FLUID COUPLING HAVING STAIR TYPE SYNCHRONOUS SCREWS

摘要

PURPOSE: A fuel coupling is provided to reduce a rotation number needed for fixing two pipe members together without a danger of water leakage. CONSTITUTION: A first and a second pipe members(12,14) are combined to each other to place a first end of a second pipe(14) in the aperture of a first pipe(12) and a female nut(20) glides on a male nut(18) to combine all nut parts simultaneously. The female nut rotates and all nut parts are combined simultaneously and the male nut is inserted to the female nut by the rotation until the end of the male nut approaches to a shoulder part(34). A rotational swivel nut needs less rotation number to obtain the same combining power as one of a general nut. And the pipes don't have to rotate so that the pipes are easily installed at a narrow space.