Reusable resilient gasket and method of using same
US5916671A · kind A · utility
30Cited by
30References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2848
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved gasket particularly suitable for use in sensitive environments is disclosed. The preferred gasket of the present invention comprises at least one layer of a composite material of porous polytetrafluoroethylene (PTFE) polymer and resilient expandable microspheres. The composite material provides a number of significant advantages over existing PTFE and similar clean gaskets, including better seal under less compressive pressure, sufficient resilience to permit reuse, and retained porosity--allowing pressure equalization in the equipment to occur through the gasket itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.