Patents by Inventor Yoshiaki Fujita

Yoshiaki Fujita 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: 20050279588
    Abstract: A device, which is provided at a car, for guiding the car along guide rails, the device comprises, a non-contact type of actuator configured to generate a magnetic force which keeps the actuator away from surfaces of a rail by predetermined distances, a unit configured to detect a distance between the rail and the car, a unit configured to determine an amount of displacement of the rail which is caused by a load which generates at time of guiding, based on a value of the magnetic force and the distance, a unit configured to acquire position information regarding the car, a unit configured to calculate an amount of a warp occurring at time of setting the rail, which corresponds to the information, and a unit configured to control the magnetic force based on a total value of the determined amount of the displacement and the amount of the warp.
    Type: Application
    Filed: August 24, 2005
    Publication date: December 22, 2005
    Inventor: Yoshiaki Fujita
  • Patent number: 6937113
    Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: August 30, 2005
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
  • Publication number: 20050167207
    Abstract: There is provided a double-deck elevator which does not cause any impacts or vibrations on each cage when adjusting the spacing in the vertical direction between upper and lower cages. Loads on an upper support beam from right and left support arms for hoisting and supporting the upper cage are measured by right and left upper measuring units. Similarly, loads on a lower support beam from right and left support arms for hoisting and supporting the lower cage are measured by right and left lower measuring units. Because the magnitude of the loads on the right and left screw shafts can be obtained correctly, any impacts or vibrations caused on each cage can be prevented when adjusting the spacing in the vertical direction by correctly controlling the drive torque output from right and left drive motors.
    Type: Application
    Filed: March 18, 2003
    Publication date: August 4, 2005
    Inventors: Yoshiaki Fujita, Naoki Kondo
  • Patent number: 6911878
    Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: June 28, 2005
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
  • Publication number: 20050134407
    Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.
    Type: Application
    Filed: November 9, 2004
    Publication date: June 23, 2005
    Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
  • Publication number: 20050122187
    Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.
    Type: Application
    Filed: January 11, 2005
    Publication date: June 9, 2005
    Applicant: Oki Electric Industry Co., Ltd.
    Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
  • Patent number: 6902040
    Abstract: An exit (5) formed in an elevator car (1) is closed by doors (8) of multi-construction including an inner door (6) and an outer door (7). Air is able to flow between a space between the inner door (6) and the outer door (7) and the space in the elevator car (1). The elevator car (1) can be sealed in an airtight state and can be isolated from external noise. Deformation of the decorative inner surface of the inner door (6) by pressure difference between the interior and the exterior of the elevator car (1) can be prevented.
    Type: Grant
    Filed: November 22, 2001
    Date of Patent: June 7, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki Fujita, Katsuyoshi Uchibori
  • Publication number: 20050104203
    Abstract: A filter chip lying on an upper surface of a top layer package substrate is connected to an upper surface ground electrode (235). The upper ground electrode (235) and a lower surface ground electrode (237) are connected to each other via through electrodes (261, 262, 263), ground wiring patterns (251, 252), first connecting lines (271 to 276), and second connecting lines (281, 282). The first connecting lines (271 to 276) are connected to the ground wiring patterns (251, 252), whereas the second connecting lines (281, 282) are not connected to the ground wiring patterns (251, 252), respectively. Owing to the provision of the connecting lines connected to the ground wiring patterns (251, 252) and the connecting lines unconnected to the ground wiring patterns (251, 252), the impedance between a multilayer package substrate and ground can be adjusted.
    Type: Application
    Filed: July 8, 2004
    Publication date: May 19, 2005
    Applicant: Oki Electric Industry Co., Ltd.
    Inventors: Akio Hirakawa, Yoshiaki Fujita, Tomokazu Komazaki
  • Patent number: 6870440
    Abstract: A surface acoustic wave duplexer having an antenna terminal, a transmitting terminal and a receiving terminal. The surface acoustic wave duplexer includes a transmitting SAW filter coupled between the antenna terminal and the transmitting terminal, a receiving SAW filter coupled between the antenna terminal and the receiving terminal, a common piezoelectric substrate on which both of the transmitting SAW filter and the receiving SAW filter are formed, a package covering the common piezoelectric substrate. The antenna terminal, the transmitting terminal and the receiving terminal are formed on the package, and a frequency adjusting circuit is coupled between the antenna terminal and the transmitting SAW filter or the receiving SAW filter. The frequency adjusting circuit has a capacitance element.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: March 22, 2005
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Tomokazu Komazaki, Yoshiaki Fujita, Hajime Shimamura
  • Publication number: 20040238287
    Abstract: A double deck elevator comprises a winding machine which lifts up/down a cage frame loaded with two cages in a vertical direction, a cage driving unit which changes a relative distance between upper and lower cages, and a cage position controller which starts an inter-cage distance adjustment operation of the cage driving unit almost at the same time when the winding machine is shifted from an acceleration operation to a constant velocity operation, and changes an operating velocity of the inter-cage distance adjustment operation corresponding to a destination floor almost at the same time when the winding machine changes from the constant velocity operation to a deceleration operation after the destination floor is determined, whereby completing the inter-cage distance adjustment operation almost at the same time when the winding machine stops.
    Type: Application
    Filed: December 10, 2003
    Publication date: December 2, 2004
    Inventors: Yoshiaki Fujita, Masakatsu Okamoto
  • Publication number: 20040222048
    Abstract: An elevator system comprises an air supply fan and an air exhaust fan which changes atmospheric pressure in a car according to an ascending and descending process, and a controller which rotates the air supply fan and the air exhaust fan in a normal direction or a reverse direction according to the ascending and descending process to pressurize or depressurize an inside of the car.
    Type: Application
    Filed: February 17, 2004
    Publication date: November 11, 2004
    Inventors: Sueyoshi Mizuno, Yoshiaki Fujita, Norihito Togashi
  • Publication number: 20040206582
    Abstract: An elevator door unit comprises cage doors, a cage door lock unit, hall doors, and a lock release unit. The cage doors are provided in a cage which moves in a shaft. The cage door lock unit limits and locks the opening width of the cage doors to the width not to permit passing of passengers. The hall doors are provided in a landing hall, and opened interlocking with the cage doors, when the cage stops in a range of facing to the cage doors. The lock release unit releases the cage door lock unit within the opening width by opening the cage doors by manual operation, when the cage stops in a range that the cage doors face to the hall doors.
    Type: Application
    Filed: February 11, 2004
    Publication date: October 21, 2004
    Inventors: Kenzo Tonoki, Yoshiaki Fujita, Shin Murakami, Norihito Togashi
  • Publication number: 20040050628
    Abstract: An exit (5) formed in an elevator car (1) is closed by doors (8) of multi-construction including an inner door (6) and an outer door (7). Air is able to flow between a space between the inner door (6) and the outer door (7) and the space in the elevator car (1). The elevator car (1) can be sealed in an airtight state and can be isolated from external noise. Deformation of the decorative inner surface of the inner door (6) by pressure difference between the interior and the exterior of the elevator car (1) can be prevented.
    Type: Application
    Filed: May 23, 2003
    Publication date: March 18, 2004
    Inventors: Yoshiaki Fujita, Katsuyoshi Uchibori
  • Patent number: 6677835
    Abstract: A polar SAW (Surface Acoustic Wave) filter includes a band-pass ladder type SAW filter having a SAW resonator. A two-terminal pair circuit is serially connected to the band-pass ladder type SAW filter and includes a plurality of inductors. The polar SAW filter has attenuation poles in each of the higher-frequency and lower-frequency attenuation ranges of a pass band.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: January 13, 2004
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Kazushige Noguchi, Satoshi Terada, Tomokazu Komazaki, Yoshikazu Kihara, Yoshiaki Fujita
  • Patent number: 6640935
    Abstract: An elevator including a cage for accommodating passengers configured to move up and down in a shaft along a guide rail, a support base attached to a lower portion of the cage, a plurality of car sheaves rotatably secured to the support base through respective axles, a cable placed around the car sheaves and configured to suspend the cage, and at least one damper coupled to the cage and configured to attenuate vibration transferred from the cable to the cage.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: November 4, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shin Murakami, Shigeo Nakagaki, Yoshiaki Fujita
  • Publication number: 20030117233
    Abstract: A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.
    Type: Application
    Filed: October 21, 2002
    Publication date: June 26, 2003
    Inventors: Kenichi Anasako, Yoshiaki Fujita, Hisanori Ehara, Tomokazu Komazaki
  • Patent number: 6488124
    Abstract: In an elevator, a driving unit is installed at the top of an elevator shaft above a counterweight. Traction sheaves engage with ropes and are rotated by the driving device. These traction sheaves are positioned close to wall surfaces of the elevator shaft, that are adjacent to its wall surface facing the counterweight. The traction sheaves are also positioned outside the horizontally projected plane of a car.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: December 3, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kunio Yasuda, Yoshiaki Fujita, Kosei Kamimura, Ikuo Asami, Yasuyuki Wagatsuma, Kiyoshi Kobayashi, Tadashi Munakata, Shin Murakami, Yoshinobu Ishikawa, Takeshi Miyata, Mitsuo Hayase
  • Patent number: 6489861
    Abstract: An antenna duplexer has a first filter and a second filter coupled to respective signal terminals and to a common node. The common node is coupled to an antenna terminal. The first filter has a higher-frequency passband than the second filter. A transmission-line circuit, inserted between the first filter and the common node, increases the impedance of the first filter in its lower stopband. The transmission-line circuit includes an internal node, a first transmission line coupling the internal node to the common node, a second transmission line coupling the internal node to the first filter, and a grounding circuit such as a capacitor coupling the internal node to ground. The grounding circuit further enhances the lower stopband impedance of the first filter.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: December 3, 2002
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Kazushige Noguchi, Satoshi Terada, Yoshiaki Fujita, Tomokazu Komazaki, Akira Mashimo
  • Publication number: 20020171507
    Abstract: A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.
    Type: Application
    Filed: April 3, 2002
    Publication date: November 21, 2002
    Inventors: Wataru Ohashi, Hajime Shimamura, Tomokazu Komazaki, Yoshiaki Fujita
  • Publication number: 20020089396
    Abstract: A polar SAW (Surface Acoustic Wave) filter includes a band-pass ladder type SAW filter having a SAW resonator. A two-terminal pair circuit is serially connected to the band-pass ladder type SAW filter and includes a plurality of inductors. The polar SAW filter has attenuation poles in each of the higher-frequency and lower-frequency attenuation ranges of a pass band.
    Type: Application
    Filed: November 16, 2001
    Publication date: July 11, 2002
    Inventors: Kazushige Noguchi, Satoshi Terada, Tomokazu Komazaki, Yoshikazu Kihara, Yoshiaki Fujita