1985-06-24
1986-12-16
Hafer, Robert A.
Undertaking
A63B 7102, A63B 7116
Patent
active
046291822
ABSTRACT:
A tunnel formed of a thermoplastic film with an outside and inside surface with compressed air in between. The tunnel consists of end sections (20) connected by longitudinal sections (22) to support sections (24), each having openings therebetween, allowing communication for introducing the compressed air. A second embodiment is similar, except it utilizes helical shaped sections (34) formed in a round configuration. A polygon shaped center intersection (40) connects the tunnels together with hook and loop tape (28) bonded to each mating surface forming a matrix when used in conjunction with a plurality of tunnels and intersections. The hollow interior of the devices allow children at play to enter and crawl through while within the protective enclosure afforded by the invention.
REFERENCES:
patent: 903632 (1908-11-01), Tilyou
patent: 2830606 (1958-04-01), Daugherty
patent: 3110552 (1963-11-01), Voelker
patent: 4335545 (1982-06-01), Couch
Pneumatic Structures by Thomas Herzog, copyright 1976, pp. 70-71.
Rader Sandra B.
Rader Steven J.
Cota Albert O.
D'Arrigo Kathleen
Hafer Robert A.
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