Finger hole insert for bowling balls
US4381863A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1981 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Jul 13, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0002
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
To augment the spin and lift imparted to a bowling ball as it leaves the hand of the bowler, there are mounted in the finger holes inserts having inwardly protuberant ridges at the rims thereof. The tips of the fingers are hooked around these ridges when the ball is gripped, and continue to be at least partially hooked therearound during release of the ball, so that there is sufficient force imparted to the ball during release to create improved spin and lift. There is provided on the inner ends of the inserts walls having central holes therethrough, for purposes of aiding insertion of the inserts, relieving air pressure, and permitting inspection at any time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.