Anti-rotation surrogate bicycle top tube

摘要

A detachable top tube assembly includes inner and outer tube members telescopically received by one another. Each inner and outer tube member includes one or more of an elliptical cross-sectional shape or is arced along a longitudinal axis thereof to prevent rotation of the inner and outer tube members relative to one another. Each of a pair of yoke assemblies is disposed at opposite ends of the inner and outer tube members and include a rotatable gate assembly for opening and closing the yoke assemblies. A pair of spring biased members is provided for engagement with the rotatable gate assemblies to maintain the gate assemblies in a closed position. A pair of button covers is provided for depressably engaging each spring biased member so to allow the gate assemblies to be rotated relative to a respective inner and outer tube member.

主权项

1. A detachable surrogate top tube assembly for a bicycle comprising:
an inner tube member having an insert portion that is telescopically inserted within a receiving portion of an outer tube member, the insert and receiving portions each having a lengthwise centered longitudinal axis that is oriented substantially coincident, one with the other, in a retracted configuration; a first yoke non-rotatably coupled to a first end of the tube assembly; a second yoke non-rotably coupled to a second end of the tube assembly; a first gate assembly coupled to the first end of the tube assembly and having a first end, a second end and a pivot portion, wherein the first end and second end pivot about the pivot portion that is located between the first end and the second end; a second gate assembly coupled to the second end of the tube assembly and having a first end, a second end and a pivot portion, wherein the first end and second end pivot about the pivot portion that is located between the first end and the second end; the insert portion and the receiving portion each having a length; and the insert portion and the receiving portion each having a non-round cross-sectional shape running along a substantial entirety of their lengthwise centered longitudinal axes for a substantial entirety of their lengths with a sufficiently narrow clearance space therebetween such that rotation of the insert portion relative to the receiving portion is limited by abutting interference between an exterior surface of the inner tube member and an interior surface of the outer tube member; wherein the insert portion has a substantially uniform cross-sectional shape along a length thereof and the longitudinal axis centered therein is arc-shaped, and the receiving portion has a substantially uniform cross-sectional shape along a length thereof and the longitudinal axis centered therein is arc-shaped.