Rotary eraser assembly
US7904989B1 · kind B1 · utility
3Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | May 16, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D13/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary eraser assembly includes a rotary eraser, two discs, a threaded bolt and a nut. The rotary eraser includes, in each of two opposite sides, a cavity in communication with the aperture and at least one recess in the wall of the cavity. Each of the discs includes an annular lip disposed in the cavity in a related one of the sides of the rotary eraser and at least one block disposed in the recess in the related side of the rotary eraser. The threaded bolt is inserted through the rotary eraser and the discs. The nut is engaged with threaded bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.