Portable air-blowing working machine
US6109865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D25/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A portable air-blowing working machine includes a prime mover and an air-blowing system. The air-blowing system incorporates first-stage and second-stage centrifugal air-blowing sections, which are rotatably driven by an output shaft of the prime mover and are interconnected by an air-blowing passage for delivering air discharged from the first-stage air-blowing section to the intake of the second-stage. In operation, external air is drawn into the first-stage air-blowing section, increased therein in velocity and pressure, and then continuously discharged via the air-blowing passage to the second-stage air-blowing section, where the air is further accelerated and compressed before being finally discharged to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.