# Patent

## Title
Hybrid golf club head

## Abstract

A hybrid type golf club head is disclosed herein. The hybrid golf club head preferably has an exterior heel weight, an exterior toe weight, and interior sole weight and a stainless steel body. The hybrid golf club head preferably has a moment of inertia Ixx about a center of gravity ranging from 2100 to 2300 grams-centimeters squared.

## Background
CROSS REFERENCES TO RELATED APPLICATIONS
The Present Application claims priority to U.S. patent application No. 61/245,612, filed on Sep. 24, 2009, which is hereby incorporated by reference in its entirety.


STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a hybrid golf club head.
2. Description of the Related Art
The prior art discloses many hybrid golf club heads.
The inventors wanted a hybrid that could play like an iron in the fairway and perform better from the rough. The inventors didn't like how the current hybrids would tend to hit “fliers” from the rough and lose backspin.
The inventors also wanted the golf club to slide easily through the grass and play from a variety of lies and face angles.
These features were not available in current hybrid golf clubs.
BRIEF SUMMARY OF THE INVENTION
In order to provide a hybrid with the desired qualities, the inventors moved the center of gravity forward and higher to give a trajectory more like an iron.
The inventors also designed the sole with exterior sole weights.
One aspect of the present invention is a hybrid golf club head. The hybrid golf club head includes a body comprising a crown section, a sole section and a face section. The hybrid golf club head also includes an exterior heel weight and an exterior toe weight, both positioned on the sole section. The exterior heel weight has a mass ranging from 5 to 10 grams. The exterior toe weight has a mass ranging from 5 to 10 grams. The hybrid golf club head also includes an interior weight chip positioned near the face section. The interior weight chip has a mass ranging from 4 to 8 grams. The hybrid golf club head has a moment of inertia Izz about a center of gravity ranging from 2000 to 3000 grams-centimeters squared. The hybrid golf club head has a moment of inertia Ixx about a center of gravity ranging from 1900 to 2500 grams-centimeters squared. The hybrid golf club head has a loft angle ranging from 18 degrees to 28 degrees. The hybrid golf club head has a volume ranging from 100 to 150 cubic centimeters. The hybrid golf club head has a mass ranging from 210 grams to 240 grams.
Having briefly described the present invention, the above and further objects, features and advantages thereof will be recognized by those skilled in the pertinent art from the following detailed description of the invention when taken in conjunction with the accompanying drawings.



BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a bottom plan view of a hybrid golf club head.
FIG. 2 is a top plan view of the hybrid golf club head of FIG. 1.
FIG. 3 is a front elevational view of the hybrid golf club head of FIG. 1.
FIG. 4 is a bottom plan view of the hybrid golf club head of FIG. 1.
FIG. 5 is a rear elevational view of the hybrid golf club head of FIG. 1.
FIG. 6 is toe end side view of the hybrid golf club head of FIG. 1.
FIG. 7 is a heel end side view of a hybrid golf club head.
FIG. 8 is an exploded view of a hybrid golf club head with a pair of weights detached from the hybrid golf club head.
FIG. 9 is a top plan view of the hybrid golf club head illustrating a composite crown.
FIG. 10 is a top plan view of the hybrid golf club head with a carbon composite crown removed to illustrate the interior of the hybrid golf club head including an interior weight chip.
FIG. 11 is a cross-sectional view of the hybrid golf club head illustrating the interior of the hybrid golf club head including an interior weight chip.



DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1-11, the hybrid golf club head 20 has a body 21, a crown section 22, a sole section 23, a hosel 24 and a face 25. A heel end 26 of the hybrid golf club head 20 is located on the side with the hosel 24 and a toe end 27 of the hybrid golf club head 20 opposes the heel end 26. A heel-sole weight 30 and toe-sole weight 32 are placed in recesses 34a and 34b of the sole section 23.
The body 21 is preferably composed of a stainless steel material. Alternatively, the body 21 is composed of another iron alloy material, a titanium alloy, an aluminum alloy material or the like.
The hybrid golf club head 20 preferably has a hollow interior 29 as shown in FIG. 11. An interior weight chip mass 35 is placed forward near the face 25 to position the CG forward. The heel-sole weight 30 and toe-sole weight 32 are bonded on the exterior of the sole section 23 to increase the moment of inertia.
A stainless steel crown section 22a is welded over a recess in a metal crown section 22b.










TABLE ONE







Property
Value









Loft
20 degrees



Lie
58.8 degrees



Bulge
 14



Roll
 25.0



Mass
232 grams



Volume
119 cubic centimeters



Toe Weight Mass
4.5 grams



Heel Weight Mass
6.5 grams



Moment of inertia about CG, Ixx
2255 g-cm2



Moment of inertia about CG, Izz
2490



Moment of inertia about CG, Iyy
 639










Table One illustrates mass properties for a preferred embodiment of the hybrid golf club 20. A more thorough explanation of the moment of inertia measurements is explained in Murphy et al., U.S. Pat. No. 7,387,577, which is hereby incorporated by reference in its entirety. The Z axis lies in a crown section 22 to a sole section 23 direction, the X axis lies in a front to rear direction, and the Y axis lies in a heel to toe direction.
From the foregoing it is believed that those skilled in the pertinent art will recognize the meritorious advancement of this invention and will readily understand that while the present invention has been described in association with a preferred embodiment thereof, and other embodiments illustrated in the accompanying drawings, numerous changes, modifications and substitutions of equivalents may be made therein without departing from the spirit and scope of this invention which is intended to be unlimited by the foregoing except as may appear in the following appended claims. Therefore, the embodiments of the invention in which an exclusive property or privilege is claimed are defined in the following appended claims.

## Claims

1. A hybrid golf club head comprising:
a body comprising a crown section, a sole section and a face section;
an exterior heel weight bonded in recesses on an exterior surface of the sole section, the exterior heel weight having a mass ranging from 5 to 10 grams;
an exterior toe weight bonded in recesses on the exterior surface of the sole section, the exterior toe weight having a mass ranging from 5 to 10 grams;
an interior weight chip positioned on an interior surface of the sole section near the face section, the interior weight chip having a mass ranging from 4 to 8 grams;
wherein the hybrid golf club head has a moment of inertia Izz about a center of gravity ranging from 2000 to 3000 grams-centimeters squared;
wherein the hybrid golf club head has a moment of inertia Ixx about a center of gravity ranging from 1900 to 2500 grams-centimeters squared;
wherein the hybrid golf club head has a loft angle ranging from 18 degrees to 28 degrees;
wherein the hybrid golf club head has a volume ranging from 100 to 150 cubic centimeters;
wherein the hybrid golf club head has a mass ranging from 210 grams to 240 grams.

2. The hybrid golf club head according to claim 1 wherein the body is composed of a stainless steel material.

3. The hybrid golf club head according to claim 1 wherein the body is composed of a titanium alloy material.

4. The hybrid golf club head according to claim 1 wherein the hybrid golf club head has a moment of inertia Izz about a center of gravity ranging from 2300 to 2700 grams-centimeters squared.

5. The hybrid golf club head according to claim 1 wherein the hybrid golf club head has a moment of inertia Ixx about a center of gravity ranging from 2100 to 2300 grams-centimeters squared.