Fluid dispensing system
US6419841B1 · kind B1 · utility
10Cited by
57References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1234
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid dispensing system is provided which has a first diaphragm pump, a filter connected to receive the discharge of said first pump, and an accumulator/second diaphragm pump connected to receive the discharge of said filter. Hydraulic fluids pumped by cylinder/piston/stepper assemblies independently actuate each of the diaphragm pumps, providing accurate, controllable and repeatable dispense of the subject fluid. There is also structure operable to suck back fluid from downstream of the second pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.