Patents by Inventor Koji Sakai

Koji Sakai 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: 20080126554
    Abstract: A communications device 1a is a primary station which communicates with a secondary station. The communications device includes a communications protocol analyzing section 160a and a protocol control section 110. The section 160a is capable of receiving both a first response to the first-connection-routine command and a second response to the second-connection-routine command. The first and second responses are distinguishable from each other. The section 160a determines by analyzing an incoming response whether the response is the first response or the second response. The section 110 connects to the secondary station using the first protocol if the communications protocol analyzing section 160a determines that the response is the first response and using the second protocol if the communications protocol analyzing section 160a determines that the response is the second response.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 29, 2008
    Inventors: Koji SAKAI, Hitoshi Naoe, Fumihiro Fukae, Takashi Nakajima, Kenji Mameda
  • Patent number: 7360360
    Abstract: A vehicle braking device includes a stroke simulator provided between a control piston of a fluid pressure booster and a brake operation member, wherein the control piston has an inner peripheral surface partially including a tapered surface with a decreasing diameter toward the front. The stroke simulator includes an input member housed in the control piston slidably in an axial direction backward of the tapered surface and connected to the brake operation member, and an elastic body interposed between the input member and the control piston and housed in the control piston. The elastic body has a cylindrical shape so as to be elastically deformed according to an action of an axial compressive force along with an advancing operation of the input member, and prevented from being deformed sequentially from the front by restraint with the tapered surface according to an increase in the axial compressive force.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: April 22, 2008
    Assignees: Nissin Kogyo Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Kazuhiro Tagata, Koji Sakai, Yasushi Aoki, Kenji Suzuki, Hiroshi Nakano
  • Patent number: 7359506
    Abstract: Inclined plane is provided at the tip of rotor cam. On the other hand, inclined planes are also provided in specific positions of stator cam. Because of this structure, in the specific positions, the inclined planes are in resilient contact with each other. Thus, the load is increased only in the specific positions without an increase in the load of spring. This structure can provide an opening and closing device capable of securely holding only desired positions without affecting the feel of opening and closing operation of the entire device, and electronic equipment using the device.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: April 15, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takehiko Konja, Yasuchika Kudo, Katsuichi Minami, Koji Sakai, Katsumasa Yamaguchi, Masayuki Miki, Naomasa Suzuki
  • Patent number: 7346377
    Abstract: To provide a folding mechanism capable of securely holding its opened and closed positions and an electronic apparatus employing the same. The folding mechanism is constructed by disposing outer circumferential fixed cam on the outer circumferential side and inner circumferential fixed cam on the inner circumferential side of a side surface of fixed member and, further, disposing outer circumferential movable cam on the outer circumferential side and inner circumferential movable cam on the inner circumferential side of a side face of movable member in confronting relation with the fixed cams.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: March 18, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Sakai, Masaki Nakase, Yasuchika Kudo, Takehiko Konja
  • Patent number: 7333518
    Abstract: A transmission method according to the present invention is capable of transmitting and receiving a data signal and information signal among a plurality of devices by full-duplex operation, wherein, when the information signal consecutively repeats a single pattern, a different pattern is inserted between the same patterns before transmission thereof. This minimizes an adverse effect of crosstalk jitter over a transmission line susceptible to crosstalk, and reduces a margin between the transition and sampling point of a signal, thereby suppressing the cost of a CDR circuit.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: February 19, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Sakai, Yuji Ichikawa, Masafumi Takahashi, Hitoshi Naoe
  • Publication number: 20080013963
    Abstract: The demodulation circuit of the present invention is a demodulation circuit, connected with a plurality of light-receiving sections each for receiving an optical signal and converting the signal into a binary pulse signal, operable to select and demodulate a pulse signal out of pulse signals that are supplied from the light-receiving sections, respectively, the demodulation circuit including: a judgment and selection section for detecting timing with which High level and Low level of each of the pulse signals are switched and for selecting at least one pulse signal based on the timing; and a demodulation section for demodulating the pulse signal selected by the judgment and selection section. Consequently, the demodulation circuit easily selects and demodulates a signal whose jitter component is small out of a plurality of supplied signals.
    Type: Application
    Filed: July 3, 2007
    Publication date: January 17, 2008
    Inventors: Hitoshi Naoe, Fumihiro Fukae, Koji Sakai, Shohei Ohsawa
  • Patent number: 7293413
    Abstract: There is provided a vehicle braking device in which a front outer periphery of a backup piston that can directly press a master piston from behind when output fluid pressure from a fluid pressure generation source is reduced is fluid-tightly and slidably fitted to a short cylindrical separator, a sleeve forming an annular channel between itself and an outer periphery of the backup piston is placed backward of the separator, and annular seal members for sealing front and rear sides of the annular passage are mounted between the separator and the backup piston, and between the sleeve and the backup piston. The seal member for sealing a front side of the annular passage is mounted to an inner periphery of the separator so as to come into repulsive contact with the outer periphery of the backup piston. The seal member for sealing a rear side of the annular passage is mounted to the outer periphery of the backup piston so as to come into repulsive contact with an inner periphery of the sleeve.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 13, 2007
    Assignee: Nissin Kogyo Co., Ltd.
    Inventors: Kazuhiro Tagata, Koji Sakai
  • Publication number: 20070128513
    Abstract: A battery pack is provided.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 7, 2007
    Applicant: Sony Corporation
    Inventors: Kazuhito Hatta, Masato Sato, Tsuyoshi Sugiyama, Hiroyuki Yamada, Koji Sakai, Norio Mamada, Takeru Yamamoto, Kazuo Honda
  • Patent number: 7213301
    Abstract: A folding device can be used for various kinds of electronic apparatuses and is capable of easy processing of parts and lowering of cost. Inner cases 16 and 17 are mounted in outer case 15, which houses fixed member 1 and movable member 13. Groove portions 16A and 17A for holding movable member 13 for movement in the axial direction are provided in inner cases 16 and 17 to construct the folding device.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: May 8, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Sakai, Katsuichi Minami, Takayuki Ishikawa, Toshio Ohie
  • Publication number: 20070064733
    Abstract: A receiving device receives, using wireless communication, (i) a connect packet for establishing a communication connection (9,600 bps) and (ii) a data packet which contains transfer data and whose communication speed (for example, 4 Mbps) is higher than that of the connect packet. The receiving device includes: an error status judging section for judging, when a reception status satisfies a predetermined first reception failure pattern, that a reception of the connect packet has failed; and a cause-of-error output section for, when the reception failure of the connect packet has occurred, outputting cause information, indicating the cause of the reception failure, to a user interface. Therefore, even if an error has occurred in the data transfer, the user can easily recognize an appropriate solution for the receiving device.
    Type: Application
    Filed: August 9, 2006
    Publication date: March 22, 2007
    Inventors: Shohei Osawa, Hitoshi Naoe, Fumihiro Fukae, Koji Sakai
  • Patent number: 7168134
    Abstract: An opening and closing device includes a fixed member, a movable member, a spring and a case. The fixed member is provided at a side with a fixed cam. The movable member is disposed so that it can rotate with respect to the fixed member, and provided at the side opposing to the fixed cam with a movable cam. The spring is for keeping the movable cam and the fixed cam in a state of elastic contact. The case has a substantially round cylindrical shape, and houses these items. There is a guiding mechanism formed between the case and the movable member for supporting the movable member so that it can move in the axis direction, which guiding mechanism is provided with a section of broader width at the end part facing to the fixed member.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: January 30, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuichi Minami, Koji Sakai, Toshio Ohie
  • Publication number: 20060290305
    Abstract: A motor control apparatus for controlling a motor with reduced noise and vibration includes a detecting means for detecting a rotational speed of the motor, a command signal processing means that generates a command signal for allowing the motor to rotate at a predetermined rotational speed, a drive means that generates a drive signal based on the command signal and supplies the drive signal to the motor, and a control signal generation means that generates a control signal for allowing the motor to produce a control torque having a frequency equal to one of frequencies of noise and vibration due to the motor. The frequency of the control torque corresponds to at least one of orders of the rotational speed detected by the detecting means. The command signal processing means generates the command signal based on the control signal.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 28, 2006
    Applicant: DENSO CORPORATION
    Inventors: Seiichiro Washino, Masaru Kamiya, Koji Sakai, Junichi Semura
  • Patent number: 7151226
    Abstract: An opening and closing device and an electronic apparatus using this device. In an urging section, a movable member including a movable cam on its side is urged by a spring. A slide member includes, at one end, a stationary cam, opposed to the movable cam, for resiliently contacting the movable cam. The movable member is urged in opening and closing directions in open and closed states, respectively, according to which portion of the stationary cam resiliently contacts the movable cam. A reversing section includes a release member and a reversing member. The release member includes a release cam resiliently contacting a support cam at the other end of the slide member, and the reversing member is inserted into the slide member and includes a reversing cam. When the release cam is disconnected from the support cam, the slide member slides axially, whereby the movable cam is disconnected from the stationary cam and resiliently contacts the reversing cam.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: December 19, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuichi Minami, Koji Sakai, Yasuchika Kudo, Masaki Nakase, Yusho Nakase, Takehiko Konja, Tatsuya Tsuda
  • Publication number: 20060242076
    Abstract: A transmission device is capable of transmitting data to a reception device via a transmission route and includes a digital content storage section for storing data under copyright protection. The data stored in the digital content storage section includes protection information for indicating whether the data is under copyright protection or not. The transmission device includes a copyright protection detection section for detecting whether data, transmission of which has been instructed, is under copyright protection or not and a transmission disallowance notification section for transmitting, to the reception device, transmission disallowance data indicating that the data is incapable of being transmitted because of copyright protection when it is detected that the data is under copyright protection. Therefore, it is possible to provide a transmission device and a reception device which keeps a user from being confused when the user instructs to transmit data incapable of being copied.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 26, 2006
    Inventors: Fumihiro Fukae, Hitoshi Naoe, Koji Sakai, Shohei Osawa
  • Publication number: 20060230758
    Abstract: There is provided a vehicle braking device in which a front outer periphery of a backup piston that can directly press a master piston from behind when output fluid pressure from a fluid pressure generation source is reduced is fluid-tightly and slidably fitted to a short cylindrical separator, a sleeve forming an annular channel between itself and an outer periphery of the backup piston is placed backward of the separator, and annular seal members for sealing front and rear sides of the annular passage are mounted between the separator and the backup piston, and between the sleeve and the backup piston. The seal member for sealing a front side of the annular passage is mounted to an inner periphery of the separator so as to come into repulsive contact with the outer periphery of the backup piston. The seal member for sealing a rear side of the annular passage is mounted to the outer periphery of the backup piston so as to come into repulsive contact with an inner periphery of the sleeve.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 19, 2006
    Inventors: Kazuhiro Tagata, Koji Sakai
  • Publication number: 20060230918
    Abstract: A vehicle braking device includes a stroke simulator provided between a control piston of a fluid pressure booster and a brake operation member, wherein the control piston has an inner peripheral surface partially including a tapered surface with a decreasing diameter toward the front. The stroke simulator includes an input member housed in the control piston slidably in an axial direction backward of the tapered surface and connected to the brake operation member, and an elastic body interposed between the input member and the control piston and housed in the control piston. The elastic body has a cylindrical shape so as to be elastically deformed according to an action of an axial compressive force along with an advancing operation of the input member, and prevented from being deformed sequentially from the front by restraint with the tapered surface according to an increase in the axial compressive force.
    Type: Application
    Filed: March 27, 2006
    Publication date: October 19, 2006
    Inventors: Kazuhiro Tagata, Koji Sakai, Yasushi Aoki, Kenji Suzuki, Hiroshi Nakano
  • Publication number: 20060230757
    Abstract: A fluid pressure booster includes: a control piston in which brake operation input acts in an advancing direction, and reaction based on fluid pressure of a booster fluid pressure generation chamber that generates fluid pressure for actuating a master piston acts in a retracting direction; a pressure increasing valve provided between the booster fluid pressure generation chamber and a fluid pressure generation source so as to open at the time of advance of the control piston and close at the time of retraction of the control piston; and a pressure reducing valve provided between a release chamber and the booster fluid pressure generation chamber so as to close at the time of the advance of the control piston and open at the time of the retraction of the control piston.
    Type: Application
    Filed: March 27, 2006
    Publication date: October 19, 2006
    Inventors: Kazuhiro Tagata, Koji Sakai, Takaomi Shirase, Yasushi Aoki, Kenji Suzuki, Hiroshi Nakano
  • Publication number: 20060215705
    Abstract: An error detection method for detecting an error of control information (parameters) of a physical channel and a mobile terminal are provided. In a receive side (mobile terminal), the size of each bit string generated in the transport channel HS-DSCH (High-Speed Downlink Shared Channel) processing (e.g. rate matching processing) in HSDPA (High-Speed Downlink Packet Access) is compared, so that an error of the control information, transmitted from the transmission side (base station) via the physical channel for control information HS-SCCH (High-Speed Shared Control Channel), is detected.
    Type: Application
    Filed: June 29, 2005
    Publication date: September 28, 2006
    Inventors: Syuuichi Murata, Koji Sakai
  • Publication number: 20060210060
    Abstract: The opening and closing device involves a stationary member, a stationary cam, a rotary cam, a rotary member, a spring disposed between the stationary member and the stationary cam which pushes the stationary cam against the rotary cam, and a shaft passing through the stationary member, the stationary cam, the spring, the rotary cam and the rotary member. A head of the shaft holds the stationary member or the rotary member rotatably at its first end, and a caulked portion of the shaft fixes the shaft to the rotary member or the stationary member at its second end. Upon opening or closing operation, the stationary member or the rotary member, which is fixed to the shaft, rotates with the shaft integrally, causing no wear. The opening and closing device can realize smooth and sure operation without irregular feeling.
    Type: Application
    Filed: March 15, 2006
    Publication date: September 21, 2006
    Inventors: Takayuki Ishikawa, Yasuchika Kudo, Koji Sakai, Masaki Nakase
  • Publication number: 20060198340
    Abstract: To realize smooth adaptive modulation control after handover even when the transmission frequency of parameters is lowered with transmission of the parameters used for the adaptive modulation control with timing satisfying predetermined conditions. As the mobile station for transmitting the parameters used for the adaptive modulation control in the timing satisfying the predetermined conditions, a mobile station comprises a transmitting unit for transmitting the parameters with the timing not satisfying the predetermined conditions.
    Type: Application
    Filed: July 29, 2005
    Publication date: September 7, 2006
    Inventors: Syuuichi Murata, Koji Sakai