Dual-speed hub
阅读：295发布：2022-10-14
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1. A DUAL-SPEED HUB FOR A BICYCLE AND THE LIKE COMPRISING, IN COMBINATION: (A) A NORMALLY STATIONARY SHAFT HAVING AN AXIS; (B) A HUB SHELL ROTATABLE ABOUT SAID AXIS; (C) A DRIVER MEMBER MOUNTED ON SAID SHAFT FOR ROTATION ABOUT SAID AXIS; AND (D) A PLANETARY GEAR TRANSMISSION INTERPOSED IN SAID HUB SHELL BETWEEN SAID DRIVER MEMBER AND SAID HUB SHELL, SAID TRANSMISSION INCLUDING (1) A SUN GEAR FIXED ON SAID SHAFT AND DEFINING A RADIAL PLANE RELATIVE TO SAID AXIS, SAID DRIVER MEMBER BEING AXIALLY SPACED FROM SAID PLANE IN A PREDETERMINED DIRECTION; (2) A PLANET CARRIER ENGAGING SAID DRIVER MEMBER FOR JOINT ROTATION THEREWITH ABOUT SAID AXIS; (3) A RING GEAR ROTATABLE ABOUT SAID AXIS; (4) A PLANET GEAR ROTATABLE ON SAID PLANET CARRIER IN SAID PLANE IN SIMULTANEOUS MESHING ENGAGEMENT WITH SAID SUN GEAR AND SAID RING GEAR, WHEREBY THE ROTARY SPEED OF SAID RING GEAR IS HIGHER THAN THE ROTARY SPEED OF SAID PLANET CARRIER DURING ROTATION OF SAID DRIVER MEMBER; (5) A FIRST FREE-WHEELING COUPLING INTERPOSED BETWEEN SAID PLANET CARRIER AND SAID HUB SHELL, SAID FIRST COUPLING BEING AXIALLY POSITIONED BETWEEN SAID PLANE AND SAID DRIVER MEMBER; (6) A SECOND FREE-WHEELING COUPLING INTERPOSED BETWEEN SAID RING GEAR AND SAID HUB SHELL, SAID SECOND COUPLING BEING AXIALLY SPACED FROM SAID PLANE IN A DIRECTION OPPOSITE TO SAID PREDETERMINED DIRECTION; AND (E) OPERATOR CONTROLLED MEANS FOR SELECTIVELY DISENGAGING SAID SECOND COUPLING.
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