| 摘要 |
<p>A FLOOR TRAP COMPRISES A TUBULAR BODY (1) OPEN AT BOTH ENDS, A TUBULAR MEMBER (13) WITHIN THE BODY MEMBER OF SMALLER DIAMETER AND HEIGHT THAN THE BODY (1), AND WHICH IS ALSO OPEN AT BOTH ENDS AND HAS A FLANGE (14) AT ONE END WHICH CLOSES THE EXIT END OF THE BODY MEMBER (1) WHILE RETAINING AN EXIT THROUGH THE TUBULAR MEMBER (13), AND A SHROUD MEMBER (20) LOCATED ABOVE AND SPACED FROM THE END OF THE TUBULAR MEMBER (13) REMOTE FROM THE FLANGE (14) AND HAVING A CURVED PROFILE EXTENDING TO THE INNER SURFACE OF THE BODY MEMBER (1) TO PREVENT WATER ENTERING THE BODY MEMBER (1) FROM ENTERING THE TUBULAR MEMBER (13) OTHER THAN THROUGH THE SPACE (22) BETWEEN THE BOTTOM SURFACE OF THE SHROUD MEMBER (20) AND THE UPPER END (18) OF THE TUBULAR MEMBER (13). THE MOST ILLUSTRATIVE DRAWING ACCOMPANYING THE ABSTRACT: FIG 1</p> |
