Dual speed hub

Claim 1

DUAL SPEED HUB FOR BICYCLES AND LIKE VEHICLES, COMPRISING (A) A STATIONARY SHAFT HAVING AN AXIS, (B) A DRIVER MEMBER ROTATABLE ABOUT SAID SHAFT IN FORWARD AND BACKWARD DIRECTIONS, (C) A HUB SHELL SUPPORTED TO EXTEND COAXIALLY WITH SAID SHAFT FOR ROTATION ABOUT SAID AXIS IN SAID FORWARD AND BACKWARD DIRECTIONS, AND (D) POWER TRANSMISSION ELEMENTS ENGAGEABLE TO FORM A POWER TRANMISSION TRAIN BETWEEN SAID DRIVER MEMBER AND SAID HUB SHELL, SAID ELEMENTS INCLUDING (1) PLANETARY GEARING MEANS HAVING A GEAR MEMBER, (2) A SPEED-CHANGING MEMBER MOVABLE IN AXIAL DIRECTION RELATIVE TO SAID GEAR MEMBER, (3) A COUPLING MEMBER, (4) AN INTERIOR DRIVER MEMBER, (5) A FACE ON EACH OF SAID GEAR MEMBER AND SAID SPEED-CHANGING MEMBER, SAID FACES ENGAGING EACH OTHER AND ROTATING JOINTLY DURING FORWARD ROTATION OF SAID DRIVER MEMBER, (6) SAID GEAR MEMBER AND THE FACE THEREON CAUSING AXIAL MOVEMENT OF SAID SPEED CHANGING MEMBER DURING BACKWARD ROTATION OF SAID DRIVER MEMBER AND THUS CAUSING SAID SPEED-CHANGING MEMBER AND THE FACE THEREON TO ASSUME A DISENGAGED POSITION, SAID COUPLING MEMBER BEING TAKEN ALONG BY SAID SPEED-CHANGING MEMBER WHEN THE LATTER IS AXIALLY MOVED, AND (7) DRIVING MEANS IMMEDIATELY ACTING UPON SAID HUB SHELL, THE POWER TRANSMISSION TRAIN BEING FORMED, DEPENDING ON THE POSITION OF SAID SPEEDCHANGING MEMBER AND OF THE FACE THEREON, EITHER BY SAID DRIVER MEMBER, SAID COUPLING MEMBER, SAID INTERIOR DRIVER MEMBER, AND SAID DRIVING MEANS, OR BY SAID DRIVER MEMBER, SAID PLANETARY GEARING INCLUDING SAID GEAR MEMBER, SAID COUPLING MEMBER, SAID INTERIOR DRIVER MEMBER, AND SAID DRIVING MEANS.