	US 12,343,605 B2
	Golf club set having similar properties
Raymond J. Sander, Benbrook, TX (US); Robert M. Boyd, Flower Mound, TX (US); and John T. Stites, Sallisaw, OK (US)
Assigned to Karsten Manufacturing Corporation, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Jan. 11, 2021, as Appl. No. 17/146,312.
Application 17/146,312 is a continuation of application No. 16/058,872, filed on Aug. 8, 2018, abandoned.
Application 16/058,872 is a continuation of application No. 14/721,720, filed on May 26, 2015, granted, now 10,065,087, issued on Sep. 4, 2018.
Prior Publication US 2022/0016494 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 53/04 (2015.01); A63B 53/00 (2015.01)

CPC A63B 53/047 (2013.01) [A63B 53/00 (2013.01); A63B 53/0466 (2013.01); A63B 53/005 (2020.08); A63B 53/0408 (2020.08)]

9 Claims

1. A set of golf clubs comprising:

a plurality of iron-type golf clubs, each iron-type golf club comprising:

an iron-type golf club head having a striking face configured for striking a ball, a body extending rearwardly from the striking face, and a face thickness, the body having a top surface, a sole, a heel, and a toe, and a hosel including a hosel axis, wherein the iron-type golf club head is perimeter-weighted and includes a rear cavity;

a shaft configured to engage with the iron-type golf club head at a first end and a grip engaged with the shaft at a second end opposite the first end;

wherein each of the plurality of iron-type golf clubs has a length, a lie angle, a weight, a swing weight, and a center of gravity;

wherein each of the plurality of iron-type golf clubs includes an iron-type golf club ground plane origin point located at the point at which the ground plane and the hosel axis intersect and a hosel origin point located on the hosel axis and coincident with an uppermost edge of the hosel; and

wherein each of the plurality of iron-type golf club heads comprises an x-axis, a y-axis, and a z-axis that pass through the iron-type golf club ground plane origin point; wherein:

the x-axis is parallel to the ground plane and parallel to the striking face;

the y-axis is perpendicular to the x-axis and extending rearwardly from the striking face; and

the z-axis is perpendicular to the ground plane and extending in a direction from the sole to the top surface; and

wherein each of the plurality of iron-type golf clubs further comprises an x′-axis, a y′-axis, and a z′-axis that pass through the hosel origin point; wherein:

the z′-axis extends along the direction of an axis of the shaft,

the y′-axis is perpendicular to the z′-axis and extends toward a rear of the golf club head; and

the x′-axis extends perpendicular to the y′-axis and the z′-axis; and

a distance ΔX is measured from the center of gravity to the z′-axis, along an axis parallel to the x′-axis, and a distance ΔY is measured from the center of gravity to the z′-axis along an axis parallel to the y′-axis;

wherein each of the plurality of iron-type golf clubs has a different loft angle in the range of 23 degrees to 60 degrees;

wherein the lengths are substantially equal; and

wherein the lie angles are substantially equal; and

wherein each iron-type golf club has a different face thickness than all other clubs within the set; and

wherein the plurality of iron type golf clubs comprises:

a first iron-type golf club having a first loft angle and a first face thickness; and

a second iron-type golf club having a second loft angle and a second face thickness;

wherein the second loft angle is greater than the first loft angle; and

wherein the second face thickness is greater than the first face thickness;

wherein a distance between the center of gravity is within 2 mm of a distance between the iron-type golf club ground plane origin point in the y-axis direction for the plurality of iron-type golf clubs; and

wherein each of the iron-type golf club heads has a moment of inertia with respect to the hosel axis within about 200 g*cm²of each other;

wherein each of the plurality of iron-type golf club heads has a ratio of a center of gravity location measured from the hosel origin point ΔX to ΔY that is within a range of 2.6 to 3.0;

wherein the first iron-type club has a loft angle in the range of 24 degrees to 28 degrees, and the second iron-type club has a loft angle in the range of 48 degrees to 54 degrees.