Suction activated reciprocating system
US5603740A · kind A · utility
Inventor
Key dates
| Filing date | Mar 27, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Mar 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2279/55
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A suction source is connected to the upper end of a vertical suction tube; a plug member slides upwardly within the tube under the action of the suction source and moves down by gravity when the suction source is cut off The suction tube has a bypass port above the plug member and a valve is operated by the movement of the plug member to close and open the bypass port when the plug reaches its lower and upper limit positions respectively. Therefore, the plug continuously reciprocates up by suction and down by gravity upon sequential closing and opening of the valve. The system is incorporated in a central vacuum cleaning apparatus which provides the suction source and has a filter. The reciprocating movement of the plug drives a hammer or brush to continuously remove the dirt accumulating on the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.