Spiral cylinder toy
US4861309A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Jul 10, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F7/3622
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A cylindrical toy having a first and second half each defining a semi-cylindrical body. Each of the halves has secured to its inner surface a plurality of substantially semi-circular flat plates which define a spiral passage when the halves are connected. The cylindrical halves have a bottom portion and the bottom portion of one half includes a bottom guide disk. The second half includes a reinforcing plate which is spaced from and disposed parallel to the bottom portion of the second half to form a space which receives the guide disk of the first half in order to accurately position the two halves with respect to each other prior to their being connected together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.