Speed up device for bicycle

Claim 1

In the known combination of a bicycle wheel that includes a rim, an axle and two sets of spokes extending from opposite ends of said axle outwardly toward said rim, the improvement which comprises: (a) at least two devices located within said rim, around said axle and between said two sets of spokes, (b) each said device including a pair of axe-shaped sheet members positioned in opposed relationship with each other with portions of said sheet members being joined together at their edge portions, and other portions of said sheet members being spaced apart with respect to each other, (c) the bottom edge of each sheet member being disposed adjacent the axle of the wheel, (d) the top edge of each sheet member being disposed adjacent the rim of the wheel, (e) each sheet member having spaced apart side edges that extend between said top and bottom edges, (f) the top edges of each pair of opposed sheet members being joined together so as to essentially form an elongated outer edge, (g) one of the two pairs of opposed side edges of each pair of opposed sheet members being joined together so as to form a leading side edge, (h) guide grooves located along the bottom edge of each sheet member, (i) a spacing member mounted in said guide grooves intermediate each pair of opposed sheet members, which spacing member is shaped so that when it is inserted in said guide grooves it causes one of said two pair of side edges of opposed sheet members to be spread apart with respect to each other, and causes the other of said two pair of side edges of opposed sheet members to converge with respect to each other, and (j) mounting means for securely mounting each said device in a position between said two sets of spokes, (k) each said device being widest near the axles, somewhat less wide near the rim and narrowest at a point intermediate the rim and said axle.