Magnetically responsive bowling pins
US5660596A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jun 21, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63D9/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A magnetically responsive bowling pin having a first upwardly open cavity in its head portion and a second elongated cavity smaller and cross-section and extending downwardly in the head portion of a bowling pin. The first cavity receives a plastic cap having a top portion and a skirt with a permanent magnet and a plastic plug disposed in press fit engagement within the skirt. The skirt in turn is in press fit engagement with the wall of the first cavity to retain the assembled magnet and plastic parts in the desired position in the cavity. The second elongated cavity serves to remove material from the body of the bowling pin and thus compensates for the added weight of the permanent magnet and the slight additional weight of the plastic cap and plastic plug. As a result, the desired weight, weight distribution and balance of the bowling pin is not disturbed. In a second embodiment, the plastic cap has a through opening accessible upwardly and a small steel cap is mounted within the plastic cap and is exposed upwardly through the opening. The cap is also in engagement with the permanent magnet and results in enhancement of the magnetic forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.