Patent ID: 11857820
Assignee: nan
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 0:
1. An isometric exercise tool comprising:
an elongate left handle form having a central opening placed longitudinally there through and a bore space provided concentric with the central opening, the bore space opening out at one end of the left handle form and terminating before an interfacing end of the left handle form, the left handle form including a piston form serving as the interfacing end of the handle form;
an elongate right handle form having a central opening placed longitudinally there through and a bore space provided concentric with the central opening, the bore space opening out at one end of the handle form and terminating before an interfacing end of the right handle form, the right handle form including a ring housing serving as the interfacing end of the right handle form, the ring housing having an inside diameter larger than the outside diameter of the piston form to receive the piston form concentrically therein;
an axle shaft disposed longitudinally through the central openings through the left and right handle forms, the axle shaft including an external thread pattern disposed at one end and a pressure plate having a central opening placed there through disposed at the other end, the pressure plate disposed over the axle shaft orthogonal to the axle shaft and welded or otherwise fixed thereto;
at least one compressible spring or set of compressible springs having an outer diameter smaller than the inner diameter of the bore space of the right handle form, the spring or spring set fitted over the axle shaft at the threaded end;
an adjustment turn handle including a handle knob and a smaller diameter handle stem with a central opening placed there through the center opening including a female thread pattern matching the external thread pattern on the axle shaft; and
a friction-resistive material disposed to and fixed around the bottom of the bore space in the left handle form and disposed to and fixed around the bottom of the ring housing of the right handle form;
whereby an operator may set the level of resistive force of the exercise tool by advancing the adjustment handle a distance over the thread pattern on the axle shaft to compress the spring, the compression force translating through the axle shaft to the piston form and pressure plate in tandem causing directly proportional compression force of the piston form and pressure plate against the disposed friction-resistive materials.