Bimetallic spiral wound gasket
US4673187A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Jul 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/932
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A temperature-sensitive gasket comprised of an annular ring formed by alternating layers of a spirally wound bimetallic strip and an adjacent strip of soft filler material, such as Teflon. When viewed in cross-section, the bimetallic strip has a centrally located V-shaped fold in an otherwise flat surface. Differences in the relative rates of thermal expansivity between the convex surface and the concave surface of the bimetallic strip cause the edges of the strip to spread apart, providing a reversably tighter seal between the surfaces adjacent the gasket. The spiral wound bimetallic and filler strips are also used in combination with annular compression rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.