Games using tangible projectile – Playing field or court game; game element or accessory... – Means for dividing field or court into compartments; element...
Reexamination Certificate
2001-06-25
2002-10-08
Sewell, Paul T. (Department: 3711)
Games using tangible projectile
Playing field or court game; game element or accessory...
Means for dividing field or court into compartments; element...
Reexamination Certificate
active
06461258
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention is a portable system for supporting volleyball net the like.
Prior art that I know of includes the following U.S. patents:
3,940,139-Barnes
4,009,780-Frye
4,720,112-Stettner
4,732,395-Halverson
4,830,382-Wheeler
4,968,042-Stewart
4,973,059-Stewart
5,156,408-Hall
5,176,344-Eberhard
5,215,310-Allbright
5,238,251-Staka
5,269,533-Kellams
5,344,157-McCord
5,358,257-Pardi
5,651,552-Whelchel
5,816,956-Ellis
5,885,176-Wong
5,951,417-Ha
6,030,301-Asada.
U.S. Pat. No. 4,009,780—Fry and U.S. Pat. No. 5,176,344—Eberhard appear to be the most relevant of these. They both disclose portable net systems, removably “implantable”, with spring means to tension the net.
SUMMARY OF THE INVENTION
In summary, this invention is a net system for volleyball, badminton, and the like. It includes first and second piers and a net with top and bottom supporting cables extending between the piers. The piers each include a base, net pole, and net tensioning spring. The bases each include longitudinal and lateral platform members, and a ground anchor. Each net pole is removably attached to its base and extends up from it. The net tensioning springs are cantilevered leaf springs, each removably attached to its base and extending up and away from its net pole. The net supporting cables pass through the net poles for attachment to the springs. The springs are flexible toward and away from their net poles in the plane of the net.
REFERENCES:
patent: 3195898 (1965-07-01), Respini
patent: 4009780 (1977-03-01), Frye
patent: 4274632 (1981-06-01), Jacobs
patent: 5176344 (1993-01-01), Eberhard
Bird Robert J.
Chambers M.
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