US2016166891A1PendingUtilityA1

Golf club head

39
Assignee: BRIDGESTONE SPORTS CO LTDPriority: Dec 10, 2014Filed: Oct 5, 2015Published: Jun 16, 2016
Est. expiryDec 10, 2034(~8.4 yrs left)· nominal 20-yr term from priority
Inventors:Tadahiro NaritaWataru Ban
A63B 2053/0437A63B 53/08A63B 53/0466A63B 2053/0408A63B 53/0408A63B 2225/01A63B 53/0437A63B 2071/0694A63B 60/006A63B 53/02
39
PatentIndex Score
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Claims

Abstract

A golf club head of the present invention includes a crown portion, a face portion, and a hosel portion. The crown portion includes a turbulence-promoting portion that extends from a heel side to a toe side and a back side.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A golf club head comprising a crown portion, a face portion, and a hosel portion, wherein
 said crown portion includes a turbulence-promoting portion that extends from a heel side to a toe side and a back side.   
     
     
         2 . The golf club head according to  claim 1 , wherein a region of said crown portion on a side of said face portion with respect to said turbulence-promoting portion is smoother than said turbulence-promoting portion. 
     
     
         3 . The golf club head according to  claim 1 , wherein said crown portion includes at least one other turbulence-promoting portion on the back side with respect to said turbulence-promoting portion. 
     
     
         4 . The golf club head according to  claim 1 , wherein said turbulence-promoting portion extends in one of a line shape or a band shape. 
     
     
         5 . The golf club head according to  claim 1 , wherein an arithmetic mean roughness Ra of said turbulence-promoting portion is 2 μm (inclusive) to 30 μm (inclusive). 
     
     
         6 . The golf club head according to  claim 1 , wherein a concave portion is formed in an outer surface of said hosel portion on the toe side. 
     
     
         7 . The golf club head according to  claim 1 , wherein an angle between a toe-heel direction and a virtual line that connects a heel end and a sole end of said turbulence-promoting portion is 5 degrees (inclusive) to 50 degrees (inclusive). 
     
     
         8 . The golf club head according to  claim 1 , wherein a region of said crown portion on the back side with respect to said turbulence-promoting portion is smoother than said turbulence-promoting portion. 
     
     
         9 . The golf club head according to  claim 1 , wherein said turbulence-promoting portion extends from a base portion of said hosel portion to a toe-side circumferential edge of said crown portion. 
     
     
         10 . The golf club head according to  claim 1 , wherein said turbulence-promoting portion passes the back side of a top of said crown portion.

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