Patent · US Active

Torque wrench apparatus and method for making and breaking joints

US9546526B2 · kind B2 · utility

4Cited by

2References

8Claims

0Family size

Inventors

Xuejun Li · Shanghai, CN
Chen Liu · Beijing, CN
Jie Cui · San Jose, US

Key dates

Filing date	Aug 31, 2015
Grant date	Jan 17, 2017
Priority date	—
Expiry date	Aug 31, 2035

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B19/163
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A torque wrench apparatus comprises a top wrench, a bottom wrench, and a middle wrench. The top and bottom wrenches are configured such that either one of them rotates a first joint in a first direction, and the middle wrench is configured to rotate a second joint in a second direction opposite the first direction; or the top and bottom wrenches are configured such that either one of them immobilizes a first joint, and the middle wrench is configured to rotate a second joint in a first direction; or the middle wrench is configured to immobilize a first joint, and the top and bottom wrenches are configured such that either one of them rotates a second joint in a second direction opposite the first direction. A method for making and breaking joints with the apparatus is also introduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.