Exercise devices – Gymnastic
Patent
1994-02-22
1998-02-03
Donnelly, Jerome
Exercise devices
Gymnastic
482148, 5453, A63B 6900
Patent
active
057138176
ABSTRACT:
A shock-displacing inflatable bag for use in balance games, recreation or exercise comprises a bag constructed of material that does not stretch or otherwise absorb shock. The bag is formed from a single sheet of material which is first joined at a set of opposite edges using a lap seam. The lap seam allows the bag to roll from side to side without restriction. The two open ends of the bag are then joined using sandwich seams. A valve is then mounted over a hole in the bag for purposes of inflation and deflation. Radio frequency heat sealing provides a method for creating strong, permanent seams which can withstand forces imparted to the bag. Denser vinyl coated, woven fabrics provide the best resistance to shock and stretch.
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Donnelly Jerome
Osterloth Gregory W.
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