Pneumatic safety seal joint made of elastomer with internal septum
US4624465A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Aug 26, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/926
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pneumatic safety seal joint, made of elastomer, generally designed to be installed in a slot or groove, this joint having an inflatable internal volume under the pressure of a fluid, and an external seal surface. The joint has an internal volume with maximum internal width l and a maximum internal height H and has an internal sealed septum which divides the internal volume into two chambers, each with a means for pressurization. This internal septum is connected to the lateral walls of the joint such that the respective volumes of the two chambers are in a ratio between 0.9 and 1.1 and when l/H is between 1 and 2, the developed width L of this sealed septum is between 1.1 times and 1.4 times l, when l/H is between 2 and 8, the developed width L is such that 1.ltoreq.L.ltoreq.1.21. In case of the puncturing of one chamber the internal septum deforms and comes to press against the wall to be sealed, maintaining the seal. The joint improves the safety of seal devices in the nuclear, aerospace, electronic and medical areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.