High compressibility gasket material
US4900629A · kind A · utility
38Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A highly compressible gasket material is formed by fusing two filled sheets of PTFE containing dispersed microballoons to a central unfilled sheet of PTFE which provides tensile strength to the material. The two unfilled sheets each constitute from 20% to 25% of the overall thickness of the gasket material. This method provides a unitary gasket assembly having an overall compressibility of 45% or more, but the thicker unfilled PTFE central area of the assembly provides excellent recovery characteristics and resistance to creep relaxation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.