Patents by Inventor Lloyd Walker

Lloyd Walker 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).

  • Swivelling device for a downhole rod pump
    Patent number: 7614446
    Abstract: A swivelling device is provided for picking up or backing off a drive string after it has been stuck in a down hole. The device allows the drive string to move longitudinally and rotate. The device has a shaft rotatably mounted in a housing so that the shaft can freely rotate but can not move radially or axially relative to the housing. A frame support is moveably connected to the housing and has an aperture that is attachable to a support system capable of lifting up the drive string. A pair of biasing mechanisms bias the housing towards the frame support. When a downward force is applied to the shaft by the drive string, the housing can be displaced downwards away from the support frame. Once the downward force ceases, the biasing mechanism moves the housing back towards the support frame.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: November 10, 2009
    Assignee: Topco Oilsite Products Ltd.
    Inventor: Lloyd Walker
  • Swivelling device for a downhole rod pump
    Publication number: 20070256866
    Abstract: A swivelling device is provided for picking up or backing off a drive string after it has been stuck in a down hole. The device allows the drive string to move longitudinally and rotate. The device has a shaft rotatably mounted in a housing so that the shaft can freely rotate but can not move radially or axially relative to the housing. A frame support is moveably connected to the housing and has an aperture that is attachable to a support system capable of lifting up the drive string. A pair of biasing mechanisms bias the housing towards the frame support. When a downward force is applied to the shaft by the drive string, the housing can be displaced downwards away from the support frame. Once the downward force ceases, the biasing mechanism moves the housing back towards the support frame.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 8, 2007
    Inventor: Lloyd Walker
  • Water craft
    Patent number: D309128
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 10, 1990
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Lloyd Walker, Masakazu Matsuzawa, Martin Manchester
  • Utility vehicle
    Patent number: D312227
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: November 20, 1990
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shiro Miyamoto, Lloyd Walker