Grinding vacuum shroud
US5791979A · kind A · utility
Inventors
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B23/028
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved vacuum shroud is provided for a grinding tool. The vacuum shroud employs a resilient bonnet with a central, axial opening therein for receiving a rotary grinder shaft therethrough. The bonnet is formed of a resilient, flexible, plastic material having a roof with a skirt at the periphery of the roof that laterally surrounds the grinder disk. A reinforcement plate at the undersurface of the roof protects the roof of the vacuum shroud when the grinder body is tilted at an incline toward a work surface so as to exert a greater pressure on one portion of the grinding face of the grinding disk than another. The peripheral region of the roof of the bonnet is flexible enough to permit orientation of the grinder tool body at various angles of inclination relative to the work surface while still maintaining contact between the work surface and the lower edge of the bonnet skirt throughout its entire length. The improved vacuum shroud thereby maintains substantially complete contact between the skirt of the vacuum shroud bonnet and the work surface regardless of the angle of orientation of the grinder tool body relative to the work surface. This aids in confining airborne particl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.