Patents by Inventor Goroku Okawa

Goroku Okawa 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).

  • Rotary electric machine having stator rotation-restricting bolt
    Patent number: 6927520
    Abstract: A stator core is fixed to a housing by pressing an axial end portion thereof in an axial direction by a flange or a washer of a bolt. An intermediate member, which is softer than the flange or the washer of the bolt, is provided at a contact portion between the flange or the washer and the axial end portion of the stator core. The stator core may have a cavity to directly receive the flange or washer of the bolt in place of the intermediate member.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: August 9, 2005
    Assignee: Denso Corporation
    Inventor: Goroku Okawa
  • Alternator
    Patent number: 6617717
    Abstract: In an alternator, a pole core has a plurality of claw-pole pieces, and a cooling fan has a plurality of diagonal-flow-type blades and a plurality of centrifugal-flow-type blades. A combination of numbers of the claw-pole pieces and the diagonal-flow-type blades is determined to suppress an interference of wind noises caused by the claw-pole pieces and the diagonal-flow-type blades during operation, such that one of the numbers of the claw-pole pieces and the diagonal-flow-type blades is not divisible by the other and both numbers have no common divisor other than one. Further, a number of the centrifugal-flow-type blades is determined not to be divisible by the numbers of the diagonal-flow-type blades and the claw-pole pieces, and all the three numbers have no common divisor other than one.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: September 9, 2003
    Assignee: Denso Corporation
    Inventor: Goroku Okawa
  • Rotary electric machine having stator rotation-restricting bolt
    Publication number: 20020047476
    Abstract: A stator core is fixed to a housing by pressing an axial end portion thereof in an axial direction by a flange or a washer of a bolt. An intermediate member, which is softer than the flange or the washer of the bolt, is provided at a contact portion between the flange or the washer and the axial end portion of the stator core. The stator core may have a cavity to directly receive the flange or washer of the bolt in place of the intermediate member.
    Type: Application
    Filed: August 28, 2001
    Publication date: April 25, 2002
    Inventor: Goroku Okawa
  • Alternator
    Publication number: 20020047485
    Abstract: In an alternator, a pole core has a plurality of claw-pole pieces, and a cooling fan has a plurality of diagonal-flow-type blades and a plurality of centrifugal-flow-type blades. A combination of numbers of the claw-pole pieces and the diagonal-flow-type blades is determined to suppress an interference of wind noises caused by the claw-pole pieces and the diagonal-flow-type blades during operation, such that one of the numbers of the claw-pole pieces and the diagonal-flow-type blades is not divisible by the other and both numbers have no common divisor other than one. Further, a number of the centrifugal-flow-type blades is determined not to be divisible by the numbers of the diagonal-flow-type blades and the claw-pole pieces, and all the three numbers have no common divisor other than one.
    Type: Application
    Filed: September 12, 2001
    Publication date: April 25, 2002
    Inventor: Goroku Okawa