Outside drop for manhole

Details Outside drop for manhole Outside drop for manhole

2006-02-28

2006-02-28

Chambers, A. Michael (Department: 3753)

Fluid handling

With casing, support, protector or static constructional...

Jacketed

C137S343000, C137S363000, C137S372000, C248S074400, C052S021000

Reexamination Certificate

active

07004190

ABSTRACT:
A protective collar for protecting the outside drop of a manhole having a U shaped housing extending from the outside wall of the manhole around the outside drop pipes and back to the outside wall. The protective collar having flanges at each end of the U shaped collar for attaching the collar to the outside wall of the manhole. The U shaped collar, having grooves on the inside for attaching rings, which surround the outside drop pipes. The rings having inside diameters, which vary to fit the size of pipe used by the outside drop such that are size collar works with any size outside drop pipe. An elbow attached to the outside of the manhole wall and to the protective collar such that the outside drop pipe connects to the elbow. Thus the outside drop is totally protected from being moved relative to the manhole which may cause leaks.

REFERENCES:
patent: 4243068 (1981-01-01), Sugda et al.
patent: 4566483 (1986-01-01), Ditcher
patent: 5299596 (1994-04-01), D'Alessandro
patent: 6695002 (2004-02-01), Trangsrud

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