Brake disk for bicycle

Application Number  00129477 Application Date  2000.12.28
Publication Number  1307997 Publication Date  2001.08.15
Priority Information   1999/12/29 US 09/474692  
Applicant(s) Name  Shimano Inc.  
Inventor(s) Name  Naai Taisuke;Matsui Hasashi  
Patent Agency Code  72001 Patent Agent  zeng xiangling
AbstractA one-piece brake disk for a vehicle includes a radially inner annular portion having a plurality of circumferentially located mounting holes defining a mounting circle; a radially outer annular portion concentric with the radially inner annular portion and having opposite braking surfaces; and a plurality of connecting arms extending from an inner peripheral surface of the radially outer annular portion to an outer peripheral surface of the radially inner annular portion. Each of the plurality of connecting arms is tangent to an effective circle concentric with the mounting circle, wherein the effective circle has a radius greater than a radius of the mounting circle.