Impeller housing with reduced noise and improved airflow
US6171054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Sep 28, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D25/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An impeller housing for a suction device with reduced noise and improved airflow. The impeller assembly comprises a shaft and a housing. The housing comprises a volute, a central axis, and an inlet port located along the central axis. An outlet port is located on a second axis spaced from the central axis. An exhaust passage extends from the outlet port. An impeller is mounted on the shaft for rotation. The impeller comprises a hub, and at least one blade extending from the hub. The blade has a distal surface spaced from the shaft. The impeller housing has a first plane which is approximately perpendicular to the central axis. The first plane contacts the blade distal surface. A second plane is parallel to and spaced apart from the first plane. The second plane contacts a wall of the outlet port at a location closest to the first plane. The exhaust passage can increase in diameter along its length. The outlet port can be of a circular cross-section. A spacing wall is positioned between the volute and the wall of the outlet port and spaces each blade from the outlet port, thus reducing noise and increasing airflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.