Apparatus for applying pressure to the bones of a human arm. A device comprising: a flexible member having a first end and a second end a linear member fixed to the first end and slidably coupled to the second end and an end of the linear member A cam coupled to the surface and abutting a surface of the second end, and a lever arm coupled to the cam. The lever arm has a first position in which the cam applies a first pressure to the surface of the second end of the flexible member and a second position where the cam applies a second greater pressure to the surface of the second end of the flexible member, A second position in which the second end of the flexible member is moved relative to one end of the linear member to reduce the distance between the first end and the second end of the flexible member and , Which can be moved.(FIG.ヒトの腕の骨に圧力を加えるための装置。装置は、第1端部と第2端部とを有する可撓性部材と、第1端部に固定され且つ第2端部に滑動式に結合される線形部材と、線形部材の1つの端部に結合され且つ第2端部の表面に当接するカムと、カムに結合されたレバーアームと、を含む。レバーアームは、カムが可撓性部材の第2端部の表面に第1圧力を加える第1位置と、カムが可撓性部材の第2端部の表面により大きい第2圧力を加えて、可撓性部材の第2端部を線形部材の1つの端部に対して移動させて、可撓性部材の第1端部と第2端部との間の距離を減少する第2位置と、の間で移動可能である。【選択図】図4