Booster apparatus for speed-change and gearshift of bicycle

Application Number: 00108154
Application Date: 2000.04.29
Publication Number: 1297832
Publication Date: 2001.06.06
Priority Information: 1999/11/30 US 09/452724
International: B62M25/02
Applicant(s) Name: Shimano Inc.
Inventor(s) Name: Fujii Kazuako;Kusumitsu Yoshioki
Patent Agency Code: 72001
Patent Agent: cai minjun
Abstract An assisting apparatus that uses power from a rotating member to assist the operation of a bicycle transmission includes a mounting member; a cam member coupled to the mounting member for rotation around a cam axis;a cam follower cooperating; a transmission actuating element coupling member for communicating movement of the cam follower to a transmission actuating element; a first coupling member coupled for rotation of the cam member, wherein the first coupling member moves between a first engaged position and a first disengaged position; an operating member for moving the first coupling member to the first engaged position; and a decoupling member that moves the first coupling member to the first disengaged position in response to a rotational position of the cam member.