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    • 7. 发明授权
    • Dental prophylaxis angle
    • 牙齿预防角度
    • US5020994A
    • 1991-06-04
    • US477238
    • 1990-02-09
    • Jerry T. Huang
    • Jerry T. Huang
    • A61C17/00
    • A61C17/005
    • A dental prophylaxis angle formed of molded plastic parts is provided, which includes two accurately supported rotors extending at right angles to each other in an easily manufactured construction. The prophylaxis angle includes an elbow-shaped forward housing member (54, FIG. 2) which surrounds the output rotor (18) and the forward portion of the input rotor (14), and a rearward housing member (60) which snaps into arrangement with the rear of the forward housing member. The rearward housing member has a rotor-engaging shoulder (72) that can abut the shoulder (44) at the rear end of the input rotor forward portion.
    • 提供由模制塑料部件形成的牙齿预防角度,其包括两个精确支撑的转子,其以容易制造的结构彼此成直角地延伸。 预防角度包括围绕输出转子(18)和输入转子(14)的前部的肘形的前壳体构件(54),以及向后的壳体构件(60) 与前壳体的后部。 后部壳体构件具有可抵靠在输入转子前部的后端处的肩部(44)的转子接合肩部(72)。