US 12,403,571 B2
Torque wrench with strain gauges
Minglin Shi, Shanghai (CN); Henglian Luo, Shanghai (CN); and Cheng Yang, Shanghai (CN)
Assigned to APEX BRANDS, INC., Apex, NC (US)
Appl. No. 17/912,074
Filed by Apex Brands, Inc., Apex, NC (US)
PCT Filed Mar. 25, 2020, PCT No. PCT/CN2020/081207
§ 371(c)(1), (2) Date Sep. 16, 2022,
PCT Pub. No. WO2021/189326, PCT Pub. Date Sep. 30, 2021.
Prior Publication US 2023/0182272 A1, Jun. 15, 2023
Int. Cl. B25B 23/142 (2006.01); B25G 1/04 (2006.01)
CPC B25B 23/1427 (2013.01) [B25B 23/1425 (2013.01); B25G 1/043 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A torque wrench comprising:
a drive head configured to engage with a tool for rotating a fastener, the drive head having a drive axis about which the drive head rotates when rotating the fastener;
a deflection member coupled to the drive head;
an outer body coupled to the deflection member at a first loading point and a second loading point;
a first strain gauge coupled to the deflection member between the drive head and the first loading point; and
a second strain gauge coupled to the deflection member between the first loading point and the second loading point.