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US 2026/0274367 A1Published application
Components for bamboo bicycle frames and methods for constructing bicycle frames using such devices
AssigneeBarefoot Citizens IP Pty Ltd
InventorsSimon Doble, Alex Chappell, Jason Smith
Life of this patent
Estimating the term…
Abstract
The present technology is generally directed to bicycle frame knuckles for use with bamboo frame tubes. In some embodiments, a bicycle frame knuckle can include: a cylindrical housing; a first tube lug extending from the housing and configured to extend into a first end portion of a first bicycle frame tube; and a second tube lug extending from the housing and configured to extend into an end portion of a second bicycle frame tube.
Claims20
A bicycle frame, comprising:
- a top tube, a down tube, a seat tube, a pair of chain stays, a pair of seat stays, and a pair of dropouts connecting the pair of chain stays with the pair of seat stays;
- a head tube knuckle, including:
- a cylindrical fork tube housing;
- a top tube lug extending from the fork tube housing and into a first end portion of the top tube;
- and
- a down tube lug extending from the fork tube housing and into a first end portion of the down tube;
- a bottom bracket knuckle, including:
- a cylindrical crank bearing housing;
- a seat tube lug extending from the crank bearing housing and into a first end portion of the seat tube;
- a down tube lug extending from the crank bearing housing and into a second end portion of the down tube;
- and
- a pair of chain stay lugs each extending from the crank bearing housing and into a corresponding one of the pair of chain stay tubes;
- and
- a seat tube knuckle, including:
- a cylindrical seat post housing extending into a second end portion of the seat tube;
- a top tube lug extending from the seat post housing and into a second end portion of the top tube;
- and
- a pair of seat stay lugs each extending from the seat post housing and into a corresponding one of the pair of seat stay tubes.
15 more elements
A bicycle frame knuckle, comprising:
- a cylindrical housing;
- a first tube lug extending from the housing and configured to extend into a first end portion of a first bicycle frame tube;
- and
- a second tube lug extending from the housing and configured to extend into an end portion of a second bicycle frame tube,
- wherein at least one of the first tube lug and the second tube lug includes at least one channel formed therein and extending at least partially along its length.
2 more elements
A bicycle frame fitting, comprising:
- a cylindrical housing;
- a first tube lug extending from the housing and configured to extend into a first end portion of a first bicycle frame tube;
- a pair of second tube lugs each extending from the housing and configured to extend into an end portion of a corresponding one of a pair of second bicycle frame tubes;
- and
- a pair of contoured reinforcement members positioned between the pair of second tube lugs and positioned to engage an outer surface of a corresponding one of the pair of second bicycle frame tubes.
2 more elements
Dependencies are inferred from the claim text.