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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7762918 | Accumulator orifice plate for automatic transmission A modified automatic transmission includes a simple and inexpensive accumulator orifice plate residing between a valve control body and a second gear accumulator. The accumulator is in parallel fluid communication with a second gear servo and moderates changes to pr... | 07/27/2010 |
| 7351175 | Drive train for a motor vehicle A drive train for a motor vehicle includes a coupling device between a drive unit and a transmission for torque or moment transfer between the drive unit and the transmission. The coupling device has at least one coupling arrangement that can be activated by a press... | 04/01/2008 |
| 7128684 | Planetary transmissions having a stationary fixed interconnection and up to three input clutches The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward torque ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting... | 10/31/2006 |
| 7118510 | Planetary transmissions having input clutches and two interconnecting members The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting ... | 10/10/2006 |
| 7104914 | Planetary transmissions having two fixed interconnections and a stationary gear member The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting ... | 09/12/2006 |
| 7033297 | Shift control apparatus for automatic transmission A shift control apparatus for controlling shifting actions of an automatic transmission including a hydraulically operated frictional coupling device having a hydraulic cylinder which is supplied with a working fluid when the frictional coupling device is engaged, t... | 04/25/2006 |
| 6976931 | Eight speed transmissions with three planetary gear sets The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting ... | 12/20/2005 |
| 6949042 | Shiftable transmission 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 act... | 09/27/2005 |
| 6947821 | System and method for controlling an automatic transmission Parameter values related to hydraulic pressure characteristics of a solenoid valve in an automatic transmission are stored in a memory associated with a transmission main body. When a transmission control unit for controlling the transmission main body is installed ... | 09/20/2005 |
| 6913554 | Methods and systems for improving the operation of transmissions for motor vehicles 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 s... | 07/05/2005 |
| 6729989 | Method and systems for improving the operation of transmissions for motor vehicles Methods and systems for improving the operation of transmissions for automotive vehicles increase the main line fluid pressure of a “factory installed” transmission to permit shifting of gears at proper time intervals without undesireable side effects including ... | 05/04/2004 |
| 6582335 | Forward/reverse control system for continuously variable transmission Disclosed is a forward/reverse control system for a continuously variable transmission comprising pressure regulating means for controlling an inputted line pressure according to whether a forward or reverse state is required; a manual valve for selective... | 06/24/2003 |
| 6496767 | Constant groundspeed autoshift method and apparatus for maximizing fuel economy A method of determining shift points in a step gear transmission system to maximize fuel economy is disclosed. In operation, the method uses fuel economy data from a first gear ratio to determine a first series of constant fuel consumption curves for the ... | 12/17/2002 |
| 6432019 | Hydraulic circuit for toroidal continuous variable transmission A forward clutch choke (251) having an internal long narrow path is provided in an oil path which feeds a clutch pressure (PFWD/C) to an oil chamber (604) of a forward clutch mechanism (6). The choke restricts a flow of the hydraulic oil into t... | 08/13/2002 |
| 6224507 | Hydraulic control systems for automatic transmissions A hydraulic control system for an automatic transmission includes first and second passages connected to first and second engaging elements, first and second accumulators arranged with the first and second passages, and a timing valve connected to a back-... | 05/01/2001 |
| 6059681 | Neutral control device of automatic transmission A neutral control device of an automatic transmission is provided which includes a forward-drive engaging element that is engaged when a hydraulic pressure is supplied from a shift valve, so as to place the transmission in at least a 1st-speed gear positi... | 05/09/2000 |
| 5925086 | Vehicular automatic transmission and apparatus and method for controlling gear shift thereof In apparatus and method for controlling a gear shift of a vehicular automatic transmission, the automatic transmission the automatic transmission having a releasing frictional element, a clutching frictional element, and a source of a releasing working li... | 07/20/1999 |
| 5899831 | Automatic transmission upshift control apparatus An upshift is effected by releasing an engaged first friction element and engaging a released second friction element. The first fiction element operates on a fluid pressure applied thereto through a first passage and the second friction element operates ... | 05/04/1999 |
| 5882273 | Hydraulic control system of automatic transmission for automotive vehicle A hydraulic control system for an automatic transmission used in a vehicle, the hydraulic control system includes a pressure regulating part for regulating hydraulic pressure generated from a hydraulic pump to constant line pressure, a manual valve select... | 03/16/1999 |
| 5857935 | Upshift control device for automatic transmission An upshift control device for an automatic transmission is provided in which the transmission is shifted up by releasing an oil pressure from a first engaging element that has been engaged while applying an oil pressure to a second engaging element that h... | 01/12/1999 |
| 5807208 | Hydraulic control system of an automatic transmission for a vehicle A hydraulic control system of an automatic transmission. A pressure regulator valve of the hydraulic control system includes a pressure reducing valve for reducing oil pressure created in an oil pump to a predetermined level; a duty solenoid valve for cre... | 09/15/1998 |
| 5700220 | Power-shiftable gear, especially two-speed planet gear The invention relates to a power-shiftable two-speed gear. The gear is designed as planet gear (3). The two ratios can be hydraulically shifted via two friction clutches (9 and 10). At least one of the friction clutches (9 or 10) is fitted with a mechanis... | 12/23/1997 |
| 5697864 | Shift control apparatus for an automatic transmission A shift control apparatus for an automatic transmission includes a first transmission gear unit equipped with a clutch to clutch shift mechanism and a second transmission gear unit which is operatively connected in series with the first transmission gear ... | 12/16/1997 |
| 5695423 | Hydraulic control device for automatic transmission In a hydraulic control device for an automatic transmission for obtaining the optimum shift-down timing by regulating an accumulator back pressure for an engaging element to be engaged in low-speed gear positions, switch control means is provided for comm... | 12/09/1997 |
| 5667453 | Hydraulic control system of an automatic transmission used in a vehicle A hydraulic control system of a vehicle automatic transmission includes a torque converter, an oil pump, a pressure regulator, a damper clutch working control means, a manual valve, an N-D control valve, a torque control regulator valve, a control switch ... | 09/16/1997 |
| 5665020 | Automatic transmission control system A control system for an automatic transmission having at least a friction coupling element which is coupled with a hydraulic pressure increasing by way of a leveled transitional pressure has an accumulator which discharge a high level of pressure accumula... | 09/09/1997 |
| 5626533 | Hydraulic control system of an automatic transmission used in a vehicle A hydraulic control system of an automatic transmission, which includes a line pressure regulator for regulating the hydraulic pressure supplied from an oil pump to the hydraulic control line, and a shift structure for selectively delivering the regulated... | 05/06/1997 |
| 5542888 | Automatic transmission control system with variable pressure discharge An automatic transmission control system has first and second hydraulic circuits leading to a low/reverse brake and a reverse clutch, respectively, which perform supplying and discharging of hydraulic pressure to the low/reverse brake and reverse clutch, ... | 08/06/1996 |
| 5538480 | Hydraulic pressure control apparatus for servo system of automatic transmission A pressure control apparatus which controls a hydraulic pressure to be supplied to a hydraulic servo system of an automatic transmission. The pressure control valve includes a shift control valve for controlling the hydraulic pressure to be supplied to th... | 07/23/1996 |
| 5515272 | Apparatus for diagnosing automatic transmission based on engine speed as compared with reference range A diagnosing apparatus for diagnosing a vehicle automatic transmission system including an automatic transmission having frictional coupling devices, and solenoid-operated valves for controlling the frictional coupling devices to shift the automatic trans... | 05/07/1996 |
| 5509860 | Powershift gear box, in particular two-speed epicyclic gear box The invention relates to hydraulically engaged by means of two friction clutches (9 and 10). For that purpose, friction elements (outer and inner disks 13, 14 and 19, 20) are alternatively engaged and disengaged by the force exerted by plate springs (16, ... | 04/23/1996 |
| 5507700 | Hydraulic control unit for a vehicle automatic transmission A hydraulic control unit for an automatic transmission having a plurality of power transmitting paths and a plurality of engaging clutches and/or brakes for selecting any one of the transmitting paths to set a gear position. The unit comprises a regulator... | 04/16/1996 |
| 5492508 | Hydraulic control system for an automatic transmission A controller of an automatic transmission provides gear changes with optimum gear change characteristics under any traveling conditions. The controller of the automatic transmission of the present invention includes an input torque detector for determinin... | 02/20/1996 |
| 5478288 | Automatic power transmission of automotive vehicle An automatic power transmission of an automotive vehicle includes various frictional elements and frictional brakes and can prevent a shift shock from occurring by increasing a working hydraulic pressure applied to a certain frictional element (forward cl... | 12/26/1995 |
| 5431608 | Method and device for controlling clutch of automotive automatic transmission An automotive automatic transmission has a hydraulically operated clutch device and an electronic control unit. The clutch device includes drive and driven clutch plates and a piston for pressing the drive and driven clutch plates to establish an engageme... | 07/11/1995 |
| 5403242 | Automatic transmission with one-way clutch friction suppression system Under a higher speed gear position of the transmission, a control valve can drain a hydraulic pressure of a forward clutch to cause the forward clutch to take a disengaged condition. With this, undesired friction of a forward one-way clutch under such hig... | 04/04/1995 |
| 5397284 | Shift control method and system for automatic transmission An automobile automatic transmission shift control system, for causing a specific gear shift by unlocking a first frictional element with a simultaneously with locking a second frictional element, discharges locking pressure from the first frictional elem... | 03/14/1995 |
| 5393273 | Powertrain and control having a plurality of accumulators A multi-speed transmission has a hydraulic control system for establishing a plurality of forward drive ratios and a reverse drive ratio. Each drive ratio is established by the engagement of a fluid operated friction device, such as a clutch or brake. The... | 02/28/1995 |
| 5366420 | Automatic transmission control system An automatic transmission has a hydraulic circuit which controls supply of engaging pressures to friction coupling elements. The hydraulic circuit has a first hydraulic passage having a hydraulic pressure control valve including an accumulator, a second h... | 11/22/1994 |
| 5246407 | Automatic selector of a motor vehicle epicyclic change-speed gearbox In an automatic selector device of an epicyclic change-speed gearbox, a frictional connection, i.e. a clutch or brake, participating in the selection of a forward gear is engaged by a pressure medium setting element and disengaged by a spring device. In a... | 09/21/1993 |
