Importance

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Abstract

A rotary fluid machine includes two intermeshing rotors rotatably mounted in a double-cylinder bore portion of a casing, each rotor having two lobe portions disposed on two opposite ends of a long coordinate axis of the rotor and having a waist portion confined by two shallow recess portions formed on two opposite sides of a short coordinate axis of the rotor so that one rotor can be smoothly rotatably engageable with the other rotor in a single-point contact for a smooth running of the two rotors. For a buffer of a higher output fluid pressure, a balancing chamber is formed between the bore portion and a fluid outlet so that a fluid suddenly increased with fluid pressure may be backflowed into the bore portion through a plurality of holes formed in a partition plate between the chamber and the bore portion for preventing water or air hammer when handling high-pressure fluid.

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First Claim