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    • 32. 发明授权
    • Self-tightening chuck for dental tools
    • 用于牙科工具的自紧卡盘
    • US5254004A
    • 1993-10-19
    • US7244
    • 1993-01-21
    • Michael FeldmanMoshe Meller
    • Michael FeldmanMoshe Meller
    • A61C1/14
    • A61C1/141
    • A rotary dental drive tool has a rotatable driving member which is connected to a working tool via a self-tightening chuck, the rotatable driving member rotating in a clockwise direction during use. The chuck includes a chuck member having a tool-engaging internal surface portion for receiving a working tool therein, the chuck member having a tapered outer surface portion which is engageable with a tapered inner surface portion of the rotatable driving member so as to press the tool-engaging internal surface portion of the chuck member against the working tool to fixedly engage the working tool with said rotatable driving member via the chuck member. The chuck member has a left-hand threaded screw member on an outer surface portion thereof, which is engageable with a left-hand threaded screw portion on an inner surface portion of the rotatable driving member. The chuck member is rotatable in a left-hand threaded manner into the screw threaded portion of the rotatable driving member so as to cause the tapered surfaces to mutually engage and press the tool-engaging surface portion of the chuck member against the working tool responsive to rotation of the rotatable driving member, whereby the chuck member automatically self-tightens against the working tool during operation of the dental drive tool, and the working tool rotates with the rotatable driving member.
    • 旋转式牙齿驱动工具具有可旋转的驱动构件,该驱动构件通过自紧卡盘连接到作业工具,旋转驱动构件在使用期间沿顺时针方向旋转。 卡盘包括具有用于在其中接收加工工具的工具接合内表面部分的卡盘构件,卡盘构件具有锥形外表面部分,该锥形外表面部分可与可旋转驱动构件的锥形内表面部分接合,以便按压工具 - 将所述卡盘构件的内表面部分压靠所述加工工具,以通过所述卡盘构件将所述加工工具与所述可旋转驱动构件固定接合。 卡盘构件在其外表面部分上具有左旋螺纹构件,其可与可旋转驱动构件的内表面部分上的左旋螺纹部分接合。 卡盘构件可以左旋螺纹方式旋转到可旋转驱动构件的螺纹部分中,以使得锥形表面相互接合,并且将卡盘构件的工具接合表面部分压靠在工作工具上,以响应于 旋转驱动构件的旋转,由此卡盘构件在牙齿驱动工具的操作期间自动自动地紧固加工工具,并且加工工具与可旋转的驱动构件一起旋转。