Patents Assigned to AMERICAN SINKER BARS
  • SINKER BAR
    Publication number: 20160369574
    Abstract: The sinker bar can have at least one pin with a shoulder that is at least 1.600 inches from the end of the pin to provide greater stability and easy make-up. The modified polished rod pin is capable of mating with a polished rod coupling.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 22, 2016
    Applicant: AMERICAN SINKER BARS
    Inventors: JOHN STOLT, JEFF DE LA PAZ, JOHNNY FAYO