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:
Nov. 13, 2012
Filed:
Dec. 24, 2009
Samuel Wai Keung Tsui, Perth, AU;
Samuel Wai Keung Tsui, Perth, AU;
Katun Corporation, Minneapolis, MN (US);
Abstract
A driving force member for receiving rotational driving force includes a base portion, a projection portion including three planar surfaces, the three planar surfaces arranged such that if they were extended and viewed in cross section perpendicular to the axis of the projection, they would intersect at 120 degrees in the form of an equilateral triangle, the three planar surfaces corresponding to a partial length of each side of the triangle respectively and offset from the center of each respective side of the triangle, and three joining portions joining each of the three planar surfaces, the three joining portions lying entirely within the equilateral triangle.