Patents by Inventor Jeffrey John Roberts

Jeffrey John Roberts 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).

  • Patent number: 7104343
    Abstract: A rod extractor for ground drill rods having a drill rod (20) with a plurality of rod threads (23) at its upper portion, about which an extraction collar (30) with internal threads rotates slidably with said rod threads. A guide sleeve (51) having a sleeve opening is attached perpendicular to a ground plate (50) which rests on a ground surface. Said rod travels through said sleeve opening into the ground, upon which an extraction tool (40) rotates said collar about said rod resulting in downward travel of said collar in relation to said rod and sleeve until said collar contacts said sleeve. Further rotation of said collar results in upward force upon said rod, extracting it from the ground.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: September 12, 2006
    Inventor: Jeffrey John Roberts
  • Publication number: 20040065476
    Abstract: A rod extractor for ground drill rods having a drill rod (20) with a plurality of rod threads (23) at its upper portion, about which an extraction collar (30) with internal threads rotates slidably with said rod threads. A guide sleeve (51) having a sleeve opening is attached perpendicular to a ground plate (50) which rests on a ground surface. Said rod travels through said sleeve opening into the ground, upon which an extraction tool (40) rotates said collar about said rod resulting in downward travel of said collar in relation to said rod and sleeve until said collar contacts said sleeve. Further rotation of said collar results in upward force upon said rod, extracting it from the ground.
    Type: Application
    Filed: October 4, 2002
    Publication date: April 8, 2004
    Inventor: Jeffrey John Roberts