Patents by Inventor Takeshi Fujimoto

Takeshi Fujimoto 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: 6564782
    Abstract: A fuel evaporation control system is connected to an engine control system in which an air-fuel ratio in mixture gas supplied to an engine is controlled to an optimum level. Fuel evaporated from a fuel tank is absorbed by a canister, and the absorbed fuel is purged into the engine. Deterioration of the canister in its air-permeability is detected based on measured pressure in the fuel evaporation control system or calculated density in the purge gas, both the pressure and the density being measured or calculated under two different amounts of purge gas flow. Deterioration of the canister in its fuel-absorbing ability is also detected based on the purge gas density.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: May 20, 2003
    Assignee: Denso Corporation
    Inventors: Takeshi Fujimoto, Keiji Wakahara
  • Publication number: 20030002820
    Abstract: An optical communication module includes (a) at least one light-emitting device, at least one light-receiving device, or a combination of these; (b) an optically coupling means coupled optically with the device or each device; (c) an electric-circuit part connected to the device or each device; (d) multiple layers of electroconductive media supporting the device or devices, the optically coupling means or these optically coupling means, and the electric-circuit part or parts; and (e) a connector portion formed at the end portion of each of the electroconductive media. The insertion of the next-stage circuit substrate between the connector portions enables the electrical connection between the module and the next-stage circuit substrate having a multitude of leads without requiring a large space. An insulating spacer placed between the layers of the electroconductive media secures the electrical and thermal insulation. The module has a property of high-speed response.
    Type: Application
    Filed: June 21, 2002
    Publication date: January 2, 2003
    Inventors: Hiromi Nakanishi, Yoshiki Kuhara, Takeshi Oakada, Yoichiro Yamaguchi, Takeshi Fujimoto
  • Publication number: 20020112703
    Abstract: A fuel evaporation control system is connected to an engine control system in which an air-fuel ratio in mixture gas supplied to an engine is controlled to an optimum level. Fuel evaporated from a fuel tank is absorbed by a canister, and the absorbed fuel is purged into the engine. Deterioration of the canister in its air-permeability is detected based on measured pressure in the fuel evaporation control system or calculated density in the purge gas, both the pressure and the density being measured or calculated under two different amounts of purge gas flow. Deterioration of the canister in its fuel-absorbing ability is also detected based on the purge gas density.
    Type: Application
    Filed: February 21, 2002
    Publication date: August 22, 2002
    Inventors: Takeshi Fujimoto, Keiji Wakahara
  • Publication number: 20020086066
    Abstract: An improved skin cleaning composition made by introducing about 0.7% to about 2.0% by weight gas-activated charcoal to a base skin cleaning composition.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Takeshi Fujimoto, Hidenori Yokoi
  • Patent number: 6148803
    Abstract: A leakage diagnosing apparatus for an evaporated gas purge system, which executes purge system leakage diagnosis based on a detected pressure change amount and an introduced pressure which is introduced into a part of the purge system including at least a fuel tank and a canister. The detected pressure change amount is obtained by detecting pressure in the part of the purge system after such part of the purge system is hermetically sealed. Accordingly, the reliability of the leakage diagnosis is improved because an erroneous diagnosis caused by the introduced pressure is prevented. The detected pressure change amount may be compensated based on the introduced pressure into the sealed gas purge system. Accordingly, an erroneous leakage determination is prevented, and the reliability of leakage determination is improved.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: November 21, 2000
    Assignee: Denso Corporation
    Inventors: Yoshihiro Majima, Takeshi Fujimoto, Keiji Wakahara, Junya Morikawa, Shigenori Isomura, Makoto Miwa
  • Patent number: 6082337
    Abstract: When a diagnosis execution condition is established, a canister closure valve is closed, thereafter, a purge control valve is opened, a purge control valve is closed in a state where negative pressure is introduced into an evaporated gas system to thereby maintain the evaporated gas system in a hermetically-sealed state and the hermetically-sealed state is continued until abnormality diagnosis is finished. Time period for maintaining the evaporated gas system in the hermetically-sealed state is divided into three time periods of a pressure change determining time period at a first time, an awaiting time period and a pressure change determining time period at a second time.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: July 4, 2000
    Assignee: Denso Corporation
    Inventors: Takeshi Fujimoto, Masaaki Nakayama, Yasuo Mukai, Hisayo Dohta, Keiji Wakahara, Junya Morikawa, Makoto Miwa