Manipulative amusement device
US4881738A · kind A · utility
Inventor
Key dates
| Filing date | Jan 11, 1989 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Jan 11, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F9/0869
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A manipulative amusement device that includes upper and lower plates parallel to and in coaxial alignment with and rotatable relative to each other, each plate having a pair of spaced collar pieces disposed on opposite sides of a plurality of openings disposed in the periphery thereof to define a plurality of coaxially disposed spaced pairs of collar members, and a plurality of cylinder assemblies each formed about a respective longitudinal axis and comprised of an even number of cylinder segments with each cylinder assembly having opposing ends adapted for being rotatably received by the pair of spaced coaxially aligned collar members for permitting rotation of the cylinder assemblies. Improvements include a knob portion having a generally cylindrical inner recess projecting axially from one plate with the other plate having an axial post projecting therefrom and adapted for insertion through a central aperture in the one plate and into the knob recess, and a spring loaded retainer assembly cooperating with the post and the interior recess of the knob member for biasing both plates into planar surface contact and permitting limited axial separation of the plates in response to out…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.