Patents by Inventor Masahiro MAEGAWA

Masahiro MAEGAWA 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: 11845168
    Abstract: A reciprocating tool includes a motor, a driving mechanism, a body housing, a movable part, and a vibration control mechanism. The driving mechanism includes a reciprocating member configured to reciprocate in a first direction. The movable part is connected to the body housing via a first elastic member and a second elastic member to be relatively movable in the first direction. The vibration control mechanism includes at least one weight configured to move in a direction opposite to the reciprocating member. The center of gravity of the at least one weight is offset from the driving axis in a second direction. In the second direction, the first elastic member is closer to the center of gravity than the second elastic member. A load of the first elastic member when the movable part is placed in a closer position is smaller than a load of the second elastic member.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: December 19, 2023
    Assignee: MAKITA CORPORATION
    Inventors: Hideki Tsuji, Hajime Takeuchi, Kei Watanabe, Kazuo Muramatsu, Masahiro Maegawa
  • Publication number: 20230241752
    Abstract: A power tool having a hammer mechanism includes a first housing, a motor housed in the first housing, a second housing that at least partially covers the first housing, and a controller housed in the second housing. The second housing is coupled to the first housing via at least one elastic member to be movable relative to the first housing in a first direction that is parallel to the driving axis. The second housing has at least one opening for wiring. The at least one opening communicatively connects an inside and an outside of the second housing. At least one electric wire extends from the controller to the outside of the second housing through the at least one opening.
    Type: Application
    Filed: January 11, 2023
    Publication date: August 3, 2023
    Applicant: MAKITA CORPORATION
    Inventors: Masahiro MAEGAWA, Kiyonobu YOSHIKANE, Kazuki NAKAGAWA, Yuzuru NISHIO
  • Publication number: 20210129307
    Abstract: A reciprocating tool includes a motor, a driving mechanism, a body housing, a movable part, and a vibration control mechanism. The driving mechanism includes a reciprocating member configured to reciprocate in a first direction. The movable part is connected to the body housing via a first elastic member and a second elastic member to be relatively movable in the first direction. The vibration control mechanism includes at least one weight configured to move in a direction opposite to the reciprocating member. The center of gravity of the at least one weight is offset from the driving axis in a second direction. In the second direction, the first elastic member is closer to the center of gravity than the second elastic member. A load of the first elastic member when the movable part is placed in a closer position is smaller than a load of the second elastic member.
    Type: Application
    Filed: October 20, 2020
    Publication date: May 6, 2021
    Applicant: MAKITA CORPORATION
    Inventors: Hideki TSUJI, Hajime TAKEUCHI, Kei WATANABE, Kazuo MURAMATSU, Masahiro MAEGAWA
  • Patent number: 8653388
    Abstract: A switch device for a power tool includes a switch case and a switch lever. The switch lever extends outwardly from within the switch case. The switch lever has a rotative portion rotatably supported by a support portion of the switch case. A waterproofing member is disposed between the rotative portion and the support portion and provides a waterproof seal therebetween.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: February 18, 2014
    Assignee: Makita Corporation
    Inventors: Junichi Nishikimi, Masahiro Maegawa, Akira Tomonaga
  • Publication number: 20110056813
    Abstract: A switch device for a power tool includes a switch case and a switch lever. The switch lever extends outwardly from within the switch case. The switch lever has a rotative portion rotatably supported by a support portion of the switch case. A waterproofing member is disposed between the rotative portion and the support portion and provides a waterproof seal therebetween.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 10, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Junichi NISHIKIMI, Masahiro MAEGAWA, Akira TOMONAGA