Patents by Inventor Takumi Sinojima
Takumi Sinojima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7618341Abstract: In a continuously variable transmission apparatus, by adjusting the transmission ratio of a toroidal continuously variable transmission, an output shaft can be stopped while an input shaft is left rotating in one direction by a drive source. And, when, while the vehicle is running, a select lever is operated to a select position in the reverse direction to the vehicle running direction, in a state where a clutch device is connected, the speed ratio of the continuously variable transmission apparatus is changed from a value corresponding to the vehicle running state to a value 0 capable of realizing the above-mentioned stopping state along a preset condition.Type: GrantFiled: May 21, 2007Date of Patent: November 17, 2009Assignee: NSK Ltd.Inventor: Takumi Sinojima
-
Patent number: 7601088Abstract: A control unit is imparted a function in which the engagement of a high-speed clutch which had been in disengagement until then is started (or the energization of a high-speed clutch solenoid switch valve is put to ON) before a change-speed of a toroidal continuously variable transmission has reached an optimal value for performance of a mode switch (a point A, for example, 0.46 in a speed increasing ratio) or at a point B (for example, 0.6 in the speed increasing ratio). As a result of this, the problem can be solved.Type: GrantFiled: May 25, 2007Date of Patent: October 13, 2009Assignee: NSK Ltd.Inventors: Takumi Sinojima, Eiji Inoue
-
Patent number: 7520832Abstract: A sleeve 28 making up a gear ratio control valve 21 is driven by not only a stepping motor 29 but also a secondary actuator 47. Pressure oil is made free to be introduced into the secondary actuator 47 through a manual oil pressure switching valve 37 which is switched over by a gearshift. Then, when the gearshift is operated from a non-running state to a running state, a gear ratio of a toroidal type continuously variable transmission is corrected by a predetermined amount by driving the sleeve 28 by the secondary actuator 47. As a result, while improving characteristic of a vehicle when starting from rest, the vehicle can be prevented from being reduced in speed unintentionally excessively even when the gearshift is operated while running.Type: GrantFiled: May 16, 2006Date of Patent: April 21, 2009Assignee: NSK Ltd.Inventors: Toshiro Toyoda, Eiji Inoue, Takashi Imanishi, Takumi Sinojima
-
Publication number: 20080058155Abstract: In a continuously variable transmission apparatus, by adjusting the transmission ratio of a toroidal continuously variable transmission, an output shaft can be stopped while an input shaft is left rotating in one direction by a drive source. And, when, while the vehicle is running, a select lever is operated to a select position in the reverse direction to the vehicle running direction, in a state where a clutch device is connected, the speed ratio of the continuously variable transmission apparatus is changed from a value corresponding to the vehicle running state to a value 0 capable of realizing the above-mentioned stopping state along a preset condition.Type: ApplicationFiled: May 21, 2007Publication date: March 6, 2008Applicant: NSK LTD.Inventor: Takumi SINOJIMA
-
Patent number: 7326147Abstract: A continuously variable transmission apparatus includes a toroidal continuously variable transmission, a planetary gear transmission and a clutch apparatus that connects the toroidal continuously variable transmission and the planetary gear transmission. The clutch apparatus includes: a low speed clutch a high speed clutch and a controller. The controller controls the transmission ratio of the toroidal continuously variable transmission so that rotational speeds of members connected via the clutch apparatus equals with each other, and then disengages the one of the low speed clutch and the high speed clutch after engaging the other, whereby an instance of simultaneously transmitting the power by the two clutches is set during a time period until disconnecting the other clutch after starting to transmit the power by the one clutch.Type: GrantFiled: March 9, 2005Date of Patent: February 5, 2008Assignee: NSK Ltd.Inventors: Takashi Imanishi, Eiji Inoue, Takumi Sinojima, Toshirou Toyoda
-
Publication number: 20070275810Abstract: A control unit is imparted a function in which the engagement of a high-speed clutch which had been in disengagement until then is started (or the energization of a high-speed clutch solenoid switch valve is put to ON) before a change-speed of a toroidal continuously variable transmission has reached an optimal value for performance of a mode switch (a point A, for example, 0.46 in a speed increasing ratio) or at a point B (for example, 0.6 in the speed increasing ratio). As a result of this, the problem can be solved.Type: ApplicationFiled: May 25, 2007Publication date: November 29, 2007Applicant: NSK LTD.,Inventors: Takumi Sinojima, Eiji Inoue
-
Patent number: 7273440Abstract: A continuously variable transmission apparatus includes a toroidal-type continuously variable transmission, a planetary gear type transmission and a clutch apparatus that connects the toroidal-type continuously variable transmission and the planetary gear type transmission. The clutch apparatus includes: a low speed clutch engaged for realizing a low speed mode and disengaged for realizing a high speed, a high speed clutch engaged for realizing the high speed mode and disengaged for realizing the low speed mode and a controller. The controller controls the transmission ratio of the toroidal-type continuously variable transmission so that rotational speeds of members connected via the clutch apparatus equals with each other, and then disengages the one of the low speed clutch and the high speed clutch after engaging the other.Type: GrantFiled: June 24, 2004Date of Patent: September 25, 2007Assignee: NSK Ltd.Inventors: Takashi Imanishi, Eiji Inoue, Takumi Sinojima, Toshiro Toyoda
-
Publication number: 20060264295Abstract: A sleeve 28 making up a gear ratio control valve 21 is driven by not only a stepping motor 29 but also a secondary actuator 47. Pressure oil is made free to be introduced into the secondary actuator 47 through a manual oil pressure switching valve 37 which is switched over by a gearshift. Then, when the gearshift is operated from a non-running state to a running state, a gear ratio of a toroidal type continuously variable transmission is corrected by a predetermined amount by driving the sleeve 28 by means of the secondary actuator 47. As a result, while improving characteristic of a vehicle when starting from rest, the vehicle can be prevented from being reduced in speed unintentionally excessively even when the gearshift is operated while running.Type: ApplicationFiled: May 16, 2006Publication date: November 23, 2006Inventors: Toshiro Toyoda, Eiji Inoue, Takashi Imanishi, Takumi Sinojima
-
Publication number: 20050202930Abstract: A continuously variable transmission apparatus includes a toroidal continuously variable transmission, a planetary gear transmission and a clutch apparatus that connects the toroidal continuously variable transmission and the planetary gear transmission. The clutch apparatus includes: a low speed clutch a high speed clutch and a controller. The controller controls the transmission ratio of the toroidal continuously variable transmission so that rotational speeds of members connected via the clutch apparatus equals with each other, and then disengages the one of the low speed clutch and the high speed clutch after engaging the other, whereby an instance of simultaneously transmitting the power by the two clutches is set during a time period until disconnecting the other clutch after starting to transmit the power by the one clutch.Type: ApplicationFiled: March 9, 2005Publication date: September 15, 2005Inventors: Takashi Imanishi, Eiji Inoue, Takumi Sinojima, Toshirou Toyoda
-
Publication number: 20050049109Abstract: A continuously variable transmission apparatus includes a toroidal-type continuously variable transmission, a planetary gear type transmission and a clutch apparatus that connects the toroidal-type continuously variable transmission and the planetary gear type transmission. The clutch apparatus includes: a low speed clutch engaged for realizing a low speed mode and disengaged for realizing a high speed, a high speed clutch engaged for realizing the high speed mode and disengaged for realizing the low speed mode and a controller. The controller controls the transmission ratio of the toroidal-type continuously variable transmission so that rotational speeds of members connected via the clutch apparatus equals with each other, and then disengages the one of the low speed clutch and the high speed clutch after engaging the other.Type: ApplicationFiled: June 24, 2004Publication date: March 3, 2005Inventors: Takashi Imanishi, Eiji Inoue, Takumi Sinojima, Toshiro Toyoda