Muffler
US5877461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Aug 11, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2590/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Muffler (1) for portable working tools, preferably chain saws (2), whereby the muffler is mounted directly onto the cylinder's (16) exhaust gas outlet (3). The muffler's (1) exhaust gas outlet (4) is positioned on an upper side (5) of the muffler, i.e. a side which is turned in the same direction as the cylinder's (16) upper side, and the muffler's exhaust gas outlet (4) is equipped with a deflecting device (6), for instance a bent tube, which deflects the exhaust gas flow (7), so that this leaves the muffler in a plane which is parallel to the muffler's upper side (5). The figure shows the chain saw schematically, without protective covers, guide bar and chain. Its cooling fan (19) blows cooling air (20) over the cylinder and the muffler. The positioning and the design of the exhaust gas outlet facilitate a very favorable dilution of the exhaust gases with the cooling air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.