公开(公告)号：US3759280A

公开(公告)日：1973-09-18

申请号：US3759280D

申请日：1971-05-24

Applicant: INTERPACE CORP

Inventor： SWANSON H

IPC: E02D29/12 ,  F16L5/02 ,  F16L41/00 ,  F16L5/00

CPC classification number: F16L41/002 ,  E02D29/12 ,  E02D29/122 ,  F16L5/02 ,  Y10T137/6991

Abstract: A seal is here taught for use between a concrete side wall of a manhole installation and a pipe which penetrates through the side wall. Pipes for use in this service generally have rough cylindrical outer surfaces which are not truly round. The seal includes an elastomeric sleeve which is positioned about the outer surface of the pipe and which is clamped at one of its ends thereto. The sleeve is provided at its other end with an outwardly-flared flange. The flange may be attached to the wall by means of a firm annulus and bolts or the like. In a preferred embodiment the flange is cast into the wall and has corrugations to insure good bond therewith. The sleeve can be positioned within the hole, out of harms way, while the concrete wall is being poured.