Power tool
US9533406B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2012 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Oct 12, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2250/185
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A power tool comprises a driving mechanism and a gear housing space (105a) which houses the driving mechanism. A lubricant is provided to the driving mechanism inside a gear housing (105). The driving mechanism includes a driving motor (110) having a motor shaft (111). The motor shaft (111) includes an inner communicating opening (191), an outer communicating opening (192) and an air passage (193) which connects the inner communicating opening (191) and the outer communicating opening (192). At least a part of the air passage (193) is arranged inside the motor shaft (111), and the passage (193) communicates with the gear housing space (105a) via the inner communicating opening (191) and also communicates with the outer space of the gear housing (105) via the outer communicating opening (192).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.