With Complementary Tool-faces (e.g., For Embossing) Patents (Class 72/414)
Constant profile (e.g., cylindrical segments) (Class 72/415)
  • Single piece tree shear blade having cylindrically curved cutting portion and method of making same
    Patent number: 4061167
    Abstract: A tree shear blade is formed by pressing a pre-shaped flat metal plate or blank into a die shaped to turn up opposite side and rear tabs of the blank to form mounting portions of the blade and to cylindrically curve a central portion of the blank to form a cutting portion of the blade. The side and rear tabs are then welded together.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: December 6, 1977
    Assignee: Deere & Company
    Inventors: James Knox Dunn, III, Lee Everett Tucker, Andrew Paul Redman
  • Method and apparatus for coining and curving looped wire
    Patent number: 4004447
    Abstract: Looped wire initially having a circular cross section is, with a single application of pressure between dies, simultaneously coined to a wedge shape and curved in a portion thereof extending between loops.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: January 25, 1977
    Assignee: Wedge Wire Corporation
    Inventor: Joseph W. Wantling