US 12,122,110 B1
Process for manufacturing a bi-material shaft
Grace Hohn, Carlsbad, CA (US); Norm Smith, Oceanside, CA (US); and Augustin W. Rollinson, Solana Beach, CA (US)
Assigned to Topgolf Callaway Brands Corp., Carlsbad, CA (US)
Filed by Topgolf Callaway Brands Corp., Carlsbad, CA (US)
Filed on Mar. 17, 2023, as Appl. No. 18/123,155.
Application 18/123,155 is a continuation of application No. 17/591,098, filed on Feb. 2, 2022, granted, now 11,608,846.
Application 17/591,098 is a continuation of application No. 16/672,184, filed on Nov. 1, 2019, granted, now 11,248,641, issued on Feb. 15, 2022.
Application 16/672,184 is a continuation in part of application No. 16/368,346, filed on Mar. 28, 2019, granted, now 10,486,036, issued on Nov. 26, 2019.
Claims priority of provisional application 62/755,668, filed on Nov. 5, 2018.
Claims priority of provisional application 62/654,052, filed on Apr. 6, 2018.
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 53/10 (2015.01); B29D 23/00 (2006.01); A63B 53/00 (2015.01)
CPC B29D 23/00 (2013.01) [A63B 53/007 (2013.01); A63B 53/10 (2013.01); A63B 2209/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for manufacturing a bi-material shaft for a golf club, the method comprising:
preparing a mix of adhesive and glass beads;
bonding a cleaned cut steel shaft to a prepared graphite shaft with the mix of adhesive and glass beads to form an uncured bi-material shaft;
curing the uncured bi-material shaft to form a cured bi-material shaft;
trimming a ferrule of the cured bi-material shaft; and
finishing the cured bi-material shaft;
wherein the cured bi-material shaft comprises a graphite section which is from 60 to 80 percent of the length of the cured bi-material shaft and the graphite section is less than 50 percent of a mass of the cured bi-material shaft.