Importance

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Abstract

A light-weight bicycle crown includes a horizontal unitary body member having in longitudinal vertical cross-section an arched generally inverted U-shaped configuration including a center portion, a pair of generally downwardly extending leg portions, and a pair of end portions integral with the lower ends of the leg portions, respectively, the center portion containing a vertical center through bore for receiving the bicycle steering shaft, and the end portions containing vertical end through bores on opposite sides of the center bore for receiving the stanchions of the front fork shock absorber means, respectively, characterized by the provision of lightening bores that extend from the end bores longitudinally within the leg portions, respectively, the end bores terminating in closed end walls adjacent the center through bore. Preferably, the end walls of the lightening bores are concave, the lightening bores have an elliptical cross-sectional configuration, and the thickness of the crown leg portion surrounding each lightening bore is constant, thereby to achieve maximum structural strength with a minimum of total crown weight.

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First Claim