Helical monorail ramp for a pinball game
US5358241A · kind A · utility
124Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Oct 12, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2007/3666
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The ramp consists of a wire rail formed as a helix. The rail extends between a first elevation where the ball enters the ramp to a second, lower elevation where the ball exits the ramp. A straight rail extends through the center of the helical rail for the length thereof. The helical rail is dimensioned such that the distance between it and straight rail is less than the diameter of the ball. As a result, the ball will contact both the straight rail and helical rail simultaneously as it rolls down the helical rail by the force of gravity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.