The Overriding Problem When Putting
Eliminate Face-Angle Error

The problem is identified as face-angle error. A face-angle error of only three degrees will result in a missed 41-inch putt.
Eliminating the potential for having face-angle error is simple. Change the face of the putter so it does not wrap around the putter when it is either open or closed on contact with the golf ball. It’s like pool or billiards, where two round objects make contact and send one of the balls off on an intended direction. Can you imagine trying to play pool with a putter instead of a cue stick, it would be disaster from the start, and obviously as frustrating as some of the putts that are missed at very short distances.
The CURV™ putter is a convex radial surface that is not flat, and does not wrap around the golf ball when it is either slightly open or closed when making contact with the golf ball. The point of contact of the two round surfaces presents a non-tangential error in sending the golf ball off on the intended direction.

Putter and stroke mechanics
The repeatability and confidence a golfer gets with any putter is the use of good stroke mechanics in stroking the golf ball on the stroke line to the hole. A flat-faced putter requires that absolute squareness of the putter face to the line of the putt must be maintained. The CURV™ putter, while not requiring absolute squareness, requires the golfer to be conscious of the contact area of the putter when ball contact is made.
Stroke Mechanics
Stroke mechanics with the CURV™ is stroking the golf ball on the stroke line with a relative degree of precision contact of the putter’s “sweet spot area” with the golf ball. Stroking the ball outside this area will give a directional error. It is not a flat plane hitting the round golf ball which requires absolute squareness.
The “Sweet Spot”
The “sweet spot” on the CURV™ putter is not visible as it is not on a flat-faced putter. It is also significant that a flat-faced putter does not have a “sweet spot” for direction, only for the ball response to the weight distribution of the putter’s design. The “sweet spot” for the CURV™ putter is precise and it is available for the golfer to improve upon. The shorter the putt the larger the “sweet spot.” Conversely, the longer the putt the smaller the size of the “sweet spot.” It is the most significant element that the golfer can use to his or her advantage. It is also the most significant element that the golfer can definitely show improvement on.
The information below shows the size of the “sweet spot” as it relates to the distance of the putt. The significance of controlling the stroke of the putter to the ball with a contact point area of the putter surface becomes paramount to repeatable success. Until now, the only teaching philosophy has been to try and keep the putter face square to the line. You can be sloppy with a flat putter as long as it is square to the line, and keeping it square has been the problem from day one. The human being trying to maintain jig bore tolerances of perpendicularity of a flat plane to a round ball in a dynamic action is a matter of historical and hysterical record for all golfers.
| Distance of Putt | “Sweet Spot” North | “Sweet Spot” South | “Sweet Spot” Size |
|---|---|---|---|
| 18 inches | 1.134 | 1.134 | 2.268 |
| 24 inches | 0.945 | 0.945 | 1.89 |
| 40 inches | 0.568 | 0.568 | 1.135 |
| 5 feet | 0.378 | 0.378 | 0.756 |
| 10 feet | 0.189 | 0.189 | 0.378 |
| 20 feet | 0.095 | 0.095 | 0.189 |
| 40 feet | 0.047 | 0.047 | 0.095 |




