Boomerang for sport
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United States of America Patent
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Dec 9, 2003
Grant Date -
N/A
app pub date -
Feb 12, 2003
filing date -
Feb 12, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A boomerang is made from a flat sheet material, and includes a plurality of blades connected to a central body by a plurality of interconnecting portions, and angularly displaced from one another about a center point. Each blade includes leading and trailing edges that are symmetrical relative to a middle line. Each interconnecting portion extends along a radial axis which intersects the middle line to form an obtuse included angle therewith. Each blade has a bent line that is positioned between the middle line and the trailing edge thereof, and cooperates with the trailing edge to define a bent portion which faces towards the leading edge and which forms an obtuse included angle with a horizontal plane. Varying the position of the bent lines and the included angles of the bent portions can change flight patterns and flight range of the boomerang.
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