Asphalt strainer for an asphalt distributor
US6119961A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/174
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In an asphalt distributor having a tank for holding asphalt and a pump for pumping asphalt from the tank to a spraybar, a self draining asphalt strainer is provided. The asphalt strainer includes a body having an inlet and outlet with a filtering chamber disposed between the inlet and the outlet. A filter or straining element is disposed in the filtering chamber for filtering asphalt flowing between the inlet and the outlet. A conduit extends the inlet into the filtering chamber. A pair of valves are disposed on each end of the conduit forming a suckback chamber therebetween. A suckback tube is connected to the conduit intermediate the valves and extends into the filtering chamber. The pump is bidirectional and has a reverse mode which forces asphalt back through the outlet and inlet into the tank. The strainer has a first flow passage from the outlet to the inlet through both of the valves when open. The suckback tube provides a second flow passage from the outlet to the inlet when one of the valves is closed for draining asphalt remaining in the strainer box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.