Pneumatic power tool with exhaust air outlet deflector
US6923272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2002 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Nov 25, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S173/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic power tool comprises a housing (10, 11) with a motor and a pressure air inlet passage (12) and an exhaust air outlet passage (16) both extending through the housing (10, 11) and communicating with the motor, wherein the outlet passage (16) is provided with sound attenuating elements (36, 37) formed in a highly porous resinous material and arranged to be penetrated by the exhaust flow for exhaust noise reduction, and an exhaust flow diverting deflector (17) mounted at the outlet end of the outlet passage (16) and comprising a shell like body (18) with a cylindrical neck portion (19) rotatively received in the outlet passage (16), a concave flow guiding surface (28), and two parallel inner walls (30a, b) forming between them a main flow passage (31) and between them and the shell body (18) two narrow secondary flow passages (32a, b) for accomplishing noise dampening low velocity air flow shields on both sides of the main flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.