Bit Patents (Class 144/241)
  • Patent number: 3981337
    Abstract: The knife assembly consists essentially of a relatively light two-edged cutting insert and a heavier holder. The insert is symmetrical about its longitudinal axis. In cross-section the two cutting edges of the insert represent the acute corners of a parallelogram, the obtuse corners of which are occupied by two longitudinal grooves that are hook-shaped in cross section. The holder includes a base plate having a projection complementary to either of said grooves. A clamping plate secures the insert on the base plate and binds said projection and said hook-like groove together. In the assembled knife the cutting edge of the insert is bounded by two plane surfaces one of which is flush with a plane surface on the holder and the other of which is flush with a plane surface on the clamping plate.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: September 21, 1976
    Assignee: Sandvik Aktiebolag
    Inventor: Erik Wilhelm Sundstrom
  • Patent number: 3976271
    Abstract: The tool holder is provided with a setbolt having a T-shaped cross section head including a rectangular end plate which fits into a T-shaped cross section slot in the associated tool providing ease of tool assembly and disassembly for servicing and sharpening. The tool holder and the tool are similarly shaped to provide a smooth exterior surface for the assembly which does not have cavities and pockets causing troublesome accumulations of chips and splinters.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: August 24, 1976
    Assignee: Pitea Maskin Industri Nystrom & Larsson AB
    Inventors: Gosta Larsson, Kjell Signar Nystrom
  • Patent number: 3973607
    Abstract: A debarking tool for debarking hollow rotors, comprising a shaft carrying a radially extending arm, said arm being pressed integrally from a steel plate to the shape of a chute adapted to face its concave side onto the feed direction of a log to be debarked.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: August 10, 1976
    Assignee: Brundell Och Jonsson AB
    Inventor: Karl-Erik A. Jonsson