| 摘要 |
A unitary retainer cup adapted for being attached around a continuous vertical pipe so as to retain particulate materials in the cup. The cup has a lower cylindrical sleeve portion and a conical-shaped upper retainer portion including suitable clamp means which permits mating edges of a longitudinal joint in the cup to be retained together. The cup can be constructed of thin sheet material which is sufficiently flexible to permit it being placed around a pipe and clamped firmly onto the pipe. The lower sleeve portion is lined with a resilient material to accommodate irregularities in the surface of the pipe. The cup conical portion has a drain opening provided near its lower end to permit periodic removal of accumulated material from the cup.
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