Harvester Knife Patents (Class 451/225)
  • Patent number: 7540798
    Abstract: An eyeglass lens processing apparatus includes: an endmill that bevels a periphery of lens by a tip thereof so that an angle made by a bevel and a bevel foot substantially coincides with an angle of the tip; a moving unit that includes an inclining unit that inclines the endmill relative to the lens chuck; an operating portion that calculates front surface side beveling data and rear surface side beveling data; and a control portion that controls the moving unit based on the front surface side beveling data to bevel the front surface side of the lens and controls the moving unit based on the rear surface side beveling data to bevel the rear surface side of the lens.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: June 2, 2009
    Assignee: Nidek Co., Ltd.
    Inventor: Ryoji Shibata
  • Patent number: 5618226
    Abstract: An apparatus for grinding a blade used in, for example, a glass or hedge trimmer including grinder support and a blade mount provided close to each other. The grinder support holds a grinder, which has a round grindstone, in such a manner that the grinding surface of the grindstone can be oriented not only horizontally and vertically but also in an inclined direction so as to meet the action angle of the tooth of the blade; and the blade mount includes a horizontal surface section and a sloped surface section so that the trimmer blade is place thereon when ground by the grindstone held on the grinder support.
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: April 8, 1997
    Assignee: Nikkari Co., Ltd.
    Inventor: Hisashi Ueyama