US 12,121,787 B2
Golf club shafts with inserts to reduce shaft to shaft variation
Scott Cokeing, Memphis, TN (US); and Michael Parker Gardner, Memphis, TN (US)
Assigned to TRUE TEMPER SPORTS, INC., Memphis, TN (US)
Appl. No. 17/435,474
Filed by TRUE TEMPER SPORTS, INC., Memphis, TN (US)
PCT Filed Feb. 27, 2020, PCT No. PCT/US2020/020088
§ 371(c)(1), (2) Date Sep. 1, 2021,
PCT Pub. No. WO2020/180600, PCT Pub. Date Sep. 10, 2020.
Claims priority of provisional application 62/814,011, filed on Mar. 5, 2019.
Prior Publication US 2022/0134198 A1, May 5, 2022
Int. Cl. A63B 60/42 (2015.01); A63B 53/00 (2015.01); A63B 53/10 (2015.01); A63B 60/02 (2015.01)
CPC A63B 60/42 (2015.10) [A63B 53/005 (2020.08); A63B 53/10 (2013.01); A63B 60/02 (2015.10); A63B 2209/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
determining a mass of a golf shaft having a length;
determining a center of mass of the golf shaft;
determining one or more characteristics of an insert to insert into the golf shaft based on:
the mass of the golf shaft; and
a target mass for golf shafts having the length;
determining a location of the insert between a first end of the golf shaft where a golf grip is to be attached and a second end of the golf shaft where a golf club head is to be attached based on:
the center of mass of the golf shaft; and
a target center of mass for golf shafts having the length; and
inserting an insert having the determined one or more characteristics within an interior of the golf shaft at the determined location, thereby creating an interference fit between the insert and the interior of the golf shaft.