Sweeper apparatus
US6154920A · kind A · utility
Inventors
Key dates
| Filing date | Feb 24, 1999 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Feb 24, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01H1/0845
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A sweeper apparatus is disclosed for effectively and efficiently sweeping debris from a floor surface with a minimal amount of dust being generated outside of the apparatus. The sweeper apparatus includes a sweeper head assembly having a containment housing, a sweeper brush, an auger brush, and a vacuum intake head. The sweeper brush and the auger brush are rotatably mounted within the containment housing. The sweeper brush gravitationally rests upon the ground surface and provides for urging debris into the housing and towards the auger brush. The apparatus includes a vacuum source including a positive displacement vacuum capable of drawing vacuum through the sweeper head and drawing debris into a collection chamber. The apparatus of the present invention further includes an adjustable relief valve associated with the vacuum assembly. The relief valve has a sealing member and a pneumatic chamber adapted to bias the sealing member against a wall of the assembly to thereby seal an opening. The relief valve being adjustable by regulating the pneumatic pressure in the chamber, thereby adjusting the bias pressure of the sealing member against the wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.