Patents by Inventor Douglas Darrell Miller

Douglas Darrell Miller 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).

  • Arbor and circular saw with asymmetric spline having generally radial force-transmitting face
    Patent number: 5799558
    Abstract: An arbor is formed with uniformly-spaced splines each of which has a cross-section in the shape of an asymmetric trapezoid. The leading force transmitting face of each of the splines is disposed at an angle lagging by about seven degrees from a truly radially-extending plane of the arbor. The trailing face of each of the splines is disposed other than in a generally radially-extending plane of the arbor. A circular saw blade mounted on the arbor has a central opening or eye formed with complementarily shaped recesses such that the arbor splines fit within the recesses in the eye for transmission of torque from arbor to saw.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: September 1, 1998
    Assignees: Pacific Saw and Knife Company, Precision Tool & Die Corporation Of Shreveport, Inc.
    Inventors: Keith H. Hewitt, Douglas Darrell Miller, Steve Bryant Wilson