Patents by Inventor Hirofumi Ueda

Hirofumi Ueda 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: 20210131549
    Abstract: A worm reducer includes a worm shaft; a worm wheel; a housing that houses the worm shaft and the worm wheel; a bearing that holds the worm shaft inside the housing; a coil spring that contacts an outer peripheral surface of the bearing and applies an urging force toward the worm wheel; and a preload member that is screwed into and fixed to the housing and pressurizes the coil spring. A winding direction of the coil spring is different from a winding direction of a thread of the preload member, and contact resistance between the coil spring and the preload member is greater than contact resistance between the coil spring and the bearing.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Naofumi KAWAMURA, Hirofumi UEDA
  • Publication number: 20210095801
    Abstract: A fitting nut made of a resin material includes: a hollow, large-diameter tube portion having a female thread formed on its inner peripheral wall; and a small-diameter tube portion that is continuous to the large-diameter tube portion and having a hollow cylindrical shape with a smaller diameter than the large-diameter tube portion. The small-diameter tube portion includes, in the outer peripheral wall thereof, a plurality of engagement grooves that are depressed inwardly in the diameter direction of the small-diameter tube portion and extend along the longitudinal direction that is orthogonal to the diameter direction.
    Type: Application
    Filed: September 21, 2020
    Publication date: April 1, 2021
    Applicant: SMC CORPORATION
    Inventors: Yoshitada DOI, Yuzuru OKITA, Yoji NIIMI, Hirofumi UEDA, Tsugumichi FUJIWARA
  • Patent number: 10883594
    Abstract: An urging member urges a first end of a worm shaft toward a worm wheel via a first bearing. The worm shaft includes a tooth flank forming portion and a non-tooth flank forming portion formed between the first end and the tooth flank forming portion. In a housing, a shaft housing portion that houses the worm shaft includes a substantially straight portion and a reduced diameter portion. The substantially straight portion has a substantially constant bore diameter, and extends in an axial direction of the worm shaft. The reduced diameter portion is arranged on the first end side with respect to the substantially straight portion, and has a bore diameter reduced from a position that overlaps tooth flanks in the axial direction to a position that overlaps the non-tooth flank forming portion in the axial direction.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: January 5, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Hirofumi Ueda, Naofumi Kawamura
  • Publication number: 20200300383
    Abstract: In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.
    Type: Application
    Filed: March 18, 2020
    Publication date: September 24, 2020
    Applicant: SMC Corporation
    Inventors: Yoshitada DOI, Yuzuru OKITA, Yoji NIIMI, Hirofumi UEDA, Tsugumichi FUJIWARA
  • Patent number: 10772882
    Abstract: A problem to be solved by the present invention is to provide a novel preventive or therapeutic agent for pulmonary hypertension containing as an active ingredient a compound that has not been known for a therapeutic effect on pulmonary hypertension heretofore. The present invention provides a preventive or therapeutic agent for pulmonary hypertension containing emetine or a salt thereof.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: September 15, 2020
    Assignee: TOHOKU UNIVERSITY
    Inventors: Hiroaki Shimokawa, Hidetoshi Tokuyama, Hirofumi Ueda, Jyunken Aoki, Takayuki Doi, Kuniyuki Kano, Kimio Satoh, Ryo Kurosawa
  • Patent number: 10661822
    Abstract: A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: May 26, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Naofumi Kawamura, Hirofumi Ueda, Kaname Joushita
  • Publication number: 20190321354
    Abstract: A problem to be solved by the present invention is to provide a novel preventive or therapeutic agent for pulmonary hypertension containing as an active ingredient a compound that has not been known for a therapeutic effect on pulmonary hypertension heretofore. The present invention provides a preventive or therapeutic agent for pulmonary hypertension containing emetine or a salt thereof.
    Type: Application
    Filed: March 28, 2017
    Publication date: October 24, 2019
    Applicant: TOHOKU UNIVERSITY
    Inventors: Hiroaki SHIMOKAWA, Hidetoshi TOKUYAMA, Hirofumi UEDA, Jyunken AOKI, Takayuki DOI, Kuniyuki KANO, Kimio SATOH, Ryo KUROSAWA
  • Patent number: 10310931
    Abstract: Provided are a communications state determination device, etc., capable of improving the accuracy of network state specification. This communications state estimation device comprises: a setting means that, in accordance with given communications parameters, applies the communications parameters to a communications device that determines the occurrence of communications errors in communications with a communications destination device; a detection means that sends communications instructions to the communications device that performs communications, in accordance with received communications instructions, and detects the occurrence of communications errors that have been determined in the communications that are in accordance with the instructions; and an estimation means that estimates whether or not the communications device can perform the communications, on the basis of the communications parameters and the existence or otherwise of communications errors.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: June 4, 2019
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Ueda, Shunichi Kinoshita, Norio Yamagaki, Kazumine Ogura, Norihito Fujita
  • Patent number: 10225786
    Abstract: A node device has a delivery predictability management part, a DTN communication part, and a user interface part. The delivery predictability management part stores, for each destination node, delivery predictabilities including a delivery predictability for the destination node calculated by a local node and a delivery predictability for the destination node calculated by a neighboring node. The DTN communication part refers to the delivery predictabilities for each destination node and selects a next hop node in transferring transfer data from the local node to the destination node. The user interface part allows selection of a destination node for DTN communication with the local node as a source node on a basis of the delivery predictabilities for each destination node.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: March 5, 2019
    Assignee: NEC Corporation
    Inventors: Norihito Fujita, Norio Yamagaki, Hirofumi Ueda, Shunichi Kinoshita
  • Publication number: 20190040945
    Abstract: An urging member urges a first end of a worm shaft toward a worm wheel via a first bearing. The worm shaft includes a tooth flank forming portion and a non-tooth flank forming portion formed between the first end and the tooth flank forming portion. In a housing, a shaft housing portion that houses the worm shaft includes a substantially straight portion and a reduced diameter portion. The substantially straight portion has a substantially constant bore diameter, and extends in an axial direction of the worm shaft. The reduced diameter portion is arranged on the first end side with respect to the substantially straight portion, and has a bore diameter reduced from a position that overlaps tooth flanks in the axial direction to a position that overlaps the non-tooth flank forming portion in the axial direction.
    Type: Application
    Filed: July 26, 2018
    Publication date: February 7, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Hirofumi UEDA, Naofumi KAWAMURA
  • Patent number: 10172148
    Abstract: A data-storing-terminal counting unit counts the number of communication terminals in which each of a number of data are stored. Based on the results of the counts, a communication terminal count estimation unit estimates the number of communication terminals that will transmit data with the same timing. An adjustment reference value calculation unit computes an adjustment reference value for constraining the number of communication terminals estimated by the communication terminal count estimation unit to be less than or equal to a preset allowable number. On the basis of the adjustment reference value computed by the adjustment reference value calculation unit, a determination unit determines whether or not to permit transmission of data stored by a storing means. If the determination unit permits the transmission of said data, a data transmission unit transmits the data to a communication terminal in which said data is not stored.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: January 1, 2019
    Assignee: NEC CORPORATION
    Inventors: Norio Yamagaki, Shunichi Kinoshita, Hirofumi Ueda, Norihito Fujita
  • Publication number: 20180304915
    Abstract: A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 25, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Naofumi KAWAMURA, Hirofumi UEDA, Kaname JOUSHITA
  • Patent number: 9860158
    Abstract: The purpose of the present application is to provide a technique for the exchange of path information between different routing domains, which, while reducing the exchange of useless path information in the stage for constructing a hierarchical structure, can maintain robustness of path recognition that tolerates network partition.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: January 2, 2018
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Ueda, Norihito Fujita
  • Patent number: 9807780
    Abstract: A request possibility determination unit 13 for a communications terminal 1-1 determines whether or not communications time required for obtaining data from a communications terminal 1-2 can be secured, between the communications terminal 1-2 and the communications terminal 1-1. A data acquisition unit 12: determines data that has not been stored in a data storage unit 14, among data on a list received as a result of a communications message from another communications terminal 1-2; and requests the determined data from the communications terminal 1-2, by using a communications message on the condition that the request possibility determination unit 13 has determined that communications time can be secured.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: October 31, 2017
    Assignee: NEC Corporation
    Inventors: Norihito Fujita, Hirofumi Ueda
  • Publication number: 20170265067
    Abstract: Provided are a communication terminal device and the like that enable efficient transmission and reception of information among a plurality of communication terminal devices, even in an environment with no communication management device that manages and controls the communication terminal devices in a centralized manner. The communication terminal device includes a reception control unit for determining a reception port number on the basis of a first identifier that can identify a first application; a filtering unit for setting the reception port number as a reception port number for the first application; and a transmission control unit for determining, on the basis of a second identifier that can identify a second application, a destination port number indicating a destination in a specific communication terminal device.
    Type: Application
    Filed: August 3, 2015
    Publication date: September 14, 2017
    Applicant: NEC Corporation
    Inventors: Hirofumi UEDA, Shunichi KINOSHITA, Norio YAMAGAKI, Kazuaki NAKAJIMA
  • Publication number: 20170142747
    Abstract: A data-storing-terminal counting unit counts the number of communication terminals in which each of a number of data are stored. Based on the results of the counts, a communication terminal count estimation unit estimates the number of communication terminals that will transmit data with the same timing. An adjustment reference value calculation unit computes an adjustment reference value for constraining the number of communication terminals estimated by the communication terminal count estimation unit to be less than or equal to a preset allowable number. On the basis of the adjustment reference value computed by the adjustment reference value calculation unit, a determination unit determines whether or not to permit transmission of data stored by a storing means. If the determination unit permits the transmission of said data, a data transmission unit transmits the data to a communication terminal in which said data is not stored.
    Type: Application
    Filed: June 22, 2015
    Publication date: May 18, 2017
    Applicant: NEC Corporation
    Inventors: Norio YAMAGAKI, Shunichi KINOSHITA, Hirofumi UEDA, Norihito FUJITA
  • Publication number: 20170116063
    Abstract: Provided are a communications state determination device, etc., capable of improving the accuracy of network state specification. This communications state estimation device comprises: a setting means that, in accordance with given communications parameters, applies the communications parameters to a communications device that determines the occurrence of communications errors in communications with a communications destination device; a detection means that sends communications instructions to the communications device that performs communications, in accordance with received communications instructions, and detects the occurrence of communications errors that have been determined in the communications that are in accordance with the instructions; and an estimation means that estimates whether or not the communications device can perform the communications, on the basis of the communications parameters and the existence or otherwise of communications errors.
    Type: Application
    Filed: June 11, 2015
    Publication date: April 27, 2017
    Applicant: NEC Corporation
    Inventors: Hirofumi Ueda, Shunichi Kinoshita, Norio Yamagaki, Kazumine Ogura, Norihito Fujita
  • Publication number: 20170094582
    Abstract: A communication terminal in an ad hoc network has a wireless communication part, a lower layer protocol part operating on a lower layer of the network, and an upper layer protocol part operating on an upper layer of the network. The lower layer protocol part has a routing table holding route information including a destination IP address and a next hop IP address associated with each other. The upper layer protocol part has: an information sharing management part transmitting and receiving a message including an IP address of the local communication terminal to and from a neighbor communication terminal through the wireless communication part by broadcast communication; and a route information registration part registering, into the routing table, the route information including the IP address included in the message received by broadcast communication as the destination IP address and as the next hop IP address.
    Type: Application
    Filed: December 17, 2014
    Publication date: March 30, 2017
    Applicant: NEC Corporation
    Inventors: Hirofumi UEDA, Norihito FUJITA, Norio YAMAGAKI, Shunichi KINOSHITA
  • Patent number: 9504035
    Abstract: A communication terminal, comprises: a wireless communication unit to which a plurality of channels are allocated; a channel status calculation unit that calculates, when one of the plurality of channels is set as a forwarding channel, a capacity that can be used in the one channel by the communication terminal and a capacity that can be used in the one channel by another communication terminal; and a channel selection unit that determines, when one of the plurality of channels is set as a forwarding channel, whether a capacity that can be used in the one channel by the communication terminal satisfies a required bandwidth and determines, when another communication terminal has set the one channel as a forwarding channel, whether a capacity that can be used in the one channel by the another communication terminal satisfies the required bandwidth.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: November 22, 2016
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Ueda, Norihito Fujita
  • Patent number: 9504020
    Abstract: Upon sensing an update of any routing information entry held in a routing information storage unit (A104), an information exchange coordination unit (A105) references a node information storage unit (A102), and if a node information entry corresponding to the updated routing information entry does not exist, acquires the corresponding node information entry from another communication terminal (A1b). Alternatively, upon sensing an update of any node information entry held in the node information storage unit (A102), the information exchange coordination unit (A105) references the routing information storage unit (A104), and if a routing information entry corresponding to the updated node information entry does not exist, acquires the corresponding routing information entry from another communication terminal (A1b). This provides a communication terminal for acquiring both the node information entry and the routing information entry relating to a specific communication terminal substantially at the same time.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: November 22, 2016
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Ueda, Norihito Fujita