Structure for use in a power driven tool for collecting dust generated by the operation of the tool
US6159085A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B23/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a structure for use in a power driven tool (1) for collecting dust generated by the operation of the tool. The structure includes: an outer housing; a commutation motor (5) disposed within the housing and including a main shaft (6) which has a tip end and a commutator (7) on the main shaft; a pair of brush assemblies (29) radially disposed around, and in contact with, the commutator of the motor; and a dust collecting fan (9) mounted on the main shaft of the commutation motor. The fan is disposed between the commutator and the outer housing. Also included are a dust intake passage (28) formed within the housing and having an intake (27) formed adjacent the location where dust is generated by the operation of the tool; a dust discharge passage (46) formed within the housing and having an outlet; and a dust chamber (43) formed substantially between the outer housing and the commutator for containing the dust collecting fan. The dust chamber has a first connecting portion (35) coupled to the dust intake passage and a second connecting portion (40) coupled to the dust discharge passage. The first and second connecting portions are arranged around the main shaft where …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.