Drive mechanism for gerotor gear set

Claim 1

A DRIVE MECHANISM COMPRISING RELATIVELY STATIONARY FRAME MEANS, A GENERALLY ANNULARLY SHAPED INTERNALLY TOOTHED RING ELEMENT HAVING AN AXIS IN FIXED RELATION TO SAID FRAME MEANS, AN EXTERNALLY TOOTHED STAR ELEMENT HAVING AT LEAST ONE TOOTH LESS THAN SAID RING ELEMENT AND HAVING AN AXIS, SAID STAR ELEMENT BEING DISPOSED ECCENTRICALLY IN SAID RING ELEMENT FOR ORBITAL MOVEMENT ABOUT THE AXIS OF SAID RING ELEMENT AND ROTATIONAL MOVEMENT ABOUT ITS OWN AXIS IN THE OPPOSITE DIRECTION FROM AND AT A SLOWER SPEED THAN SAID ORBITAL MOVEMENT DURING RELATIVE MOVEMENT BETWEEN SAID ELEMENTS, FIRST AND SECOND ROTATABLE MEMBERS SUPPORTED BY SAID FRAME MEANS FOR ROTATION AROUND SAID RING ELEMENT AXIS, SHAFT MEANS EXTENDING BETWEEN SAID STAR ELEMENT AND SAID FIRST ROTATABLE MEMBER, SAID SHAFT MEANS HAVING AN AXIS WHICH INTERSECTS SAID AXES OF SAID RING AND STAR ELEMENTS, UNIVERSAL JOINT MEANS FOR RESPECTIVELY CONNECTING SAID FIRST ROTATABLE MEMBER AND SAID STAR ELEMENT TO SAID SHAFT MEANS TO PROVIDE FOR ROTATIONAL MOVEMENT OF SAID FIRST ROTATABLE MEMBER IN SYNCHRONISM WITH SAID ROTATIONAL MOVEMENT OF SAID STAR ELEMENT, SAID SECOND ROTATABLE MEMBER HAVING A RADIALLY EXTENDING SLOT WITH WALLS EXTENDING PARALLEL TO SAID RING ELEMENT AXIS, SAID SHAFT MEANS INCLUDING A SHAFT PORTION WHICH IS COAXIAL RELATIVE TO SAID SHAFT MEANS AXIS AND EXTENDS INTO SAID SLOT TO PROVIDE ROTATIONAL MOVEMENT OF SAID SECOND ROTATABLE MEMBER IN SYNCHRONISM WITH SAID ORBITAL MOVEMENT OF SAID STAR ELEMENT, SAID SHAFT PORTION HAVING A TRANSVERSE DIMENSION SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID SLOT AND BEING ROTATABLE RELATIVE TO EITHER SAID SHAFT MEANS AXIS OR TO SAID ROTATABLE MEMBER OR BOTH.