IRON-TYPE GOLF CLUB HEAD

• US 20180117425A1
• Filed: 12/29/2017
• Published: 05/03/2018
• Est. Priority Date: 12/31/2014
• Status: Active Grant

• Current Assignee: Taylor Made Golf Co., Inc.
• Original Assignee: Taylor Made Golf Co., Inc.
• Inventors: Taylor, Scott, Warren, Adam, Issertell, Jason
• Granted Patent: US 10,493,336 B2
• Time in Patent Office: Days
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/023 adjustable angular orientation
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/045 Strengthening ribs
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/0475 with one or more enclosed cavities
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/002 Resonance frequency related characteristics
• CPC Class Codes: A63B 60/52 with slits

Abstract

Disclosed herein is an iron-type golf club head comprising a body comprising a heel portion, a sole portion, a toe portion, and a topline portion. The topline portion has a mass per unit length of between 0.09 g/mm and 0.40 g/mm. The golf club head also comprises a strike plate coupled to the body at a front portion of the golf club head and a cavity defined between the topline portion, the sole portion, and the strike plate. The golf club head further comprises a bridge bar at a rear portion of the golf club head. The bridge bar spans the cavity, is spaced apart from the strike plate, and is rigidly fixed to and extends uprightly between the sole portion and the topline portion. The bridge bar has a mass per unit length of between 0.09 g/mm and 0.40 g/mm.

Claims

1. An iron-type golf club head, comprising:

a body comprising a heel portion, a sole portion, a toe portion, and a topline portion, wherein the topline portion has a mass per unit length of between 0.09 g/mm and 0.40 g/mm;

a strike plate coupled to the body at a front portion of the golf club head;

a cavity defined between the topline portion, the sole portion, and the strike plate; and

a bridge bar at a rear portion of the golf club head, the bridge bar spanning the cavity, spaced apart from the strike plate, and rigidly fixed to and extending uprightly between the sole portion and the topline portion, wherein the bridge bar has a mass per unit length of between 0.09 g/mm and 0.40 g/mm.

2. The iron-type golf club head according to claim 1, wherein:

a Z-up of the golf club head is below about 20 mm;

the topline portion comprises weight reducing features that shift a Z-up of the golf club head downward by at least 0.4 mm; and

the bridge bar shifts the Z-up of the golf club head upward by less than 2.0 mm.

3. The iron-type golf club head according to claim 2, wherein the weight reducing features shift the Z-up of the golf club head downward by at least 1.0 mm.

4. The iron-type golf club head according to claim 1, wherein the topline portion comprises weight reducing and stiffening features comprising:

a rearwardly and downwardly directed overhang; and

a plurality of ribs coupled to an underside of the overhang.

5. The iron-type golf club head according to claim 4, wherein the bridge bar is fixed to one rib of the plurality of ribs.

6. The iron-type golf club head according to claim 1, wherein the bridge bar is hollow.

7. The iron-type golf club head according to claim 1, wherein the bridge bar comprises at least one web and at least one flange angled relative to the at least one web.

8. The iron-type golf club head according to claim 1, wherein a cross-section of the bridge bar is T-shaped.

9. The iron-type golf club head according to claim 1, wherein the bridge bar has a mass per unit length of between 0.09 g/mm and 0.25 g/mm.

10. The iron-type golf club head according to claim 1, wherein the golf club head has a coefficient of restitution (COR) greater than 0.79.

11. The iron-type golf club head according to claim 1, wherein a Z-up of the golf club head is below about 20 mm.

12. The iron-type golf club head according to claim 11, wherein a Z-up of the golf club head is below about 18 mm.

13. The iron-type golf club head according to claim 1, further comprising a channel formed in the sole portion and extending substantially parallel to the strike plate.

14. The iron-type golf club head according to claim 1, wherein the strike plate has a minimum thickness less than or equal to 2 mm.

15. The iron-type golf club head according to claim 1, further comprising a rear panel adjacent the bridge bar and covering the cavity, wherein the rear panel is made of a material different than the bridge bar.

16. The iron-type golf club head according to claim 15, wherein the bridge bar is made of a metal alloy and the rear panel is made of a non-metal material having a density between 1 g/cc and 2 g/cc.

17. The iron-type golf club head according to claim 16, wherein the non-metal material is a fiber-reinforced polymer.

18. The iron-type golf club head according to claim 1, wherein an areal mass of the rear portion of the golf club head between the topline portion, the sole portion, the toe portion, and the heel portion is between 0.0005 g/mm² and 0.00925 g/mm².

19. An iron-type golf club head, comprising:

a body comprising a heel portion, a sole portion, a toe portion, and a topline portion;

a strike plate coupled to the body at a front portion of the golf club head;

a cavity defined between the topline portion, the sole portion, and the strike plate; and

a bridge bar at a rear portion of the golf club head, the bridge bar spanning the cavity, spaced apart from the strike plate, and rigidly fixed to and extending uprightly between the sole portion and the topline portion, wherein;

the bridge bar has a mass per unit length of between 0.09 g/mm and 0.40 g/mm; and

the bridge bar increases a frequency, at which a maximum displacement of at least one location of a plurality of locations along the topline portion occurs, by at least 100 Hz.

20. The iron-type golf club head according to claim 19, wherein the bridge bar increases the frequency by at least 400 Hz.

21. The iron-type golf club head according to claim 19, wherein a first lowest frequency, at which a first maximum displacement of at least one location of the plurality of locations along the topline portion occurs, is at least 3,500 Hz.

22. The iron-type golf club head according to claim 21, wherein a fourth lowest frequency, at which a fourth maximum displacement of the at least one location of the plurality of locations along the topline portion occurs, is at least 6,000 Hz.

23. An iron-type golf club head, comprising:

a body comprising a heel portion, a sole portion, a toe portion, and a topline portion;

a strike plate coupled to the body at a front portion of the golf club head;

a cavity defined between the topline portion, the sole portion, and the strike plate; and

a bridge bar at a rear portion of the golf club head, the bridge bar spanning the cavity, spaced apart from the strike plate, and rigidly fixed to and extending uprightly between the sole portion and the topline portion, wherein;

the bridge bar has a mass per unit length of between 0.09 g/mm and 0.40 g/mm;

the iron-type golf club head with the bridge bar has;

a first frequency at which a first maximum displacement occurs;

a second frequency at which a second maximum displacement occurs;

a third frequency at which a third maximum displacement occurs; and

a fourth frequency at which a fourth maximum displacement occurs; and

removing the bridge bar decreases at least one of the first frequency, the second frequency, the third frequency, and the fourth frequency by at least 200 Hz.