US 11,850,486 B2
Adjustable length shaft and an adjustable mass for a golf club
Travis D. Milleman, Portland, OR (US); Anthony D. Serrano, Phoenix, AZ (US); Eric V. Cole, Phoenix, AZ (US); David S. Kultala, Phoenix, AZ (US); David L Petersen, Peoria, AZ (US); Les J. Bryant, Peoria, AZ (US); Richard D. MacMillan, Glendale, AZ (US); Rick Solesbee, Phoenix, AZ (US); John A. Solheim, Phoenix, AZ (US); and Evan R. Greer, Phoenix, AZ (US)
Assigned to Karsten Manufacturing Corporation, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Feb. 22, 2022, as Appl. No. 17/652,061.
Application 17/652,061 is a continuation of application No. 16/539,890, filed on Aug. 13, 2019, granted, now 11,278,780.
Application 16/539,890 is a continuation in part of application No. 15/165,889, filed on May 26, 2016, granted, now 10,675,521, issued on Jun. 9, 2020.
Claims priority of provisional application 62/718,298, filed on Aug. 13, 2018.
Claims priority of provisional application 62/303,429, filed on Mar. 4, 2016.
Claims priority of provisional application 62/258,837, filed on Nov. 23, 2015.
Claims priority of provisional application 62/220,013, filed on Sep. 17, 2015.
Claims priority of provisional application 62/167,833, filed on May 28, 2015.
Prior Publication US 2022/0176216 A1, Jun. 9, 2022
Int. Cl. A63B 60/28 (2015.01); A63B 53/08 (2015.01); A63B 53/00 (2015.01); A63B 53/04 (2015.01); B25B 23/142 (2006.01); B25B 23/14 (2006.01)
CPC A63B 60/28 (2015.10) [A63B 53/08 (2013.01); A63B 53/007 (2013.01); A63B 53/047 (2013.01); A63B 53/0466 (2013.01); A63B 2053/0479 (2013.01); A63B 2225/09 (2013.01); B25B 23/141 (2013.01); B25B 23/1427 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A golf club comprising:
a first shaft coupled to a club head;
a second shaft configured to slidably engage a portion of the first shaft;
a grip coupled to the second shaft; and
an adjustable length shaft assembly at least partially positioned within the second shaft and configured to permit a portion of the first shaft to slide in relation to the second shaft, the adjustable length shaft assembly comprising:
an insert coupled to an axial end face of the first shaft, the insert comprising a threaded aperture and a tubular portion devoid of threads; and
a threaded screw configured to threadably engage with the threaded aperture of the insert, the threaded screw configured to rotate, wherein in response to rotation of the threaded screw, the insert travels along the threaded screw and supports the first shaft to allow the first shaft to slide in relation to the second shaft to adjust a length of the golf club;
wherein the threaded screw is received by a retainer, the retainer configured to remain static with respect to the second shaft and allows for a rotation of the threaded screw;
wherein the insert is positioned away from the retainer in an expanded configuration, and the insert abuts the retainer in a fully contracted configuration;
wherein at least one of an outer surface of the insert or an outer surface of the retainer comprise a plurality of nodal protrusions; and
wherein the grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.