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US 4,728,113 AGranted
Pipe connector for a tubular frame bicycle
AssigneeAlfred Thun & Co. GmbH
InventorAlfred Thun, Jr.
Life of this patent
Estimating the term…
Abstract
A tubing connector for a tubular frame of a bicycle comprises a plurality of hemispherical mounting pieces protruding radially exteriorly from the tubing connector. These hemispherical mounting pieces are positioned on the tubing connector so that each of the ends of the tubes of the tubing frame can be engaged on one of the mounting pieces and attached thereto for example by welding. Using hemispherical instead of cylindrical mounting pieces allows the same tubing connector to be used in many different tubing frames having different tubing diameters and tubing angles.
Claims2
A tubing assembly for a bicycle frame, comprising:
- a tubular metal connector formed with a cylindrical wall and a plurality of spaced apart hemispherical bulges protruding radially exteriorly from said cylindrical wall;
- respective tubes adapted to define said frame and each having an end closely fitted over and wholly receiving a respective one of said bulges whereby an end face of each tube substantially meets said cylindrical wall at a base of the respective bulge, whereby each of said hemispherical bulges is wholly received in a respective one of said tubes;
- and
- respective circular weld seams welding each end face to said wall at the base of the respective hemispherical bulge.
1 more element
Dependencies are inferred from the claim text.