| 主权项 |
1. A wrist strengthening device, comprising:
a first handle; a second handle coupled to the first handle; and a tightening component coupled to the first handle and the second handle, the tightening component comprising:
a clamp insert having a conical component adapted to apply pressure to an inner insert, anda collar, surrounding the clamp insert, adapted to tighten and loosen the conical component against the inner insert such that tightening the collar effects inward radial pressure from the conical component to the inner insert and loosening the collar relieves the inward radial pressure; wherein the tightening component is adapted to provide resistance to axial movement of the first handle and the second handle as the first handle is moved in a first direction and as the second handle is moved in a second direction, opposite from the first direction the tightening component further comprising a lock bearing located between the collar and the conical component, a handle bearing located between the conical component and the inner insert, and a retainer bearing adapted to hold the clamp insert, handle bearing, inner insert, and collar in place when the wrist strengthening device is assembled. |
