US Patent 7841258 Bicycle shift controller

A bicycle shift controller is provided with two independently operable levers that are operatively coupled to a cable take up member disposed in a base member configured to be mounted to a handlebar. The cable take up member rotates about a rotational axis for winding and releasing a control cable in response to pivotal movement of the levers. A first one of the levers has a first operating portion with a first operating surface and a second operating portion with a second operating surface. The second operating surface is angularly offset from the first operating surface about a first lever pivot axis of the first lever. The first and second levers pivot from a rest position to a shift position for rotating the cable take up member in opposite directions.