Air suction device for toilet drain passage
US8595868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jan 4, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F1/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An air suction device for a toilet drain passage includes a suction tank partitioned by a diaphragm into an upper chamber and a lower chamber communicating with the passage, and an electromagnetic drive device moving the diaphragm upward. The drive device has a cylindrical case body installed away from the tank, a moving member housed in the case body so as to be vertically movable, and a moving device located on a lower end of the case body. The moving device has a casing and an actuator assembled in the casing to move the moving member. The case body has a first airtight chamber surrounded by the moving member and the moving device. The first airtight chamber has a cubic capacity changed by movement of the moving member and communicates with the first chamber. The first airtight chamber sucks air in the first chamber to move the diaphragm upward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.