Invention Grant
- Patent Title: Universal anti-torque screwdriver head structure
- Patent Title (中): 通用抗扭矩螺丝刀头结构
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Application No.: US13454046Application Date: 2012-04-23
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Publication No.: US08770070B2Publication Date: 2014-07-08
- Inventor: Tsai-Fa Liu
- Applicant: Tsai-Fa Liu
- Main IPC: B25B15/00
- IPC: B25B15/00

Abstract:
The present invention discloses a universal anti-torque screwdriver head structure integrally formed and divided into a polygonal insert end and a conical action end, and comprising a plurality of pull-push wings disposed around the action end, a stepped recessed formed between two adjacent pull-push wings and extended inwardly from an open end, and the recess having a longitudinal depth slightly greater than an action hole of a screw of a general specification, and the design of the stepped recess provides high-strength torque and tenacity and fits screws of various different specifications.
Public/Granted literature
- US20130276595A1 UNIVERSAL ANTI-TORQUE SCREWDRIVER HEAD STRUCTURE Public/Granted day:2013-10-24
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