Bidirectional gasket
US5248154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L5/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gasket for providing a watertight seal between an opening and a cast member and a conduit extending into said cast member, the gasket being an annular member having an outer circumferential portion of inverted T-shaped cross-section for embedment into the opening of the cast member and a flexible web-like portion extending inwardly from said anchoring portion and terminating in an annular enlarged beaded portion. The length of the web is greater than the distance between the outer diameter of the beaded portion and the inner diameter of the anchoring portion to form a curved configuration. The beaded portion has an inner diameter adapted to cause the beaded portion to undergo at least slight expansion when a conduit is pushed through the central opening defined by the beaded portion whereby the over-center position of the beaded portion may be reversed simply by movement of the pipe. An intermediate annular portion of the web is of increased thickness to form an anti-balloon annular section which serves to retain the shape of the center of the gasket and avoids the necessity of making the web of the gasket too thick.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.