SANDRO FELTRIN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A crank arm is provided, which includes a first connecting member and a second connecting member used for joining the first connecting member. The first connecting member has a first wall surface, the first wall surface is provided with a joint wall of an annular structure, and a wall surface of the joint wall is a concave-convex surface. The second connecting member is provided with a second wall surface opposite to the first wall surface, an annular wall and two facing ribs extend from the second wall surface, and the annular wall and the ribs have a groove there-between for fitting the joint wall therein. Therefore, a contact area of the first connecting member and the second connecting member is increased, and a shear force resisting function is provided.
Abstract: A crank arm is provided, which includes a first connecting member and a second connecting member used for joining the first connecting member. The first connecting member has a first wall surface, the first wall surface is provided with a joint wall of an annular structure, and a wall surface of the joint wall is a concave-convex surface. The second connecting member is provided with a second wall surface opposite to the first wall surface, an annular wall and two facing ribs extend from the second wall surface, and the annular wall and the ribs have a groove there-between for fitting the joint wall therein. Therefore, a contact area of the first connecting member and the second connecting member is increased, and a shear force resisting function is provided.
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