Boomerang

Details Boomerang Boomerang

2006-02-14

2006-02-14

Wong, Steven (Department: 3711)

Games using tangible projectile

Projectile, per se; part thereof or accessory therefor

Boomerang

Reexamination Certificate

active

06997828

ABSTRACT:
A boomerang includes a central disk comprised of concentric inner and outer rings that are connected by radially extending connection sections. Wings radially extend from an outer circumference of the outer ring, corresponding in position to the connection sections. The inner ring defines a central bore. Arc openings are formed between the inner and outer rings and delimited by the connection sections. Aligned openings are defined in each wing and the associated connection section. Tabs extend from edges of the openings in opposite directions and also incline in opposite directions. Further tabs are formed on and extend from an inner circumference of the outer ring. When the boomerang flies, the central bore, the arc openings, and other openings allow airflow to pass therethrough, while the tabs impose constraints to the airflow to induce stable and extended flying of the boomerang in the air.

REFERENCES:
patent: 862094 (1907-07-01), Morton
patent: 5259802 (1993-11-01), Yang
patent: 5816879 (1998-10-01), Kyame

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