| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainpipe bend that prevents any increase in positive pressures within drainpipes caused by blockage at the bend, is not restricted in its application direction or application positions, and is simple in structure. SOLUTION: In a drainpipe bend of which the pipe body 2 is curved relative to the pipe axis, and in which a pipe end 3 is formed at both ends of the pipe body 2, an air vent space 4 larger in internal diameter than other parts is formed at the bending part of pipe body 2 in the direction of the pipe axis. COPYRIGHT: (C)2005,JPO&NCIPI
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