Fluid dispensing apparatuses and methods thereof
US8220672B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | May 4, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D1/108
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for dispensing with a valve-less block including internal air passages coupled with an air source and internal dispensing passages coupled with a flow channel. The flow channel is disposed external to the block and couples with a fluid source. The dispensing passages are further configured in fluid communication with the air passages and place the flow channels in fluid communication with the air passages. A port is defined in the block to dispense fluid from the block. At least one sensor is coupled with each flow channel and indicates the presence of at least one of air and fluid in the flow channel. The detection of air or fluid ensures a location of a flow front of a fluid residing in the flow channel, and ensures the presence of an air gap that serves as a check valve to prevent mixing of fluids and to prevent backflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.