US 11,738,244 B2
Club head having balanced impact and swing performance characteristics
Ryan M. Stokke, Anthem, AZ (US); and Sina Ghods, Phoenix, AZ (US)
Assigned to Karsten Manufacturing Corporation, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Jun. 13, 2022, as Appl. No. 17/839,389.
Application 17/839,389 is a continuation of application No. 17/121,501, filed on Dec. 14, 2020, granted, now 11,358,037, issued on Jun. 14, 2022.
Application 17/121,501 is a continuation of application No. 16/747,384, filed on Jan. 20, 2020, granted, now 10,864,413, issued on Dec. 15, 2020.
Application 16/747,384 is a continuation of application No. 16/242,464, filed on Jan. 8, 2019, granted, now 10,556,159, issued on Feb. 11, 2020.
Application 16/242,464 is a continuation of application No. 15/815,589, filed on Nov. 16, 2017, granted, now 10,207,161, issued on Feb. 19, 2019.
Claims priority of provisional application 62/469,911, filed on Mar. 10, 2017.
Claims priority of provisional application 62/449,403, filed on Jan. 23, 2017.
Claims priority of provisional application 62/423,878, filed on Nov. 18, 2016.
Prior Publication US 2022/0362638 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 53/04 (2015.01); A63B 60/02 (2015.01); A63B 60/00 (2015.01)
CPC A63B 53/0466 (2013.01) [A63B 53/0408 (2020.08); A63B 53/0412 (2020.08); A63B 53/0433 (2020.08); A63B 53/0437 (2020.08); A63B 53/0445 (2020.08); A63B 60/006 (2020.08); A63B 60/02 (2015.10); A63B 2053/0491 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hollow body golf club head comprising:
a body having a front end, a back end opposite the front end, a crown, a sole opposite the crown, a heel, a toe opposite the heel, a skirt adjoining the crown and the sole, and a hosel structure having a hosel axis extending centrally through a bore in the hosel structure;
a strikeface positioned at the front end and defining a geometric center, a loft plane tangent to the geometric center, and a head depth plane extending through the geometric center from the heel to the toe, perpendicular to the loft plane;
wherein:
a volume of the golf club head is greater than 400 cc;
a loft angle of the club head is less than 16 degrees;
a head center of gravity of the club head is located at a head CG depth from the loft plane, measured in a direction perpendicular to the loft plane, and at a head CG height from a head depth plane, measured in a direction perpendicular to the head depth plane;
the head CG depth is greater than 1.35 inches;
the club head experiences a drag force FD less than 1.4 lbf when subjected to an air speed of 102 mph in a direction perpendicular to a plane extending through the geometric center of the strikeface, parallel to the hosel axis, and positioned at the loft angle from the loft plane;
the club head has a crown-to-sole moment of inertia Ixx, a heel to toe moment of inertia Iyy, and a combined moment of inertia measured as the sum of the crown-to-sole moment of inertia and the heel to toe moment of inertia Ixx+Iyy;
the club head has a front radius of curvature between 0.2 inches and 0.3 inches wherein the front radius of curvature extends from a top edge of the strikeface to a crown transition point, the crown transition point indicating a change in curvature from the front radius of curvature to a different curvature of the crown;
the club head has a crown angle less than 79 degrees, wherein the crown angle is measured as the acute angle between a front plane and a crown axis that extends through the crown transition point of the club head;
the club head has a maximum crown height between 0.4 and 0.5 inches wherein the maximum crown height is measured as the greatest distance between a surface of the crown and the crown axis;
the club head further comprising an embedded weight comprising a weight center positioned at one or more of the following locations:
(a) within 0.4 inches of a perimeter of the club head;
(b) greater than 2.3 inches from the head center of gravity; or
(c) greater than 4.1 inches from the geometric center of the strikeface; and
the club head satisfies relation A and B:

OG Complex Work Unit Math