WO200071957-A1  ALLEN ET AL: "recent developments in EHD enhanced heat transfer" RENEWABLE ENERGY., vol. 5, no. 1-4, August 1994 (1994-08), pages 436-445, XP000004579 PERGAMON PRESS, OXFORD., GB ISSN: 0960-1481;  PATENT ABSTRACTS OF JAPAN vol. 008, no. 263 (M-342), 4 December 1984 (1984-12-04) & JP 59 134495 A (KOGYO GIJUTSUIN;OTHERS: 0J), 2 August 1984 (1984-08-02);  PATENT ABSTRACTS OF JAPAN vol. 008, no. 263 (M - 342) 4 December 1984 (1984-12-04),relevantClaims[1,2,4,14,15,17,26-29],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  ALLEN ET AL: "recent developments in EHD enhanced heat transfer", RENEWABLE ENERGY., vol. 5, no. 1-4, August 1994 (1994-08-01), PERGAMON PRESS, OXFORD., GB, pages 436 - 445, XP000004579, ISSN: 0960-1481,relevantClaims[1,14,26],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;&lt;figure&gt;1-3&lt;/figure&gt;]US6409975-B1  M. Wawzyniak, J. Seyed-Yagoobi, G. L. Morrison; "An Experimental Study of Electrohydrodynamic Induction Pumping of a Stratified Liquid/Vapor Medium;" Proceedings of the 5th ASME/JSME Thermal Engineering Joint Conference; pp. 1-9, Mar. 15-19, 1999.;  M. Wawzyniak, J. Seyed-Yagoobi; "An Analytical Study of Electrohydrodynamic Induction Pumping of a Stratified Liquid/Vapor Medium;" IEEE Transaction On Industry Applications; vol. 35, No. 1, pp 1-10, Jan./Feb. 1999.;  M. Wawzyniak, J. Seyed-Yagoobi; "An Analytical Study of Electrohydrodynamic Induction Pumping of a Stratified Liquid/Vapor Medium;" Proceedings of Institute of Electrical and Electronics Engineers-Industry Applications Society (IEEE-IAS) Annual Meeting; pp 1879-1886, Oct. 5-9, 1997.;  M. Wawzyniak, J. Seyed-Yagoobi; "Electrohydrodynamic Induction Pumping of a Stratified Liquid/Vapor Medium in the Presence of Volumetric and Interface Electric Charges;" Proceedings of IEEE-IAS; pp 1-10, Oct. 1999.;  Okada and Kanade, A Three-Wheeled Self-Adjusting Vehicle in a Pipe, FERRET-1, The International Journal of Robotics Research, pp. 60-75, vol. 6, No. 4, Winter, 1987.;  PCT Search Report, Sep. 11, 2000.EP1183492-B1  ALLEN ET AL: "recent developments in EHD enhanced heat transfer" RENEWABLE ENERGY., vol. 5, no. 1-4, August 1994 (1994-08), pages 436-445, XP000004579 PERGAMON PRESS, OXFORD., GB ISSN: 0960-1481;  PATENT ABSTRACTS OF JAPAN vol. 008, no. 263 (M-342), 4 December 1984 (1984-12-04) & JP 59 134495 A (KOGYO GIJUTSUIN;OTHERS: 0J), 2 August 1984 (1984-08-02)