发明授权
- 专利标题: Water injection type dental handpiece
- 专利标题(中): 注水式牙科手机
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申请号: US657811申请日: 1996-05-31
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公开(公告)号: US5816803A公开(公告)日: 1998-10-06
- 发明人: Takasuke Nakanishi
- 申请人: Takasuke Nakanishi
- 申请人地址: JPX Tochigi
- 专利权人: Nakanishi, Inc.
- 当前专利权人: Nakanishi, Inc.
- 当前专利权人地址: JPX Tochigi
- 优先权: JPX7-133142 19950531
- 主分类号: A61C1/08
- IPC分类号: A61C1/08 ; A61C1/05 ; A61C8/00 ; A61C1/02
摘要:
A center injection type dental handpiece contains a cutting bar having a hollow axially penetrating the bar, holding means for detachably holding the bar, rotating means for rotating the bar, a water injection nozzle communicating with a cooling water feed source. The water injection nozzle is inserted into the hollow of the bar for injecting a cooling water from tip of the bar. The handpiece further contains a packing for sealing a gap between the outer periphery of the nozzle and the inner periphery of the bar at the proximal end of the bar.