US2021187366A1PendingUtilityA1

Golf club head

48
Assignee: BRIDGESTONE SPORTS CO LTDPriority: Dec 20, 2019Filed: Nov 25, 2020Published: Jun 24, 2021
Est. expiryDec 20, 2039(~13.4 yrs left)· nominal 20-yr term from priority
Inventors:Hiroshi TakahashiTakaharu Takechi
A63B 53/0437A63B 53/045A63B 53/0466A63B 60/52
48
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A hollow golf club head that includes a face portion, a crown portion, a sole portion, a side portion, and a hosel portion. The head includes a first metal member configured to form the face portion and at least a part of the crown portion, and a second metal member configured to form the sole portion, the side portion, and the hosel portion, and to which the first metal member is joined. The first metal member is a forged member including at least one groove portion. The second metal member is a cast member including at least one reinforcing rib.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A hollow golf club head that includes a face portion, a crown portion, a sole portion, a side portion, and a hosel portion, comprising:
 a first metal member configured to form the face portion and at least a part of the crown portion; and   a second metal member configured to form the sole portion, the side portion, and the hosel portion, and to which the first metal member is joined,   wherein the first metal member is a forged member including at least one groove portion, and   the second metal member is a cast member including at least one reinforcing rib.   
     
     
         2 . The golf club head according to  claim 1 , wherein
 the first metal member is configured to form the entire crown portion except a part in a periphery of the hosel portion.   
     
     
         3 . The golf club head according to  claim 2 , wherein
 the first metal member and the second metal member are joined at one continuous joining line.   
     
     
         4 . The golf club head according to  claim 2 , wherein
 in a range of not less than 70% of a contour line excluding the hosel portion in a planar view of the golf club head, a joining line between the first metal member and the second metal member is along the contour line.   
     
     
         5 . The golf club head according to  claim 1 , wherein
 the at least one groove portion includes   a first groove portion, and   a second groove portion formed on a back side of the first groove portion in a face-back direction.   
     
     
         6 . The golf club head according to  claim 5 , wherein
 the first groove portion is formed in an outer surface of the crown portion, and   the second groove portion is formed in an inner surface of the crown portion.   
     
     
         7 . The golf club head according to  claim 1 , wherein
 the at least one reinforcing rib includes a reinforcing rib formed on an inner surface of a boundary portion between the sole portion and the face portion.   
     
     
         8 . The golf club head according to  claim 1 , wherein
 the at least one reinforcing rib includes a reinforcing rib formed on an inner surface of a boundary portion between the side portion on a back side and the crown portion.   
     
     
         9 . The golf club head according to  claim 1 , wherein
 the at least one reinforcing rib includes a reinforcing rib formed on an outer surface of the sole portion.

Join the waitlist — get patent alerts

Track US2021187366A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.