Patents by Inventor Masaei Sato

Masaei Sato 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: 7568310
    Abstract: An opening/closing system for vehicle can improve detection accuracy of rotation of an output member and enhance reliability of its operation. The opening/closing system for vehicle includes a drive unit having an electric motor and a reduction gear unit. A drum, which is an output member, is fixed to the output shaft of the drive unit through a power transmittable member. A magnet fixed to the outer periphery of a disk member is disposed between the drum and the gear case of the reduction gear unit in such a way that the magnet rotates along with the drum when the disk member is fixed to the power transmittable member. A housing case fixed to the gear case is provided with a sensor accommodating section that accommodates a magnetic sensor. The magnetic sensor is disposed to detect the rotation of the drum from a change in a magnetic field created by the magnet.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: August 4, 2009
    Assignee: Mitsuba Corporation
    Inventors: Masaei Sato, Toru Takahashi, Yoshitaka Sekine, Kousi Miura
  • Patent number: 7328934
    Abstract: There is provided a sliding door opening and closing device that improves layout flexibility of a driving unit in a self-propelled sliding door opening and closing device in which the driving unit is disposed on a sliding door side and that can protect a cable member without adding a component such as a decorative sheet. A lower rail is fixed to the vehicle body, and a lower arm guided along the lower rail is fixed to the sliding door. A driving unit for driving the sliding door for opening and closing has a drum driven by an electric motor for rotation. A cable is wound around the drum, wherein one end of the cable is fixed to the vehicle body on a vehicle-front side of the lower rail and the other end thereof is fixed to the vehicle body on a vehicle-rear side of the lower rail. This driving unit is incorporated inside the lower arm so as to be integrally formed with the lower arm.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: February 12, 2008
    Assignee: Mitsuba Corporation
    Inventor: Masaei Sato
  • Publication number: 20060284447
    Abstract: There is provided a sliding door opening and closing device that improves layout flexibility of a driving unit in a self-propelled sliding door opening and closing device in which the driving unit is disposed on a sliding door side and that can protect a cable member without adding a component such as a decorative sheet. A lower rail is fixed to the vehicle body, and a lower arm guided along the lower rail is fixed to the sliding door. A driving unit for driving the sliding door for opening and closing has a drum driven by an electric motor for rotation. A cable is wound around the drum, wherein one end of the cable is fixed to the vehicle body on a vehicle-front side of the lower rail and the other end thereof is fixed to the vehicle body on a vehicle-rear side of the lower rail. This driving unit is incorporated inside the lower arm so as to be integrally formed with the lower arm.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 21, 2006
    Applicant: MITSUBA Corporation
    Inventor: Masaei Sato
  • Publication number: 20050055883
    Abstract: An opening/closing system for vehicle can improve detection accuracy of rotation of an output member and enhance reliability of its operation. The opening/closing system for vehicle includes a drive unit having an electric motor and a reduction gear unit. A drum, which is an output member, is fixed to the output shaft of the drive unit through a power transmittable member. A magnet fixed to the outer periphery of a disk member is disposed between the drum and the gear case of the reduction gear unit in such a way that the magnet rotates along with the drum when the disk member is fixed to the power transmittable member. A housing case fixed to the gear case is provided with a sensor accommodating section that accommodates a magnetic sensor. The magnetic sensor is disposed to detect the rotation of the drum from a change in a magnetic field created by the magnet.
    Type: Application
    Filed: September 9, 2004
    Publication date: March 17, 2005
    Applicant: MITSUBA Corporation
    Inventors: Masaei Sato, Toru Takahashi, Yoshitaka Sekine, Kousi Miura
  • Patent number: 6009671
    Abstract: In a system for automatically opening or closing a sliding door or the like for a vehicle, an undesired clamping of an object between the door and the vehicle body, resulting in increased tension force in the wire moving the door, is sent early and relieved quickly. The wire (4) is solidly secured to the sliding door and wound onto a drum (10) to open or close the door by a motor driving the drum, and two tensioners (11a and 11b) are provided respectively on opposite sides of the drum and between the drum and door. Each sensor has a movable part (19) positioned in accordance with the tension force in the wire passing through the tensioner, sensor plates (20) are provided on the movable parts of the tensioners, and magnetic sensors (21) are provided to detect the moving speeds of the plates.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: January 4, 2000
    Assignees: Mitsuba Corporation, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Satoru Sasaki, Masaei Sato, Takayuki Kusaka
  • Patent number: 5929544
    Abstract: A drain structure for a fan motor prevents water from entering a discharge hole in the casing of the fan motor. A guiding passage is in opposed relation to the discharge hole and includes a front end portion covered by a fan boss section and an outer rib to prevent water from entering through the discharge hole into the casing. The guiding passage receives water discharged from the discharge hole. The discharge hole is formed in a lower portion of a casing cylindrical section. The casing cylindrical section is mounted on a fitting bracket for securement to a radiator.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: July 27, 1999
    Assignee: Mitsuba Corporation
    Inventors: Hirohiko Maekawa, Masaei Sato
  • Patent number: 5187492
    Abstract: The first structural aspect for mounting a telescopic antenna for an automobile includes a nut surrounding the top end portion of a spacer pipe and engaging with a threaded portion cut on the outside of the top end portion of a base pipe; a flange and a collar provided on a conducting pipe and the spacer pipe respectively and clamped between a contact portion provided on the nut and the top rim of the base pipe; and a flat ring positioned between the flange and the collar. The second structural aspect for mounting a telescopic antenna for an automobile includes resilient protrusions defined on the spacer pipe; holes defined on the conducting pipe, for engaging with the resilient protrusions when the spacer pipe is inserted in the conducting pipe so that the spacer pipe can be kept in position; and a portion around the resilient protrusions having an inside diameter greater than that of the spacer pipe. Both aspects help secure easy sliding of the antenna rods.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: February 16, 1993
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventor: Masaei Sato
  • Patent number: 5146799
    Abstract: As the first aspect of the invention, an actuator in a power antenna device includes a worm provided on a shaft of the motor; a first gear unit integrally including a worm wheel and a small intermediate gear; a second gear unit integrally including a large internal gear and a part of a clutch device; reduction gears including first reducing gears (a pair of the worm gear and the worm wheel) and second reducing gears (a pair of the small intermediate gear and the large internal gear); and a support board made of a hard material such as metal and integrally fixed to a casing for the actuator, and which rotatably supports the first and second gear units on the side where the small intermediate gear and the large internal gear engage.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: September 15, 1992
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventors: Masaei Sato, Yukiteru Hosoya
  • Patent number: 5022815
    Abstract: The invention concerns a structure for mounting a fan to a fan motor. The structure is designed to fit a plurality of thrust washers onto the end of a motor shaft supported in a casing through a bearing and to thrust and fit a flat washer on a peripheral surface of a smaller diameter step formed on the tip side further than the washers-fitted section. Of these thrust washers, the most outer, tip side, thrust washer located opposite to the flat washer is thicker than the traveling play distance toward the core of a motor shaft and thinner than the interval from the adjacent thrust washer to the peripheral surface of the step. With the construction, hence, the invention serves to prevent the thrust washer from falling onto the smaller diameter step.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: June 11, 1991
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventor: Masaei Sato
  • Patent number: 4855631
    Abstract: The brush holding device includes a brush box formed into a tubular shape, having opposite open ends, and being slidably provided in a hollow portion thereof with a brush. A cap is capped onto one end portion of the brush box to block the end portion, and for receiving a reaction force of a brush spring to bring the brush into sliding contact with a commutator. A projecting portion is provided on the cap to engage a portion of the brush box, so that side walls of the brush box can be prevented from deflecting inwardly. A frame portion of the cap may be coupled onto the outer periphery of the rear end portion of the brush box.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: August 8, 1989
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventors: Masaei Sato, Yukiteru Hosoya