Swing Speed Training Device

Abstract

A swing speed training device and method for increasing a user's swing speed utilizes a cylindrical mass. A first aperture is disposed in the bottom portion of the mass; the first aperture has a diameter D 1 which communicates with a second aperture having a diameter D 2. The diameter D 1 is sized to accept a countersunk male threaded fastener and diameter D 2 is sized to accept a female threaded portion of a user's golf club shaft thereby facilitating a connection or a disconnection between the cylindrical mass and the user's golf club shaft.

What is claimed is: 
     
         1 . A swing speed training device comprising:
 a cylindrical mass having a diameter D and an outer cylindrical portion connected to a bottom portion, the outer cylindrical portion and the bottom portion are separated by a radiused portion, the bottom portion includes a bottom surface;   a first aperture disposed in the bottom portion, the first aperture having a diameter D 1  communicating with a second aperture having a diameter D 2  via a first countersunk flange, the diameter D 1  and the diameter D 2  are centered within the diameter D;   a tapered portion extending between outer cylindrical portion and a top portion, the top portion being connected to a flange having a top surface and a diameter D 3 , the top surface of the flange includes a third aperture having a diameter D 4 , the third aperture communicating with second aperture via a second countersunk flange; and   wherein the diameters D 1  and D 3  are larger than the diameter D 2 , the diameter D 1  being sized to accept a countersunk male threaded fastener and diameter D 2  being sized to accept a female threaded portion of a user's golf club shaft thereby facilitating a connection or a disconnection between cylindrical mass and the user's golf club shaft.   
     
     
         2 . The swing speed device of  claim 1 , wherein the user's golf club shaft is a driver shaft. 
     
     
         3 . The swing speed device of  claim 1 , wherein the diameter D 1  of the first aperture is between about 18% and about 22% of the diameter D of the cylindrical mass. 
     
     
         4 . The swing speed device of  claim 1 , wherein the diameter D 1  of the first aperture is between 20% of the diameter D of the cylindrical mass. 
     
     
         5 . The swing speed device of  claim 1 , wherein the diameter D 4  of the third aperture is between about 22% and about 26% of the diameter D of the cylindrical mass. 
     
     
         6 . The swing speed device of  claim 1 , wherein the diameter D 4  of the third aperture is about 24% of the diameter D of the cylindrical mass. 
     
     
         7 . The swing speed device of  claim 1 , wherein the first aperture extends between about 17% and about 21% of a length L between the bottom surface and the top surface. 
     
     
         8 . The swing speed device of  claim 1 , wherein the first aperture extends about 19% of a length L between the bottom surface and the top surface. 
     
     
         9 . The swing speed device of  claim 1 , wherein the third aperture extends between about 23% and about 27% of a length L between the top surface and the bottom surface. 
     
     
         10 . The swing speed device of  claim 1 , wherein the third aperture extends about 25% of a length L between the top surface and the bottom surface. 
     
     
         11 . The swing speed device of  claim 1 , wherein the cylindrical mass has a mass of between about 130 g and about 150 g. 
     
     
         12 . The swing speed device of  claim 1 , wherein the cylindrical mass has a mass of about 140 g. 
     
     
         13 . The swing speed device of  claim 1 , wherein the first, second, and third apertures are colinear and centered on the diameters D, D 1 , D 2 , D 3  and D 4  and on the centerline CL of axis A 1  respectively. 
     
     
         14 . A method of increasing a user's golf club swing speed comprising:
 removing a golf club head from a user's golf club shaft;   replacing the golf club head with a swing speed training device, the swing speed training device including a cylindrical mass having a diameter D and an outer cylindrical portion connected to a bottom portion, the outer cylindrical portion and the bottom portion are separated by a radiused portion, the bottom portion includes a bottom surface;   a first aperture disposed in the bottom portion, the first aperture having a diameter D 1  communicating with a second aperture having a diameter D 2  via a first countersunk flange, the diameter D 1  and the diameter D 2  are centered within the diameter D;   a tapered portion extending between outer cylindrical portion and a top portion, the top portion being connected to a flange having a top surface and a diameter D 3 , the top surface of the flange includes a third aperture having a diameter D 4 , the third aperture communicating with second aperture via a second countersunk flange;   wherein the diameters D 1  and D 3  are larger than the diameter D 2 , the diameter D 1  being sized to accept a countersunk male threaded fastener and diameter D 2  being sized to accept a female threaded portion of the user's golf club shaft thereby facilitating a connection or a disconnection between cylindrical mass and the user's golf club shaft; and   swinging the user's golf club shaft having the swing speed training device attached.   
     
     
         15 . The method of  claim 14 , further including the step of removing the swing speed training device from the user's golf club shaft. 
     
     
         16 . The method of  claim 15 , further including replacing the user's golf club head on the user's golf club shaft. 
     
     
         17 . The method of  claim 16 , further including the step of swinging the user's golf club shaft thereby increasing the user's swing speed. 
     
     
         18 . The method of  claim 14 , wherein the golf club head is a driver head and the user's golf club shaft is a driver shaft. 
     
     
         19 . The method of  claim 14 , wherein the cylindrical mass has a mass of between about 130 g and about 150 g. 
     
     
         20 . The method of  claim 14 , wherein the user has an increased swing speed of about 7 miles per hour faster than an initial swing speed.