Bidirectional gasket having water energizing pockets
US5997006A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L5/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bidirectional gasket providing a water-tight seal between a manhole assembly and a pipe, having a T-shaped anchoring portion for embedment in a manhole opening. An A-shaped pipe engagement portion joined to the anchoring portion by a connecting web facilitates bending of the gasket. The A-shaped portion has "legs" and recesses forming water pockets preventing water from entering between gasket and pipe. The gasket durometer enhances the water tight seal of the legs with increasing water pressure. The pipe engaging portion accommodates a greater outside pipe diameter compared with conventional connectors due to reduced volume, by providing voids within the connector. The gasket accommodates diameter deflection or ovation in rigid and flexible pipe materials. The A-shaped profile provides greater angular deflection and/or pipe misalignment allowance compared with conventional connectors. Tapered projections near the apex wipe the pipe external periphery upon insertion and further contribute to compression of the connector in the nose portion, preventing the projection from flipping over during pipe insertion. The web joining the anchoring and pipe engagement portions has a tapered …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.