Twisted tennis racket frame

Abstract

A twisted tennis racket frame includes a handle, two supporting arms having outside surfaces facing reverse directions, and an annular-shaped head provided on an imaginary plane with large and small arc portions. The large arc portion has an external arc surface, which composes a continuous curved surface with the outside surfaces of the two supporting arms. The continuous curved surface has at least one twisted section having a starting end located at the large arc portion and faces toward a first facing direction that is situated on the imaginary plane, and a terminal end connected with the handle and faces toward a second facing direction. The included angle between the first and second facing directions is larger than 0 degree and not larger than 180 degrees. As a result, the racket performs well in controlling the ball and enables the user to turn the hitting surface quickly.

What is claimed is: 
     
         1 . A twisted tennis racket frame comprising:
 a handle ( 20 );   two supporting arms ( 30 ) extended from an end ( 21 ) of the handle ( 20 ) and each having an inside surface ( 31 ) and an outside surface ( 32 ), the inside surfaces ( 31 ) of the two supporting arms ( 30 ) facing each other, the outside surfaces ( 32 ) of the two supporting arms ( 30 ) facing reverse directions; and   a head ( 40 ) which is annular-shaped and provided on an imaginary plane ( 50 ) with a large arc portion ( 41 ), which is C-shaped and has two ends ( 42 ) connected with ends of the two supporting arms ( 30 ) respectively, and a small arc portion ( 45 ) connected with the two ends ( 42 ) of the large arc portion ( 41 ), the large arc portion ( 41 ) having an external arc surface ( 43 ) and an internal arc surface ( 44 ), the external arc surface ( 43 ) and the outside surfaces ( 32 ) of the two supporting arms ( 30 ) composing a continuous curved surface ( 60 );   wherein the continuous curved surface ( 60 ) has at least one twisted section ( 70 ) provided with a starting end ( 71 ), which is located at the large arc portion ( 41 ) of the head ( 40 ) and faces toward a first facing direction ( 81 ) that is situated on the imaginary plane ( 50 ), and a terminal end ( 72 ), which is connected with the handle ( 20 ) and defined with a second facing direction ( 82 ), an included angle between the second facing direction ( 82 ) and the first facing direction ( 81 ) being larger than 0 degree and not larger than 180 degrees.   
     
     
         2 . The twisted tennis racket frame as claimed in  claim 1 , wherein the starting end ( 71 ) of the twisted section ( 70 ) is located at a juncture of the large arc portion ( 41 ) of the head ( 40 ) and the supporting arm ( 30 ). 
     
     
         3 . The twisted tennis racket frame as claimed in  claim 1 , wherein the starting end ( 71 ) of the twisted section ( 70 ) is located at a side end ( 46 ) of the large arc portion ( 41 ) of the head ( 40 ). 
     
     
         4 . The twisted tennis racket frame as claimed in  claim 1 , wherein the included angle between the first facing direction ( 81 ) and the second facing direction ( 82 ) is substantially equal to 90 degrees. 
     
     
         5 . The twisted tennis racket frame as claimed in  claim 4 , wherein a juncture of one of the two supporting arms ( 30 ) and the handle ( 20 ) is located above the imaginary plane ( 50 ) and a juncture of the other supporting arm ( 30 ) and the handle ( 20 ) is located below the imaginary plane ( 50 ). 
     
     
         6 . The twisted tennis racket frame as claimed in  claim 1 , wherein the continuous curved surface ( 60 ) has two said twisted sections ( 70 ). 
     
     
         7 . The twisted tennis racket frame as claimed in  claim 6 , wherein the included angle between the first facing direction ( 81 ) and the second facing direction ( 82 ) of one of the twisted sections ( 70 ) is equal to the included angle between the first facing direction ( 81 ) and the second facing direction ( 82 ) of the other twisted section ( 70 ).