Weldless Patents (Class 59/10)
  • Patent number: 4279122
    Abstract: A method of making a chain generally consisting of forming at least two links integrally so that the two links are interlocked and are joined together and then severing the links along the joint to provide at least two separate, interlocked links.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: July 21, 1981
    Assignee: Dresser Industries, Inc.
    Inventor: James B. Rogers
  • Patent number: 4218877
    Abstract: Apparatus and method of machining a long wooden rod of square cross-section, of selected dimension, so as to provide a multi-link chain of separate inter-linked oval links. In its simplest form, the machine involves a single rotating cutter assembly, which includes two thin rectangular blades spaced apart, and contiguous with a central smaller radius portion, which has a concave contour. In the preferred arrangement four cutters are applied with the plane of each cutter coincident with a diagonal plane of the square rod and positioned over one corner, so as to provide a wooden cross with each arm rounded on its outer edge. By applying the cutters in such a way each of the links in one arm of the cross are cut to a selected length and rounded. By applying the cutters to each corner of the rod, a plurality of links lying in perpendicular planes are provided, which links are attached to each other at their ends.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: August 26, 1980
    Inventor: Elmer L. McLain