Patents by Inventor George Robert Ruff

George Robert Ruff 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 of making a rung assembly for a ladder
    Patent number: 4100668
    Abstract: The rung assembly is made of two piece construction and of metal while the siderail is made of a reinforced plastics material. The rung assembly includes a rung having a hollow end and a flanged fitting which is secured over the hollow end of the rung by swaging of the hollow end and fitting under a longitudinally applied compressive force. The compression force forms peripheral beads on the rung and fitting which interlock with each other. The rung assembly is secured to the siderail by any suitable fastening means such as rivets, bolts and the like which pass through the flange of the fitting and siderail.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: July 18, 1978
    Assignee: Shakespeare Company
    Inventors: George Robert Ruff, Danny O'Brian Derrick
  • Rung assembly for a ladder and a method of making the rung assembly
    Patent number: 4036325
    Abstract: The rung assembly is made of two piece construction and of metal while the siderail is made of a reinforced plastics material. The rung assembly includes a rung having a hollow end and a flanged fitting which is secured over the hollow end of the rung by swaging of the hollow end and fitting under a longitudinally applied compressive force. The compression force forms peripheral beads on the rung and fitting which interlock with each other. The rung assembly is secured to the siderail by any suitable fastening means such as rivets, bolts and the like which pass through the flange of the fitting and siderail.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: July 19, 1977
    Assignee: Shakespeare Company
    Inventors: George Robert Ruff, Danny O'Brian Derrick