Patents by Inventor Joseph R. Bradstreet, Jr.

Joseph R. Bradstreet, Jr. 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).

  • Slabber with fixed counterknife and adjustable knife and clamp
    Patent number: 5439039
    Abstract: A log-slabbing chipper with multiple knife structures distributed about the periphery of a power-driven rotor head. Each knife structure includes a holder and a pair of assemblies mounting double-edge replaceable knives. Each knife is mounted between a clamp and a fixed counterknife. Each knife has a serrated back-bearing surface and each clamp has a correspondingly serrated clamping surface. Adjusting screws exert pressure on the clamps to slide the clamps and the knives with respect to the stationary counterknives to achieve desired precise edge positions.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: August 8, 1995
    Assignee: Pacific Saw and Knife Company
    Inventors: Joseph R. Bradstreet, Jr., Keith H. Hewitt, David S. Macey
  • Chipper disc assembly having extended-life regrindable disposable knives
    Patent number: 5271440
    Abstract: A knife assembly for a disc type wood chipper includes a reversible disposable knife having a serrated back bearing surface positioned between a serrated knife clamp and a flat counterknife. The knife can be reground and advanced along the serrated clamping surface of the clamp so as to maintain a desired edge position with respect to the surface of the chipper disc and the anvil surface.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: December 21, 1993
    Assignee: Pacific/Hoe Saw and Knife Company
    Inventors: Joseph R. Bradstreet, Jr., Michael Cubbon, Ronald Danielson, Keith H. Hewitt, David S. Macey