Adjustable thumb hole insert for bowling balls
US5536212A · kind A · utility
Inventor
Key dates
| Filing date | Nov 21, 1994 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0002
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An adjustable thumb hole insert for a bowling ball. A bowling ball having an oversized thumb hole has an adjustment cup positioned within it. The adjustment cup is tapered at the bottom and at the top. A thumb collet is positioned within the adjustment cup and has a generally cylindrical sidewall surrounding the thumb hole. The thumb collet is tapered at the bottom and at the top and is held in the over-sized thumb hole of the bowling ball. An adjustment screw is held in the bottom of the adjustment cup and when it is screwed downwardly it raises the adjustment cup which causes the thumb collet to squeeze inwardly, thereby reducing the inside diameter of the thumb hole. Conversely, when the adjustment screw is loosened, the inside diameter of the thumb hole increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.