Patents by Inventor Masayuki Yaegashi

Masayuki Yaegashi 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: 4706446
    Abstract: A lawn mower having a housing and a cutter unit positioned below the housing. The cutter unit comprises an upper rotating cutting unit and a lower stationary cutting unit that is concentric with the upper cutting unit and which have a plurality of upper and lower blades at their borders. Each blade has a cutting surface with a near end close to the border, and a far end away from the border. The blades of the upper cutting unit extend in front of a line passing through the concentric axis and the near end, in the direction of rotation of the upper cutting unit.The upper blades rotate and slide over stationary lower blades, thereby cutting the lawn in a manner similar to a pair of scissors. The angle between the upper and lower blades is preferably 16-20 degrees.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: November 17, 1987
    Assignee: Fuso Keigokin Co., Ltd.
    Inventors: Hachiro Doi, Masayuki Yaegashi
  • Patent number: 4520619
    Abstract: A lawn mower having a housing and a cutter unit positioned below the housing. The cutter unit comprises an upper rotating cutting unit and a lower stationary cutting unit that is concentric with the upper cutting unit and which have a plurality of upper and lower blades at their borders. Each blade has a cutting surface with a near end close to the border, and a far end away from the border. The blades of the upper cutting unit extend in front of a line passing through the concentric axis and the near end, in the direction of rotation of the upper cutting unit. The upper blades rotate and slide over stationary lower blades, thereby cutting the lawn in a manner similar to a pair of scissors. The angle between the upper and lower blades is preferably 16-20 degrees.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: June 4, 1985
    Assignee: Fuso Keigokin Co., Ltd.
    Inventors: Hachiro Doi, Masayuki Yaegashi
  • Patent number: 4262475
    Abstract: The present invention is directed to an apparatus and method for collecting the discharged grass clippings of a lawn mower. The lawn mower includes a discharge opening at the lateral side or the rear side of the lawn mower. Grass clippings are directed through the discharge opening to a conveyor member, thereafter the clippings are deposited in a catcher. The present invention does not require a high speed air flow to discharge the grass clippings. Further, since the grass clippings are discharged by a conveyor member into the top opening of a catcher the level of grass clippings positioned in the catcher may readily be observed so that it is very easy to determine when the catcher should be emptied.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: April 21, 1981
    Assignee: Fuso Keigokin Co., Ltd.
    Inventors: Katsuhiko Takahashi, Hachiro Doi, Masayuki Yaegashi