Multi-stage forging process
AssigneeKarsten Manufacturing Corporation
InventorsYujen Huang, Erik M. Henrikson, Matthew T. Schier
Life of this patent
Estimating the term…
Abstract
An iron-type golf club head with a cavity formed via a multi-stage forging process. The forged iron-type golf club head is formed from a single billet of material. An intermediate step of the multi-stage forging process creates a cavity in the iron-type golf club head which can receive an insert. The resultant iron-type golf club head has a substantially lower center of gravity and higher moment of inertia when compared to a traditionally forged iron-type golf club head lacking a cavity. Additionally, the resultant iron-type golf club head has a more solid feel than a traditionally cast iron-type golf club head as a result of the tighter grain structure the forging process yields.
Claims18
A forged golf club head comprising:
- a top rail, a sole opposite the top rail, a hosel, a toe region, a heel region opposite the toe region, a rear, a strike face, and a forged cavity formed in a lower rear region, an applique applied to an applique recess in an upper rear region;
- wherein:
- the forged cavity comprises a front wall proximate the strike face, a rear wall space rearwardly of the front wall, a bottom wall, a toe wall, and a heel wall;
- the forged cavity comprises a depth which ranges from 10 mm to 13 mm measured from the bottom wall to a topmost portion of the rear wall, parallel to a loft plane;
- the forged cavity comprises a width which ranges from 3.8 mm to 11 mm, measured from the front wall to the rear wall, perpendicular to the loft plane;
- the forged cavity comprises a top surface plane which intersects a topmost point of the front wall and intersects the topmost point of the rear wall;
- the forged cavity comprises a top surface angle which is the angle between the top surface plane the loft plane;
- the top surface angle ranges between 110 degrees and 130 degrees;
- the forged cavity comprise a cavity height measured parallel to the loft plane, from a sole plane to the bottom wall, the cavity height is between 3 mm and 8 mm;
- the forged cavity comprises a cavity length, measured from the heel wall to the toe wall, between 55 and 65 mm;
- and
- the forged golf club head is forged from a single solid billet.
A forged golf club head comprising:
- a top rail, a sole opposite the top rail, a hosel, a toe region, a heel region opposite the toe region, a rear, a strike face, and a forged cavity formed in a lower rear region, an applique applied to an applique recess in an upper rear region;
- wherein:
- the forged cavity comprises a front wall proximate the strike face, a rear wall space rearwardly of the front wall, a bottom wall, a toe wall, and a heel wall;
- the forged cavity comprises a depth which ranges from 10 mm to 12 mm measured from the bottom wall to a topmost portion of the rear wall, parallel to a loft plane;
- the forged cavity comprises a width which ranges from 3.8 mm to 11 mm, measured from the front wall to the rear wall, perpendicular to the loft plane;
- the forged cavity comprises a top surface plane which intersects a topmost point of the front wall and intersects the topmost point of the rear wall;
- the forged cavity comprises a top surface angle which is the angle between the top surface plane the loft plane;
- the top surface angle ranges between 110 degrees and 130 degrees;
- the forged cavity comprise a cavity height measured parallel to the loft plane, from a sole plane to the bottom wall, the cavity height is between 5 mm and 8 mm;
- the forged cavity comprises a cavity length, measured from the heel wall to the toe wall, between 55 and 65 mm;
- the applique recess is formed in a middle region having a second thickness measured perpendicular to the strike face, the second thickness is between 1 and 3 mm;
- and
- the forged golf club head is forged from a single solid billet.
Dependencies are inferred from the claim text.