公开(公告)号：US20060121413A1

公开(公告)日：2006-06-08

申请号：US10539741

申请日：2003-12-22

申请人： Derek Turner

发明人： Derek Turner

IPC分类号： A61C1/00

CPC分类号： A61C1/05 ,  A61B17/1628 ,  A61B17/1646 ,  A61B2017/00553 ,  A61C1/052 ,  A61C1/057 ,  A61C1/12 ,  A61C1/142 ,  A61C1/18 ,  A61C1/181 ,  A61C1/188 ,  A61C3/02 ,  B23B31/005 ,  B23B2231/022

摘要： A dental handpiece is disclosed including a turbine construction creating a radial in flow of air onto the impeller blades about the whole circumference of the turbine. This generates additional torque and avoids asymmetrical thrust on the impeller wheel. A pair of axially spaced air bearings support the turbine. Air supply to the bearings is controlled in such a way that the air bearings are floated before drive air is supplied to the turbine and after drive air to the turbine has been shut off. This ensures that the air bearings are always operational irrespective of the operational state of the turbine. The handpiece has an improved ergonomic shape, especially the shape and configuration of the front or drive head, which provides additional tooth clearance and a better field of view. An angled swivel connection to the umbilical cord is provided which reduces physical strain on the dentist's wrist. A self adjusting lock and key type torque connection between the dental burr and the chuck is provided which accommodates both conventional burrs and the burr of the lock and key arrangement. An auto stop arrangement for the turbine is disclosed which prevents a vacuum buildup during run-down of the turbine. The specific construction of the auto stop valve in accordance with the invention closes both the drive and exhaust air conduits.

摘要翻译： 公开了一种牙科手机，其包括涡轮机结构，其围绕涡轮机的整个周边产生在叶轮叶片上的径向流动。 这产生额外的扭矩并避免了叶轮上的不对称推力。 一对轴向隔开的空气轴承支撑涡轮机。 以这样的方式控制对轴承的空气供应，即空气轴承在驱动空气供应到涡轮机之前以及驱动到涡轮机的空气已被切断之后浮起。 这确保空气轴承总是可操作的，而与涡轮机的操作状态无关。 手机具有改进的符合人体工程学的形状，特别是前部或驱动头的形状和结构，其提供额外的齿隙和更好的视野。 提供与脐带的倾斜的旋转连接，其减少了牙医手腕上的物理应变。 提供牙钻和卡盘之间的自调节锁和钥匙型扭矩连接，其容纳常规毛刺和锁和钥匙布置的毛刺。 公开了一种用于涡轮机的自动停止装置，其防止在涡轮机失效期间的真空积聚。 根据本发明的自动截止阀的具​​体结构关闭了驱动和排气导管。