Patents by Inventor Ronald L. Bach

Ronald L. Bach 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: 5143153
    Abstract: A sucker rod lifting apparatus (10) for use with downhole rotary oil well pumps having a pump rotor (42) disposed within a pump stator (44) comprises at least one hydraulic cylinder (16) between a first carrier plate (14) and the ground, a fluid circuit (82, 84) connected to the hydraulic cylinder (16) to raise and lower the first carrier plate (14) with respect to the ground, and a control valve (76) in the fluid circuit to selectively control the flow of fluid. Thus, the control valve (76) is capable of selectively controlling the raising and lowering of the first carrier plate (14) with respect to the ground to thereby selectively raise and lower the sucker rod (40) and the pump rotor (42) with respect to the pump stator (44).
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: September 1, 1992
    Inventors: Ronald L. Bach, Richard G. Bach