Patents Assigned to D. R. Johnston
  • Lawn edger
    Patent number: 5692572
    Abstract: This invention relates to a grass cutting apparatus using a generally disk-shaped cutter which is bias against the edge against which it is cutting while allowing some vertical and lateral movement of the cutting disk. The preferred embodiments relate to such a cutting disk provided as an attachment to such additional apparatus such as a motor mower and seeks to decrease the accuracy with which an operator must attempt to keep the mower from the border between the grass and the concrete or similar such material forming a border.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: December 2, 1997
    Assignees: B. S. Johnston, R. J. Johnston, W. H. Johnston, D. R. Johnston
    Inventors: John Edward Cloney, Brian Steven Johnston