• Patent Title: Torque impact mitigator for power tong
  • Application No.: US16208760
    Application Date: 2018-12-04
  • Publication No.: US10597955B1
    Publication Date: 2020-03-24
  • Inventor: Truman R. Davis
  • Applicant: Truman R. Davis
  • Agent Daniel M. Cohn; Howard M. Cohn
  • Main IPC: E21B19/16
  • IPC: E21B19/16 F16F13/00
Torque impact mitigator for power tong
Abstract:
A torque impact mitigator including a housing assembly having a hydraulic cylinder. A piston is disposed within the hydraulic cylinder. A piston rod is mounted at a first end to the piston and having a second end extending out from the compression end. A compression spring is disposed between the piston and an end of the cylinder. A rod clevis is secured to the second end of the piston rod to compress the compression spring into a compressed state when the rod clevis is moved away from the cylinder and to release the compression spring into a relaxed state when the rod clevis is moved towards the cylinder. A plug is disposed within an upper end of the compression spring and having a bore extending therethrough to receive the piston rod. One or more bores are disposed through the piston to allow passage of hydraulic fluid into the hydraulic cylinder.
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