Pipe seal
US4333662A · kind A · utility
45Cited by
5References
14Claims
0Family size
Inventor
Key dates
| Filing date | Dec 9, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Dec 9, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F5/021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gasket which is particularly suited for sealing the annular space between a pipe and a port in an underground structure is disclosed. The gasket comprises a hollow annular ring which surrounds the pipe and is connected by a narrow neck to a base at least partially embedded in the underground structure. The base has means extending around its outer periphery to mount the seal securely in the manhole and to provide a block against water seepage across the periphery of the gasket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.