Rotating playground equipment assembly
US4877236A · kind A · utility
7Cited by
13References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1984 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Dec 14, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63G1/12
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A rotating user-propelled playground equipment assembly or whirl including an equipment support base, a spindle secured to the support base, a rotatable platform assembly supported at least in part by the support base. The rotatable platform assembly includes a hub assembly rotatable about the spindle. A pressure wheel is positioned to constantly rollingly engage the hub assembly. A compression spring urging mechanism is connected to the pressure wheel and urges the pressure wheel into rolling engagement with the hub assembly and thereby automatically retards the rotation of the rotatable platform assembly about the spindle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.