Patents by Inventor Hartley P. Dermond

Hartley P. Dermond 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).

  • Earth and road roller with oppositely skewed tandem steering drums
    Patent number: 4046485
    Abstract: A roller for treating earth and pavement surfaces includes two steering and surface treating drums arranged one after the other and skewed in opposite directions relative to the line of roller travel.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: September 6, 1977
    Assignee: William H. Clark
    Inventor: Hartley P. Dermond
  • Ditch-shaping roll and attachment for a road vehicle
    Patent number: 4039265
    Abstract: A roll and an attachment using such a roll are disclosed for a road vehicle for forming a ditch by pressure in a rolling motion or shaping a pre-existing ditch by the same coaction. The roll member includes a centrally-located cylindrical surface adapted to form or to shape the base surface of a ditch and opposed shaping surfaces located on the opposite sides of the cylindrical surface for forming or shaping the opposed sidewalls of the ditch. The shaping surfaces may be conical or curvilinear, for example. Means are disclosed for removably securing the roll member to a road vehicle, such as an earth grader. A method for using such a member for forming or shaping a ditch is also enclosed.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: August 2, 1977
    Assignee: William H. Clark
    Inventor: Hartley P. Dermond