The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2001
Filed:
Feb. 14, 2000
Applicant:
Inventors:
Ocie T. Snodgrass, Garland, TX (US);
Michael K. Farney, Irving, TX (US);
Gregory M. Gibson, Dallas, TX (US);
Assignee:
Millipore Investment Holdings, Ltd., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 1/712 ; B67D 5/40 ;
U.S. Cl.
CPC ...
B01D 1/712 ; B67D 5/40 ;
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. The system further includes a suck-back device downstream of the second pump.