Patents by Inventor Takafumi Uemoto
Takafumi Uemoto 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: 11022178Abstract: A sealing device includes a seal member and a slinger. The slinger has a slinger fixing part, a first radial part, a first axial part, a second radial part, and a second axial part facing a seal fixing part of the seal member in a radial direction across a first clearance. The seal member has a large-diameter part facing, in an axial direction, an end of the second axial part on the other side in an axial direction across a second clearance. An outer circumferential surface of the large-diameter part and an outer circumferential surface of the second axial part are included in a flow passage surface of a continuous outside flow passage that extends in a straight line along the axial direction. The first clearance and the second clearance communicate with each other, and the sealing device has a labyrinth clearance including the first clearance and the second clearance.Type: GrantFiled: February 26, 2020Date of Patent: June 1, 2021Assignee: JTEKT CORPORATIONInventors: Takafumi Uemoto, Yuya Yamamoto, Takuya Toda, Suguru Nakajima
-
Publication number: 20210025453Abstract: A sealing structure includes a seal member and a slinger. The seal member includes a gutter positioned between a seal fixing portion and a seal lip in an axial direction. The gutter and the seal lip are positioned at different positions in the axial direction, and a first axially extending portion radially faces a whole of the seal lip and a part of the gutter on one axial side. A communication portion communicating with an outside of the sealing structure is formed between the seal fixing portion and the first axially extending portion. The communication portion radially faces a part of the gutter on the other axial side.Type: ApplicationFiled: March 6, 2019Publication date: January 28, 2021Applicant: JTEKT CORPORATIONInventor: Takafumi UEMOTO
-
Publication number: 20200347884Abstract: A seal assembly device is configured to attach an annular seal by press-fitting to an axial end portion of a first raceway member of a wheel bearing device. The seal assembly device includes: a columnar guide member including a contact surface configured to contact a plurality of rolling elements provided along a raceway surface formed on the first raceway member from a side opposite to the raceway surface, the contact surface being continuous in a circumferential direction; a pressing member configured to move in an axial direction along the guide member toward the axial end portion so as to press the seal in the axial direction and to press-fit the seal into the axial end portion; and a reference member configured to restrict a movement stroke of the pressing member with respect to the guide member in the axial direction.Type: ApplicationFiled: January 31, 2019Publication date: November 5, 2020Applicant: JTEKT CORPORATIONInventors: Kenichi MORITA, Daisuke YAMASAKI, Mitsuru SAWANO, Takafumi UEMOTO
-
Publication number: 20200292002Abstract: A sealing device includes a seal member and a slinger. A labyrinth clearance is provided in a part of a clearance between the seal member and the slinger. The labyrinth clearance includes an outer clearance that opens toward the outside, a central clearance which is continuous with the outer clearance and of which a flow passage direction intersects with that of the outer clearance, and an inner clearance which is continuous with the central clearance and of which a flow passage direction intersects with that of the central clearance. An opening of the outer clearance has a dimension of 0.3 mm or larger and 0.7 mm or smaller. The central clearance has a length of 3 mm or longer in the flow passage direction. The inner clearance has a clearance dimension of 0.3 mm or larger and 1.0 mm or smaller.Type: ApplicationFiled: February 28, 2020Publication date: September 17, 2020Applicant: JTEKT CORPORATIONInventors: Takafumi UEMOTO, Yuya YAMAMOTO, Takuya TODA, Suguru NAKAJIMA
-
Publication number: 20200292001Abstract: A sealing device includes a seal member and a slinger. The slinger has a slinger fixing part, a first radial part, a first axial part, a second radial part, and a second axial part facing a seal fixing part of the seal member in a radial direction across a first clearance. The seal member has a large-diameter part facing, in an axial direction, an end of the second axial part on the other side in an axial direction across a second clearance. An outer circumferential surface of the large-diameter part and an outer circumferential surface of the second axial part are included in a flow passage surface of a continuous outside flow passage that extends in a straight line along the axial direction. The first clearance and the second clearance communicate with each other, and the sealing device has a labyrinth clearance including the first clearance and the second clearance.Type: ApplicationFiled: February 26, 2020Publication date: September 17, 2020Applicant: JTEKT CORPORATIONInventors: Takafumi UEMOTO, Yuya YAMAMOTO, Takuya TODA, Suguru NAKAJIMA
-
Patent number: 10385922Abstract: A wheel bearing apparatus includes an outer ring, an inner shaft member, rolling elements, a cage, and a sealing device. The sealing device includes an annular slinger and a sealing member. The slinger has a first inclined surface provided on a radially outer side and on a side facing the sealing member such that a diameter of the first inclined surface increases toward a first side in an axial direction. The sealing member has a second inclined surface provided on the radially outer side and on a side facing the slinger such that a diameter of the second inclined surface increases toward a second side in the axial direction. The second inclined surface intersects with a virtual extension surface extending radially outwardly along the first inclined surface, and the second inclined surface is continuous with an inner peripheral surface of the radially outer portion.Type: GrantFiled: July 3, 2018Date of Patent: August 20, 2019Assignee: JTEKT CORPORATIONInventors: Yuya Inoue, Takuya Toda, Teruyuki Wakisaka, Takafumi Uemoto, Chiyoko Furuta
-
Publication number: 20190017551Abstract: A wheel bearing apparatus includes an outer ring, an inner shaft member, rolling elements, a cage, and a sealing device. The sealing device includes an annular slinger and a sealing member. The slinger has a first inclined surface provided on a radially outer side and on a side facing the sealing member such that a diameter of the first inclined surface increases toward a first side in an axial direction. The sealing member has a second inclined surface provided on the radially outer side and on a side facing the slinger such that a diameter of the second inclined surface increases toward a second side in the axial direction. The second inclined surface intersects with a virtual extension surface extending radially outwardly along the first inclined surface, and the second inclined surface is continuous with an inner peripheral surface of the radially outer portion.Type: ApplicationFiled: July 3, 2018Publication date: January 17, 2019Applicant: JTEKT CORPORATIONInventors: Yuya INOUE, Takuya TODA, Teruyuki WAKISAKA, Takafumi UEMOTO, Chiyoko FURUTA
-
Patent number: 9097295Abstract: A one-way clutch used in a wind turbine generator connects an input rotor with an output rotor so that the input rotor and the output rotor are rotatable together with each other when a main shaft rotates in a forward direction and rotation speed of the input rotor is higher than rotation speed of the output rotor, and disconnects the input rotor and the output rotor from each other when the rotation speed of the input rotor is lower than the rotation speed of the output rotor. Further, the wind turbine generator includes a second one-way clutch that permits transmission of force caused by the rotation of the main shaft, to the input rotor when the main shaft rotates in the forward direction, and restricts the rotation of the main shaft when the main shaft tries to rotate in a reverse direction.Type: GrantFiled: September 30, 2013Date of Patent: August 4, 2015Assignee: JTEKT CORPORATIONInventors: Hideki Fujiwara, Kazushige Ootsuka, Takafumi Uemoto, Nobuyuki Rito
-
Patent number: 8770053Abstract: A transmission has a simple structure and can be produced at a low cost. A second electromagnetic clutch is shut off at a timing when an electric motor is decelerated and before selecting motion is finished, and thereafter, a shift/select shaft is moved to a terminal end position of the selecting motion with an inertia of a driven part (a second output hub) of the second electromagnetic clutch. At a timing after a predetermined period has passed from the timing, a first electromagnetic clutch for the next shifting motion is connected. The electric motor is driven synchronously with the end of the selecting motion or immediately in response to the end, thereby to start the next shifting motion. In this manner, gear change can be rapidly conducted.Type: GrantFiled: February 23, 2011Date of Patent: July 8, 2014Assignee: JTEKT CorporationInventor: Takafumi Uemoto
-
Patent number: 8714041Abstract: A transmission that is able to perform shift operation and select operation using the driving force of a single electric motor is provided. A shift/select actuating device includes: an electric motor; a first conversion mechanism; a second conversion mechanism; and a changing unit that changes a destination, to which the rotational driving force of the electric motor is transmitted, between the first conversion mechanism and the second conversion mechanism. The changing unit includes: a first electromagnetic clutch that transmits the rotational driving force of the electric motor to the first conversion mechanism or interrupts the rotational driving force; and a second electromagnetic clutch that transmits the rotational driving force to the second conversion mechanism or interrupts the rotational driving force.Type: GrantFiled: August 31, 2010Date of Patent: May 6, 2014Assignee: JTEKT CorporationInventors: Yasuhiro Yukitake, Akiyoshi Tashiro, Hiroki Kagawa, Takafumi Uemoto
-
Publication number: 20140090945Abstract: A one-way clutch used in a wind turbine generator connects an input rotor with an output rotor so that the input rotor and the output rotor are rotatable together with each other when a main shaft rotates in a forward direction and rotation speed of the input rotor is higher than rotation speed of the output rotor, and disconnects the input rotor and the output rotor from each other when the rotation speed of the input rotor is lower than the rotation speed of the output rotor. Further, the wind turbine generator includes a second one-way clutch that permits transmission of force caused by the rotation of the main shaft, to the input rotor when the main shaft rotates in the forward direction, and restricts the rotation of the main shaft when the main shaft tries to rotate in a reverse direction.Type: ApplicationFiled: September 30, 2013Publication date: April 3, 2014Applicant: JTEKT CORPORATIONInventors: Hideki FUJIWARA, Kazushige OOTSUKA, Takafumi UEMOTO, Nobuyuki RITO
-
Publication number: 20130052058Abstract: A pump body is formed of a pump housing and a pump plate provided in front of the pump housing. A motor housing is fixed to a rear end of the pump housing, and accommodates a pump driving electric motor. A bearing device that supports a motor shaft includes a first bearing that is arranged in a closed-end hole formed in a rear face of the pump plate and supporting a front end portion of the motor shaft, and a second bearing that is arranged radially inward of a cylindrical bearing support portion formed in the pump housing and extending inside the motor housing and that supports a middle portion of the motor shaft. A pump rotor is arranged between the first bearing and the second bearing.Type: ApplicationFiled: August 29, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventors: Nobutsuna MOTOHASHI, Takafumi UEMOTO
-
Publication number: 20120318089Abstract: An object of the invention is to provide a transmission device which has a simple structure and can be produced at a low cost. A second electromagnetic clutch is shut off at a timing when an electric motor is decelerated and before selecting motion is finished, and thereafter, a shift/select shaft is moved to a terminal end position of the selecting motion with an inertia of a driven part (a second output hub) of the second electromagnetic clutch. At a timing after a predetermined period has passed from the timing, a first electromagnetic clutch for the next shifting motion is connected. The electric motor is driven synchronously with the end of the selecting motion or immediately in response to the end, thereby to start the next shifting motion. In this manner, gear change can be rapidly conducted.Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Applicant: JTEKT CORPORATIONInventor: Takafumi Uemoto
-
Publication number: 20120144942Abstract: A transmission that is able to perform shift operation and select operation using the driving force of a single electric motor is provided. A shift/select actuating device includes: an electric motor; a first conversion mechanism; a second conversion mechanism; and a changing unit that changes a destination, to which the rotational driving force of the electric motor is transmitted, between the first conversion mechanism and the second conversion mechanism. The changing unit includes: a first electromagnetic clutch that transmits the rotational driving force of the electric motor to the first conversion mechanism or interrupts the rotational driving force; and a second electromagnetic clutch that transmits the rotational driving force to the second conversion mechanism or interrupts the rotational driving force.Type: ApplicationFiled: August 31, 2010Publication date: June 14, 2012Applicant: JTEKT CORPORATIONInventors: Yasuhiro Yukitake, Akiyoshi Tashiro, Hiroki Kagawa, Takafumi Uemoto