Patents by Inventor Russell C. Crawford, III

Russell C. Crawford, III 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).

  • Well drilling apparatus and method of use
    Patent number: 9915113
    Abstract: Embodiments provide a well-drilling apparatus and a method of use.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: March 13, 2018
    Inventor: Russell C. Crawford, III
  • WELL DRILLING APPARATUS AND METHOD OF USE
    Publication number: 20170114600
    Abstract: Embodiments provide a well-drilling apparatus and a method of use.
    Type: Application
    Filed: August 5, 2016
    Publication date: April 27, 2017
    Inventor: Russell C. Crawford, III
  • Door drilling Kelly
    Patent number: 4448267
    Abstract: This is a device for reverse flow drilling of water wells, elevator ram holes and other holes. It is constructed of a hollow metal tubing with doors to allow for the discharge of excavated materials. In operation the Kelly (drill stem) is rotated into the ground and an airlift is used to bring cuttings into the drill stem and then out the doors. The doors are usually hand opened and hand closed and are locked by turning the door locks with a wrench or other tool. As the Kelly is rotated into the ground each door is opened for discharge and then closed before submergence into the drilling fluid.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: May 15, 1984
    Inventors: Russell C. Crawford, III, George M. Crawford, Russell C. Crawford, Jr.
  • Coffee filter with flow diverter
    Patent number: 4353484
    Abstract: This invention relates to filters for the brewing of coffee. Specifically to the fast brewing drip type suitable for home use. The basis of the invention is in the addition of a diverting valve to allow for the transfer of brewed coffee away from the holding pot and into the users coffee cup. This is to be done without interrupting the brewing cycle or placement of the coffee pot.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: October 12, 1982
    Inventor: Russell C. Crawford, III
  • Variable cross section V-belt
    Patent number: 4324147
    Abstract: My invention relates to a method of power transmission using a new type belt drive. This belt drive will supply both axial motion with a speed reduction or increase and will also change a rotative force into a reciprocating force. All of this would be accomplished by a special flexible V-belt and special pulleys.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: April 13, 1982
    Inventor: Russell C. Crawford, III