Patents by Inventor J. D. Ditson

J. D. Ditson 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).

  • Preselected releasable threaded coupling member
    Patent number: 4063837
    Abstract: A method for cutting continuous non-symmetrical threads on a cylindrical workpiece by a modified process of thread whirling. Variations of the thread form are accomplished by skewing the axis of the whirling tool relative to the axis of the cylindrical workpiece and the whirling axis offset. One practical form of resulting thread is of the reverse buttress type useful for drill rod steel.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: December 20, 1977
    Assignee: Ingersoll-Rand Company
    Inventor: J. D. Ditson
  • Method for forming threads
    Patent number: 4016801
    Abstract: A method for cutting continuous non-symmetrical threads on a cylindrical workpiece by a modified process of thread whirling. Variations of the thread form are accomplished by skewing the axis of the whirling tool relative to the axis of the cylindrical workpiece and the whirling axis offset. One practical form of resulting thread is of the reverse buttress type useful for drill rod steel.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: April 12, 1977
    Assignee: Ingersoll-Rand Company
    Inventor: J. D. Ditson