Importance

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Abstract

A driving interconnection between two eccentrically rotating members for rotation at the same angular velocity about their respective axes without angular phase shift. The invention is adaptable to join an outer rotatable member to an inner one and is particularly useful for coupling the interior rotor and the external cam ring in certain types of positive fluid displacing devices. In one embodiment, the coupler comprises a central body with four outwardly extending arms. Two of the arms engage tightly fitting slots in the inner rotating member. The other two arms pass through clearance slots in the inner member and engage tightly fitting slots in the outer rotating member.

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First Claim