Street sweeper pick-up head
US5839157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | May 6, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01H1/0836
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A street sweeper is provided including a vacuum pick-up head having a relatively low noise level and high sweeping efficiency resulting from the careful control of the velocity and direction of the air flow. In order to control the air flow, the internal contour of the pick-up head is optimized to accommodate the streamline flow pattern to minimize turbulence and boundary layer separation. The cross sectional area of the internal contour of the pick-up head is designed to be substantially constant or slightly converging. A support assembly for supporting a nozzle assembly is provided which minimizes damage to the pick-up head and minimizes infiltration into the pick-up head. A suction tube is also provided which minimizes the noise level and increases the efficiency of the pick-up head and the fan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.