Circular boomerang

Details Circular boomerang Circular boomerang

1980-05-12

1982-07-06

Shapiro, Paul E.

Amusement devices: games

Problem eliciting response

A63B 6508

Patent

active

043379508

ABSTRACT:
A toy boomerang is provided in the form of a generally flat circular body having a plurality of spiral arms extending between a central hub and an outer annulus. Each spiral arm defines an airfoil providing lift to the toy when it is spun through the air. The toy is used by spinning it into the air by a swinging, snapping movement of the arm and wrist whereupon the toy will follow a rising straight trajectory to a stall point and then reverse its direction and return directly back to the thrower.

REFERENCES:
patent: 692608 (1902-02-01), Bristow
patent: 862094 (1907-07-01), Morton
patent: 2035629 (1936-03-01), Wing
patent: 2324022 (1943-07-01), Prause, Jr.
patent: 2972481 (1961-02-01), Shapiro
patent: 3082572 (1963-03-01), Knox, Jr.
patent: 3955817 (1976-05-01), Davis
patent: 4045029 (1977-08-01), Katzmark

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