Balanced asymmetric electronic pulse patterns for operating elec

Details Balanced asymmetric electronic pulse patterns for operating elec Balanced asymmetric electronic pulse patterns for operating elec

1997-03-21

1999-10-12

Warden, Robert

Chemistry: electrical and wave energy

Processes and products

Electrophoresis or electro-osmosis processes and electrolyte...

204454, 204601, 204450, G01N 2726

Patent

active

059649976

ABSTRACT:
Provided is a method of operating an electrode-based pump to pump a liquid, the method comprising periodically reversing the voltage polarity applied to the electrodes of the pump while maintaining a net flow of liquid in a desired direction. Further provided is an apparatus for pumping liquid with an electrode-based pump comprising: a channel of capillary dimensions; a pump comprising at least two electrodes inserted into the channel; a controller for controlling the voltages applied to the electrodes such that the pumps operate under a sequentially repeated pattern of polarity cycles, and such that over the period of the repeated pattern either (a) a first ratio of a voltage-integrated area A.sub.1 associated with a first polarity to a voltage-integrated area A.sub.2 associated with the other polarity or (b) a second ratio of a charge q.sub.1 carried by the current associated with a first polarity to a charge q.sub.1 carried by the current associated with the other polarity is between about 1:1/2 and about 1/2:1. Additionally provided are apparatuses and methods for electrophoresis.

REFERENCES:
patent: 3923426 (1975-12-01), Theeuwes
patent: 4101220 (1978-07-01), Bean et al.
patent: 4316233 (1982-02-01), Chato et al.
patent: 5015351 (1991-05-01), Miller
patent: 5178737 (1993-01-01), Lai
patent: 5194133 (1993-03-01), Clark et al.
patent: 5292416 (1994-03-01), Novotny et al.
patent: 5585069 (1996-12-01), Zannzucchi et al.
Fuhr et al., "Microfabricated electrohydrodynamic (EHD) pumps for liquids of higher conductivity," INSPEC Abstract Number: C9305-3260J-002, Sep. 1992.
Fuhr et al., "Pumping of water solutions in microfabricated electrohydrodynamic systems," INSPEC Abstract Number: C9301-3260J-006, Feb. 1992.
Richter et al., "The electrohydrodynamic micro flow meter," INSPEC Abstract Number: A9213-4780-013, B9207-7230-074, Jun. 1991.
Bart et al., Sensors and Actuators, A21-A23: 193-197, 1990 Month unavailable.
Dasgupta et al., Anal. Chem., 66: 1792-1798, 1994 Month unavailable.
Howe et al., IEEE Spectrum, pp. 29-35, Jul. 1990 Month unavailable.
Mehregany, Circuits and Devices, pp. 14-22, 1993 Month unavailable.
Melcher, The Physics of Fluids, 9(8): 1548-1555, 1966 Month unavailable.
Pickard, Journal of Applied Physics, 34(2): 246-250, 1963 Month unavailable.
Richter et al., Sensors and Actuators, A 29: 159-168, 1991 Month unavailable.
Stuetzer, Journal of Applied Physics, 31(1): 136-146, 1960 Month unavailable.
Wenzel et al., Trans. of Electron Devices, 35(6): 735-743, 1988 Month unavailable.

Affiliated with

Also associated with

Rating

Balanced asymmetric electronic pulse patterns for operating elec does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Balanced asymmetric electronic pulse patterns for operating elec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balanced asymmetric electronic pulse patterns for operating elec will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-648718