Patents by Inventor Duane L. Davis

Duane L. Davis 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: 4516442
    Abstract: A ratchet device is provided and includes a ratchet mechanism mounted in a housing assembly and a work arm protruding therefrom. The ratchet mechanism includes a ratchet wheel which is secured to the work arm and which is rotatably mounted on an axle and a pawl arm which is mounted at one end in the housing assembly and which is biased to engage canted ratchet teeth on the circumferential surface of the ratchet wheel. A pawl release member selectively moves the pawl arm between one position permitting engagement of its free end with the ratchet teeth and a second position disengaging the free end from the ratchet teeth. A detent is provided to maintain the pawl release member in a selected one of these positions. Preferably, the detent includes a rotatable shaft having a cam which defines the detent and a notch which receives a portion of the pawl arm to define a pawl release. The shaft is preferable oriented parallel to the axis of the axle to define a plane of symmetry.
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: May 14, 1985
    Inventor: Duane L. Davis
  • Patent number: 4203308
    Abstract: An arrow straightener for testing and straightening bent arrow shafts is provided with a pair of arrow supports, each of which has a bearing surface that is rotatable about an axis normal to a vertical plane through the longitudinal axis of an arrow positioned on the supports to maintain the bearing surface in flat contact relation to the arrow shaft, a press mechanism between the supports for applying a straightening pressure on the arrow shaft, and a deflection indicator with a feeler that extends through the press mechanism into contact with the shaft, the feeler being movable independent of the press but located at a point central to the pressure applying surface. The apparatus also includes a scale, indicator, weighted body, and spacer for testing the spine strength of wooden arrow shafts.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: May 20, 1980
    Inventor: Duane L. Davis