Bicycle chainring fastener system
OwnerGarrett Andrew Smithinventor
Life of this patent
Estimating the term…
Abstract
A fastener system for attaching bicycle chainrings to a bicycle crank comprised of a nut and a bolt. Both the nut and bolt consist of shafts with flanges on one end. The nut has threads formed on the interior of its shaft, while the bolt has threads formed on the exterior of its shaft. The nut and bolt can thus be threadedly engaged with each other to clamp the chainrings to the crank. Both the nut and bolt contain tool engagement interfaces formed on the interior of their respective shafts.
Claims12
A fastener system for attaching a chainring to a bicycle crank, comprising:
- a nut comprising of an internally threaded cylinder, an external flange on one end of said cylinder, and a tool interface means formed inside said cylinder;
- a bolt that threadedly engages said nut, comprising of an externally threaded shaft, a flange on one end of said shaft, and a tool interface means formed inside said shaft;
- whereby said bolt and said nut tighten together to clamp a chainring to a bicycle crank support arm.
A fastener system for attaching a plurality of chainrings to a bicycle crank, comprising:
- a nut comprising of an internally threaded cylinder, an external flange on one end of said cylinder, and a tool interface means formed inside said cylinder;
- a bolt that threadedly engages said nut, comprising of an externally threaded shaft, a flange on one end of said shaft, and a tool interface means formed inside said shaft;
- whereby said bolt and said nut tighten together to clamp a plurality of chainrings to a bicycle crank support arm.
A bicycle crank assembly comprising:
- a crank arm;
- chainring support means attached to said crank arm;
- one or more chainrings attached to said chainring support means by a nut and bolt system;
- said nut comprising of an internally threaded cylinder, a external flange on one end of said cylinder, and a tool interface means formed inside said cylinder;
- said bolt comprising of an externally threaded shaft that threadedly engages with said nut, a flange on one end of said shaft, and a tool interface means formed inside said shaft;
- whereby said nut and said bolt tighten together and fixedly clamp said chainrings to said chainring support means.
A bicycle with a crank assembly comprising:
- a crank arm;
- chainring support means attached to said crank arm;
- one or more chainrings attached to said chainring support means by a nut and bolt system;
- said nut comprising of an internally threaded cylinder, a external flange on one end of said cylinder, and a tool interface means formed inside said cylinder;
- said bolt comprising of an externally threaded shaft that threadedly engages with said nut, a flange on one end of said shaft, and a tool interface means formed inside said shaft;
- whereby said nut and said bolt tighten together and fixedly clamp said chainrings to said chainring support means.
Dependencies are inferred from the claim text.