Patent for New Shimano Derailleur Hanger Opens Up Multiple Possibilities
Shimano has filed a patent for a new derailleur hanger design that, quite frankly, has us scratching our heads. Along with a UDH-style solution for mounting a hanger to the dropout, this so-called “bracket apparatus” has a second forward mounting point that looks to mount a battery, or some other electronic device, from the inboard face of the chainstay.
More obviously unique to this derailleur hanger is the extra arm, if you will, that extends forward along the inboard face of the chainstay to a secondary mounting point. Here, the arm meets a component bracket to which what is likely a battery , and/or some kind of sensor or other electronic device, is mounted, and positioned on the underside of the stay.
In conjunction with this invention, Shimano is also working on multiple versions of a rear hub dynamo, wherein a generator located inside the rear hub takes the kinetic energy from rotation of the rear wheel and converts it into an electrical current. You can learn about the specifics of that in US Patent 20230037945 A1.
Regardless, a rear hub dynamo coupled to an electronic rear derailleur could make electronic shifting a more viable, possibly even more reliable solution for commuter bikes than it might otherwise be without such a self-charging solution. The ‘electronically decoupling’ hub would be configured to disengage its pawls in the event of potential pedal kickback events, in order to prevent the rider from experiencing undesirable rearward rotation of the cranks.
However, while the Fox Factory patent did a great job of explaining how these two components would work together to give that chainless ride feel, it didn’t go into much detail on the infrastructure requirements for such a setup. Namely, how exactly the hub and derailleur would be wired, or how they would be powered, even.
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