Patents by Inventor James N. Mitchell

James N. Mitchell 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).

  • Method and apparatus to fell a tree
    Patent number: 4921024
    Abstract: A method and apparatus to fell a tree is disclosed. A vehicle mountable felling head includes a circular saw mounted to the felling head. A guard overlays the circular saw as a safety measure. The guard has a first portion which is fixed. The fixed portion of the guard has an opening exposing a first arcuate portion of the saw. The guard also has a second, movable portion which overlays a second arcuate portion of the circular saw. The second portion of the guard may be raised to expose a second arcuate portion of the circular saw to cut a slot in one side of a tree with the cut being completed by the first arcuate portion thereby allowing a tree greater in diameter than the radius of the circular saw to be severed.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: May 1, 1990
    Assignee: Blount, Inc.
    Inventors: Ronald W. Wiemeri, James N. Mitchell
  • Vehicle mountable tree felling apparatus
    Patent number: 4848424
    Abstract: A tree felling apparatus mountable to a vehicle includes a frame defining an opening for receiving a tree and a chain saw mounted for linear movement across the opening for felling the tree. One side of the opening is defined by an anvil having a sharpened edge for increasingly engaging the tree as the frame is advanced to receive the tree within the opening. The sharpened edge also extends sufficiently so that it overlaps the leading edge of the chain saw as the saw completes its cut. The anvil thus serves as a stationary, stable pivot point for the falling tree and protects the underlying chain from the force of the falling tree. Wedges are spaced across the saw bar of the chain saw for directionally felling the tree.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: July 18, 1989
    Assignee: Blount, Inc.
    Inventors: Ronald W. Wiemeri, James N. Mitchell
  • Modified phenolic tackifier
    Patent number: 4146513
    Abstract: Tack is imparted to uncured elastomers by the inclusion of the product of the reaction between an alkylphenol-formaldehyde condensation product having methylol groups with di-2-hydroxyalkylamine or morpholine. In addition to imparting tack to the elasatomer, the tackifier of this invention does not interfere with but tends to enhance the development of adhesion of the elastomer to reinforcing fibers.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: March 27, 1979
    Assignee: Ashland Oil, Inc.
    Inventors: Elsworth J. Weaver, James N. Mitchell
  • Modified phenolic tackifier
    Patent number: 4146512
    Abstract: Tack is imparted to uncure elastomers by the inclusion of the product of the reaction between an alkylphenol-formaldehyde condensation product having methylol groups with di-2-hydroxyalkylamine or morpholine. In addition to imparting tack to the elastomer, the tackifier of this invention does not interfere with but tends to enhance the development of adhesion of the elastomer to reinforcing fibers.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: March 27, 1979
    Assignee: Ashland Oil, Inc.
    Inventors: Elsworth J. Weaver, James N. Mitchell