| Original document(10 pages) Authorized document(11 pages) 中文版 |
A power tool providing a smooth cooling air flow discharging through discharge windows formed in a housing. In the housing a radial fan is rotatably provided for cooling a heated motor. A cooling air generated by the radial fan is discharged through the discharge windows. Each discharge window has a rectangular shape having an upstream side and a downstream side in the rotating direction of the cooling fan. A chamfered portion is provided at least at the upstream side and in an inner peripheral surface of the housing, so that a thickness of the housing wall is gradually small in the rotating direction. The chamfered portion increases an effective area of the window for discharging air. |
Application Number
申请号 |
02139996 |
Application Date
申请日 |
2002.12.14 |
| Title 名称 |
Electric tool with exhausting window |
Publication Number
公开号 |
1426875 |
Publication Date
公开日 |
2003.07.02 |
| Approval Pub. Date |
2006.11.08 |
Granted Pub. Date |
2006.11.08 |
| International Classification 分类号 |
B25F5/02;B25B21/00 |
Applicant(s) Name
申请人 |
Hitachi Koko Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Saika Tomomasa;Otsu Shinyoshi |
| Attorney & Agent 代理人 |
zhang shegao |
| More information 更 多 信 息 |
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