Golf clubs with integral alignment indicia
US5158297A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1990 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Dec 17, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B69/3632
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Golf clubs are disclosed that exhibit at least one marking indicia on the surface of the shaft and extending along at least one of the lateral sides of the shaft. The marking indicia is preferably a series of lines that are parallel to the edge of the shaft and separated by a distance sufficient to be revealed or hidden as the club face is opened or closed by small angular increments. Golf shafts according to the invention include: PA1 a shaft having a circular cross section and comprising (a) a tip end for attaching a club head to the shaft, (b) a butt end for attaching a grip to the shaft, and (c) at least one linearly oriented first alpha marking indicia positioned on the exterior of the shaft within an angle, .alpha., about 45.degree. to about 135.degree. from a clockwise position relative to top dead center of the shaft and extending up the shaft away from the tip end for a distance sufficient to allow a golfer to view the marking indicia and discern an angular position of the club face of up to about 15.degree. relative to a square alignment. The present invention provides a shaft having alignment indicia that are convenient and reproducibly used to produce a square, slice, o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.