Sound-proofing casing for a pneumatic percussive drill
US4624339A · kind A · utility
16Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1984 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Nov 2, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S173/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The internal absorbent layer (9) of the casing delimits an internal volume (10) around the drill (1), which volume is divided on either side of the exhaust orifice (3) by two transverse partitions (13A, 13B) into three successive expansion chambers (11A, 11B, 11C) between the exhaust orifice (3) and the outlet opening (12) to the air outside the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.