Not Applicable
1. Field of the Invention
The present invention relates to a golf club head. More specifically, the present invention relates to a weight for a golf club head that can be adjusted along a continuous channel.
2. Description of the Related Art
The ability to adjust center of gravity location and weight in the head of driving clubs is useful for controlling performance of the golf club. The prior art includes several different solutions for adjustable weighting, but these solutions do not optimize weight adjustment. There is a need for a weighting mechanism that allows for simple and flexible center of gravity (CG) and moment of inertia (MOI) adjustability.
The present invention is a novel way of working with adjustable products. The present invention allows consumers to easily move and fix a weight at any location within a channel in their golf club head. The objective of this invention is to provide an adjustable weight with minimal or no effect on appearance at address while maximizing the ability of the weight to adjust center of gravity height. Additional goals include minimizing the fixed component of the structure dedicated to the weighting system and also minimizing any potential effect on impact sound. Yet another object of the present invention is an adjustable weighting feature for lateral or vertical center of gravity control which is placed to maximize effectiveness and may be entirely concealed from view at address.
Another aspect of the present invention is a golf club head comprising a body comprising a channel and a port, an expandable weight, and a plug sized to fit within the port, wherein the expandable weight is disposed within and movable to any point within the channel, and wherein expanding the weight reversibly fixes it in place within the channel. In some embodiments, the expandable weight may comprise an upper portion, a lower portion, and a bolt, and in some further embodiments at least one of the upper portion and the lower portion may be composed of a material, such as stainless steel or tungsten alloy, that is co-molded with a polymeric material, such as a rubber material. In some embodiments, the upper portion may comprise a depression and a threaded bore sized to receive the bolt, and the lower portion may comprise a cavity and a projection sized to fit within the depression. In alternative embodiments, the upper portion may comprise a projection and a threaded bore sized to receive the bolt, and the lower portion may comprise a cavity and a depression sized to receive the projection.
Yet another aspect of the present invention is a driver-type golf club head comprising a composite crown, a titanium body comprising a face, a sole, a channel, and a weight port, a weight screw sized to fit within the weight port, and an expandable weight comprising an upper portion, a lower portion, a bolt, and a first width, wherein at least one of the upper portion and the lower portion comprises a metal material that is co-molded with a polymeric material, wherein the channel comprises an opening having a second width and an innermost surface having a third width, wherein the second width is less than both the first width and the third width, wherein the expandable weight is contained within and movable to any point within the channel, and wherein expanding the weight reversibly fixes it in place within the channel. In some further embodiments, the channel may comprise an open first end and a closed second end, the weight port may be disposed at the first end, and inserting the weight screw into the weight port may close the first end of the channel and prevent the expandable weight from leaving the channel. In other embodiments, the polymeric material may be a rubber material. In still other embodiments, at least one side of the channel may be provided by the composite crown.
Another aspect of the present invention is a golf club head comprising a body comprising a sole and a channel, an expandable weight disposed, and movable to any point, within the channel, and a cover fixture, wherein affixing the cover fixture to the sole traps the expandable weight within the channel, and wherein expanding the weight reversibly fixes it in place within the channel. In some embodiments, the expandable weight may comprise an upper portion, a lower portion, a bolt, and a first width, and at least one of the upper portion and the lower portion may be composed of stainless steel co-molded with a polymeric material.
Another aspect of the present invention is a golf club head comprising a body comprising a channel, an expandable weight comprising a first piece, a second piece, and a third piece, and a bolt, wherein the expandable weight is disposed within and movable to any point within the channel, and wherein expanding the weight reversibly fixes it in place within the channel. The first piece may composed of a first metal material, such as 17-4 stainless steel, the second piece may composed of a polymeric material, such as plastic or rubber, and the third piece may composed of a second metal material that is different from the first metal material, such as a tungsten or titanium alloy. In some embodiments, the body may comprise a face, a sole, a crown, a heel end, a toe end, and a rear end, and the channel may be disposed within the sole proximate the rear end. In some further embodiments, the channel may extend from the toe end to the heel end. In other embodiments, the channel may extend from the face to the rear end.
In other embodiments, each of the channel and the expandable weight may have an approximately hourglass cross-sectional shape. The channel may comprise an open first end and a closed second end, a weight port may be disposed at the first end, and inserting a weight screw into the weight port may close the first end of the channel. In some embodiments, the first piece may comprise a first through bore, an upper recess, a lower recess having two open sides, and a ledge, the bolt may comprise a head and a threaded portion, the threaded portion may extend through the through bore, and the head may be disposed within the upper recess and rests against the ledge. In other embodiments, the second piece may comprise a second through bore sized to receive the threaded portion, and the second piece may be disposed within the lower recess. In a further embodiment, the third piece may comprise a third through bore sized to receive the threaded portion, the third piece may be disposed below the second piece so that the second piece is sandwiched between the first piece and the third piece, and the third through bore may comprise threads sized to mate with the threads of the threaded portion. In another embodiment, the golf club head may be selected from the group consisting of a driver head, a fairway wood head, and a hybrid head.
Yet another aspect of the present invention is a driver-type golf club head comprising a crown, a titanium body comprising a face, a sole, a channel, and a weight port, a weight screw sized to fit within the weight port, and an expandable weight comprising an upper portion composed of a metal material, a middle portion composed of a polymeric material, a lower portion composed of a metal material, and a bolt, wherein each of the channel and the weight port is disposed in the sole, wherein the channel comprises an open first end and a closed second end, wherein the weight port is disposed at the first end, wherein inserting the weight screw into the weight port closes the first end of the channel and prevents the expandable weight from leaving the channel, wherein the expandable weight is contained within and movable to any point within the channel, and wherein expanding the weight reversibly fixes it in place within the channel. In some embodiments, the upper portion may be composed of 17-4 stainless steel, the middle portion may be composed of plastic or rubber, and the lower portion may be composed of a tungsten alloy. In some embodiments, the crown may be composed of a composite material.
Another aspect of the present invention is a golf club head comprising a body comprising a sole and a channel, an expandable weight disposed, and movable to any point, within the channel, and a cover fixture, wherein affixing the cover fixture to the sole traps the expandable weight within the channel, wherein the expandable weight comprises an upper portion composed of a metal material, a middle portion composed of a polymeric material, a lower portion composed of a metal material, and a bolt, and wherein expanding the weight reversibly fixes it in place within the channel. In some embodiments, each of the channel and the expandable weight may have an approximately hourglass cross-sectional shape. In some embodiments, the cover fixture may be a crown, which may be composed of a material selected from the group consisting of composite, plastic, titanium alloy, and stainless steel.
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.
The design approaches described herein are based on a construction used in a driver head characterized by a composite crown adhesively bonded to a cast titanium body. This particular construction approach permits the crown configuration to be adapted to the inventive weighting scheme with minimal impact on weight and function. However, the weighting embodiments disclosed herein can be used with other constructions, including all titanium, all composite, and a composite body with metal face cup. It can also work in conjunction with at least one adjustable weight port on the sole of the driver head. Shifting weight along the channel described herein allows for control of center of gravity location.
A first embodiment of the present invention is shown in
A slidable weight 30 is disposed within the channel 20, and is inserted into the channel 20 at an opening 25 proximate the heel 16, which is closed with a weight screw 40 or a lightweight plug once the slidable weight 30 is inserted into the channel 20. The weight screw 40 or plug and slidable weight 30 can be made of any material known to a person of ordinary skill in the art, and can be selected to better adjust mass properties of the club head. Once the opening 25 is closed, the slidable weight 30 is trapped within the channel 20, though removing the weight screw 40 or the plug allows the slidable weight 30 to be removed and exchanged for one having different structural and/or material characteristics. As shown in
A second embodiment of the present invention is shown in
While in the configuration shown in
Because the opening of the channel 20 has a smaller width W2 than the width of the slidable weight 50, the slidable weight 50 does not fall out of the channel 20 when it is in its expanded configuration. In this way, the slidable weight 50 can be reversibly fixed at any location within the channel 20, not just at points within the channel 20 that have predetermined openings or notches as required in prior art clubs such as those disclosed in U.S. Pat. Nos. 7,611,424 and 8,016,694.
A third embodiment of the present invention is shown in
A fourth embodiment of the present invention is shown in
A preferred embodiment of the present invention is shown in
In the preferred embodiment, the slidable weight 200 includes an upper portion 205 composed of a durable metal material, preferably 17-4 stainless steel, a middle portion 210 composed of a lightweight, expandable material, preferably injection-molded plastic or rubber, and a lower portion 215 composed of a metal material, the composition of which can be adjusted depending on the weighting needs of the golf club head 10. Any of these portions 205, 210, 215, and particularly the upper and lower portions 205, 215, may be co-molded with a polymeric material as desired by the manufacturer. The upper portion 205 includes an upper recess 207a sized to receive the head 221 of the bolt 220, an unthreaded through bore 207c sized to receive the threaded portion 222 of the bolt 220, and a ledge 209 against which the head 221 of the bolt 220 rests. The lower portion 215 includes a through bore 217 with internal threads 218 that grip the threaded portion 222 of the bolt 220, prevent the bolt from disengaging from the slidable weight 200, and thus hold the portions 205, 210, 215 of the slidable weight 200 together.
As shown in
The slidable weight 200 has an hourglass-like cross-sectional shape, as shown in
When a user wishes to adjust the location of the slidable weight 200 shown in
In a further embodiment, the golf club head 10 and slidable weight 200 embodiment shown in
In alternative embodiments, the channels 20, 120, 140, 250 of the present invention may be disposed in the sole 14 perpendicular to the face 17, as shown in
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.
The present application is a continuation-in-part of U.S. patent application Ser. No. 13/778,958, filed on Feb. 27, 2013, which claims priority to U.S. Provisional Patent Application No. 61/727,608, filed on Nov. 16, 2012, the disclosure of each of which is hereby incorporated by reference in its entirety herein.
Number | Name | Date | Kind |
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4021047 | Mader | May 1977 | A |
6015354 | Ahn et al. | Jan 2000 | A |
8016694 | Llewellyn et al. | Sep 2011 | B2 |
20060122004 | Chen et al. | Jun 2006 | A1 |
Number | Date | Country | |
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61727608 | Nov 2012 | US |
Number | Date | Country | |
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Parent | 13778958 | Feb 2013 | US |
Child | 13923571 | US |