US 12,246,228 B1
Additive manufacturing for golf club shaft
Bryce W. Hobbs, Carlsbad, CA (US)
Assigned to Cobra Golf Incorporated, Carlsbad, CA (US)
Filed by Cobra Golf Incorporated, Carlsbad, CA (US)
Filed on Apr. 12, 2022, as Appl. No. 17/719,013.
Application 17/719,013 is a continuation of application No. 16/815,303, filed on Mar. 11, 2020, granted, now 11,298,600.
Claims priority of provisional application 62/821,549, filed on Mar. 21, 2019.
Int. Cl. B33Y 10/00 (2015.01); A63B 53/10 (2015.01); B33Y 80/00 (2015.01)
CPC A63B 53/10 (2013.01) [B33Y 10/00 (2014.12); A63B 2209/02 (2013.01); B33Y 80/00 (2014.12)] 15 Claims
OG exemplary drawing
 
1. A method for printing a golf club shaft, comprising the steps of:
a) receiving a model of the golf club shaft, the golf club shaft comprising:
an extended body defining a longitudinal axis that extends centrally through a top and bottom of the golf club shaft, and through which a plane extends, the plane defining a first side of the extended body and a second side of the extended body; and
a core within the extended body, the core comprising a lattice structure integrally formed with the extended body,
wherein the lattice structure extends from an inner surface of the extended body along the first side thereof to the inner surface along the second side thereof,
wherein at least a portion of the lattice structure extends through the longitudinal axis, and
wherein the top of the golf club shaft is coextensive with a top of the lattice structure,
b) providing an additive manufacturing system; and
c) manufacturing the golf club shaft, including the core within the extended body, based on the model using the additive manufacturing system, wherein the core comprises the lattice structure, and wherein the lattice structure has a plurality of segments that extend from the inner surface along the first side of the extended body to the inner surface along the second side of the extended body.