Mechanical guns and projectors – Projectile impelled by coacting wheels
Patent
1997-12-22
1999-10-12
Ricci, John A.
Mechanical guns and projectors
Projectile impelled by coacting wheels
F41B 304
Patent
active
059642092
ABSTRACT:
The volleyball service device of this invention includes; a base member for supporting the structure; a support member attached to the base member extending upwardly from the base member and forming an angle with the base member to extend increasingly over the center of gravity of the base member; a server head for propelling volleyballs forward; and a trolley attached to the server head to vertically reposition the server head relative to the support member. In a preferred embodiment the volleyballs are propelled forward by a plurality of rotating wheels.
REFERENCES:
patent: 4323048 (1982-04-01), Saito et al.
patent: 4325351 (1982-04-01), Yuasa
patent: 4561414 (1985-12-01), Nozato
patent: 4841945 (1989-06-01), Braden
patent: 5012790 (1991-05-01), Bates
patent: 5464208 (1995-11-01), Pierce
Hartman Charles
Ricci John A.
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