the metal component composed of at least either simple metal or alloy.
    Type: Application
    Filed: July 4, 2012
    Publication date: May 22, 2014
    Inventors: Kazuhiko Takashima, Toshikazu Nanbu, Kazunori Sakata, Kouji Tagomori, Naoki Sugiyama
  • Publication number: 20140045647
    Abstract: A drive force distributing device includes first and second rollers rotatable jointly with a main drive wheel system and a subordinate drive wheel system, respectively. A shaft portion of the second roller is rotatably supported via a bearing in an eccentric bore of a crankshaft that in turn is rotatable about a fixed axis of a housing. Control of the drive force distribution between the main drive wheels and the subordinate drive wheels is carried out by turning the second roller by the rotation of the crankshaft about the fixed axis to adjust the inter-roller pressing force by an adjustment mechanism which performs a reverse rotation control in which the turning direction of the second roller and the rotation direction of the second roller are in the opposite direction when the detected oil temperature exceeds a predetermined temperature. An identical rotation control is performed otherwise.
    Type: Application
    Filed: July 1, 2013
    Publication date: February 13, 2014
    Inventor: Eigo Sakagami
  • Publication number: 20140038770
    Abstract: An electric power generating device (1) capable of suppressing an increase of a frontal surface area of an aircraft engine includes a transmission (22) connected with a rotary shaft (9) of the engine (E), an electric power generator (34) driven by an output of the transmission (22), an input shaft (27) having a shaft axis extending in a direction crossing the rotary shaft (9) and connected with the rotary shaft (9), and a transmitting mechanism (21) connected with the input shaft (27) to drive the transmission (22) about an axis extending in a direction perpendicular to the input shaft (27). The transmission (22) and the electric power generator (34) are disposed spaced a distance from each other in a direction circumferentially of the rotary shaft (9).
    Type: Application
    Filed: April 4, 2012
    Publication date: February 6, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Tatsuhiko Goi, Kenichiro Tanaka, Koji Watanabe, Isao Fujii
  • Patent number: 8608609
    Abstract: Disclosed is a symmetrical traction drive that utilizes multi-diameter rollers having traction surfaces for transferring rotational mechanical energy between the shaft and a transfer gear. Multi-diameter rollers are mounted in carriers disposed between two substantially symmetrical ring gears. Sloped traction surfaces of the ring gears mate with inner traction surfaces on both sides of the multi-diameter rollers. Since force is applied to the inner traction surfaces on both sides of the multi-diameter rollers, forces are substantially equalized on each side of the multi-diameter rollers. An outer traction surface of the multi-diameter roller interfaces with a traction surface on the shaft. Speed reduction ratios of at least 20:1 or greater can be achieved.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: December 17, 2013
    Assignee: VanDyne SuperTurbo, Inc.
    Inventors: Ryan Sherrill, Sterling Holman, Ed VanDyne, Wayne Penfold
  • Publication number: 20130288848
    Abstract: Components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT) having a variator provided with a plurality of tilting, traction planets and traction rings are described. In one embodiment, a variator is coupled to a rangebox to provide multiple operating modes. In another embodiment, a hydraulic system is configured to control the transmission ratio of the variator and the rangebox. Shift-cam-and-sun subassemblies can be used to facilitate shifting of the transmission ratio of a CVT. A transmission housing and bell housing can be adapted to house components of a CVT and, in some embodiments, to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Related devices include, for example, a pivot arm, a control feedback mechanism, axial force generation and management mechanisms, a control valve integral with an input shaft, a pivot pin hub, and a rotatable carrier configured to support planet-pivot arm assemblies.
    Type: Application
    Filed: June 27, 2013
    Publication date: October 31, 2013
    Inventors: Jeremy Carter, Charles B. Lohr, Brad P. Pohl, David Kieke
  • Patent number: 8366575
    Abstract: A power transmission device that includes an uppermost side bearing; a lower side bearing; an uppermost side lubricating medium storage portion defined between the uppermost side bearing and the case to guide a lubricating medium to the uppermost side bearing; a lower side lubricating medium storage portion defined between the lower side bearing and the case to guide a lubricating medium to the lower side bearing, and located below the uppermost side lubricating medium storage portion when installing the power transmission device for a vehicle on the vehicle; and a communicating passage formed in the case to communicate the uppermost side lubricating medium storage portion and the lower side lubricating medium storage portion with each other.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: February 5, 2013
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Michihiro Ariga, Yasuhiro Oku, Syoichi Sayo
  • Publication number: 20120165152
    Abstract: In a disc grinder, a spindle mounted with a grindstone intersects an output shaft of an electric motor. The disc grinder includes the three-point pressing continuously-variable transmission between the output shaft of the electric motor and a bevel gear train. The bevel gear train is used for deceleration. The traction grease having a high traction coefficient is used as the lubricant of the traction drive. A grease reservoir or felt members arranged in sliding contact with the pressing parts are disposed in the transmission case.
    Type: Application
    Filed: August 19, 2010
    Publication date: June 28, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Manabu Tokunaga, Akihiro Ito, Shinji Hirabayashi
  • Publication number: 20110070990
    Abstract: A drive system with a case divided into two oil-tight compartments. The first compartment is filled with traction oil and accommodates a friction type continuously variable transmission (CVT) device, and a second compartment filled with lubricant oil and a gear transmission device formed from a meshing rotary transmission mechanism. The CVT device includes an input member, an output member, and a ring interposed in such a way that the ring moves in an axial direction to steplessly change speeds. An input or output member of the CVT device includes a first axial portion rotatably supported by the case, and a second axial portion supported on a second side of the partition through a bearing that provides support in a thrust and radial direction. The bearing is mounted to the partition so that an inner race of the bearing is unrotatably connected to the second-side axial portion through a rotation stopper.
    Type: Application
    Filed: August 5, 2010
    Publication date: March 24, 2011
    Applicant: AISIN AW CO., LTD.
    Inventors: Mitsugi YAMASHITA, Shoji Takahashi, Misaki Kamiya, Masayuki Uchida
  • Patent number: 7762920
    Abstract: A continuously variable transmission (CVT) having a main shaft configured to support and position various components of the CVT. Shift cam discs cooperate with ball-leg assemblies to shift the transmission ration of the CVT. Load cam discs, a torsion disc, rolling elements, and a hub cap shell are configured to generate axial force, transmit torque, and manage reaction forces. In one embodiment, a splined input shaft and a torsion disc having a splined bore cooperate to input torque into the variator of the CVT. Among other things, various ball axles, axle-ball combinations, and reaction force grounding configurations are disclosed. In one embodiment, a CVT having axial force generation means at both the input and output elements is disclosed.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: July 27, 2010
    Assignee: Fallbrook Technologies Inc.
    Inventors: Robert A Smithson, Brad P Pohl, Oronde J Armstrong, Donald C Miller, Daniel J Dawe, Fernand A Thomassy, Matthew P Simister, Wesley R Poth, Jon M Nichols, Charles B Lohr
  • Patent number: 7762919
    Abstract: A continuously variable transmission (CVT) having a main shaft configured to support and position various components of the CVT. Shift cam discs cooperate with ball-leg assemblies to shift the transmission ration of the CVT. Load cam discs, a torsion disc, rolling elements, and a hub cap shell are configured to generate axial force, transmit torque, and manage reaction forces. In one embodiment, a splined input shaft and a torsion disc having a splined bore cooperate to input torque into the variator of the CVT. Among other things, various ball axles, axle-ball combinations, and reaction force grounding configurations are disclosed. In one embodiment, a CVT having axial force generation means at both the input and output elements is disclosed.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: July 27, 2010
    Assignee: Fallbrook Technologies Inc.
    Inventors: Robert A. Smithson, Brad P. Pohl, Oronde J. Armstrong, Donald C. Miller, Daniel J. Dawe, Fernand A. Thomassy, Matthew P. Simister, Wesley R. Poth, Jon M. Nichols, Charles B. Lohr
  • Publication number: 20100093479
    Abstract: Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable transmissions (CVT) having a variator provided with a plurality of tilting, traction planets and traction rings. In one embodiment, a variator is coupled to a rangebox to provide multiple operating modes. In another embodiment, a hydraulic system is configured to control the transmission ratio of the variator and the rangebox. Various inventive shift-cam-and-sun subassemblies can be used to facilitate shifting of the transmission ratio of a CVT. Embodiments of a transmission housing and bell housing are adapted to house components of a CVT and, in some embodiments, to cooperate with other components of the CVT to support operation and/or functionality of the CVT.
    Type: Application
    Filed: February 7, 2008
    Publication date: April 15, 2010
    Applicant: FALLBROOK TECHNOLOGIES INC.
    Inventors: Jeremy Carter, Charles Lohr, Brad Pohl, David Kieke
  • Publication number: 20090286646
    Abstract: In a toroidal continuously variable transmission unit, a pair of guide surface portions 120, 120 are provided on a trunnion 15 so as to face oppositely each other and to extend in a direction which intersects a rotational center axis of a power roller 11 at right angles and intersects pivot shafts 14 at right angles. When a tangential force along a direction of the pivot shafts 14 is applied to the power roller 11, an outer circumferential surface 110 of an outer ring 28 can be brought into abutment with these guide surface portions 120, 120. By this, the toroidal continuously variable transmission unit with good machinability can be obtained in which the power roller together with the outer ring can be rolling guided smoothly relative to the trunnion by an inexpensive and simple construction while avoiding the offsetting of a shaft portion which supports the power roller.
    Type: Application
    Filed: June 28, 2007
    Publication date: November 19, 2009
    Applicant: NSK Ltd.
    Inventor: Yuji Shimomura
  • Publication number: 20090247352
    Abstract: A partition plate is provided in a case to separate a first space where a CVT is disposed and a second space where a forward/backward travel switching mechanism and a differential gear are disposed. Bearings respectively supporting an input cone and an output cone and formed as pure rolling cylindrical roller bearings are disposed in the first space. A bearing supporting one end of an input shaft and formed as a conical roller bearing capable of receiving thrust force, a bearing supporting an output shaft and formed as a conical roller bearing capable of receiving thrust force, and a bearing supporting one end of the output cone are disposed in the second space. The first space and the second space are sealed by oil seals. The first space is filled with traction oil and the second space is filled with lubricating oil.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Applicant: AISIN AW CO., LTD.
    Inventors: Misaki Kamiya, Shoji Takahashi, Mitsugi Yamashita
  • Patent number: 7563192
    Abstract: A toroidal-type continuously variable transmission has a pair of input and output disks each including a first traction surface, power rollers each including a second traction surface and respectively interposed between the first traction surfaces of the input and output disks, an oil passage for guiding lubricating oil to the traction surfaces of the power rollers, input disk and output disk, and a mesh filter disposed on the exit side of the associated oil passage.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: July 21, 2009
    Assignee: NSK Ltd.
    Inventors: Takashi Imanishi, Kazuya Kimura, Sachiko Sekiguchi
  • Patent number: 7491149
    Abstract: A fluid display arrangement is disclosed for a rolling-traction continuously-variable ratio transmission unit in which drive is transmitted from one race to another by at least one rotating roller whose outer circumference engages the races, the fluid supply arrangement comprising a shroud mounted in proximity to the roller and a fluid supply conduit, and being characterised in that the shroud has an inner surface providing a circumferential portion adjacent the roller's outer circumference and two radially extending portions adjacent respective flanks of the roller, a fluid receiving chamber being thereby defined between the roller and the shroud, and the fluid supply conduit being arranged to deliver fluid into the fluid receiving chamber.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: February 17, 2009
    Assignee: Torotrak (Development) Limited
    Inventors: Christopher John Greenwood, Robert John Bonner Flaxman, Graham Briffett, Ian MacPherson
  • Patent number: 7481298
    Abstract: A lubricating structure for a hydrostatic continuously variable transmission. The structure includes an oil path arranged at an outer circumferential side of a clutch valve, and a lubricant oil ejection hole communicating with the outer circumferential side oil path of the clutch valve and formed in the transmission shaft toward the outer circumference of the transmission shaft. In addition, the structure includes a communicating oil path that is also formed in the transmission shaft for communicating between an oil feeding passage communicating with an lubricant oil feeding source and the outer circumferential oil path of the clutch valve. A single orifice is arranged in the communicating oil path, rather than in the lubricant oil ejection hole. This configuration provides for efficient manufacturing and a high degree of freedom in setting of the lubricant oil ejection hole.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: January 27, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshihiro Yoshida, Toshimasa Mitsubori, Kenji Sakakibara
  • Publication number: 20090017982
    Abstract: A power transmission device 1 includes a power transmitting mechanism 15 having a first casing 3, a speed change mechanism 13 and first oil and an intermittent mechanism 27 having a pair of rotating members 17, 19, an intermittent part 21, an actuator 23, a second casing 25 and second oil. The second casing 25 includes a first casing member 33 having a cylindrical part 29 and one end wall 31 and a second casing member 37 having another end wall 35 connected to the cylindrical part 29 integrally. The second casing 25 further includes a sealing member 39 arranged between the rotating member 19 and the end wall 31, another sealing member 41 arranged between the rotating member 19 and the other end wall 35 and an O ring arranged between the first casing 33 and the second casing 37, respectively. The second oil is enclosed in the second casing 25.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 15, 2009
    Applicant: GKN Driveline Torque Technology KK
    Inventors: Christian Gasch, Isao Hirota, Atsushi Tamura, Shouji Yoshida, Susumu Sasaki
  • Patent number: 7476175
    Abstract: 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: Grant
    Filed: August 23, 2006
    Date of Patent: January 13, 2009
    Assignee: Daimler AG
    Inventors: Wolfgang Elser, Steffen Henzler
  • Patent number: 7438659
    Abstract: A device for controlling belt lubrication and cooling of a CVT (Continuously Variable Transmission) is improved for minimizing fluid consumption and improving cooling efficiency by changing the nozzle spraying direction for belt lubrication and cooling. The device for controlling belt lubrication and cooling of the CVT (Continuously Variable Transmission) comprises a fluid control portion operated by flowing of a fluid pressure supplied to a primary pulley and a secondary pulley, and a fluid supply portion for controlling a predetermined fluid supply according to movement of the fluid control portion and being connected to the same.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: October 21, 2008
    Assignee: Hyundai Motor Company
    Inventors: Yeon Ho Kim, Hyun Suk Kim, Doo Hwan Seok
  • Publication number: 20080182709
    Abstract: A hydraulic control circuit for a transmission is provided including a source of pressurized fluid and at least one selectively engageable torque transmitting mechanism. At least one latching valve is provided in communication with the source and is operable to selectively communicate the pressurized fluid to effect engagement of the at least one torque transmitting mechanism. The at least one latching valve is operable to maintain engagement the at least one torque transmitting mechanism irrespective of the presence of the pressurized fluid. A valve is in fluid communication with the source. A lubrication circuit is provided and is operable to lubricate the transmission. The valve is operable to variably communicate the pressurized fluid to the lubrication circuit. A transmission incorporating the hydraulic control circuit is also disclosed.
    Type: Application
    Filed: January 29, 2007
    Publication date: July 31, 2008
    Applicant: GM Global Technology Operations, Inc.
    Inventors: James M. Hart, Clinton E. Carey, Paul D. Stevenson
  • Patent number: 7384368
    Abstract: A toroidal-type continuously variable transmission includes an input shaft, an input disk and an output disk, plural power rollers, a power roller bearing, an oil passage, and a mesh filter. The input and output disks are supported mutually concentrically with the input shaft and mutually independently rotatably. The plural power rollers are sandwiched between the input disk and the output disks. The power roller bearing rotatably supports the power rollers. The oil passage for leading lubricating oil to the power roller bearing. The mesh filter is provided in the oil passage. Accordingly, the toroidal-type continuously variable transmission can prevent an occurrence of biting-in of foreign substances at a power roller bearing, to thereby increase the life of the power roller bearing.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: June 10, 2008
    Assignee: NSK Ltd.
    Inventors: Kouji Ishikawa, Hiroshi Kato, Eiji Inoue, Hiroki Nishii
  • Patent number: 7211024
    Abstract: A toroidal continuously variable transmission in which a rolling member is arranged between a pair of rotary members with contacting its outer circumferential face with a rolling face of those rotary members being opposed to each other through an oil film, and in which a holding member for holding the rolling member in a rotatable condition is provided includes a lubricating oil feeding hole for spraying lubricating oil to a plurality of portions at the center side of the rotation of at least one of the end faces of the rolling member in an axial direction, which is arranged on the holding member.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: May 1, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Patent number: 7094175
    Abstract: A lubrication device for a toroidal type continuously variable transmission, which can set the speed change ratio continuously by transmitting a torque inputted from a power source by rolling members contacting each other through an oil film, and by varying the position of the contact portion of those rolling members steplessly, characterized by comprising: an auxiliary hydraulic power unit for generating an oil pressure without relying on said power source, a preliminary operation detector for detecting whether or not the preliminary operation relative to the start up of said power source is executed, and a preliminary lubricating mechanism for feeding the lubricating oil to the contact portion between said rolling members by means of said auxiliary hydraulic power unit before starting up said power source, when the preliminary operation is detected.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 22, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Patent number: 7033302
    Abstract: In the inner and outer surfaces of the retainer 34b, there are formed recessed grooves 40a, 40a which serve as lubricating oil flow passages for allowing lubricating oil to flow into pockets. Where the axial-direction depth of the recessed groove 40a, 40a is expressed as H and the circumferential-direction width thereof is expressed as 2L, 0.20?H/L?0.97 can be satisfied. Accordingly, it is possible to provide a toroidal-type continuously variable transmission which can prevent the damage of a retainer 34b incorporated into a thrust rolling bearing for supporting a power roller and also can enhance the lubricating efficiency of the present thrust rolling bearing.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: April 25, 2006
    Assignee: NSK Ltd.
    Inventors: Takashi Nogi, Norihisa Kobayashi
  • Patent number: 7029418
    Abstract: A toroidai type continuously variable transmission wherein a rolling member is clamped between rotary members; and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against the center axis of the rotation of said rotary member, characterized by: an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and the oil passage for feeding the lubricating oil to the oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: April 18, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Patent number: 7001305
    Abstract: 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: Grant
    Filed: January 12, 2004
    Date of Patent: February 21, 2006
    Assignee: NSK Ltd.
    Inventors: Masato Yoshida, Kouji Ishikawa, Takashi Imanishi
  • Patent number: 6979277
    Abstract: A toroidal-type continuously variable transmission, includes: a trunnion including: a support plate portion; and a pair of bent wall portions formed in longitudinal-direction two end portions of the support plate portion and bent on an inner surface side of the support plate portion, the pivot shafts being disposed concentrically with each other on outer surfaces of the bent wall portions; a trunnion shaft formed integrally with the pivot shaft; an oil pressure piston fitted with an outer peripheral surface of the trunnion shaft for moving the trunnions along the axial direction of the pivot shaft; and, a cut-away portion formed in the outer peripheral surface of the trunnion shaft for forming, between the cut-away portion and the oil pressure piston, an oil passage for a lubricating oil to be supplied to the bearing for a power roller.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: December 27, 2005
    Assignee: NSK Ltd.
    Inventors: Kouji Ishikawa, Takashi Imanishi
  • Patent number: 6951524
    Abstract: A toroidal-type continuously variable transmission, includes: an input shaft; a pair of mutually opposed input and output disks disposed side-by-side in an axial direction of the input shaft; a pressing mechanism pressing said input disk toward said output disk; a hollow shaft disposed around an outer periphery of the input shaft concentrically with the input shaft, and connecting the pair of input disks to each other; an oil hole formed in a no-penetrating portion of the input shaft where the input shaft does not penetrate through the hollow shaft, and opened on an outer peripheral surface of the no-penetrating portion; and, an oil passage formed between an inner peripheral surface of the hollow shaft and an outer peripheral surface of a penetrating portion of the input shaft where the input shaft penetrates through the hollow shaft.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: October 4, 2005
    Assignee: NSK Ltd.
    Inventors: Kouji Ishikawa, Masami Tanaka, Takashi Imanishi
  • Patent number: 6805654
    Abstract: The present toroidal-type continuously variable transmission comprises an oil passage formed in an input shaft so as to extend in the axial direction of the input shaft, a plurality of ball spline grooves formed in the outer peripheral surface of the input shaft so as to be spaced from one another at a given interval in the peripheral direction of the input shaft, a plurality of oil grooves not only for connecting together the ball spline grooves but also for guiding lubricating oil along the outer peripheral surface of the input shaft, and two oil holes 1a formed in the input shaft 1 for allowing the oil grooves and oil passage to communicate with each other.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: October 19, 2004
    Assignee: NSK Ltd.
    Inventor: Hiroki Nishii
  • Patent number: 6746364
    Abstract: A toroidal-type continuously variable transmission includes an oil supply passage formed in a trunnion, for lubricating bearing parts supporting power rollers. The oil supply passage is structured by a groove formed in the inner surface of the trunnion and a plate-shaped cover member for covering the groove.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: June 8, 2004
    Assignee: NSK Ltd.
    Inventor: Takashi Imanishi
  • Patent number: 6729996
    Abstract: 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: Grant
    Filed: April 25, 2002
    Date of Patent: May 4, 2004
    Assignee: General Motors Corporation
    Inventors: Louis Green, Leonid Charles Lev, Dexter Dean Snyder
  • Publication number: 20040067816
    Abstract: A toroidai type continuously variable transmission wherein a rolling member is clamped between rotary members; and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against the center axis of the rotation of said rotary member, characterized by: an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and the oil passage for feeding the lubricating oil to the oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.
    Type: Application
    Filed: June 23, 2003
    Publication date: April 8, 2004
    Inventors: Yasuji Taketsuna, Shigenori Tamaki
  • Publication number: 20040029676
    Abstract: A toroidal type continuously variable transmission; in which a rolling member for mediating the transmission of a torque is clamped between at least a pair of rotary members; and in which a clamping force for clamping the rolling member in the direction not to let the rolling member be released from between the rotary members is applied to the rolling member, comprises: a detector for detecting temperature rise of either, a temperature of a rolling face of the rotary members for clamping the rolling member, or a temperature of the rolling member; and a rolling member controller for reducing the clamping force in case a temperature rise is detected by said detector.
    Type: Application
    Filed: June 12, 2003
    Publication date: February 12, 2004
    Inventors: Yasuji Taketsuna, Shinegori Tamaki
  • Publication number: 20040029674
    Abstract: A lubrication device for a toroidal type continuously variable transmission, which can set the speed change ratio continuously by transmitting a torque inputted from a power source by rolling members contacting each other through an oil film, and by varying the position of the contact portion of those rolling members steplessly, characterized by comprising: an auxiliary hydraulic power unit for generating an oil pressure without relying on said power source, a preliminary operation detector for detecting whether or not the preliminary operation relative to the start up of said power source is executed, and a preliminary lubricating mechanism for feeding the lubricating oil to the contact portion between said rolling members by means of said auxiliary hydraulic power unit before starting up said power source, when the preliminary operation is detected.
    Type: Application
    Filed: June 12, 2003
    Publication date: February 12, 2004
    Inventors: Yasuji Taketsuna, Shinegori Tamaki
  • Patent number: 6656080
    Abstract: Plural cooling passages extending radially are formed from the inner circumference to the outer circumference and within an output disk common to two toroidal transmission units. Lubricating oil which has reached an annular space between the output disk and the main shaft via holes from an oil passage in the main shaft, flows into the cooling passages inside the output disk, and the output disk is thereby cooled from inside.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: December 2, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Jun Watanabe, Haruhito Mori, Eio Sagara
  • Patent number: 6623399
    Abstract: 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: Grant
    Filed: December 28, 2001
    Date of Patent: September 23, 2003
    Assignee: Dow Corning Corporation
    Inventors: 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
  • Patent number: 6524212
    Abstract: A toroidal-type continuously variable transmission (CVT), including rolling elements having traction surfaces cooperating with each other to transmit a power between the rolling elements via a traction oil film formed between the traction surfaces. The traction surfaces have the microstructure that is defined with respect to a thickness of the traction oil film formed when the temperature of the traction portion of the traction surface is high, to thereby exhibit high traction coefficient even in the high-temperature operating condition.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: February 25, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenshi Ushijima, Toshikazu Nanbu, Nobutaka Chiba, Jun Watanabe
  • Patent number: 6524213
    Abstract: Power rollers 18c are comprised by an inner roller 93 making frictional contact between the input and output disks 18a, 20a and an outer roller 94 supporting a contact load input from the input and output disks 18a, 20a to the inner roller 93 through a ball bearing 92. An inner radial hole 93a is provided on the inner roller 93 to support a pivot shaft 15. The inner radial hole 93a opens near the outer roller and is covered by a bottom part 93b on a side opposite to the outer roller. In this manner, compression deformation of the inner roller is suppressed when a load is applied to the inner roller. Thus smooth rotational motion of the power roller is maintained and component durability can be increased.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: February 25, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Haruhito Mori
  • Patent number: 6500088
    Abstract: A lubricating system for a toroidal continuously variable transmission equipped with a trunnion rotatably supporting a power roller gripped between input and output disks so that a gyration angle of the power roller is variable, includes a first lubricating circuit provided for lubrication of a rolling contact surface on which the input and output disks are in friction-contact with the power roller, and a second lubricating circuit provided for lubrication of the trunnion and the power roller. Also provided in the first lubricating circuit is an oil-temperature control device that heats oil of the toroidal continuously variable transmission, so that the oil temperature-controlled by the oil-temperature control device is supplied through the first lubricating circuit into the rolling contact surface.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: December 31, 2002
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Jun Sugihara
  • Patent number: 6494806
    Abstract: A lubricating oil supply system for an infinitely variable transmission wherein the infinitely variable transmission has a transmission shaft provided with a lubricating oil path and is rotatably mounted through the wall section of a casing. The infinitely variable transmission is housed in a transmission case partly defined by the wall section. An input rotary member is provided that is relatively unrotatably connected to the transmission shaft on the outside of the transmission case. An oil pump is provided for supplying lubricating oil to the lubricating oil path. The oil pump is located in the casing. In this infinitely variable transmission, the oil passage from the oil pump to the lubricated portion of the infinitely variable transmission is simplified in structure and the oil passage is substantially reduced in length, thereby enabling a decrease in the length of the transmission shaft. The oil pump which is driven by the transmission shaft is located on the wall section.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: December 17, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Tsukada, Masahiro Kuroki
  • Publication number: 20020187876
    Abstract: A toroidal-type continuously variable transmission includes an oil supply passage formed in a trunnion, for lubricating bearing parts supporting power rollers. The oil supply passage is structured by a groove formed in the inner surface of the trunnion and a plate-shaped cover member for covering the groove.
    Type: Application
    Filed: May 22, 2002
    Publication date: December 12, 2002
    Applicant: NSK LTD.
    Inventor: Takashi Imanishi
  • Publication number: 20020049113
    Abstract: Plural cooling passages 37a extending radially are formed from the inner circumference to the outer circumference and within an output disk 37 common to two toroidal transmission units. Lubricating oil which has reached an annular space between the output disk 37 and the main shaft 27 via holes 27f, 27g from an oil passage 27e in the main shaft 27, flows into the cooling passages 37a inside the output disk 37, and the output disk 37 is thereby cooled from inside.
    Type: Application
    Filed: September 25, 2001
    Publication date: April 25, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Jun Watanabe, Haruhito Mori, Eio Sagara
  • Patent number: 6368245
    Abstract: In a toroidal-type continuously variable transmission, there is provided a thrust rolling bearing interposed between a power roller and a trunnion for supporting a thrust-direction load applied to the power roller. The thrust rolling bearing includes a plurality of rolling elements and a retainer rollably holding the plurality of rolling elements. The retainer defines a circular-ring-shaped main body and a plurality of pockets respectively formed in the main body for rollably holding the plurality of rolling elements. A clearance between the pocket and the rolling element is set in the range of 0.6 to 6.0% of the ball diameter of the rolling element.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: April 9, 2002
    Assignee: NSK Ltd.
    Inventors: Nobuo Goto, Hiroshi Kato, Masayoshi Shimizuya, Takashi Imanishi, Hisashi Machida, Hirotoshi Aramaki, Kinji Yukawa, Yuji Nakano
  • Publication number: 20020037787
    Abstract: A toroidal-type continuously variable transmission includes three trunnions and power rollers in a single cavity. One of the trunnions is shifted by a pair of oil pressure actuators, each of a single-acting type. The remaining two trunnions are respectively shifted by separate oil pressure actuators, each of a double-acting type.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 28, 2002
    Applicant: NSK LTD
    Inventor: Takashi Imanishi
  • Publication number: 20020035004
    Abstract: In the inner and outer surfaces of the retainer 34b, there are formed recessed grooves 40a, 40a which serve as lubricating oil flow passages for allowing lubricating oil to flow into pockets. Where the axial-direction depth of the recessed groove 40a, 40a is expressed as H and the circumferential-direction width thereof is expressed as 2L, 0.29≦H/L≦0.88 can be satisfied. Accordingly, it is possible to provide a toroidal-type continuously variable transmission which can prevent the damage of a retainer 34b incorporated into a thrust rolling bearing for supporting a power roller and also can enhance the lubricating efficiency of the present thrust rolling bearing.
    Type: Application
    Filed: September 18, 2001
    Publication date: March 21, 2002
    Applicant: NSK LTD.
    Inventors: Takashi Nogi, Norihisa Kobayashi
  • Publication number: 20020010051
    Abstract: A toroidal-type continuously variable transmission (CVT), including rolling elements having traction surfaces cooperating with each other to transmit a power between the rolling elements via a traction oil film formed between the traction surfaces. The traction surfaces have the microstructure that is defined with respect to a thickness of the traction oil film formed when the temperature of the traction portion of the traction surface is high, to thereby exhibit high traction coefficient even in the high-temperature operating condition.
    Type: Application
    Filed: March 22, 2001
    Publication date: January 24, 2002
    Inventors: Kenshi Ushijima, Toshikazu Nanbu, Nobutaka Chiba, Jun Watanabe
  • Patent number: 6332858
    Abstract: A power roller (18C, 18D, 20C, 20D) of a toroidal continuously variable transmission is supported by a pedestal (94) such that it is free to rotate. A first roller bearing (96A) supporting the pedestal (94) in the trunnion (17) against a horizontal load which makes a right angle with an input shaft (16) of the transmission, and a second roller bearing (96B, 96C) supporting the pedestal (94) in the trunnion (17) against a vertical load which makes a right angle with the input shaft (16) of the transmission, are provided between the trunnion (17) and the pedestal (94). These roller bearings (96A), (96B), (96C) permit the pedestal (94) to easily displace parallel to the input shaft (16).
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: December 25, 2001
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Haruhito Mori, Jun Sugihara, Haruyoshi Kumura, Toshikazu Oshidari, Jun Watanabe
  • Patent number: 6306060
    Abstract: A roller control unit for a CVT includes a cylinder (54) having a piston (70) positioned therein and operably connected to a roller assembly of said CVT thereby to control its position. The unit includes a lubrication supply which comprises a chamber (94) between the cylinder (54) and piston (70) and one or more radially extending passageways (102) through said piston (70). These passageways are in flow communication with the roller and act to direct cooling fluid to said roller. Radial supply of said lubrication facilitates a reduction in flow losses within the supply.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: October 23, 2001
    Assignee: Torotrak (Development) Limited
    Inventors: Brian Joseph Dutson, Andrew Damian De Freitas