Golf club ferrules and methods to manufacture golf club ferrules

Abstract

Embodiments of golf club ferrules and methods to manufacture golf club ferrules are generally described herein. In one example, a ferrule includes an upper portion, a lower portion, and a transition portion between the upper portion and the lower portion. A plurality of protrusions extend vertically across the lower portion and the transition portion. A plurality of windows are formed through the lower portion. The upper portion, the lower portion, and the transition portion are coaxially aligned to define an axial bore. The plurality of protrusions and the plurality of windows are alternatingly spaced apart. Other examples and embodiments may be described and claimed.

1 . A ferrule for a golf club, comprising:
 an upper portion having a frustoconical shape and defining a lower annular ledge;   a transition portion having a funnel shape, the transition portion extending downward from the upper portion and disposed inward of the lower annular ledge;   a lower portion having a cylindrical shape and extending downward from the transition portion;   a plurality of protrusions disposed about the transition portion and the lower portion; and   a plurality of windows formed through the lower portion,   wherein the upper portion, the lower portion, and the transition portion are coaxially aligned to define an axial bore,   wherein each protrusion of the plurality of protrusions increases in height toward the upper portion,   wherein each protrusion of the plurality of protrusions is elongate and wedge-shaped,   wherein the plurality of windows interface with the axial bore, and   wherein each window of the plurality of windows is disposed between adjacent protrusions of the plurality of protrusions.   
     
     
         2 . A ferrule as defined in  claim 1 , wherein each protrusion of the plurality of protrusions has a triangular cross-section. 
     
     
         3 . A ferrule as defined in  claim 1 , wherein each protrusion of the plurality of protrusions includes a slanted lower end. 
     
     
         4 . A ferrule as defined in  claim 1 , wherein the plurality of windows have an oval-like shape. 
     
     
         5 . A ferrule as defined in  claim 1 , wherein the upper portion extends a length that is greater than or equal to 65% and less than or equal to 75% of a length of the ferrule. 
     
     
         6 . A ferrule as defined in  claim 1 , wherein the transition portion extends a length that is less than or equal to 8% of a length of the ferrule. 
     
     
         7 . A ferrule as defined in  claim 1 , wherein the lower portion extends a length that is greater than or equal to 20% and less than or equal to 30% of a length of the ferrule. 
     
     
         8 . A ferrule for a golf club, comprising:
 an upper portion;   a lower portion;   a transition portion between the upper portion and the lower portion;   a plurality of protrusions extending vertically across the lower portion and the transition portion; and   a plurality of windows formed through the lower portion,   wherein each protrusion of the plurality of protrusions increases in height toward the upper portion,   wherein each protrusion of the plurality of protrusions is elongate and wedge-shaped, and   wherein the plurality of protrusions and the plurality of windows are alternatingly spaced apart about the lower portion.   
     
     
         9 . A ferrule as defined in  claim 8 , wherein the upper portion has a frustoconical shape and the lower portion has a cylindrical shape. 
     
     
         10 . A ferrule as defined in  claim 8 , wherein the plurality of protrusions have a slanted lower end. 
     
     
         11 . A ferrule as defined in  claim 8 , wherein the plurality of windows have an oval-like shape. 
     
     
         12 . A ferrule as defined in  claim 8 , wherein the plurality of protrusions and the plurality of windows are equal in number. 
     
     
         13 . A ferrule as defined in  claim 8 , wherein each protrusion of the plurality of protrusions has a triangular cross-section. 
     
     
         14 . A ferrule for a golf club, comprising:
 an upper portion;   a lower portion located below the upper portion;   a plurality of protrusions located at the lower portion; and   a plurality of windows formed through the lower portion,   wherein each protrusion of the plurality of protrusions increases in height toward the upper portion,   wherein each protrusion of the plurality of protrusions is elongate and wedge-shaped, and   wherein the plurality of protrusions and the plurality of windows are disposed to alternate about the lower portion.   
     
     
         15 . A ferrule as defined in  claim 14 , wherein each protrusion of the plurality of protrusions has a triangular cross-section. 
     
     
         16 . A ferrule as defined in  claim 14 , wherein the plurality of protrusions extend vertically across the lower portion. 
     
     
         17 . A ferrule as defined in  claim 14 , wherein the plurality of protrusions have a slanted lower end. 
     
     
         18 . A ferrule as defined in  claim 14 , wherein the plurality of windows have an oval-like shape. 
     
     
         19 . A ferrule as defined in  claim 14 , wherein the upper portion has a frustoconical shape. 
     
     
         20 . A ferrule as defined in  claim 14 , wherein the lower portion has a cylindrical shape.