Patent ID: 7056218

Claim:
An elastic shaft coupling comprising: a joint member formed with a hole; a hollow shaft member formed of a steel pipe received in the joint member; an elastic member interposed radially between the joint member and the hollow shaft member to flex and deform upon relative rotation between the joint member and the hollow shaft member; stopper portions provided, respectively, on the joint member and the hollow shaft member to restrict the relative rotation therebetween within a predetermined amount; and the stopper portions provided on said joint member each including a pair of stopper faces spaced from each other in a peripheral direction to form a gap therebetween, the stopper portions provided on said hollow shaft member each being radially outwardly projected into said gap formed between said stopper faces of the corresponding stopper portion provided on said joint member, said stopper portions on said hollow shaft member being formed by plastically processing an end of the hollow shaft member to be projected radially outwardly, and the stopper portions on said hollow shaft member being provided with ribs for reinforcement.