Weighted golf club head having stress-relieving tubes

Abstract

A golf club head comprising a body, an elevated weight bar, and a plurality of carbon tubes is disclosed herein. The body comprises a hollow interior, a face section, a sole section, and a crown section, and the elevated weight bar bridges at least a portion of the sole and may be formed separately from the rest of the body and then affixed to the body by welding or a mechanical fastener. In one embodiment, each of the carbon tubes extends from the crown section and terminates at the elevated weight bar, while in another embodiment each of the carbon tubes extends from the crown section to the sole section and passes through the elevated weight bar without making contact with the floating weight bar.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a golf club head. More specifically, the present invention relates to a golf club head with composite tubes intersecting a weight feature.

Description of the Related Art

The prior art discloses various golf club heads having interior structures. For example: Yabu, U.S. Pat. No. 6,852,038 for a Golf Club Head And Method of Making The Same, discloses a golf club head with a sound bar; Galloway, U.S. Pat. No. 7,118,493 for a Multiple Material Golf Club Head discloses a golf club head with a composite aft body having an interior sound component extending upward from a sole section of a metal face component; Seluga et al., U.S. Pat. No. 8,834,294 for a Golf Club Head With Center Of Gravity Adjustability discloses a golf club head with a tube having a mass for adjusting the CG of a golf club head; and Dawson et al., U.S. Pat. No. 8,900,070 for a Weighted Golf Club Head discloses a golf club head with an interior weight lip extending from the sole towards the face.

However, the prior art fails to disclose an interior structure that increases ball speed while reducing stress in the face at impact, with a minimal increase in mass to the golf club head.

BRIEF SUMMARY OF THE INVENTION

The inventive golf club head comprises a weight bar proximate the face and bridging at least a portion of the sole, and a plurality of interior carbon tubes extending at least partially through the weight bar. In some embodiments, at least one of the carbon tubes connects the sole to the crown and thereby reduces the stress in a face during impact with a golf ball. In a further embodiment, the carbon tubes connecting the sole to the crown do not make contact with the weight bar.

One aspect of the present invention is a golf club head with carbon tubes. The golf club head includes a body, a face component and carbon tubes. The body comprises a sole section, a crown section, a front section having an opening, and a protrusion extending from a heel side of the body to a toe side of the body over at least a portion of the sole section and towards the front section. The face component is positioned over the opening. Each of the carbon tubes extends from the crown section to the protrusion.

Another aspect of the present invention is a fairway wood-type golf club head comprising a body, a face component and carbon tubes. The body comprises a sole section having a protrusion extending upward and forward, a crown section and a front section having an opening. The body is composed of a first metal material. The face component is positioned over the opening. The face component is composed of a second metal material. The face component comprises a striking plate portion and a return portion. Each of the carbon tubes extends from the crown section to the protrusion.

Yet another aspect of the present invention is a golf club head comprising a body comprising a sole section, a crown section, a front section having an opening, a hollow interior, and an elevated weight bar extending from a heel side of the sole section to a toe side of the sole section and bridging a central area of the sole section, a face component positioned over the opening, and a plurality of carbon tubes, each of the plurality of carbon tubes extending from the crown section to the elevated weight bar, wherein none of the plurality of carbon tubes contacts the sole section, and wherein the elevated weight bar and each of the plurality of carbon tubes are disposed within the hollow interior proximate the front section. The plurality of carbon tubes may range from two carbon tubes to eight carbon tubes, or it may comprise three carbon tubes, each of which may be spaced no less than 12 millimeters and no more than 25 millimeters from an adjacent carbon tube. In some embodiments, each of the plurality of carbon tubes may have a diameter ranging from 2 millimeters to 5 millimeters and a length ranging from 30 millimeters to 60 millimeters. In other embodiments, each of the plurality of carbon tubes may be within 11 millimeters of an interior surface of a striking plate of the face component.

In some embodiments, the crown section may comprise a plurality of apertures, each of which may correspond to a carbon tube of the plurality carbon tubes, and the elevated weight bar may comprise a plurality of bores, each of which may correspond to a carbon tube of the plurality carbon tubes. In other embodiments, the golf club head may have a volume ranging from 100 cubic centimeters to 300 cubic centimeters. In still other embodiments, each of the plurality of carbon tubes may be positioned rearward from an interior surface of a striking plate section of the face component a distance ranging from 2 millimeters to 11 millimeters. In some embodiments, the body may be composed of an iron alloy.

Another aspect of the present invention is a golf club head comprising a body comprising a sole section, a crown section, a front section having an opening, a hollow interior, and an elevated weight bar extending from a heel side of the sole section to a toe side of the sole section and bridging a central area of the sole section, a face component positioned over the opening, and a plurality of carbon tubes, each of the plurality of carbon tubes extending from the crown section to the sole section, wherein the elevated weight bar comprises a plurality of through-bores, wherein each of the plurality of carbon tubes extends through one of the plurality of through-bores to contact the sole section, and wherein the elevated weight bar and each of the plurality of carbon tubes are disposed within the hollow interior proximate the front section. The elevated weight bar may be formed separately from the body and then be welded to the sole section. In some embodiments, the crown section may comprise a first plurality of apertures, each of which may correspond to a carbon tube of the plurality carbon tubes, and the sole section may comprise a second plurality of apertures, each of which may correspond to a carbon tube of the plurality carbon tubes. In some embodiments, none of the plurality of carbon tubes may make contact with the elevated weight bar.

In some embodiments, the face component may comprise at least one return section and a striking plate section, and each of the plurality of carbon tubes may be within 11 millimeters of an interior surface of the striking plate section. In other embodiments, the golf club head may comprise a plurality of bosses, each of which may correspond to an aperture of the first and second pluralities of apertures. In some embodiments, the golf club head may be a wood-type golf club head, and each of the plurality of carbon tubes may be spaced a distance of at least 12 millimeters and no more than 25 millimeters from an adjacent carbon tube.

Yet another aspect of the present invention is a fairway wood-type golf club head comprising a steel body comprising a sole section, a crown section, a front section having an opening, a hollow interior, and an elevated weight bar extending from a heel side of the sole section to a toe side of the sole section and bridging a central area of the sole section, a steel face component positioned over the opening, the face component comprising a striking plate section and at least one return section, and at least three carbon tubes, each of the carbon tubes extending from the crown section to the sole section and positioned rearward from an interior surface of the striking plate section a distance of no less than 2 millimeters and no more than 11 millimeters, wherein the elevated weight bar comprises at least three through-bores, wherein each of the carbon tubes extends through one of the through-bores to contact the sole section, wherein none of the carbon tubes contacts the elevated weight bar, wherein the elevated weight bar and each of the plurality of carbon tubes are disposed within the hollow interior proximate the front section, and wherein the elevated weight bar is welded to the sole section.

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 top perspective view of a first golf club head with composite tubes.

FIG. 2 is a sole perspective view of the golf club head shown in FIG. 1.

FIG. 3 is a front perspective view of the golf club head shown in FIG. 1 with the face component removed to illustrate an interior.

FIG. 4 is an exploded view of the golf club head shown in FIG. 1.

FIG. 5 is a front elevation view of the golf club head shown in FIG. 1.

FIG. 6 is a rear elevation view of the golf club head shown in FIG. 1.

FIG. 7 is a top plan view of the golf club head shown in FIG. 1.

FIG. 8 is a sole perspective view of the golf club head shown in FIG. 1 engaged with a shaft.

FIG. 9 is a side elevation view of the golf club head shown in FIG. 1.

FIG. 10 is a top plan view of a second golf club head with composite tubes with the face component removed.

FIG. 11 is a side elevation view of the golf club head shown in FIG. 10.

FIG. 12 is a front elevation view of the golf club head shown in FIG. 10.

FIG. 13 is a cross-sectional view of the golf club head shown in FIG. 12 along lines 13-13.

FIG. 14 is a top plan view of a third golf club head with composite tubes with the face component removed.

FIG. 15 is a side elevation view of the golf club head shown in FIG. 14.

FIG. 16 is a front elevation view of the golf club head shown in FIG. 14.

FIG. 17 is a cross-sectional view of the golf club head shown in FIG. 16 along lines 17-17.

FIG. 18 is a top plan, partially transparent view of the golf club head shown in FIG. 14 with the face component attached.

FIG. 19 is a sole elevation, partially transparent view of the golf club head shown in FIG. 18.

FIG. 20 is a top perspective view of a fourth golf club head with a crown section removed to illustrate an interior.

FIG. 21 is a top perspective exploded view of the golf club head shown in FIG. 20.

FIG. 22 is a top perspective view of the golf club head shown in FIG. 21 with a crown section removed to illustrate an interior.

FIG. 23 is a cross-sectional view of the golf club head shown in FIG. 21 when fully assembled.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIGS. 1-9, a golf club head is generally designated 20. The golf club head 20 preferably includes a body 22 having a hosel 34, a crown section 36, a sole section 38 with a protrusion 60, a heel end 24, a toe end 26, and an aft end 28. A face component 30 is placed over an opening 39 in the body 22. The body 22, along with the face component 30, preferably defines a hollow interior 40. Within the hollow interior 40, multiple carbon tubes 50 extend from the protrusion 60 of the sole section 38 upward to the crown section 36.

The plurality of carbon tubes 50 preferably ranges from two carbon tubes to eight carbon tubes. Each of the plurality of carbon tubes 50 preferably has a diameter ranging from 2 millimeters to 5 millimeters. Each of the plurality of carbon tubes 50 preferably has a length ranging from 30 millimeters to 60 millimeters. Each of the plurality of carbon tubes 50 is preferably positioned within 11 millimeters of an interior surface of the face component 30. The mass of each of the plurality of carbon tubes 50 preferably ranges from 0.5 gram to 3 grams, more preferably from 1 gram to 2 grams, and most preferably each carbon tube 50 has a mass of 1.5 grams. The crown section 36 preferably comprises a plurality of apertures 42 with bosses 44 extending therefrom for support. Each of the plurality of apertures 42a, 42b, 42c and their respective bosses 44a, 44b, 44c preferably corresponds to a carbon tube 50a, 50b, 50c of the plurality of carbon tubes 50. The sole section 38 preferably comprises a plurality of bosses 43a, 43b, 43c each of which preferably corresponds to a carbon tube 50a, 50b, 50c of the plurality of carbon tubes 50. The carbon tubes 50a, 50b, 50c preferably are glued into the bosses 43a, 43b, 43c.

The face component 30 preferably comprises a striking plate section 30a and return sections 31a and 31b that are approximately perpendicular to the striking plate section 30a. The face component 30 is preferably welded over the opening 39 of the body 22. The face component 30 is preferably composed of a metal that is different than the metal of the body 22. The face component 30 is preferably composed of a high performance metal material such as SP700 titanium alloy, carpenter steel, or the like. The face component 30 preferably has a varying thickness, which may be the varying thickness described in U.S. Pat. No. 7,448,960, for a Golf Club Head With Variable Face Thickness, which pertinent parts are hereby incorporated by reference. Other alternative embodiments of the thickness of the face component 30 are disclosed in U.S. Pat. No. 6,398,666, for a Golf Club Striking Plate With Variable Thickness, U.S. Pat. No. 6,471,603, for a Contoured Golf Club Face and U.S. Pat. No. 6,368,234, for a Golf Club Striking Plate Having Elliptical Regions Of Thickness, all of which are owned by Callaway Golf Company and which pertinent parts are hereby incorporated by reference. Alternatively, the face section has a uniform thickness.

In order to achieve a low, frontward center of gravity (CG) without affecting a weld seam, the protrusion 60 is located inside the hollow interior 40 and proximate the opening 39. This construction avoids creating welding problems, but still allows for discretionary mass to be located mostly low and forward in the golf club head 20. The protrusion 60 preferably has a base section 60b and an extension section 60a. The carbon tubes 50 are positioned on the extension section 60a of the protrusion 60. The protrusion 60, which preferably is cast into the body 22 but may, in alternative embodiments, be welded or affixed mechanically to the body 22, extends upwards from the sole section 38 and protrudes from the opening of the body 22. When the golf club head 20 is assembled, the protrusion 60 extends towards the face component 30 without making contact with the striking plate section 30a. The protrusion 60 preferably comprises at least 20% of the mass of the body 22, and more preferably 30% of the mass of the body 22. The protrusion 60 preferably ranges in mass from 30 grams to 60 grams. U.S. Pat. No. 8,414,420 for a Weighted Golf Club Head to Erickson is hereby incorporated by reference in its entirety herein.

In an alternative, preferred embodiment, shown in FIGS. 10-13, the golf club head 20 has all of the same features as the embodiment shown in FIGS. 1-9, except that the body 22 includes an elevated weight bar 70 that extends from a heel portion 38a to a toe portion 38b of the sole section 38, and bridges a central area 38c of the sole proximate the opening 39. The elevated weight bar 70 includes a plurality of through-bores 72a, 72b, 72c that line up with the apertures 42a, 42b, 42c in the crown section 36 and that receive the lower ends 52 of the carbon tubes 50a, 50b, 50c. Though the through-bores 72 do not include bosses 43 in this embodiment, bosses 43 may be included in an alternative embodiment. As shown in FIG. 13, the lower ends 52 of the carbon tubes 50a, 50b, 50c preferably are entirely contained within the through-bores 72 and do not extend into the space between the elevated weight bar 70 and the central area 38c of the sole section 38.

During impact, and at least partially due to the thin, lightweight materials used to make crowns, flexible areas of the crown section 36 are known to change launch and backspin in the same outer mold line (OML), particularly high on the striking plate section 30a. In this preferred embodiment, the carbon tubes 50 do not touch any portion of the sole section 38, but provide support for the crown section 36 and constrain the crown section 36 from its typical movement. This concentrates as much of the movement as possible in the sole section 38, which can move only because of the elevated weight bar 70. In another embodiment, the golf club head 20 may also include a slot 80 extending into the sole section 38 proximate the elevated weight bar 70, like the one shown in FIGS. 2 and 8, to further allow the sole section 38 to flex.

In yet another embodiment of the present invention, shown in FIGS. 14-19, the golf club head 20 has all of the same elements as the preferred embodiment, except that the carbon tubes 50a, 50b, 50c extend completely through the through-bores 72 of the elevated weight bar 70 to connect the crown section 36 with the sole section 38. In this embodiment, the carbon tubes 50a, 50b, 50c preferably do not make contact with any portion of the elevated weight bar 70, so the through-bores 72 preferably have larger diameters in this embodiment than in the preferred embodiment. Each carbon tube 50a, 50b, 50c extends from an aperture 42a, 42b, 42c in the crown section 36, through a through-bore 72a, 72b, 72c, and into an aperture 46a, 46b, 46c in the sole section 38. As shown in the Figures, each set of apertures 42a, 42b, 42c, 46a, 46b, 46c and through-bores 72a, 72b, 72c is aligned vertically so that the carbon tubes 50a, 50b, 50c do not need to be bent to extend through them. Each aperture 46 in the sole section 38 also has a boss 48 to better support the carbon tube 50 engaged with that aperture 46.

In the embodiments shown in FIGS. 11-19, the elevated weight bar 70 may be integrally cast with the body 22, but preferably is manufactured separately from the body 22 and is welded or mechanically affixed to the sole section 38. In any of the embodiments disclosed herein, the carbon tubes 50 may be placed in tension or in compression between the crown and sole sections 36, 38 or the crown section 36 and the protrusion 60 or elevated weight bar 70.

In the embodiment shown in FIGS. 20-23, the golf club head 20 includes a body 22 having a sole section 38, a face section 30, a return section 70, a heel end 24, a toe end 26 and an aft end 28. A crown section 36 is placed on an opening 39 in the body 22, the opening 39 defined by the sole section 38 and return section 70. The body section 22, along with the crown section 36, defines a hollow interior 40, within which multiple carbon tubes 50 extend from the sole section 38 upward to the return section 70. The plurality of carbon tubes 50 ranges from two carbon tubes to eight carbon tubes, and each of the plurality of carbon tubes 50 has a diameter ranging from 2 millimeters to 5 millimeters. Each of the plurality of carbon tubes 50 has a length ranging from 30 millimeters to 60 millimeters and is positioned within 11 millimeters of an interior surface of the face section 30. The mass of each of the plurality of carbon tubes 50 ranges from 0.5 gram to 3 grams, more preferably from 1 gram to 2 grams, and most preferably each carbon tube 50 has a mass of 1.5 grams.

The return section 70 preferably comprises a plurality of apertures 42, each of which corresponds to a carbon tube 50 of the plurality carbon tubes 50. The sole section 38 preferably comprises a plurality of bosses 43, each of which corresponds to a carbon tube 50 of the plurality carbon tubes 50. The carbon tubes 50 are preferably glued into the bosses 50.

The high weight pads 60 and 61 have a mass ranging from 5 grams to 50 grams, more preferably from 10 grams to 30 grams, and most preferably from 15 grams to 25 grams. The high weight pads 60 and 61 are composed of a material that has a density ranging from 5 grams per cubic centimeters to 20 grams per cubic centimeters, more preferably from 7 grams per cubic centimeters to 12 grams per cubic centimeters. The high weight pads 60 and 61 are composed of a polymer material integrated with a metal material, which is preferably selected from copper, tungsten, steel, aluminum, tin, silver, gold, platinum, or the like. A preferred metal is tungsten due to its high density. The polymer material is a thermoplastic or thermosetting polymer material. A preferred polymer material is polyurethane, epoxy, nylon, polyester, or similar materials. A most preferred polymer material is a thermoplastic polyurethane. A preferred high weight pad 60 is an injection molded thermoplastic polyurethane integrated with tungsten to have a density of 8.0 grams per cubic centimeters. In an alternative embodiment, the high weight pad 60 is composed of from 50 to 95 volume percent polyurethane and from 50 to 5 volume percent tungsten. Also, in an alternative embodiment, the high weight pad 60 is composed of from 10 to 25 weight percent polyurethane and from 90 to 75 weight percent tungsten. The placement of the high weight pads 60 allow for the moment of inertia of the golf club head to be optimized.

In each of the embodiments disclosed herein, the body 22 is preferably cast from molten metal in a method such as the well-known lost-wax casting method. The metal for casting is preferably titanium or a titanium alloy such as 6-4 titanium alloy, alpha-beta titanium alloy or beta titanium alloy for forging, and 6-4 titanium for casting. Alternatively, the body 22 is composed of 17-4 steel alloy. Additional methods for manufacturing the body 22 include forming the body 22 from a flat sheet of metal, super-plastic forming the body from a flat sheet of metal, machining the body 22 from a solid block of metal, electrochemical milling the body 22 from a forged pre-form, casting the body using centrifugal casting, casting the body 22 using levitation casting, and like manufacturing methods.

The embodiments of the golf club head 20 disclosed herein, when designed as a driver, preferably have a volume from 200 cubic centimeters to 600 cubic centimeters, more preferably from 300 cubic centimeters to 500 cubic centimeters, and most preferably from 420 cubic centimeters to 470 cubic centimeters, with a most preferred volume of 460 cubic centimeters. The volume of the golf club heads 20 will also vary between fairway woods (preferably ranging from 3-woods to eleven woods) with smaller volumes than drivers.

The golf club heads 20 disclosed herein, when designed as a driver, preferably have a mass no more than 215 grams, and most preferably a mass of 180 to 215 grams. When the golf club heads 20 are designed as a fairway wood, the golf club heads 20 preferably have a mass of 135 grams to 200 grams, and preferably from 140 grams to 165 grams. In some embodiments, the golf club head 20 has a volume of 460 cubic centimeters with the Characteristic Time (CT) of the face close to, but not exceeding, the 257 microsecond (“μS”) limit set by the USGA.

In other embodiments, the golf club head 20 may have a multi-material composition such as any of those disclosed in U.S. Pat. Nos. 6,244,976, 6,332,847, 6,386,990, 6,406,378, 6,440,008, 6,471,604, 6,491,592, 6,527,650, 6,565,452, 6,575,845, 6,478,692, 6,582,323, 6,508,978, 6,592,466, 6,602,149, 6,607,452, 6,612,398, 6,663,504, 6,669,578, 6,739,982, 6,758,763, 6,860,824, 6,994,637, 7,025,692, 7,070,517, 7,112,148, 7,118,493, 7,121,957, 7,125,344, 7,128,661, 7,163,470, 7,226,366, 7,252,600, 7,258,631, 7,314,418, 7,320,646, 7,387,577, 7,396,296, 7,402,112, 7,407,448, 7,413,520, 7,431,667, 7,438,647, 7,455,598, 7,476,161, 7,491,134, 7,497,787, 7,549,935, 7,578,751, 7,717,807, 7,749,096, and 7,749,097, the disclosure of each of which is hereby incorporated in its entirety herein.

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 golf club head comprising: a body comprising a sole section, a crown section, a front section having an opening, a hollow interior, and an elevated weight bar extending from a heel side of the sole section to a toe side of the sole section and bridging a central area of the sole section;a face component positioned over the opening, the face component comprising a striking plate section having an interior surface facing the hollow interior; anda tube extending from the crown section to the elevated weight bar,wherein the tube does not contact the sole section,wherein the tube has a length ranging from 30 millimeters to 60 millimeters,wherein the tube is disposed within 11 millimeters of the interior surface,wherein each of the elevated weight bar and the tube is disposed within the hollow interior proximate the front section, andwherein the tube reduces stress in the striking plate section upon impact with a golf ball.

2. The golf club head according to claim 1, wherein the crown section comprises at least one aperture, wherein the at least one aperture corresponds to the tube, wherein the elevated weight bar comprises at least one bore, and wherein the at least one bore corresponds to the tube.

3. The golf club head according to claim 1 wherein the golf club head has a volume ranging from 100 cubic centimeters to 300 cubic centimeters.

4. The golf club head according to claim 1 wherein the body is composed of an iron alloy.

5. The golf club head according to claim 1, wherein tube has a diameter ranging from 2 millimeters to 5 millimeters, and wherein the tube is placed in tension between the crown section and the elevated weight bar.

6. A golf club head comprising: a body comprising a sole section, a crown section, a striking plate section, a hollow interior, and an elevated weight bar extending from a heel side of the sole section to a toe side of the sole section and bridging a central area of the sole section; anda at least one tube extending from the crown section to the sole section,wherein the striking plate section comprises an interior surface facing the hollow interior,wherein the elevated weight bar comprises at least one through-bore,wherein the at least one tube extends through the at least one through-bore to contact the sole section,wherein the at least one tube does not contact the elevated weight bar,wherein the at least one tube is disposed within 11 millimeters of the interior surface of the striking plate section,wherein each of the elevated weight bar and the at least one tube is disposed within the hollow interior proximate the front section, andwherein the at least one tube reduces stress in the striking plate section upon impact with a golf ball.

7. The golf club head according to claim 6, wherein the elevated weight bar is formed separately from the body.

8. The golf club head according to claim 7, wherein the elevated weight bar is welded to the sole section.

9. The golf club head according to claim 7, wherein the elevated weight bar is mechanically affixed to the sole section.

10. The golf club head according to claim 6, wherein the crown section comprises at least one first aperture corresponding to the at least one tube, and wherein the sole section comprises at least one second aperture corresponding to the at least one tube.

11. The golf club head according to claim 10, further comprising at least one boss, wherein the at least one boss corresponds to the at least one first aperture.

12. The golf club head according to claim 6, wherein the body is composed of a material selected from the group consisting of steel and titanium alloy.

13. The golf club head according to claim 6, wherein the golf club head is a wood-type golf club head.

14. The golf club head according to claim 6, wherein the at least one tube comprises first and second tubes, wherein the first tube is spaced a distance of at least 12 millimeters and no more than 25 millimeters from the second tube.

15. The golf club head according to claim 14, wherein at least one of the first and second tubes is placed in tension between the crown section and the sole section.

16. The golf club head according to claim 14, wherein at least one of the first and second tubes is placed in compression between the crown section and the sole section.

17. A wood-type golf club head comprising: a metal body comprising a face section, a sole section, and a return section, the sole section and return section defining an upper opening in the body;a composite crown section disposed on the body to close the upper opening and define a hollow interior of the golf club head; andat least one tube extending from the return section to the sole section,wherein the at least one tube is positioned rearward from an interior surface of the face section a distance ranging from 2 millimeters to 11 millimeters,wherein the at least one tube has a length ranging from 30 millimeters to 60 millimeters,wherein the return section comprises at least one aperture corresponding to the at least one tube,wherein the sole section comprises at least one boss corresponding to the at least one tube,wherein the body is composed of a material selected from the group consisting of steel and titanium alloy, andwherein the at least one tube reduces stress in the face section upon impact with a golf ball.

18. The wood-type golf club head of claim 17, wherein the golf club head has a volume ranging from 200 cubic centimeters to 475 cubic centimeters.

19. The wood-type golf club head of claim 17, wherein the at least one tube comprises first and second tubes, wherein the first tube is spaced a distance of at least 12 millimeters and no more than 25 millimeters from the second tube, and wherein at least one of the first and second tubes is placed in tension between the return section and the sole section.

20. The wood-type golf club head of claim 17, wherein the golf club head is a driver.