Patents by Inventor David Stuart Cramer

David Stuart Cramer 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).

  • System, method and apparatus for reducing shock and vibration in down hole tools
    Patent number: 9187997
    Abstract: A snubber for reducing shock and vibration in down hole tools includes a housing having an axis and a chamber. A piston is mounted in the chamber for axial movement therein. The piston includes a shaft extending therefrom to an exterior of the housing. An axial spring element is mounted between the piston and the housing. Both the piston and the chamber include non-cylindrical portions.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: November 17, 2015
    Assignee: GENERAL DOWNHOLE TECHNOLOGIES, LTD.
    Inventor: David Stuart Cramer
  • SYSTEM, METHOD AND APPARATUS FOR REDUCING SHOCK AND VIBRATION IN DOWN HOLE TOOLS
    Publication number: 20130206395
    Abstract: A snubber for reducing shock and vibration in down hole tools includes a housing having an axis and a chamber. A piston is mounted in the chamber for axial movement therein. The piston includes a shaft extending therefrom to an exterior of the housing. An axial spring element is mounted between the piston and the housing. Both the piston and the chamber include non-cylindrical portions.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 15, 2013
    Inventor: David Stuart Cramer