Patents by Inventor Yoshitaka Ito

Yoshitaka Ito 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).

  • Publication number: 20040163456
    Abstract: A mounting structure for a transmitter of a tire condition monitoring apparatus that enables the transmitter to be attached to wheels having different cross sectional shapes. A wheel has a drop center and a rim formed integrally with the drop center at a predetermined angle relative to the drop center. The mounting structure includes a valve stem arranged on the rim and having a basal end. A casing houses the transmitter. A coupling fixture couples the casing and the valve stem. The coupling fixture includes a coupler coupled to the basal end of the valve stem, an anchor for anchoring the casing, and a connection for connecting the coupler and the anchor so that the coupling fixture is resilient. The angle between the coupler and the anchor is greater than a predetermined angle before the coupling fixture couples the casing and the valve stem.
    Type: Application
    Filed: November 12, 2003
    Publication date: August 26, 2004
    Applicant: PACIFIC INDUSTRIAL CO., LTD.
    Inventors: Setsuhiro Saheki, Yoshitaka Ito
  • Publication number: 20040155785
    Abstract: A pressure sensor has a diaphragm that is exposed to air in a tire of a vehicle. A transmitter wirelessly transmits data representing the air pressure of the tire. A casing accommodates the transmitter and the pressure sensor. A lid closes an opening of the casing. A metal body is provided on the lid. When the opening of the casing is closed with the lid, the diaphragm is covered with the metal body.
    Type: Application
    Filed: December 5, 2003
    Publication date: August 12, 2004
    Applicant: PACIFIC INDUSTRIAL CO., LTD.
    Inventors: Youichi Okubo, Kazunori Sawafuji, Yoshitaka Ito, Takashi Ibuka, Hiroshi Ota
  • Patent number: 6774775
    Abstract: A casing for a transmitter is attached to a wheel such that the transmitter is located inside a tire. The casing has an upper plate, a lower plate, a surrounding wall extending between the upper plate and the lower plate, and a pair of skirts. The surrounding wall includes a front surface and a pair of side surfaces. Each skirt is located at one of corners defined between the front surface and the side surfaces. Each skirt is curved such that the front surface and the corresponding side surface are smoothly connected. The skirts are inclined with respect to the lower plate at an angle in the range of 65 to 75 degrees. This sufficiently endures pressure applied by a tire when removing the tire from a wheel.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: August 10, 2004
    Assignee: Pacific Industrial Co., Ltd.
    Inventor: Yoshitaka Ito
  • Patent number: 6764182
    Abstract: The present invention provides a projector that stably displays high-contrast, bright images by improving light resistance and heat resistance of a polarizer. The projector includes: a light source device; an electro-optic device that modulates light emitted from the light source device; two polarizers that are disposed respectively on a light incoming side and a light outgoing side of the electro-optic device; and a projection optical system that projects light output from the electro-optic device. At least one of the two polarizers is a structural birefringent polarizing plate.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: July 20, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Yoshitaka Ito, Hidefumi Sakata
  • Publication number: 20040119949
    Abstract: To provide a compact projector in which a projection image is formed by using four kinds of color light so as to expandmagnify an expressible color gamut of the projection image and to achieve an excellent light utilization efficiency, a projector includes a light source, a color-separation optical system, a light-modulation optical system, and a color-synthesis optical system. The color-separation optical system produces four kinds of color light whose output directions are different from each other. The light-modulation optical system includes a first two-color-modulation electro-optical device to modulate any two of the four kinds of color light separated by the color-separation optical system and a second two-color-modulation electro-optical device to modulate the remaining two kinds of color light.
    Type: Application
    Filed: November 10, 2003
    Publication date: June 24, 2004
    Applicant: Seiko Epson Corporation
    Inventor: Yoshitaka Ito
  • Patent number: 6748507
    Abstract: A single-chip microcomputer comprising: a first bus having a central processing unit and a cache memory connected therewith; a second bus having a dynamic memory access control circuit and an external bus interface connected therewith; a break controller for connecting the first bus and the second bus selectively; a third bus having a peripheral module connected therewith and having a lower-speed bus cycle than the bus cycles of the first and second buses; and a bus state controller for effecting a data transfer and a synchronization between the second bus and the third bus. The single-chip microcomputer has the three divided internal buses to reduce the load capacity upon the signal transmission paths so that the signal transmission can be accomplished at a high speed. Moreover, the peripheral module required to have no operation speed is isolated so that the power dissipation can be reduced.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: June 8, 2004
    Assignees: Hitachi, Ltd., Hitachi ULSI Engineering Corp.
    Inventors: Shumpei Kawasaki, Yasushi Akao, Kouki Noguchi, Atsushi Hasegawa, Hiroshi Ohsuga, Keiichi Kurakazu, Kiyoshi Matsubara, Akio Hayakawa, Yoshitaka Ito
  • Patent number: 6739724
    Abstract: The invention provides an illumination optical system that reduces polarization dependency of a light separation characteristic of a 45 degree dichroic surface and improves the image quality of the projector based on the color separation/synthesis optical system using the 45 degree dichroic surface. In the illumination optical system, green light and blue plus red light can be separated by a color light direction change element, and the polarization direction thereof are adjusted by a polarization change element.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: May 25, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Yoshitaka Ito
  • Patent number: 6735683
    Abstract: A single-chip microcomputer comprising: a first bus having a central processing unit and a cache memory connected therewith; a second bus having a dynamic memory access control circuit and an external bus interface connected therewith; a break controller for connecting the first bus and the second bus selectively; a third bus having a peripheral module connected therewith and having a lower-speed bus cycle than the bus cycles of the first and second buses; and a bus state controller for effecting a data transfer and a synchronization between the second bus and the third bus. The single-chip microcomputer has the three divided internal buses to reduce the load capacity upon the signal transmission paths so that the signal transmission can be accomplished at a high speed. Moreover, the peripheral module required to have no operation speed is isolated so that the power dissipation can be reduced.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: May 11, 2004
    Assignees: Hitachi, Ltd., Hitachi ULSI Engineering Corp.
    Inventors: Shumpei Kawasaki, Yasushi Akao, Kouki Noguchi, Atsushi Hasegawa, Hiroshi Ohsuga, Keiichi Kurakazu, Kiyoshi Matsubara, Akio Hayakawa, Yoshitaka Ito
  • Patent number: 6729730
    Abstract: A projector is provided which can realize a bright projected image of high light utilization efficiency while combining a reflective-type liquid crystal device and an integrator optical system. The projector may include a light source lamp, a light beam dividing optical element, a polarization conversion element, a polarization selection element having a polarization selection surface, and an electro-optical device. When a plane of incidence including a normal line of the polarization selection surface and the central axis of an incident light is assumed, the direction parallel to the plane of incidence and perpendicularly intersecting the central axis is assumed to be the X-axis direction, and the direction perpendicularly intersecting the plane of incidence is assumed to be the Y-axis direction, the direction of polarization beam separation by the polarization conversion element is the X-axis direction.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: May 4, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Yoshitaka Ito
  • Publication number: 20040069591
    Abstract: A chassis divided by partitions into compartments arranged in a vertical column and containing a banknote dispensing unit, a banknote receiving unit, a token dispensing unit, and a control unit operatively connected to detect receipt of one or more banknotes, dispense zero or more tokens, and dispense zero or more banknotes. The banknote receiving guide for the banknote receiving unit, the token dispensing guide for the token dispensing unit, and the banknote dispensing guide for the banknote dispensing unit are arranged to be easily accessible to a user seated at a gaming machine adjacent to the token dispenser.
    Type: Application
    Filed: August 25, 2003
    Publication date: April 15, 2004
    Inventor: Yoshitaka Ito
  • Patent number: 6695482
    Abstract: A half bearing constituting a cylindrical plain bearing for supporting a shaft for rotation when two of the half bearings are combined together. The half bearing has two circumferential ends each of which has a plurality of circumferential grooves without formation of any crush relief surface. The grooves extend substantially over an overall circumferential dimension of the half bearing and include portions located at both circumferential ends of the half bearing respectively. Each portion has a larger axially sectional area than the grooves formed in a portion of the half bearing mainly subjected to load during rotation of the shaft.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: February 24, 2004
    Assignee: Daido Metal Company Ltd.
    Inventors: Masayuki Niwa, Yoshitaka Ito, Mitsuru Sugita, Akira Ono, Susumu Mamiya, Masaaki Sakamoto
  • Publication number: 20040034454
    Abstract: A transmitter for a tire state monitoring apparatus that is easily connected to a wheel in an optimal manner. The transmitter includes a valve stem connected to a wheel to which the tire is attached. Electric components are mounted on a circuit board to detect the state of the tire. A casing accommodates the circuit board in the tire. The casing faces toward an outer circumferential surface of the wheel. A connecting portion connects the casing to the valve stem pivotally about a line perpendicular to the axial direction of the valve stem. A pressing mechanism presses the casing toward the outer circumferential surface of the wheel to restrict pivoting of the casing.
    Type: Application
    Filed: July 1, 2003
    Publication date: February 19, 2004
    Inventors: Yoshitaka Ito, Setsuhiro Saheki
  • Publication number: 20030233527
    Abstract: A single-chip microcomputer comprising: a first bus having a central processing unit and a cache memory connected therewith; a second bus having a dynamic memory access control circuit and an external bus interface connected therewith; a break controller for connecting the first bus and the second bus selectively; a third bus having a peripheral module connected therewith and having a lower-speed bus cycle than the bus cycles of the first and second buses; and a bus state controller for effecting a data transfer and a synchronization between the second bus and the third bus. The single-chip microcomputer has the three divided internal buses to reduce the load capacity upon the signal transmission paths so that the signal transmission can be accomplished at a high speed. Moreover, the peripheral module required to have no operation speed is isolated so that the power dissipation can be reduced.
    Type: Application
    Filed: October 4, 2002
    Publication date: December 18, 2003
    Inventors: Shumpei Kawasaki, Yasushi Akao, Kouki Noguchi, Atsushi Hasegawa, Hiroshi Ohsuga, Keiichi Kurakazu, Kiyoshi Matsubara, Akio Hayakawa, Yoshitaka Ito
  • Patent number: 6647772
    Abstract: A transmitter of a tire condition monitoring apparatus that has a superior moisture resistant characteristic, enables reduction in size, and facilitates manufacturing. The transmitter includes a casing formed from resin. An electric circuit unit is arranged in the casing to detect the condition of the tire and generate a signal corresponding to the condition of the tire. A battery is arranged in the casing to supply the electric circuit unit with power. The casing is insert molded to embed the electric circuit unit and the battery in the resin forming the casing.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: November 18, 2003
    Assignee: Pacific Industrial Co., Ltd.
    Inventors: Yoshitaka Ito, Setsuhiro Saheki, Youichi Okubo
  • Publication number: 20030210137
    Abstract: A casing for a transmitter is attached to a wheel such that the transmitter is located inside a tire. The casing has an upper plate, a lower plate, a surrounding wall extending between the upper plate and the lower plate, and a pair of skirts. The surrounding wall includes a front surface and a pair of side surfaces. Each skirt is located at one of corners defined between the front surface and the side surfaces. Each skirt is curved such that the front surface and the corresponding side surface are smoothly connected. The skirts are inclined with respect to the lower plate at an angle in the range of 65 to 75 degrees. This sufficiently endures pressure applied by a tire when removing the tire from a wheel.
    Type: Application
    Filed: November 27, 2002
    Publication date: November 13, 2003
    Inventor: Yoshitaka Ito
  • Publication number: 20030201883
    Abstract: A transmitter is attached to a wheel of a vehicle and transmits data indicating a condition of a tire of the vehicle. A mounting structure of the transmitter has a casing, a pin and a fastener cap. The casing accommodates the transmitter. The casing has a through hole. The pin is attached to the wheel and inserted into the through hole of the casing. The fastener cap is fastened to the pin such that the casing does not come off the pin.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 30, 2003
    Applicant: PACIFIC INDUSTRIAL CO., LTD.
    Inventors: Setsuhiro Saheki, Yoshitaka Ito
  • Publication number: 20030179345
    Abstract: The present invention provides a projector that stably displays high-contrast, bright images by improving light resistance and heat resistance of a polarizer. The projector includes: a light source device; an electro-optic device that modulates light emitted from the light source device; two polarizers that are disposed respectively on a light incoming side and a light outgoing side of the electro-optic device; and a projection optical system that projects light output from the electro-optic device. At least one of the two polarizers is a structural birefringent polarizing plate.
    Type: Application
    Filed: May 15, 2003
    Publication date: September 25, 2003
    Inventors: Yoshitaka Ito, Hidefumi Sakata
  • Patent number: 6601958
    Abstract: The distance between reflection surfaces of a light guide is set in such a manner as to gradually decrease toward an exit end surface from an incidence end surface. Thus, the equation SY/SX<MY/MX is satisfied, where SX designates the arrangement intervals of light source images in the direction along the X-axis, SY denotes the arrangement intervals of the light source images in the direction along the Y-axis, MX designates the length of the incidence end surface of the light guide in the direction along the X-axis, and MY denotes the length of the incidence end surface of the light guide in the direction along the Y-axis. Thus, the polarization separation performance of a polarization beam splitter disposed before the reflection type liquid crystal device can be maintained at a relatively high level. Consequently, a bright projection image having a high contrast ratio can be obtained.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: August 5, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Yoshitaka Ito
  • Patent number: 6592224
    Abstract: The present invention provides a projector that stably displays high-contrast, bright images by improving light resistance and heat resistance of a polarizer. The projector includes: a light source device; an electro-optic device that modulates light emitted from the light source device; two polarizers that are disposed respectively on a light incoming side and a light outgoing side of the electro-optic device; and a projection optical system that projects light output from the electro-optic device. At least one of the two polarizers is a structural birefringent polarizing plate.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: July 15, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Yoshitaka Ito, Hidefumi Sakata
  • Patent number: 6591294
    Abstract: A single-chip microcomputer comprising: a first bus having a central processing unit and a cache memory connected therewith; a second bus having a dynamic memory access control circuit and an external bus interface connected therewith; a break controller for connecting the first bus and the second bus selectively; a third bus having a peripheral module connected therewith and having a lower-speed bus cycle than the bus cycles of the first and second buses; and a bus state controller for effecting a data transfer and a synchronization between the second bus and the third bus. The single-chip microcomputer has the three divided internal buses to reduce the load capacity upon the signal transmission paths so that the signal transmission can be accomplished at a high speed. Moreover, the peripheral module required to have no operation speed is isolated so that the power dissipation can be reduced.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 8, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Shumpei Kawasaki, Yasushi Akao, Kouki Noguchi, Atsushi Hasegawa, Hiroshi Ohsuga, Keiichi Kurakazu, Kiyoshi Matsubara, Akio Hayakawa, Yoshitaka Ito