US2016250529A1PendingUtilityA1

Golf club with improved weighting

Assignee: ACUSHNET COPriority: Feb 26, 2015Filed: Apr 10, 2015Published: Sep 1, 2016
Est. expiryFeb 26, 2035(~8.6 yrs left)· nominal 20-yr term from priority
A63B 2053/005A63B 53/10A63B 60/24A63B 60/002A63B 53/005
47
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Claims

Abstract

A plurality of two or more golf clubs with improved weighting characteristics is disclosed. More specifically, the present invention discloses a specific relationship between the mass M club of the golf club and the length L club to help improve the performance of the golf club. In addition to the above, the present invention also discloses a change to the balance point of the shaft to help compensate for the change in mass M shaft of the shaft and the length L shaft of the shaft to maintain a desirable swing weight.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A golf club shaft comprising;
 a first end, a second end, an inner diameter, and an outer diameter;   wherein a mass M shaft  of said shaft deceases with an increase in a length L shaft  of said shaft, and   wherein said shaft has a Balance Point shaft  that increases as the length L shaft  increases according to the relationship, Balance Point shaft  (%) 0.1 L shaft +26.33.   
     
     
         2 . The golf club shaft of  claim 1 , wherein said relationship between said Balance Point shaft  and said length L shaft  is, Balance Point shaft  (%) 0.3 L shaft +26.33. 
     
     
         3 . The golf club shaft of  claim 2 , wherein said relationship between said Balance Point shaft  and said length L shaft  is, Balance Point shaft  (%) 0.5 L shaft +26.33. 
     
     
         4 . The golf club shaft of  claim 1 , wherein a relationship between a mass of the shaft M shaft  and the length L shaft  is, M shaft ≧−6 L shaft +347. 
     
     
         5 . The golf club of  claim 4 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−15 L shaft +2367.5. 
     
     
         6 . The golf club of  claim 5 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in the length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−20 L shaft +2367.5. 
     
     
         7 . The golf club of  claim 6 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in the length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−30 L shaft +2367.5. 
     
     
         8 . The golf club of  claim 4 , wherein said mass of said shaft M shaft  is between about 104 grams to about 128 grams. 
     
     
         9 . A plurality of golf club shafts comprising:
 a first golf club shaft having a length of greater than about 39.5 inches having a first shaft mass;   a second golf club shaft having a length of between about 37.5 inches to 39.5 inches having a second shaft mass;   a third golf club shaft having a length of less than about 37.5 inches having a third shaft mass;   wherein the first shaft mass is less than said second shaft mass and said second shaft mass is less than said third shaft mass;   wherein said first golf club shaft, said second golf club shaft, and said third golf club shaft, all have a Balance Point shaft  that increases as the length L shaft  increases according to the relationship, Balance Point shaft  (%)≧0.1 L shaft +26.33.   
     
     
         10 . The plurality of golf club shafts of  claim 9 , wherein said relationship between said Balance Point shaft  and said length L shaft  is, Balance Point shaft  (%)≧0.3 L shaft +26.33. 
     
     
         11 . The plurality of golf club shafts of  claim 10 , wherein said relationship between said Balance Point shaft  and said length L shaft  is, Balance Point shaft  (%)≧0.5 L shaft +26.33. 
     
     
         12 . The plurality of golf club shafts of  claim 9 , wherein a relationship between said first shaft mass, said second shaft mass, and said third shaft mass and their respective shaft length is, M shaft ≧−6 L shaft +347. 
     
     
         13 . The plurality of golf club shafts of  claim 12 , wherein said first shaft, said second shaft, and said third shaft all have a tip frequency shaft  that decreases inversely with an increase in length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−15 L shaft +2367.5. 
     
     
         14 . A golf club shaft comprising;
 a first end, a second end, an inner diameter, and an outer diameter;   wherein a mass M shaft  of said shaft deceases with an increase in a length L shaft  of said shaft, and   wherein a relationship between a mass of the shaft M shaft  and the length L shaft  is, M shaft ≧−6 L shaft +347, and   wherein said shaft has a tip frequency shaft greater than about 800 CPM.   
     
     
         15 . The golf club shaft of  claim 14 , wherein said tip frequency shaft  greater than about 850 CPM. 
     
     
         16 . The golf club shaft of  claim 15 , wherein said tip frequency shaft  greater than about 900 CPM. 
     
     
         17 . The golf club shaft of  claim 14 , wherein said shaft has a Balance Point shaft  that increases as the length L shaft  increases according to the relationship, Balance Point shaft  (%)≧0.1 L shaft +26.33. 
     
     
         18 . The golf club shaft of  claim 17 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−15 L shaft +2367.5. 
     
     
         19 . The golf club shaft of  claim 18 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−20 L shaft +2367.5. 
     
     
         20 . The golf club shaft of  claim 19 , wherein said shaft has a tip frequency shaft  that decreases inversely with an increase in length L shaft  according to the relationship, Tip Frequency shaft  (CPM)≦−30 L shaft +2367.5.

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