Helical tube recreational component

Details Helical tube recreational component Helical tube recreational component

1996-06-05

1998-01-27

Apley, Richard J.

Exercise devices

Gymnastic

Play area climbing or traversing arrangement

D21242, 482 36, A63B 900

Patent

active

057117446

ABSTRACT:
A one-piece helical tube component for use in forming spiral or helical playground units is disclosed. The helical tube component includes an interconnected series of helical tube segments each having a constant predetermined diameter and slope. Complementary male and female tube segments are provided adjacent opposite ends of the interconnected series of helical tube segments for corresponding mating engagement with complementary male and female tube segments of another similarly formed helical tube component.

REFERENCES:
patent: D291717 (1987-09-01), Brooks
patent: 1630588 (1927-05-01), Sperry
patent: 2823703 (1958-02-01), Nusser
patent: 3565226 (1971-02-01), Winchester
patent: 3755878 (1973-09-01), Henning
patent: 3814418 (1974-06-01), Henning
patent: 3895796 (1975-07-01), Pestalozzi
patent: 4379551 (1983-04-01), Ahrens
patent: 4384594 (1983-05-01), Moritz

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