Quick release camming mechanism
AssigneeCrank Brothers, Inc.
InventorsCarl Winefordner, Frank Hermansen
Life of this patent
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Abstract
A quick release camming mechanism is used in a bicycle skewer that secures a hub to a fork. Whereas prior art quick release mechanisms have only a single lever, this mechanism has two independent levers. About half the force is required to independently push either lever closed as to push both levers closed simultaneously. Similarly, about half the force is required to open either lever individually as to open them simultaneously. A similar quick release camming mechanism also works well for a quick release seat post clamp with similar advantages. The present invention is not limited to use on bicycle components.
Claims11
A skewer for securing and unsecuring a wheel hub and a fork, comprising:
- a shaft configured to fit into a longitudinal opening of the wheel hub;
- a pin having an opening configured to engage a first end of the shaft;
- a first lever having a cam surface and an opening on one end and a lever portion on an opposite end, wherein the opening engages a first portion of the pin;
- a second lever having a cam surface and an opening on one end and a lever portion on an opposite end, wherein the opening of the second lever engages a second portion of the pin;
- and
- a liner having a curved surface engaging the cam surfaces of the first and second levers, wherein the first and second levers are independently rotatable about the pin and with respect to each other to move the liner for securing or unsecuring the wheel hub and the fork.
Dependencies are inferred from the claim text.