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This paper describes a novel type of fluid power motor, IP Motor, which can be driven by domestic tap water pressure. Because the driving fluid does not directly contact mechanical moving parts of this motor, it makes it possible to solve problems such as leakage, lubrication, rust and contamination that have plagued previous contact-type motors, without requiring a seal. In order to design the motor with such advantages, this paper examines (i) basic design principles for pinch-roller-driven mechanism, (ii) structural consideration to realize infinite rotation, (iii) the characteristic analysis, and (iv) the mechanism to improve the performance. Finally, the validity of the introduced design methods is demonstrated through the motion experiments which were conducted with a developed prototype.

Development and Motion Analysis of the Inscribed Pinch-roller Type Fluid Power Motor Driven by Tap Water Pressure