Portable grinder with double seal bearing
US6454640B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Mar 14, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/7896
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention is based on a power tool (10), in particular a power sander (101, 102, 103) with a housing (12, 112, 212) and a motor (20, 120, 220), supported in the housing, that has a rotatable drive shaft (22, 122, 222) which is connected operatively by one end to a tool (50, 150), and in particular carries a sanding plate that can be equipped with grinding means (52), relative to which sanding plate the drive shaft (22, 122, 222) is rotatably supported by means of a bearing (25, 125, 425), in particular by means of a roller bearing with an inner race (28) and outer race (30) spaced apart by a bearing gap (26) and with rotationally fixed and rotatably disposed parts, and in particular is provided with means for removing grinding dust.It is proposed that a bearing (425) closely adjacent to any incident grinding dust and/or chips created has, on at least one side of its bearing gap (26), a plurality of sealing disks (38, 40), in particular two of them, disposed side by side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.