Patents Assigned to TBK Co., Ltd.
  • Publication number: 20200332805
    Abstract: A water pump (1) according to the present invention comprises an electromagnetic clutch (60) that switches between a transmission state where a pump pulley (20) and an armature (83) of an armature assy (80) are made to frictionally engage to transmit drive force of the pump pulley (20) to a pump shaft (30) and a cutoff state where frictional engagement of the pump pulley (20) and the armature (83) of the armature assy (80) is released to cut off transmission of drive force from the pump pulley (20) to the pump shaft (30), and a flange member (120) provided on the armature assy (80) to rotate integrally with the pump shaft (30) and is configured such that when in the cutoff state, by magnetic attractive force between a permanent magnet (111) of the pump pulley (20) and a permanent magnet (131) of the flange member (120), the flange member (120) is rotated together with the rotation of the pump pulley (20).
    Type: Application
    Filed: April 17, 2017
    Publication date: October 22, 2020
    Applicant: TBK Co., Ltd.
    Inventors: Mitsuo NAKAJIMA, Makoto OHSAWA
  • Publication number: 20200277953
    Abstract: A gear pump comprises an internal gear (10), a first external gear (20) and a second external gear (30), a case member (50) having a one end side accommodation portion (52) for retaining these gears (10,20,30), an other end side accommodation portion (53) at other end side and a partition wall portion (54) therebetween, a cover member (70) and a plate member (80). A pump chamber (P) defined inside the internal gear (10) is divided into a first pump chamber (P1) which has a first intake-discharge space (L1) and a first discharge-intake space (H1), and a second pump chamber (P2) which has a second intake-discharge space (L2) and a second discharge-intake space (H2). The plate member has a first communication path (81) and a second communication path (82) between the plate member (80) and the cover member (70). The one side communication passage (57) is communicated with the first communication path (81). Two penetrating holes (82b,82c) are formed on the plate member (80).
    Type: Application
    Filed: October 5, 2017
    Publication date: September 3, 2020
    Applicant: TBK Co., Ltd.
    Inventor: Yoshiyuki TERADA
  • Patent number: 10724518
    Abstract: A gear pump according to the present invention is configured such that a first pump chamber comprises a first intake space into which a fluid is taken in and a first discharge space from which the fluid is discharged, in accordance with rotation of an internal gear and external gears, a second pump chamber comprises a second intake space into which the fluid is taken in and a second discharge space from which the fluid is discharged, in accordance with rotation of the internal gear and the external gears, the first intake space and the second intake space are provided to be symmetrical about a rotational center of the internal gear, and the first discharge space and the second discharge space are provided to be symmetrical about the rotational center of the internal gear.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: July 28, 2020
    Assignee: TBK CO., LTD.
    Inventors: Makoto Araki, Hirotada Yoshitani
  • Publication number: 20190316578
    Abstract: An electric pump device (1) according to the present invention comprises an oil pump (10) that discharges oil; a motor (20) that drives the oil pump (10); and a control unit (30) that controls the value of current supplied to the motor (20) to control rotation of the motor (20), thereby controlling the flow rate of fluid discharged from the oil pump (10). The device is configured such that at startup of the motor (20), until the rotational speed of the motor (20) comes near to a target rotational speed set beforehand, the motor (20) is driven by open loop control that restricts the value of current supplied to the motor (20) to lower than a predetermined upper limit, and that when the rotational speed of the motor (20) has come near to the target rotational speed, the motor (20) is driven by feedback control that keeps the rotational speed at a steady rotational speed.
    Type: Application
    Filed: November 14, 2016
    Publication date: October 17, 2019
    Applicant: TBK Co., Ltd.
    Inventors: Makoto ARAKI, Yoshitaka KURAYA
  • Patent number: 10393140
    Abstract: The fluid pump according to the present invention has water storage means that is formed so as to communicate with a shaft hole in a pump case and stores fluid leaking from a mechanical seal. An electromagnetic clutch establishes or blocks the transmission of power to a drive shaft by switching between supply and non-supply of electricity to an excitation coil. The water storage means has a weep chamber that communicates with the shaft hole between the mechanical seal and a bearing and is opened to an end portion in the axial direction. An attachment member for attaching a core of the electromagnetic clutch to the pump case seals the opening of the weep chamber.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: August 27, 2019
    Assignee: TBK CO., LTD.
    Inventor: Makoto Osawa
  • Publication number: 20180209416
    Abstract: A gear pump according to the present invention is configured such that a first pump chamber comprises a first intake space into which a fluid is taken in and a first discharge space from which the fluid is discharged, in accordance with rotation of an internal gear and external gears, a second pump chamber comprises a second intake space into which the fluid is taken in and a second discharge space from which the fluid is discharged, in accordance with rotation of the internal gear and the external gears, the first intake space and the second intake space are provided to be symmetrical about a rotational center of the internal gear, and the first discharge space and the second discharge space are provided to be symmetrical about the rotational center of the internal gear.
    Type: Application
    Filed: May 18, 2015
    Publication date: July 26, 2018
    Applicant: TBK Co., Ltd.
    Inventors: Makoto Araki, Hirotada Yoshitani
  • Patent number: 10012227
    Abstract: An engine cooling device includes a first supply pump driven by an engine, a second supply pump driven by an electric motor, a first fluid path switching valve, a temperature detector, a revolution speed detector that detects the revolution speed of the engine, and a controller that controls the actuation of the electric motor and the fluid path switching valve. When the temperature of the engine detected by the temperature detector (engine cooling water temperature) is less than a first predetermined temperature, the controller performs control to restrict the supply of the cooling fluid from the first supply pump to the engine by switching the fluid path switching valve to a restricted state, and to supply the cooling fluid from the second supply pump to the engine by performing control to drive the electric motor.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: July 3, 2018
    Assignee: TBK CO., LTD.
    Inventors: Hirotada Yoshitani, Takeshi Hoji
  • Patent number: 9777828
    Abstract: An oil supply device comprises a main pump driven by an engine and capable of supplying oil to an automatic transmission and to a hydraulic control valve, an electric motor, a subsidiary pump driven by the electric motor that raises the pressure of a portion of the oil discharged from the main pump and supplies the oil to the hydraulic control valve, and a motor controller which controls driving of the electric motor on the basis of the pressure of the oil supplied to the automatic transmission. The motor controller implements control to drive the subsidiary pump by the electric motor to raise the pressure of a portion of the oil discharged from the main pump to a prescribed pressure or above and supply the oil to the hydraulic control valve when the pressure of the oil supplied to the automatic transmission is less than the prescribed pressure.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: October 3, 2017
    Assignee: TBK CO., LTD.
    Inventors: Hirotada Yoshitani, Yoshiyuki Terada
  • Publication number: 20170268526
    Abstract: An impeller (100) for a fluid pump according to the present invention comprises a shroud (150) that has a disk shape and is drivingly rotated about a center axis, and a cover (110) comprising a cover main body (120) having a truncated cone shape with an inlet port (123) for a fluid formed at a center and a plurality of blades (130) arranged around a center axis of the cover main body (120). The cover (110) and the shroud (150) are joined to each other with a welding contacting portion (135) and a welding contacted portion (177) welded to each other in a center axis direction, in a state where another end surface of the shroud (150) and a distal end portion (131) of the blades (130) are in parallel with each other.
    Type: Application
    Filed: August 28, 2014
    Publication date: September 21, 2017
    Applicant: TBK Co., Ltd.
    Inventors: Jea woong Seok, Satoshi Nagao, Makoto Osawa
  • Patent number: 9742343
    Abstract: An electric oil pump constructed by integrally combining an electric motor with an oil pump, wherein the electric motor is composed of a motor casing, a drive shaft that is disposed in a motor housing chamber formed inside the motor casing and is rotatably supported, a rotor that is disposed on the drive shaft, and a stator that is located inside the motor housing chamber and is attached to the motor casing. The electric oil pump is equipped with an internal controller that controls application of electric power to the stator so as to cause the drive shaft to be driven to rotate via the rotor.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: August 22, 2017
    Assignee: TBK CO., LTD.
    Inventors: Kazuaki Okamoto, Hirotada Yoshitani
  • Publication number: 20170108002
    Abstract: The fluid pump according to the present invention has water storage means that is formed so as to communicate with a shaft hole in a pump case and stores fluid leaking from a mechanical seal. An electromagnetic clutch establishes or blocks the transmission of power to a drive shaft by switching between supply and non-supply of electricity to an excitation coil. The water storage means has a weep chamber that communicates with the shaft hole between the mechanical seal and a bearing and is opened to an end portion in the axial direction. An attachment member for attaching a core of the electromagnetic clutch to the pump case seals the opening of the weep chamber.
    Type: Application
    Filed: February 17, 2016
    Publication date: April 20, 2017
    Applicant: TBK Co., Ltd.
    Inventor: Makoto Osawa
  • Patent number: 9579982
    Abstract: A resonant motor system having a resonant circuit that includes magnetic coils and of capacitors, for generating an electric power when the resonant lot is rotated by an engine, a regenerating portion for the resonant motor, a motor driving portion, a motor control portion, and a capacitor portion for storing therein the electric power generated by the resonant motor when the resonant motor is regenerated, the resonant rotor being driven by the electric power stored in the capacitor portion when the engine is assisted by the resonant motor.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: February 28, 2017
    Assignee: TBK CO., LTD.
    Inventors: Yukihiro Kato, Akihiro Miyoshi, Mitsuyoshi Oba
  • Publication number: 20160233814
    Abstract: An electric oil pump constructed by integrally combining an electric motor with an oil pump, wherein the electric motor is composed of a motor casing, a drive shaft that is disposed in a motor housing chamber formed inside the motor casing and is rotatably supported, a rotor that is disposed on the drive shaft, and a stator that is located inside the motor housing chamber and is attached to the motor casing. The electric oil pump is equipped with an internal controller that controls application of electric power to the stator so as to cause the drive shaft to be driven to rotate via the rotor.
    Type: Application
    Filed: October 4, 2013
    Publication date: August 11, 2016
    Applicant: TBK Co., Ltd.
    Inventors: Kazuaki Okamoto, Hirotada Yoshitani
  • Publication number: 20160230826
    Abstract: In the brake device (1) according to the present invention, a brake shaft (20) that configures a pad pressing device (10) for pressing brake pads (4, 5) against rotor surfaces (2L, 2R) is supported on an inner surface of a brake housing (6) by a cylindrical shaft support member (25) and is turned in a brake actuation direction and a brake release direction along a surface of the shaft support member (25). The shaft support member (25) is provided in such a manner that a portion of the surface thereof is inserted into a support concavity (19) that is formed on the inner surface of the brake housing (6). The coefficient of friction of the surface of the support concavity (19) is greater than the coefficient of friction of the surface of the shaft support member (25).
    Type: Application
    Filed: September 19, 2013
    Publication date: August 11, 2016
    Applicant: TBK Co., Ltd.
    Inventors: Makoto Osawa, Hirotada Yoshitani
  • Patent number: 9353744
    Abstract: A vane pump (1) includes: a front side vane case (40), a rear side vane case (50), a pump housing (60), a pump cover (70), a drive shaft (30), a rotationally driven rotor (10), and vanes (20) provided in slot sections (13), wherein engaging groove sections and guide protrusions (46, 52), which engaging one another, are provided in the vanes (20), the front side vane case (40) and the rear side vane case (50), the engaging groove sections and guide protrusions (46, 52) are composed in such a manner that the vanes (20) move following a proximal inner peripheral surface (42b) in a state where the vane is proximate to the proximal inner peripheral surface (42b), in accordance with rotation of the rotor (10), and pump chambers are demarcated by the vanes (20) situated in proximity with the proximal inner peripheral surface (42b).
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: May 31, 2016
    Assignee: TBK Co., Ltd.
    Inventor: Yuta Kobayashi
  • Publication number: 20160076531
    Abstract: An engine cooling device includes a first supply pump driven by an engine, a second supply pump driven by an electric motor, a first fluid path switching valve, a temperature detector, a revolution speed detector that detects the revolution speed of the engine, and a controller that controls the actuation of the electric motor and the fluid path switching valve. When the temperature of the engine detected by the temperature detector (engine cooling water temperature) is less than a first predetermined temperature, the controller performs control to restrict the supply of the cooling fluid from the first supply pump to the engine by switching the fluid path switching valve to a restricted state, and to supply the cooling fluid from the second supply pump to the engine by performing control to drive the electric motor.
    Type: Application
    Filed: April 23, 2013
    Publication date: March 17, 2016
    Applicant: TBK CO., LTD.
    Inventors: Hirotada Yoshitani, Takeshi Hoji
  • Patent number: 9188031
    Abstract: An engine lubricating oil supply device (1) according to the present invention is configured such that a connection hole (45) is opened and closed by a ball valve element (53) based on a balance between a biasing force of a shape memory spring (51) which changes in accordance with the temperature of the lubricating oil and a hydraulic pressure of the lubricating oil flowing into a piston chamber (31) such that the lubricating oil flowing into an accommodating space (44) from the connection hole (45) is drained via a second drain oil passage (46), thereby adjusting the degree of opening of a first drain oil passage (34) by causing a piston (35) to slide on the basis of a balance between a biasing force of a valve spring (39) and a pressure differential between an upstream chamber (32) and a downstream chamber (33) which is generated in accordance with a flow of the lubricating oil passing through an orifice (38).
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: November 17, 2015
    Assignee: TBK Co., Ltd.
    Inventors: Takeshi Hoji, Mitsuo Nakajima
  • Publication number: 20150316144
    Abstract: An oil supply device comprises a main pump driven by an engine and capable of supplying oil to an automatic transmission and to a hydraulic control valve, an electric motor, a subsidiary pump driven by the electric motor that raises the pressure of a portion of the oil discharged from the main pump and supplies the oil to the hydraulic control valve, and a motor controller which controls driving of the electric motor on the basis of the pressure of the oil supplied to the automatic transmission. The motor controller implements control to drive the subsidiary pump by the electric motor to raise the pressure of a portion of the oil discharged from the main pump to a prescribed pressure or above and supply the oil to the hydraulic control valve when the pressure of the oil supplied to the automatic transmission is less than the prescribed pressure.
    Type: Application
    Filed: December 17, 2012
    Publication date: November 5, 2015
    Applicant: TBK CO., LTD.
    Inventors: Hirotada Yoshitani, Yoshiyuki Terada
  • Publication number: 20150184707
    Abstract: A disk brake device has a rotor, a carrier, a caliper, an inner pad, and a braking operation mechanism. The braking operation mechanism includes a base plate, a wedge plate, and a slide member movement mechanism which moves the wedge plate in a direction perpendicular to a braking surface while moving the wedge plate to slide in a rotating direction of the rotor. The carrier includes an inner-side rotating-direction movement restricting portion which faces the base plate in the rotating direction of the rotor and abuts against the base plate in the rotating direction of the rotor to restrict movement of the base plate in the rotating direction. The base plate is held by the caliper to be movable in the direction perpendicular to the braking surface with movement of the base plate in the rotating direction of the rotor kept restricted by the inner-side rotating-direction movement restricting portion.
    Type: Application
    Filed: July 5, 2012
    Publication date: July 2, 2015
    Applicant: TBK CO., LTD.
    Inventor: Yoshihiro Yasuda
  • Publication number: 20150159712
    Abstract: A disk brake device has a rotor, a carrier, a caliper, an inner pad, and a braking operation mechanism. The braking operation mechanism includes a base plate, a wedge plate, and a slide member movement mechanism which moves the wedge plate in the direction perpendicular to a braking surface while moving the wedge plate to slide in the rotating direction of the rotor. The carrier includes inner-side rotating-direction movement restricting portions which hold the base plate therebetween. The disk brake device further includes a pressing positioning member inserted into one of gaps between the inner-side rotating-direction movement restricting portions and both ends of the base member so as to be attached to the base member. The pressing positioning member presses the base plate in the direction away from the inner-side rotating-direction movement restricting portion to position the base plate relative to the carrier in the rotating direction.
    Type: Application
    Filed: July 5, 2012
    Publication date: June 11, 2015
    Applicant: TBK CO., LTD.
    Inventor: Yoshihiro Yasuda