| 摘要 |
A collapsible bicycle using union coupling assemblies attached to bisected frame bars and a bisected handlebar gooseneck which allow the bicycle frame to be separated into two sections and the handlebars to be removed. The union coupling assemblies consist of a threaded memeber, a flanged member, and a threaded collar securing the threaded member to the flanged member. The handlebar gooseneck coupling assembly is further provided with an interlocking key to prevent relative rotation of the upper and lower sections. The end portions of the bisected frame bars and the bisected handlebar gooseneck to be joined are fitted within the interior of the union coupling assemblies which have an internal recess comprised of a cylindrical surface area. In the preferred means of attachment, the union coupling assemblies are non-galvanized and have a close-tolerance sliding fit to the external diameter of the frame bars and the gooseneck stem to provide for optimum conditions for brazed connections using a silver-brazing alloy for the brazing filler material which is flowed into the space between the internal recess of the union coupling assemblies and the external diameter of the frame bars and the gooseneck stem.
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