Patent ID: 11896880
Assignee: KARSTEN MANUFACTURING CORPORATION
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 15:
16. The putter shaft of claim 14, wherein:
the putter shaft comprises a characteristic ratio selected from the group consisting of: a frequency ratio (RF), a torsional stiffness ratio (RT), and a stiffness ratio (RS);
the frequency ratio (RT) ranges inclusively between 5.5 and 8;
the frequency ratio (RT) is calculated by the following equation:, R
      F
    
    =
    
      Frequency
      
        
          10
          ⁢
          
            ,
          
          ⁢
          0
          ⁢
          0
          ⁢
          0
          ×
          
            (
            
              Tip
              ⁢
              
                
              
              ⁢
              OD
            
            )
          
        
        +
        
          Shaft
          ⁢
          
            
          
          ⁢
          Mass
        
      
    
  
  ;

the torsional stiffness ratio (RT) ranges inclusively between 0.004 and 0.010;
the torsional stiffness ratio (RT) is calculated by the following equation:, R
      T
    
    =
    
      
        Torsional
        ⁢
        
          
        
        ⁢
        Stiffness
      
      
        
          10
          ⁢
          
            ,
          
          ⁢
          0
          ⁢
          0
          ⁢
          0
          ×
          
            (
            
              Tip
              ⁢
              
                
              
              ⁢
              OD
            
            )
          
        
        +
        
          Shaft
          ⁢
          
            
          
          ⁢
          Mass
        
      
    
  
  ;

the stiffness ratio (RS) ranges inclusively between 650 and 1600; and
the stiffness ratio (RS) is calculated by the following equation:, R
    S
  
  =
  
    
      Frequency
      
        Torsional
        ⁢
        
          
        
        ⁢
        Stiffness
      
    
    .