Novelty dart with foam suction cup
US8012049B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jul 2, 2008 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Aug 31, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B6/003
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A projectile device having a suction cup head made of a novel foam. The foam used in the suction cup head has an open cell density within the foam of between five percent and twenty percent. The suction cup head has a face surface of a first diameter. A shallow concavity is formed in the face surface. The concavity has nearly the same diameter as the face surface, however, the depth of the concavity is no more than one-tenth of that diameter. Furthermore, the face surface of the suction cup head is proportionally large, being at least twenty-five percent as wide as the entire projectile device is long. The combination of a large suction cup head, a shallow concavity and a soft, semiporous foam enables the suction cup head to adhere to both smooth surfaces and rough surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.