Playground junction ball
US5540636A · kind A · utility
10Cited by
18References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Apr 8, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2208/12
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A junction ball for connecting two passageways in a modular playground at any desired angle utilizing two rotatably interlocking hollow half spheres having one access port each. The halves are adapted to be fitted together, rotated to produce the proper angle, and locked into place. A single half may be used for terminating a passageway in conjunction with a viewing dome. The modular half spheres are preferably molded in one piece from plastic. The spherical view port is preferably constructed from polycarbonate. These components are supported by and mounted into a standard pipe structure consisting of pipe and assorted clamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.