Bidirectional gasket having water energizing pockets
USRE34787E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 21, 2013 |
Classification
- Technology area (CPC —)General
Abstract
A bidirectional gasket providing a water-tight seal between an opening in a manhole assembly and a pipe extending into said opening, comprises a T-shaped anchoring portion for embodiment in a manhole opening. A substantially A-shaped pipe engagement portion is joined to the anchoring portion by a slender connecting web facilitating bending of the gasket. The A-shaped portion has "legs" and recesses which form water pockets preventing water from entering. The durometer of the gasket material 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 together and a lower durometer of gasket material. The gasket has enhanced ability to accommodate diameter deflection or ovation in rigid and flexible pipe materials. The A-shaped profile allows for greater angular deflection and/or pipe misalignment compared with conventional connectors. The gasket apex has a recess to locate the voids which, in addition to enhancing mechanical softness of the gasket, also provides the ability to increase gasket compres…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.