The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 2016
Filed:
Jun. 10, 2014
Snap-on Incorporated, Kenosha, WI (US);
Timothy D Tomlinson, Rowland Heights, CA (US);
Snap-on Incorporated, Kenosha, WI (US);
Abstract
A method for improving wear properties of a torque wrench includes electroplating one or more components of the torque wrench with zinc. In an aspect, one or more of an interior surface of a tube component, a surface of a secondary arm, a surface of a cam, and a surface of a pawl components may be electroplated with zinc. These components may interact to provide a click mechanism. For example, the pawl component may be seated between the secondary arm and the cam components, and the cam is adapted to move against a bias force when the secondary arm shifts the pawl in response to a preset torque level being achieved. The electroplated zinc layer provides a corrosion-resistant, softer and smoother surface for these components, and serves as a frictional reducer when the zinc oxidizes to form zinc oxide, which improves the accuracy life of the tool.