Liquid dispensing and recirculating module
US6089413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Sep 15, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/0237
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A liquid dispensing module for alternately dispensing and recirculating liquid including a module body having a valve stem mounted for reciprocating movement within a main passage of the body. The valve stem includes first and second valve members for respectively engaging first and second valve seats in the main passage. A recirculation passage communicates with the main passage. When the valve stem is in a dispensing position, liquid is prevented from flowing into the recirculation passage and instead flows out of one end of the module. However, when the valve stem is in a recirculation position, liquid is prevented from flowing out of the module and instead enters the recirculation passage where it may flow back to a main pump or supply in a recirculation loop. Apparatus and methods incorporating the liquid dispensing module are further described and encompass similar concepts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.