Exercise device

Abstract

An exercise device for exercising a user's body. The exercise device includes a roll portion extending between two roll ends thereof and having a surface substantially in the form of a hyperboloid of one sheet adapted for engagement with the body. The roll portion is substantially symmetrical in relation to a longitudinal axis thereof, and includes a bore substantially coaxial with the longitudinal axis. The device includes an elongate member extending between two member ends thereof extending through the bore so that the member ends are substantially equally spaced apart from the roll ends respectively proximal thereto, and the roll portion is rotatable about the elongate member. The device also includes one or more fastening mechanisms rotatably attaching the roll portion to the elongate member.

I claim: 
     
         1 . An exercise device for exercising a user's body, the exercise device comprising:
 a roll portion extending between two roll ends thereof and comprising a surface substantially in the form of a hyperboloid of one sheet adapted for engagement with the body, the roll portion being substantially symmetrical in relation to a longitudinal axis thereof;   the roll portion additionally comprising a bore substantially coaxial with the longitudinal axis;   an elongate member extending between two member ends thereof extending through the bore such that the member ends are substantially equally spaced apart from the roll ends respectively proximal thereto, the elongate member having an outer diameter smaller than the bore to permit rotation of the roll portion about the elongate member; and   at least one fastening mechanism rotatably attaching the roll portion to the elongate member.   
     
     
         2 . An exercise device according to  claim 1  in which the roll portion additionally comprises at least one substantially cylindrical part disposed proximal to at least one of said roll ends, said at least one substantially cylindrical part including an engagement surface positioned radially outwardly relative to the longitudinal axis at least as far as the surface of the roll portion proximal to said roll ends. 
     
     
         3 . An exercise device according to  claim 1  in which said roll ends are at least partially defined by end surfaces respectively extending radially outwardly from the bore relative to the longitudinal axis. 
     
     
         4 . An exercise device according to  claim 3  in which the end surfaces are substantially planar and substantially orthogonal to the longitudinal axis. 
     
     
         5 . An exercise device according to  claim 1  in which the surface of the roll portion comprises a material having a durometer value of between approximately 20 Shore A and approximately 40 Shore A. 
     
     
         6 . An exercise device according to  claim 5  additionally comprising at least two support elements mounted on the elongate member adjacent to said roll ends, each of said at least two support elements extending at least as far from the longitudinal axis as the surface of the roll portion proximal to said roll ends. 
     
     
         7 . An exercise device according to  claim 6  in which said at least two support elements comprise a material having a durometer value of between approximately 41 Shore A and approximately 100 Shore A. 
     
     
         8 . An exercise device according to  claim 1  in which the surface of the roll portion comprises a material having a durometer value of between approximately 35 Shore A and approximately 100 Shore A. 
     
     
         9 . An exercise device according to  claim 1  in which:
 the elongate member comprises at least one notch disposed proximal to at least one of said roll ends when the roll portion is mounted on the elongate member; and 
 said at least one fastening mechanism comprises an engagement body movable between an engaged condition, in which at least a part of said engagement body is positioned in said at least one notch to hold said at least one fastening mechanism in said at least one notch such that said at least one fastening mechanism at least partially rotatably attaches the roll portion to the elongate member, and a disengaged condition, in which said engagement body is positioned out of said at least one notch and said at least one fastening mechanism is removable from the elongate member. 
 
     
     
         10 . An exercise device according to  claim 9  in which said at least one fastening mechanism additionally comprises a biasing means for biasing said engagement body to the engaged condition. 
     
     
         11 . An exercise device according to  claim 1  in which:
 the exercise device comprises two fastening mechanisms; 
 the elongate member comprises a plurality of apertures disposed between each of said roll ends and said member ends disposed proximal to said roll ends respectively when the roll portion is mounted on the member; and 
 each said fastening mechanism comprises an engagement body movable between an engaged condition, in which at least a part thereof is disposed in a selected one of said apertures such that each said fastening mechanism at least partially rotatably attaches the roll portion to the elongate member, and a disengaged condition, in which the engagement body is positioned out of said apertures and said fastening mechanism is removable from the elongate member. 
 
     
     
         12 . An exercise device according to  claim 11  in which said at least one fastening mechanism additionally comprises a biasing means for biasing said engagement body to the engaged condition. 
     
     
         13 . An exercise device according to  claim 11  in which each of said two fastening mechanisms is positioned between a selected one of the roll ends and the member end proximal thereto respectively, and additionally comprising at least two preselected weight elements positioned between the respective roll ends and the respective fastening mechanisms. 
     
     
         14 . An exercise device according to  claim 1  in which the roll portion is approximately 11.25 inches (approximately 28.6 cm.) long and the distance of the surface from the longitudinal axis varies from approximately 2.5 inches (approximately 6.4 cm.) to approximately 4 inches (approximately 10.05 cm.). 
     
     
         15 . An exercise device according to  claim 1  in which the roll portion additionally comprises at least one preselected weight. 
     
     
         16 . An exercise device for exercising a user's body, the exercise device comprising:
 a roll portion extending between two roll ends thereof and comprising a substantially concave surface substantially symmetrical relative to a longitudinal axis thereof, the concave surface being adapted for engagement with the body;   the roll portion additionally comprising a bore substantially coaxial with the longitudinal axis;   an elongate member extending between member ends thereof received in the bore, the elongate member having an outer diameter smaller than the bore to permit rotation of the roll portion about the elongate member; and   at least one fastening mechanism rotatably attaching the roll portion to the elongate member.   
     
     
         17 . An exercise device according to  claim 16  in which the roll portion additionally comprises at least one substantially cylindrical part disposed proximal to at least one of said roll ends, said at least one substantially cylindrical part including an engagement surface positioned radially outwardly relative to the longitudinal axis at least as far as the substantially concave surface proximal to said roll ends. 
     
     
         18 . An exercise device according to  claim 16  in which said roll ends are at least partially defined by end surfaces respectively extending radially outwardly from the longitudinal axis. 
     
     
         19 . An exercise device according to  claim 16  in which the substantially concave surface comprises a material having a durometer value of between approximately 20 Shore A and approximately 100 Shore A. 
     
     
         20 . A kit of parts for an exercise device for exercising a user's body, the kit comprising:
 a roll portion extending between two roll ends thereof and comprising a substantially concave surface substantially symmetrical relative to a longitudinal axis thereof, the concave surface being adapted for engagement with the body;   the roll portion additionally comprising a bore substantially coaxial with the longitudinal axis;   an elongate member extending between member ends thereof receivable in the bore, the elongate member having an outer diameter smaller than the bore to permit rotation of the roll portion about the elongate member; and   at least one fastening mechanism adapted for rotatably attaching the roll portion to the elongate member.