Device and method for pumping fluids employing the movement...

Details Device and method for pumping fluids employing the movement... Device and method for pumping fluids employing the movement...

2011-05-17

2011-05-17

Kramer, Devon C (Department: 3746)

Pumps

By heating of pumped fluid

C417S208000, C417S051000

Reexamination Certificate

active

07942643

ABSTRACT:
The present fluid pumping method for micro-fluidic devices uses gas bubbles to move fluid by light beams. The light beams are emitted to the fluid near the gas bubble through an optically transparent cover and correspondingly heat the fluid in the micro channels. The liquid temperature variation changes the surface tension of the gas bubble near the heated fluid side, therefore, a pressure gradient between the end portions of the gas bubble generates accordingly. By moving the light beams, the moved pressure difference will be achieved, which will drive the gas bubbles and pump the fluid. Such a fluid pumping can simplify the structure of a micro-fluidic device and eliminate heat loss because of using a controllable light beam.

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Bezuglyi et al. “Gas Bubbles in a Hele-Shaw Cell Manipulared by a Light Beam.” Technical Physics Letters, vol. 28, No. 10, 2002, pp. 828-829.
Communication issued Apr. 9, 2010 by the Korean Intellectual Property Office for Korean Patent Application No. 1020030091467.

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