Bizarre Patents
A beach chair which can be adapted for a woman who is pregnant and wishes to sunbathe in the prone position.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7678018 | Method for implementing shifts from a source gear to a target gear of an automatic shift transmission, in particular downshifts of an automatic shift transmission A method for implementing shifts from a source gear to a target gear of an automatic shift transmission includes storing a respective upshift threshold and a respective downshift threshold for each possible sequential gear shift. The respective upshift threshold and... | 03/16/2010 |
| 7608013 | Transmission downshift control method A method of controlling a downshift in a transmission having a main box and a compounder that has at least one gearset and at least one friction element separate from the main box includes initiating an upshift in the compounder including application of at least one... | 10/27/2009 |
| 7563198 | Shift control device and shift control method of automatic transmission A shift control device of a vehicular automatic transmission that establishes a plurality of gear steps of different speed change ratios by selectively engaging a plurality of friction engagement devices ends the shift control by making an engagement end determinati... | 07/21/2009 |
| 7232021 | Method and assembly for controlling a centrifugal clutch A centrifugal clutch assembly includes a sleeve movable to selectively engage the clutch assembly independent of rotational speed. The clutch assembly includes centrifugal weights that move radially responsive to rotation of the clutch assembly. The centrifugal weig... | 06/19/2007 |
| 7089102 | Coasting downshift control for automatic transmissions An automatic transmission ratio shift control system and method for a powertrain having an engine and multiple-ratio gearing controlled by friction elements actuated by hydraulic pressure, an electronic controller for establishing torque transitions among the fricti... | 08/08/2006 |
| 7081068 | Transmission system for work vehicle A transmission system for a work vehicle, which is capable of reliably mitigating, with relatively simple arrangement, shocks caused by speed changes even in a work vehicle such as a bulldozer in which almost all operations are performed with the engine operating at... | 07/25/2006 |
| 7074158 | Shift control apparatus of automatic transmission of motor vehicle A shift control apparatus of an automatic transmission of a motor vehicle to which torque is transmitted from an engine via a fluid coupling device is provided. In the automatic transmission including a plurality of hydraulically operated friction elements, a clutch... | 07/11/2006 |
| 6929582 | Method for controlling variable compression ratio of an engine having an automatically controlled transmission A system is described for minimizing engine torque disturbances that would otherwise cause degraded drive feel by a vehicle driver. The system utilizes multiple torque transmission paths of a transaxle unit mounted to the engine. The system manipulates the torque tr... | 08/16/2005 |
| 6835164 | Shift-control method for a vehicular automatic transmission A method for controlling a gear shift in an automatic transmission of a motor vehicle that is carried out as a deceleration shift of at least one engaging shifting element, without use of a mechanical free-wheeling condition. To increase the ride comfort, it is prop... | 12/28/2004 |
| 6442466 | Manual operation control of automatic transmission A first switch (2) which can select a manual mode, and a second switch (5, 6) which can select one of an upshift and a downshift, are provided. A microprocessor (1) varies a speed ratio of an automatic transmission (10) according to the specification of t... | 08/27/2002 |
| 6254510 | Coasting downshift control strategy for a multiple-ratio automatic transmission A control strategy for a multiple-ratio transmission for an automotive vehicle comprising a shift valve system that responds to shift valve signals developed by a microprocessor controller, the controller being in communication with engine sensors indicat... | 07/03/2001 |
| 6175797 | Speed change control apparatus of automatic transmission Under a condition where a manual mode is selected by a selecting lever, when a down-shift switch is turned ON and down-shift is requested, an engine speed NED after the down shift is calculated (step S12), and if this engine speed exceeds the o... | 01/16/2001 |
| 6068576 | Hydraulic control system for automatic transmission When a vehicle driving state of an automatic transmission is changed to a power-off state from a power-on state during a down shift involving the disengagement of one friction element and the engagement of another friction element, a disengagement side pr... | 05/30/2000 |
| 6024672 | Shift control method for an automatic transmission A shift control method for an automatic transmission not equipped to undergo skip shifting. Various skip shifting patterns are realized by detecting changes in turbine RPM, and delaying shifting if it is determined that turbine RPM are irregular, thereby ... | 02/15/2000 |
| 5951439 | Automatic transmission hydraulic control system with solenoid-valve controlled shift timing control valve Disclosed is a hydraulic control system used in an automatic transmission for a vehicle which includes a plurality of friction elements associated with respective transmission speeds, a hydraulic pressure source, a hydraulic pressure regulating controller... | 09/14/1999 |
| 5842949 | Automatic transmission control system A control system for controlling an automatic transmission equipped with a torque converter which is locked and unlocked through a lockup clutch has a lockup release control device which releases locking of the torque converter at different release rates ... | 12/01/1998 |
| 5827152 | Control system for automtic transmission for vehicle A slip detecting device detects slipping of a selected hydraulically engaged element of an automatic transmission during non-shifting, and a determining device determines a hydraulically engaged element larger in driving-force transmitting capacity than t... | 10/27/1998 |
| 5803866 | Control system for automatic transmission During transmission shifts, a band brake is used in either a self-loosening direction in which an engaging force thereof is not sensitive to variations in hydraulic pressure or a self-tightening direction in which the engaging force is sensitive to variat... | 09/08/1998 |
| 5749806 | System and method for controlling hydraulic pressure of an automatic transmission for vehicles A hydraulic control system of an automatic transmission for a vehicle includes a line pressure control part for converting line pressure from a hydraulic pump into constant hydraulic pressure. A torque pressure generating part converts the constant hydrau... | 05/12/1998 |
| 5565000 | Hydraulic control system of automatic transmission for automotive vehicle A hydraulic control system of an automatic transmission for an automotive vehicle includes a hydraulic pump, a pressure regulating valve, a torque converter, a converter clutch, first, second and third solenoid valves, first through eighth friction elemen... | 10/15/1996 |
| 5473543 | Shift timing detecting system for automatic transmission A shift timing detecting system for detecting the start of a shift of an automatic transmission A in terms of a change in the R.P.M. of a predetermined rotary member after a shift command has been outputted. The shift timing detecting system comprises: a ... | 12/05/1995 |
| 5445579 | Speed change control apparatus and method for an automatic transmission in a vehicle A speed change control method and apparatus for a vehicular automatic transmission having a first-speed clutch for establishing a first speed and a second-speed clutch for establishing a second speed, includes subjection of at least a duty ratio Dr of a s... | 08/29/1995 |
| 5403248 | Control system for changing servo timings of hydraulic pressure based on a torque input in automatic transmission A control system is provided for servo hydraulic pressure in an automatic transmission having planetary gear mechanisms. First and second frictional engagement devices, whose servo pressures are reversed in feed/drain relationship between desired two high... | 04/04/1995 |
| 5092199 | Hydraulic control apparatus for automatic transmissions A hydraulic control apparatus for an automatic transmission has friction elements for performing a downshift by releasing one friction engaging element and engaging another. The apparatus includes duty control valves connected to the friction engaging ele... | 03/03/1992 |
| 5069085 | Shift control system for automatic power transmission with enhanced shifting transition characteristics A shift control system is provided with first and second down shifting criteria. The first down shifting criterion is set at a higher vehicle speed than that of the second down shifting criterion so that actual down shifting operations take place at a hig... | 12/03/1991 |
| 5032993 | Control for an automatic transmission An automatic transmission is controlled by detecting engine rmp following a transmission downshift and comparing the detected engine speed with a predetermined speed value. If the detected speed does not exceed the predetermined value, the solenoids contr... | 07/16/1991 |
| 4903550 | Hydraulic control device for automatic transmission A hydraulic control device for an automatic transmission, having a gear ratio different from that of usual D range by a manual shift down from the D range to range 3 or 2, is mounted on an automobile. A first solenoid valve, a first shift valve and a seco... | 02/27/1990 |
| 4870877 | Hydraulic control circuit for automatic transmission A hydraulic control circuit for an automatic transmission is provided in which the automatic transmission has at least five forward gear shift stages. A plurality of solenoid valves are connected to hydraulic shift valves for controlling hydraulic line pr... | 10/03/1989 |
| 4846022 | Vehicular automatic transmission control system with gear shift inhibitor A vehicular automatic transmission control system comprising: a hydraulic control circuit including a hydraulic pressure source, a pressure regulator valve for producing a line pressure by regulating the oil pressure supplied from the pressure source, a n... | 07/11/1989 |
| 4838126 | Electro/hydraulic control system for an automatic transmission An electro/hydraulic control system for automatically shifting gear stages of a multiple stage transmission gear mechanism by selectively controlling the operable effectiveness of various hydraulically operated friction units in accordance with vehicle op... | 06/13/1989 |
| 4662249 | Shift valve with an intermediate position during a 4-2 shift A hydraulic control system for an automatic transmission of a motor vehicle, which is provided with a bleed valve in a fluid chamber of a particular shift valve for restricting pressure increase when line pressure is admitted thereinto for a jumping shift... | 05/05/1987 |
| 4569253 | Kickdown control for a motor vehicle automatic transmission with two stage kickdown A vehicle automatic transmission including a torque converter, a multiple stage transmission gear mechanism connected with the torque converter and a hydraulic control circuit for automatically selecting one of gear stages of the transmission gear mechani... | 02/11/1986 |
| 4563917 | Two stage kickdown control system for a motor vehicle automatic transmission A vehicle automatic transmission including a torque converter, a multiple stage transmission gear mechanism connected with the torque converter and a hydraulic control circuit for automatically selecting one of gear stages of the transmission gear mechani... | 01/14/1986 |
| 4131036 | Method and apparatus for transmission control system A control system to change gear ratio in an automatic transmission through friction elements engaged by hydraulic pressure. A closed loop electrical circuit is completed between a transducer, which provides an electrical signal related to the output torqu... | 12/26/1978 |
| 4015488 | Digital electronic controller for power transmission A power transmission system includes an engine-driven lockup type torque converter for driving a gear shift mechanism shiftable to different speed ranges by solenoid operated clutch valves. A digital electronic controller provides output signals to operat... | 04/05/1977 |
