Fluid Motor Structure Patents (Class 475/146)
  • Patent number: 10544840
    Abstract: A hydraulic clutch assembly includes a rotating shaft. A first clutch and a second clutch are coupled to the shaft. A first passageway located within the shaft supplies an actuating fluid to the first clutch. A second passageway located within the shaft supplies the actuating fluid to the second clutch. A first bleed passage is fluidly coupled with the first passageway. A second bleed passage is fluidly coupled to the second passageway and the first bleed passage. A first outlet is fluidly coupled to the first bleed passage. A second outlet is fluidly coupled to the second bleed passage. The first outlet and the second outlet merge together to form an outlet passage.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: January 28, 2020
    Assignee: Caterpillar Inc.
    Inventors: Konrad Garrett, Heath Toennies
  • Patent number: 10323693
    Abstract: An axle disconnect system for drive axles that utilizes an engagement spring, an electric motor and a slidable gear. The motor is connected to the slidable gear which moves along threads thereby engaging or disengaging clutch teeth on a first side gear which selectively engages a second side gear. The engagement spring is located between a bearing and the first side gear wherein when engagement is desired, but blocked by misalignment of the teeth, the engagement spring can apply a load to allow for engagement once alignment of the teeth is achieved. The use of a second engagement spring allows for the disengagement of the system when disengagement is typically blocked due to high driveline torques without having to reapply current to the motor.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: June 18, 2019
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Peter A. Beesley, Kenneth E. Cooper
  • Patent number: 10316935
    Abstract: A planetary gear train of an automatic transmission for a vehicle is provided to improve power delivery and fuel efficiency by applying six engaging elements to five planetary gear sets to achieve ten forward speed stages and one reverse speed stage. The planetary gear train includes: an input shaft; an output shaft; first to fifth planetary gear sets each including three rotation elements; three clutches and three brakes as the six engaging elements; and first to ninth shafts. In particular, the third shaft fixedly connects seventh, tenth and thirteenth rotational elements, and the fourth shaft fixedly connects sixth and fifteenth rotational elements. In addition, the fifth shaft fixedly connects third and fourth rotational elements, the sixth shaft fixedly connects fifth and eighth rotational elements, and the seventh shaft fixedly connects ninth and eleventh rotational elements.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: June 11, 2019
    Assignees: Hyundai Motor Company, KIA Motors Corporation
    Inventors: Jin Ho Kim, Dong Hwan Hwang, Jong Sool Park, Jong Soo Kim, Kyeong Hun Lee
  • Patent number: 9222526
    Abstract: A clutch assembly includes first, second and third clutches, a housing including a first projection to which the first clutch selectively produces a connection, a second projection to which the second and third clutches selectively produce connections, clutch-apply circuits each circuit corresponding to one of the clutches, and a balance volume circuit for supplying fluid to each of the clutches, and a shaft rotatably supporting the housing.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: December 29, 2015
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Gregory D. Goleski, Jeffrey E. Maurer, Steven G. Thomas
  • Patent number: 8795119
    Abstract: A valve assembly includes a valve body having an input in selective communication with an output, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The input communicates with the output when the valve piston is in a first position and the input does not communicate with the output when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: August 5, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Paul G. Otanez, Craig S. Ross
  • Patent number: 8771121
    Abstract: An assembly includes a valve body having an inlet in selective communication with an outlet and having an unlatch port, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The inlet communicates with the outlet when the valve piston is in a first position and the inlet does not communicate with the outlet when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body. An unlatching mechanism is in communication with the unlatch port of the valve body.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: July 8, 2014
    Assignee: GM Global Technology Operations, LLC
    Inventors: Paul G. Otanez, Craig S. Ross
  • Patent number: 8613682
    Abstract: A rotating clutch operably disposed between two rotating components includes a hydraulic operator having a piston and, on one side of the piston, an apply chamber or cavity and, on the opposite side of the piston, a balance chamber or cavity. The apply chamber is selectively provided with pressurized hydraulic fluid to engage and release the clutch to couple and de-couple the two rotating components. The balance chamber is provided with a flow of pressurized hydraulic fluid from the transmission lubrication system that flows through the transmission main shaft and flow restricting passages to the balance chamber. An exhaust port downstream of the balance chamber releases excess hydraulic fluid flow. Thus, whether, the clutch is rotating or not, hydraulic pressure is maintained in the balance chamber and proper clutch operation is assured.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: December 24, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Kevin C. Beckner, Michael D. Foster
  • Patent number: 8591366
    Abstract: An automatic transmission damper mechanism provided between a first hydraulic passage (23) to which an oil (L) is supplied and a second hydraulic passage (24) from which the oil (L) is supplied to a friction element (18) has: a container (8) provided between the first and second hydraulic passages (23, 24); a slide member (11) provided in the container (8) such that it can slide therein; and an elastic member (9) provided between an inner face of the container (8) and the slide member (11). The container (8) has a pressure chamber (28) defined by an inner face of the container (8) and the slide member (11) and communicating with a branch hydraulic passage (25) branching from the first hydraulic passage (23), and the slide member (11) has a communication hole (15) through which the first and second hydraulic passages (23, 24) are placed in communication by the elastic member (9) contracting under the pressure of the oil (L) supplied into the pressure chamber (28) through the branch hydraulic passage (25).
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: November 26, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshikazu Nakamura
  • Patent number: 8460144
    Abstract: An arrangement which comprises at least one claw clutch for the shiftable coupling and decoupling of a shaft (1), in an automatic transmission of a planetary design, with at least one component. The shaft can be connected to a component of the planetary gearset (4) and the claw clutch is arranged centrally, substantially inside a sun gear (3) of the planetary gearset (4).
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: June 11, 2013
    Assignee: ZF Friedrichshafen , AG
    Inventor: Peter Ziemer
  • Patent number: 8307970
    Abstract: A clutch assembly for a hybrid vehicle includes a clutch assembly including a first housing comprising a first clutch, a first clutch actuator and a second housing having the first clutch actuator at least partially disposed therein so that said first clutch actuator selectively engages the first clutch.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: November 13, 2012
    Inventors: Douglas Scott Burchett, William S. Reed, Kenneth D. Schoch
  • Patent number: 8083627
    Abstract: An automatic transmission includes first and second clutches, a clutch drum, a piston, a plurality of friction plates, a hydraulic oil chamber, a cancel oil chamber, a return spring, and a cancel plate, wherein a plate member that forms a cylinder portion of the hydraulic oil chamber is provided between the piston and the clutch drum of the first clutch that is located on an inner diameter side, and an oil passage that supplies an oil to the cancel oil chamber of the second clutch that is located on an outer diameter side is formed between the clutch drum and the plate member.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: December 27, 2011
    Assignee: Aisin AW Co., Ltd.
    Inventors: Masashi Kito, Norihiro Tokunaga, Hiroshi Kato
  • Patent number: 7998011
    Abstract: A speed change apparatus includes a first clutch having a first clutch drum, in which an annular clutch plate is spline-fitted to an inner peripheral surface of the first clutch drum, and a clutch piston formed with a spline on an inner peripheral surface of the clutch piston is provided to slide in an axial direction and press the clutch plate; and a second clutch having a second clutch drum, which is disposed in the clutch piston of the first clutch concentrically with the first clutch, and in which a spline is formed on inner and outer peripheral surfaces of the second clutch drum such that outer peripheral surface spline teeth form inner peripheral surface spline grooves. Wherein the outer peripheral surface of the second clutch drum is spline-fitted to the inner peripheral surface of the clutch piston and an annular clutch plate is spline-fitted to the inner peripheral surface of the second clutch drum.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: August 16, 2011
    Assignee: Aisin AW Co., Ltd.
    Inventors: Takuya Ishii, Minoru Todo
  • Patent number: 7896145
    Abstract: An automatic transmission including a first clutch, a second clutch, a first drum in which a first piston of the first clutch is axially slidably received and that cooperates with the first piston to define a first oil chamber, a second drum disposed coaxially with the first drum, so as to accommodate the first drum, and in which a second piston of the second clutch is axially slidably received, the second drum cooperating with the second piston to define a second oil chamber, a first fluid supply portion for feeding a working fluid into the first oil chamber through the first drum and the second drum, to operate the first piston, and a second fluid supply portion for feeding the working fluid into the second oil chamber through the second drum, to operate the second piston, and wherein the second fluid supply portion is located radially outwardly of the first fluid supply portion.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: March 1, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoki Kato, Terufumi Miyazaki
  • Patent number: 7891476
    Abstract: Each of first and second multi-plate clutches comprises a clutch outer cylinder portion provided to be coaxial with the input shaft and connected with a first or second rotational element, a clutch inner cylinder portion provided to be coaxial with an input shaft, plural clutch plates provided between these cylinder portions to slide in an axial direction of the input shaft within the clutch outer or inner cylinder portion, and a clutch piston provided to slide in the axial direction and press the clutch plates for connecting the clutch outer cylinder portion with the clutch inner cylinder portion. The clutch outer and inner cylinder portions of each of the first and second multi-plate clutches are provided in the axial direction, and there is provided a support wall portion that is connected with the input shaft and supports the clutch inner cylinder portion of each of the multi-plate clutches.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: February 22, 2011
    Assignee: Mazda Motor Corporation
    Inventors: Tatsuhiko Iwasaki, Junichi Doi, Tatsutoshi Mizobe, Naohiro Sakaue
  • Patent number: 7862461
    Abstract: An automatic transmission that includes one clutch that includes a clutch drum; a piston that forms a hydraulic oil chamber using a part of the clutch drum as a cylinder; a plurality of friction plates that engage with the clutch drum; and a cancel oil chamber that is provided on a rear side of the piston and that cancels a centrifugal oil pressure that acts on the hydraulic oil chamber. Oil is supplied to the cancel oil chamber from a boss portion formed in the clutch drum on a radially inner side, and the oil is discharged from discharge holes formed in the boss portion to an outside of a hydraulic oil chamber side of the clutch drum.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: January 4, 2011
    Assignee: Aisin AW Co., Ltd.
    Inventors: Masaaki Nishida, Hiroshi Katou, Masashi Kitou, Kohei Iizuka
  • Patent number: 7815534
    Abstract: An arrangement is proposed for a planetary gearset (2) with an axially adjacent shift element in a housing (1) of a transmission of a vehicle, such that the planetary gearset (2) is connected to the shift element for torque transfer, and such that a non-destructively detachable connection is provided between the shift element and the planetary gearset (2).
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 19, 2010
    Assignee: ZF Friedrichshafen AG
    Inventor: Gerhard Höckl
  • Publication number: 20100099533
    Abstract: A power take off device includes input and output shafts and an integral planetary gear set. The power take off device may be a single speed or a two speed device. The input shaft and the output shaft are mechanically connected through the planetary gear set. In one mode of operation of the power take off device, a substantial speed reduction and torque increase is provided between the input shaft and the output shaft. The power take off device may change to a second mode of operation without stopping to provide a direct one to one speed and torque ratio between the input shaft and the output shaft. A planetary gear set clutch unit includes a two direction actuator that provides fluid pressure actuation and release of the clutch unit with a single input signal.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 22, 2010
    Applicant: PARKER HANNIFIN CORPORATION
    Inventors: STEPHEN DANIEL HORSFALL, JOHN LOEFFLER
  • Publication number: 20100075794
    Abstract: A transmission system without dynamic seals, specifically, an actuator for a vehicle transmission including a first rotating clutch pack engageable with a planetary gearset a first non-rotating actuator piston for engaging the clutch pack and a first bearing for isolating a first rotation of the clutch pack from the piston. A transmission system is provided using an electromechanical system for shifting the clutches, allowing a smaller pump only for lubrication of the transmission and the torque converter flow.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Applicant: LUK LAMELLEN UND KUPPLUNGSBAU BETEILIGUNGS KG
    Inventors: Trevor McConnell, Jeffrey Hemphill, Philip George
  • Publication number: 20090253544
    Abstract: A transmission includes two blocking valves that control fluid pressure to a plurality of clutches. The blocking valves are characterized by a plurality of states that result in at least three transmission operating conditions. Each of the three operating conditions is characterized by fluid pressure being unavailable to a respective one of the plurality of clutches.
    Type: Application
    Filed: November 6, 2008
    Publication date: October 8, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Michael D. Foster, Jy-Jen F. Sah, Peter E. Wu
  • Patent number: 7585243
    Abstract: The present invention provides an automatic transmission having a main bearing disposed between the inner surface of a boss portion of a first drum and the outer surface of a cylindrical support, for rotatably supporting the first drum. An auxiliary bearing is press-fit into one end of the interior of the boss portion of the first drum and surrounds the cylindrical support with an annular gap therebetween. The auxiliary bearing contacts the cylindrical support only when the first drum tilts relative to the central axis of the transmission, and has a shorter axial length than that of the main bearing.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 8, 2009
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhisa Ishii, Minoru Todo, Mikio Iwase, Takuya Nakajima, Hirofumi Ota, Kazutoshi Nozaki, Atsushi Honda, Masafumi Kinoshita
  • Patent number: 7559867
    Abstract: A connection structure for an automatic transmission includes a drum member that includes a base portion, an outer diameter portion that extends from an outer diameter side of the base portion in an axial direction, and a collar portion that extends from an inner diameter side of the base portion in the axial direction; a base member that includes a raised portion, an outer diameter portion that extends from an outer diameter side of the raised portion in the axial direction, a boss portion that extends from an inner diameter side of the raised portion in the axial direction, and a connection portion that extends from an end of the outer diameter portion; and a ring gear of a planetary gear that includes a spline groove and a circular concave groove on an end portion of an inner peripheral face.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: July 14, 2009
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuichi Seki, Takuya Ishii, Toshihiko Aoki, Minoru Todo, Kazutoshi Nozaki, Akiharu Abe, Atsushi Honda, Masafumi Kinoshita, Hirofumi Ota
  • Patent number: 7549523
    Abstract: A second clutch piston formed of a plurality of members including a cylindrical cylinder member, a disc-shaped bottom plate member that fits in one end portion of that cylinder member, and a snap ring, has a plurality of long positioning protrusions provided on an inner peripheral surface of the cylinder member. By abutting the disc-shaped bottom plate member against end surfaces of these positioning protrusions, the bottom plate member can be fit into the one end portion of the cylinder member without having to provide notches therein, which enables durability against a pulling force generated in the cylinder member when the friction apply device is applied to be maintained.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: June 23, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shintaro Goto, Naoki Kato
  • Patent number: 7537536
    Abstract: A universal two speed gearbox for driving high speed vehicles under high temperature operating conditions, and other devices which require variable operating two speed bearing thrust.
    Type: Grant
    Filed: August 26, 2006
    Date of Patent: May 26, 2009
    Inventors: Dusan J. Hvolka, Patrick Hvolka
  • Patent number: 7513351
    Abstract: A piston for an automatic transmission including a pair of mutually meshing gears such as counter drive and driven gears mounted on respective two parallel shafts, the piston including a bottom portion, and a cylindrical portion to be disposed radially outwardly of one of the mutually meshing gears, wherein the cylindrical portion has not only a cutout formed in a first circumferential part thereof for permitting mutual meshing engagement of the mutually meshing gears such that a point of the mutual meshing engagement is located within a circumference of the cylindrical portion, but also a through-hole formed in a second circumferential part thereof so that a speed sensor extends through the through-hole, for detecting the rotating speed of the above-indicated one gear disposed radially inwardly of the cylindrical portion. This arrangement of the cylindrical portion permits size reduction of the cutout, and assures sufficiently high degrees of strength and rigidity of the piston.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: April 7, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirofumi Onishi, Yuji Yasuda, Terufumi Miyazaki
  • Patent number: 7458913
    Abstract: A power transmission, for a vehicle, provides seven forward speeds and a reverse speed. The transmission has three planetary gearsets and has one sun gear member, which is held stationary for six of forward speeds and the reverse speed. The sun gear member is connected through a shaft to a torque-transmitting mechanism, which is disposed forward of an oil distribution snout and rearward of the vehicle engine.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: December 2, 2008
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Raymond J. Haka, Joel M. Maguire
  • Patent number: 7370744
    Abstract: In a friction engagement device of an automatic transmission, a brake piston is actuated by an oil pressure and a friction disc is pressed by the brake piston. The friction engagement device of an automatic transmission includes an oil pressure chamber extending in an annular shape and a main oil pressure supply path and a secondary oil pressure supply path each extending separately to supply oil to the oil pressure chamber. Each of the main oil pressure supply path and secondary oil pressure supply path connects to the oil pressure chamber in a position different from each other in a circumferential direction of the oil pressure chamber. With a construction as such, a friction engagement device of an automatic transmission is provided which prevents a load to the friction disc from locally increasing and attains a smooth speed-changing operation.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: May 13, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirofumi Fujita, Hiromichi Kimura, Kazuyuki Watanabe, Kazuaki Nakamura
  • Patent number: 7350633
    Abstract: An apply piston for a torque-transmitting mechanism in a power transmission includes a first circumferential periphery and a second circumferential periphery radially inward of the first circumferential periphery and axially displaced therefrom. The apply piston has a generally radially-extending face between the two peripheries. The two peripheries and the radially-extending face cooperate with a transmission case to form a fluid-filled chamber that is selectively expandable to direct fluid force to the piston for engagement of the torque-transmitting mechanism.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: April 1, 2008
    Assignee: General Motors Corporation
    Inventors: Patrick S. Portell, Teodor Mostior
  • Publication number: 20080028923
    Abstract: A hydraulic stroking device that performs stroking action by adjusting a pressure of hydraulic fluid in a fluid chamber is disclosed. The hydraulic device includes a hydraulic piston, a sealing member, and a variable sealing performance mechanism. The piston is provided in a fluid chamber, and receives the pressure of hydraulic fluid and is moved by the pressure. The sealing member seals between a circumferential surface of the piston and an inner surface of the fluid chamber. When the piston is not moving with the hydraulic fluid being pressurized, the variable sealing performance mechanism enhances the sealing performance of the sealing member compared to the sealing performance in a state when the piston is being moved.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 7, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Fujita, Kazuyuki Watanabe, Kazuaki Nakamura
  • Patent number: 7247114
    Abstract: A forward/reverse change-over mechanism (3) of an automatic transmission comprises a forward clutch (5) inside a drum (7) with the base (7c) which rotates together with an input shaft (1). The forward clutch (5) engages by driving a piston (9) housed in the drum (7) by the oil pressure of an oil chamber (10) between a base (7c) and the piston (9). Projecting bearings (16) which seat the piston (9) are formed by press-forming at equal angular intervals concentrically with the axial center of the drum (7) in the base (7c). By installing a sensor body (18) which responds to the passage of depressions (17) formed underneath the bearings (16), the forward/reverse change-over mechanism (3) can be made compact and manufactured with a small number of parts and machining steps.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: July 24, 2007
    Assignees: JATCO Ltd, Unipres Corporation
    Inventors: Takeshi Kaneda, Mitsumasa Yabutani, Hirofumi Maruyama
  • Patent number: 7128679
    Abstract: The present invention is directed to methods and systems for improving the operation of transmissions for automotive vehicles, and in particular the “factory installed” automotive transmissions installed by the original automobile manufacturer. The methods and systems in accordance with the present invention modify both the structural components and the hydraulic circuitry of the original automotive transmissions to enhance the operation of the modified transmissions. The improvements to the operation of the “factory installed” transmissions, and in particular the Allison transmission, include modification of the flow control valve to increase line pressure during lockup; modifications to the rotating clutch module to increase the torque held by the clutch and prevent clutch slippage, and modifications to the trim valves to adjust the pressure applied to the clutches for more efficient operation of the transmission.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: October 31, 2006
    Inventor: Gilbert W. Younger
  • Patent number: 7112156
    Abstract: A transmission includes a plurality of fluid passages configured to transmit fluid through the transmission for operating the transmission. A miniature electric motor is operatively connected to a moveable blocker positioned in one of the passages for actuating movement of the blocker between an open position in which fluid is allowed to flow through the passage, and a closed position in which the passage is blocked.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: September 26, 2006
    Assignee: General Motors Corporation
    Inventor: Joel M. Maguire
  • Patent number: 7083537
    Abstract: A multiple speed transmission for a motor vehicle includes a speed reduction gear set driveably connected to an input shaft, a planetary gear set having elements selectively driveably connected to the speed reduction gear set and input shaft, a first clutch and a second clutch, each clutch connected through the speed reduction gear set to the input shaft, a source of hydraulic fluid, and a first servo having a first fluid path connecting the fluid source and the first clutch, and a second fluid path connecting the fluid source and the second clutch, and a third fluid path connecting the lubrication fluid source and the lubrication circuit.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: August 1, 2006
    Assignee: Ford Global Technologies, LLC
    Inventors: Shaun Knowles, Jeffrey Maurer, Steven Thomas
  • Patent number: 7059988
    Abstract: A servo system employs at least two multiple disk clutches arranged in series to each other in an axial direction and at least two pistons used for engagement and disengagement of the respective clutches and arranged to be nested each other so that one of the pistons fits inside the other. Also provided is a servo system control device with a piston-stroke order control section. The piston-stroke order control section determines a timing of operation of each of the pistons for engagement of the respective clutches so that the pistons are operated in a specified order that the outside piston is operated prior to the inside piston.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: June 13, 2006
    Assignee: JATCO Ltd
    Inventor: Hirofumi Michioka
  • Patent number: 7011199
    Abstract: A friction disc in a tandem frictional engagement device, that is spline-fitted to a first coupling members is pressed by a first piston in a first direction, wherein the friction disc and another friction disc on the side of a first coupled member are clamped between the first piston and a first stopper member. A friction disc that is spline-fitted to a second coupling member is pressed by a second piston in an opposite direction, wherein the friction disc and another friction disc on the side of a second coupled member are clamped between the second piston and a second stopper member. A leading end of a first fitting portion of the first coupling member to which the friction disc is spline-fitted is the second stopper member and substantially abuts a second fitting portion of the second coupling member to which the friction disc is spline-fitted.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: March 14, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirofumi Onishi, Yuji Yasuda, Toshiki Kanada
  • Patent number: 7004871
    Abstract: An automatic transmission apparatus comprising, a first member rotating integrally with an input shaft and including a first cylindrical portion having an inner spline at an inner peripheral surface, a second member including a second cylindrical portion having an outer spline for engaging with the inner spline of the first member and a depressed portion formed on the second member and a clearance, which establishes a communication between an inner portion surrounded by the first and the second members and an outer portion of the first and the second members, is formed between the depressed portion of the second member and the inner surface of the first member.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: February 28, 2006
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Naoya Tanikawa
  • Patent number: 7001301
    Abstract: A transmission includes at least one planetary gear set, a first clutch pack having a plurality of first clutch plates, and a second clutch pack located in series axially with the first clutch pack. The second clutch pack has a plurality of second clutch plates. A clutch apply member associated with the second clutch pack protrudes through the first clutch plates of the first clutch pack. A substantially cylindrical seal member is positioned between the first clutch pack and second clutch pack for preventing substantial flow of cooling fluid between the first and second clutch packs to direct cooling fluid through the second clutch pack when the second clutch pack is applied by the clutch apply member.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: February 21, 2006
    Assignee: General Motors Corporation
    Inventor: Scott H. Wittkopp
  • Patent number: 6949042
    Abstract: A shiftable transmission in which at least two clutches (2, 7) actuated in closing direction by spring force and in opening direction by the exertion of pressure are arranged, wherein output of the transmission is stopped by unpressurized shifting of both actuation devices (9, 13) thereby closing both clutches (2, 7). When pressure is exerted upon the second actuation device (13), the actuation force of the first actuation device (9) is composed of a spring force of the first actuation device (9) and a hydraulic force from the pressurization of the second actuation device (13). The clutch belonging to the first actuation device can thus be impinged upon with different forces depending on whether or not the second actuation device is impinged upon with pressure.
    Type: Grant
    Filed: April 27, 2002
    Date of Patent: September 27, 2005
    Assignee: ZF Friedrichshafen AG
    Inventors: Helmut Eymüller, Siegfried Stützle, Jürgen Legner
  • Patent number: 6832974
    Abstract: A vehicle planetary gear device including a sun gear, a carrier, a ring gear, a clutch drum, clutch plates axially slidably fitted in the drum, a backing plate fixedly disposed in the drum on one side of a series of clutch plates, and a piston axially movable fitted in the drum and disposed on the other side of the series of clutch plates, and wherein the ring gear is fixedly fitted in the drum with its engaging teeth held in engagement with engaging grooves of the drum, and at least one retainer ring is fixed on the drum and disposed in contact with the teeth of one-piece member consisting of the ring gear and the backing plate, whereby axial movements of the backing plate and the ring gear relative to the drum are prevented by the at least one retainer ring.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: December 21, 2004
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Michitaka Kakamu, Hideki Yasue
  • Patent number: 6748171
    Abstract: A system and method is disclosed for providing multiple classes of communication services on a high-speed, high capacity communication platform over Wave Division Multiplexing (WDM) networks. A predetermined set of light channels of a WDM network is partitioned into one or more sub groups based on their wavelengths, each sub group is assigned for providing exclusively one communication service such as video, audio or data communication services. Each light channel is modulated by a predetermined set of orthogonal codes so that neighboring channel interferences can be minimized. Further, the predetermined set of orthogonal codes can be further divided into an even group and an odd group. These two groups of codes are assigned to two immediate neighboring light channels.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: June 8, 2004
    Assignee: Nortel Networks Limited
    Inventors: Fereidoun Homayoun, Saleh Faruque
  • Publication number: 20030190988
    Abstract: A high performance intermediate servo assembly wherein the servo piston has been modified to provide at least a 17% increase in surface apply area and a corresponding increase in hydraulic pressure delivered to the 2nd gear clutch band which it actuates is disclosed. The present servo piston is reconfigured to an overall length equivalent to the assembled stack-up dimensions of the original equipment servo piston, accumulator, accumulator spring, and spring retainer components and integrates the critical working surfaces thereof to retain proper function. Such original equipment components have been eliminated to simplify the intermediate servo assembly operation since shift feel is not a concern in this application. Further, the standard O-ring seals on the original equipment servo piston are replaced by high performance seals such as quad-lobed seals to ensure the hydraulic integrity of the present intermediate servo assembly under the increased fluid pressure generated.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 9, 2003
    Inventor: Brian G. Rowell
  • Publication number: 20010012808
    Abstract: In a transmission with a built-in planetary gear mechanism which has an element to be fixed to a casing of the transmission, inner elements are sub-assembled by mounting a plurality of transmission constituting members inclusive of the planetary gear mechanism. After containing the inner elements inside the casing, the element to be fixed is arranged to be fixable to the casing from a peripheral wall portion of the casing. The element to be fixed is fixed to the cylinder portion of a hydraulic brake to be built in the transmission. The cylinder portion is fixed to the casing by means of fixing members which are inserted into the casing from an outside of the peripheral wall portion of the transmission casing.
    Type: Application
    Filed: February 5, 2001
    Publication date: August 9, 2001
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shigeru Tajima, Masahiro Imamura, Yasuhiro Morimoto
  • Publication number: 20010006920
    Abstract: A power train for an automotive transmission includes first and second planetary gear sets disposed around an input shaft. The first and second planetary gear sets include a first sun gear, a first planet carrier, and a first ring gear. The second planetary gear set includes a second sun gear, a second planet carrier, and a second ring gear; the first planet carrier being fixedly connected to the second ring gear. The first sun gear is connected to the input shaft with a first clutch interposed between the first sun gear and the input shaft. The second planet carrier is connected to the input shaft with a second clutch interposed between the second planet carrier and the input shaft, and the second sun gear is connected to the input shaft with a third clutch interposed between the second sun gear and the input shaft. The fourth clutch and the second one-way clutch are disposed spaced away from each other in the axial direction of the input shaft.
    Type: Application
    Filed: December 21, 2000
    Publication date: July 5, 2001
    Inventor: Sung-Hoon Park
  • Patent number: 6110068
    Abstract: A method for controlling torque transfer between first and second friction elements in an automatic transmission having a hydraulic band brake servo in which a magnet is fixed to a displaceable piston, and a sensor producing a signal responsive to the sensed intensity of a field produced by the magnet representing the position of the servo piston, producing from the signal an indication of the position of the servo piston, determining a reference threshold servo position corresponding to incipient band brake torque capacity, and reducing pressure in the second friction element when the current servo displacement equals the threshold displacement.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: August 29, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventor: Marvin Paul Kraska
  • Patent number: 6110067
    Abstract: An automatic transmission is adjusted by changing the longitudinal position of a pin relative to a hydraulically-actuated piston, the pin being threaded into the piston. A holding socket engages the piston and prevents it from rotating while the pin is being adjusted. The holding socket engages a support guide which is contained within the transmission casing. The combination of the holding socket and the support guide replaces a spanner wrench, used in the prior art, and eliminates the need to disassemble the transmission to perform the adjustment, and also provides a more convenient way of making the adjustment in the cramped environment of an automatic transmission. The process therefore substantially reduces the time required to adjust an automatic transmission, and also reduces the likelihood of harm to the transmission, or injury to the technician, during the adjustment process.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: August 29, 2000
    Inventor: Robert D. Nuttall
  • Patent number: 5944627
    Abstract: A replacement mechanism or servo assembly for applying a band to an input member of an automatic transmission includes a housing in which an apply piston is located and to which an apply pin is connected. The piston is sealably movable in the housing and includes a major piston member having a first distal reaction face and a minor piston member integral with the major piston and having a second distal reaction face. A pressure fluid distribution device applies a working fluid against both of the first distal reaction face and the second distal reaction face in order to move the piston with the resultant force of the pressures on both reaction faces and to cause the apply pin to move toward the band to compress the band about the input member with this resultant force. In a preferred embodiment, the housing further includes a pressure separator immovably disposed between the first distal reaction face and an adjacent second proximal face of the minor piston member.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: August 31, 1999
    Assignee: Sonnax Industries, Inc.
    Inventors: Douglas L. Darling-Owen, Scott C. Jackson
  • Patent number: 5725079
    Abstract: A frictional engagement device for engaging a pair of members relatively rotating around a common axis is improved to obtain a smooth action. A first frictional engaging element is fitted unrotatably and axially movably to one of the relatively rotating member. A second frictional engaging element is unrotatably and axially movably fitted to the other of the relatively rotating member and disposed engageable to the first frictional engaging element. A first cam member which is axially movably fitted to one of the relatively rotating member and disposed apart from the second frictional engaging element has a slanted cam surface. A second cam member which is disposed adjacent to the first cam member on a side of the second frictional engaging element has a slanted cam surface parallelly opposing the cam surface of the first cam member. A piston means which is fitted to the second cam member has a surface engageable with the second frictional engagement element.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: March 10, 1998
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shogo Matsumoto, Kiyohito Murata
  • Patent number: 5700221
    Abstract: A cooling structure of an automatic transmission is provided which is capable of reducing the number of assembly parts and obtaining a high cooling efficiency by placing two heat sources away from each other. A high clutch device (15) is disposed between a front planetary gear device (13) and a rear planetary gear device (14) which is parallelly disposed in the direction in which an input shaft (4) in the front planetary gear device (13) extends. The high clutch device (15) includes a cylindrical clutch drum (15a), a clutch piston (15b) which slides in the direction of the input shaft (4) inside of the clutch drum portion (15a) and forms a piston-operating oil hydraulic chamber (20) in combination with the clutch drum portion (15a), and a plurality of clutch plates (15c) which are pressed by the clutch piston (15b) and laminated in the direction in which the input shaft (4) extends. The clutch drum (15a) is formed intetrally with a planetary carrier (18).
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: December 23, 1997
    Assignee: Jatco Corporation
    Inventor: Muneo Mizuta
  • Patent number: 5525115
    Abstract: A mechanical transmission for drive wheels, especially for mobile work machines, has a sprocket keyed on a drive shaft rotatably supported to a frame, an internally-cogged crown connected to a hub of a drive wheel of a work machine, and at least one intermediate gear wheel coupled to the sprocket and the crown and rotatably supported by an intermediate member. Two gear couplings are provided, each of which is equipped with own externally-activated means for command. The gear couplings connect the intermediate member with the frame and the drive shaft.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: June 11, 1996
    Inventor: Oddone Vanzini
  • Patent number: 5511644
    Abstract: A frictional engagement device for an automatic transmission, by which an input shaft and an output shaft are engaged or disengaged by use of oil pressure. A casing connected to an input shaft and a first piston disposed in the casing define a first oil pressure chamber. The first piston is rotationally movable by predetermined angle and is axially movable by predetermined distance relative to the casing. A second piston disposed in the first piston defines a second oil pressure chamber with the first piston, and the second piston is axially movable relative to the first piston. Separator plates axially slidably connected to the first piston and clutch discs axially slidably connected to a hub which is fixedly connected to the output shaft are engaged by a displacement of the second piston by supplying pressurized oil to the second oil pressure chamber and/or to the first oil pressure chamber.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: April 30, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kiyohito Murata
  • Patent number: 5477751
    Abstract: A clutch assembly for an automatic transmission comprises a side cover housing defining one part of an annular hollow space, a rotary member arranged inside of the annular hollow space defined by the side cover housing, at least one clutch plate axially movably engaged with the side cover housing, at least one second clutch plate axially movably engaged with the rotary member, and a piston arranged in the annular hollow space for thrusting the first and second clutch plates in the axial direction. A cover member is arranged adjacent to the side cover housing while defining the other part of the annular hollow space, and a part of the side surface of the cover member comes in contact with either one of the first and second clutch plates so as to restrict the axial displacement of the same therewith.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: December 26, 1995
    Assignee: Jatco Corporation
    Inventor: Masaya Akiyama