Aerodynamic flying disc
US8784152B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2010 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Apr 7, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H33/18
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A toy projectile that has two parts, a cup shaped inner core having a top wall, an annular wall extending from the top wall to a bead adjacent to a bottom end, and an outer covering being somewhat donut shaped with a central opening, a top end, a bottom end, a lower recess, a curved exterior surface and a chamfer adjacent to the bottom end. The inner core is received in the central opening of the outer covering such that the top wall of the inner core is continuous with the top end of the outer covering. The bottom of the projectile may be open or covered. The projectile includes geometric aspect ratios that provide the projectile with excellent flight characteristics. The ratios are: projectile outer diameter to projectile height between 4:1 to 5.2:1; projectile outer diameter to core outer diameter between 1.20:1 to 1.45 to 1; projectile height to core bead height between 2.3:1 to 3.25:1; outer covering volume to inner core volume between 2.4:1 to 5.8:1; profile radius to projectile height between 0.5:1 to 0.8:1; and chamfer height to chamfer width between 2:1 to 6.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.