Pipe seal for concrete structures
US5979908A · kind A · utility
7Cited by
8References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L41/088
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus including an elastomeric gasket and a rigid holder therefor for resiliently connecting a sewer pipe in the wall opening of a concrete manhold to prevent leakage through the connection under extreme conditions of ground settling and overhead loading. The base of the gasket is anchored in the opening with its interior surface in flush alignment with diverging surfaces of the wall opening and having an inside diameter substantially corresponding to the outside diameter of the pipe for a press fit. The holder is preassembled with the gasket for casting of a port in a wall in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.