Patent ID: 6495071
Filing Date: 2002-12-17
Classification: C10M,F03G,F15B,H02N

Abstract:
A method of moving an electro-sensitive movable fluid comprising:providing an electro-sensitive movable fluid composition comprising a hydrocarbon compound having 5 to 10 carbon atoms, and at least one compound having a conductivity &sgr; plotted as abscissa, and a viscosity &eegr;, plotted as ordinate, located inside a triangle of a graph showing a relation between conductivity &sgr; and viscosity &eegr; of a fluid at a working temperature, said triangle having, as vertices, a point P indicated by the conductivity &sgr;=4Ã—10âˆ’10 S/m and the viscosity &eegr;=1Ã—100 PaÂ·s, a point Q indicated by the conductivity &sgr;=4Ã—10âˆ’10 S/m and the viscosity &eegr;=1Ã—10âˆ’4 PaÂ·s, and a point R indicated by the conductivity &sgr;=5Ã—10âˆ’6 S/m and the viscosity &eegr;=1Ã—10âˆ’4 PaÂ·s, said composition being adjusted to have a conductivity &sgr; and a viscosity &eegr; located inside said triangle, wherein said compound is selected from the group consisting of compounds having the general formula: where X3 is a monovalent group having 1-25 carbon atoms, 0-3 oxygen atoms of an epoxy group and (2a+1âˆ’2b) hydrogen atoms where (a) is an integer of 1 to 25, b is 0 to 3, such that 2a+1>2b; and where Y3 is a linear hydrocarbon group of 1 to 14 carbon atoms or a hydrocarbon group of 1 to 14 carbon atoms having a branched chain and a carbon-to-carbon double bond, provided that when X3 contains oxygen atoms, Y3 is a linear hydrocarbon group, and when X3 contains no oxygen atoms, Y3 has a branched chain and carbon-to-carbon double bond, and applying a voltage between at least two electrodes arranged in the area of said electro-sensitive movable fluid to subject the electro-sensitive movable fluid to an electric field so as to move the electro-sensitive movable fluid.