Rotational Forearm Exercise Apparatus

Abstract

A rotational forearm exercise apparatus including a pair of bar members rotationally connected endwise together at a midpoint. Each of the pair of bar members is rotational relative the other against action of a compressive spring member disposed around a threaded bolt member interior to at least one of the pair of bar members. Rotation of each of the pair of bar members in a first direction relative one another forces travel of a threaded washer along the length of the threaded bolt member toward the midpoint whereby the spring member is compressed. Rotation of each of the pair of bar members in a second direction relative one another forces travel of the washer along the length of the threaded bolt member away from the midpoint whereby the spring member is decompressed. Force required to rotate the pair of bar members is thus increasable and decreasable.

What is claimed is: 
     
         1 . A rotational forearm exercise apparatus comprising:
 a pair of bar members endwise connected rotationally at a midpoint;   a threaded bolt member longitudinally disposed interiorly within at least one of the pair of bar members; and   a compressive spring member disposed about the threaded bolt member;   wherein rotation of the pair of bar members relative one another in a first direction effects increased compression of the spring member and rotation of the pair of bar members relative one another in a second direction decompresses the spring member whereby force required to manually rotate each of the pair of bar members relative one another is increasable.   
     
     
         2 . The rotational forearm exercise apparatus of  claim 1  wherein the threaded bolt member includes a first end and a second end, said first end disposed through the midpoint and secured into the other of the pair of bar members, wherein the compressive spring member is disposed between the first and second ends interior to one of the pair of bar members. 
     
     
         3 . The rotational forearm exercise apparatus of  claim 2  further comprising a threaded washer fixedly disposed interior to one of the pair of bar members, said threaded washer disposed engaged around the second end of the threaded bolt member, wherein rotation of the pair of bar members relative each other in a first direction effects travel of the washer along the length of the threaded bolt member toward the midpoint, whereby the compressive spring member is compressed, and rotation of the pair of bar members relative each other in a second direction effects travel of the washer along the length of the threaded bolt member away from the midpoint, whereby the compressive spring member is decompressed. 
     
     
         4 . The rotational forearm exercise apparatus of  claim 3  further comprising a compressible friction washer between each of the pair of bar members at the midpoint. 
     
     
         5 . The rotational forearm exercise apparatus of  claim 4  further comprising a first annulus disposed endwise upon one of the pair of bar members and a second annulus disposed endwise upon the other of the pair of bar members, each of said first annulus and said second annulus disposed upon either side of the friction washer and rotatable thereabouts. 
     
     
         6 . A rotational forearm exercise apparatus comprising:
 a pair of bar members endwise connected rotationally at a midpoint;   a threaded bolt member longitudinally disposed interiorly within at least one of the pair of bar members, said threaded bolt member having a first end and a second end, said first end disposed through the midpoint and secured interior to the other of the pair of bar members;   a threaded washer fixedly disposed interior to one of the pair of bar members, said threaded washer disposed engaged around the second end of the threaded bolt member; and   a compressive spring member disposed about the threaded bolt member between the midpoint and the threaded washer;   wherein rotation of the pair of bar members relative one another in a first direction effects travel of the washer along the threaded bolt member toward the midpoint and increase compression of the spring member, and rotation of the pair of bar members relative one another in a second direction effects travel of the washer along the threaded bolt member toward the second end of the bolt member to decompress the spring member, whereby force required to manually rotate each of the pair of bar members relative one another is increasable.   
     
     
         7 . The rotational arm exercise apparatus of  claim 6  further comprising a tension slot disposed upon one of the pair of bar members, said tension slot rendering visible the position of a signal element disposed interior to said one of the pair of bar members overlying the compression spring member, whereby compression of the spring member repositions the signal element to visibly signal through the tension slot an indication of the increased tension required to rotate the pair of bars relative the compression of the spring member.