Variable density golf club
First Claim
1. A golf club head, comprising:
- a body defining a front surface, a top line, a sole, a back, a heel, and a toe, said back containing a recess in only a lower portion thereof, said recess extending toward said sole, said body formed of a material having a first specific gravity; and
an insert positioned within said recess, said insert being configured to matingly correspond to said recess, said insert having a second specific gravity less than said first specific gravity;
wherein said back is substantially free of any cavity; and
wherein said insert extends above said recess along said back to form a muscle of the club head;
wherein said insert comprises a lock groove to couple said insert and said body; and
wherein said insert further comprises a rib to impose a preload upon said body, and wherein said rib swages into a rear surface of said front surface.
6 Assignments
0 Petitions
Accused Products
Abstract
A golf club head having portions of varying density is disclosed and claimed. The club head includes a body with a recess in the back between the heel and toe and extending toward the sole. An insert that is configured to matingly correspond to the recess is positioned within the recess. The insert has a lower specific gravity than the club head body, biasing the club head mass toward the club head perimeter. The insert can form a muscle of the club head. The club head is forged, and the recess is formed by machining. After the insert is positioned within the recess, the club head-insert combination is subjected to additional forging and finishing steps. The present invention increases the club head moment of inertia and/or enlarges the club head sweet spot while retaining the golfer'"'"'s ability to work the golf ball and shape the golf shot. The present invention can be used with forged, blade, and muscle back clubs, which have not heretofore been enhanced in these manners.
86 Citations
28 Claims
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1. A golf club head, comprising:
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a body defining a front surface, a top line, a sole, a back, a heel, and a toe, said back containing a recess in only a lower portion thereof, said recess extending toward said sole, said body formed of a material having a first specific gravity; and an insert positioned within said recess, said insert being configured to matingly correspond to said recess, said insert having a second specific gravity less than said first specific gravity; wherein said back is substantially free of any cavity; and wherein said insert extends above said recess along said back to form a muscle of the club head; wherein said insert comprises a lock groove to couple said insert and said body; and wherein said insert further comprises a rib to impose a preload upon said body, and wherein said rib swages into a rear surface of said front surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A golf club head, comprising:
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a body defining a front surface, a top line, a sole, a back, a heel, and a toe, said back containing a recess in only a lower portion thereof, said recess extending toward said sole, said body formed of a material having a first specific gravity; and an insert positioned within said recess, said insert being configured to matingly correspond to said recess, said insert having a second specific gravity less than said first specific gravity; wherein said insert comprises a lock groove to couple said insert and said body; wherein said insert further comprises a rib to impose a preload upon said body; wherein said rib swages into a rear surface of said front surface; and wherein said second specific gravity is at most 5. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A golf club head, comprising:
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a body defining a front surface, a top line, a sole, a back, a heel, and a toe, said back containing a recess in only a lower portion thereof, said recess extending toward said sole, said body formed of a material having a first specific gravity; and an insert positioned within said recess, said insert being configured to matingly correspond to said recess, said insert having a second specific gravity less than said first specific gravity; wherein said insert comprises a lock groove to engage with said body to retain said insert within said recess; wherein said insert further comprises a rib to impose a preload upon said body; wherein said rib swages into a rear surface of said front surface; and wherein a difference between said first and second specific gravities is at least 3. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification