| 摘要 |
A sealing grommet is for use in coupling in sealed relation a drain pipe depending from a roof and a co-operating leader pipe. The bottom end of the drain pipe is inserted into the top end of the co-operating leader pipe. The outside diameter of the drain pipe is smaller than the inside diameter of the co-operating leader pipe by an unspecified distance. The sealing grommet comprises an annular base portion having top, bottom, radially inner side and radially outer side surfaces. An annular interior wall portion extends upwardly from the base portion to terminate at a top edge, and is defined by opposed inner and outer wall surfaces. The interior wall portion has an overall inside diameter defined by the inner wall surface. A substantially resilient annular exterior wall portion extends upwardly and outwardly from the base portion in spaced apart relation to the annular interior wall portion, to terminate at a top edge, and is defined by opposed inner and outer wall surfaces. The exterior wall portion has an overall outside diameter defined by the outer wall surface. The bottom end of the drain pipe is retained within the substantially resilient annular interior wall portion in sealed engagement with the inner wall surface. The top end of the co-operating leader pipe surrounds the substantially resilient annular exterior wall portion in sealed engagement with the outer wall surface, thereby coupling in sealed relation the drain pipe and the co-operating leader pipe.
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