Spiral wound gasket
US5161807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Sep 30, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L23/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A spiral wound gasket comprises an annulus constituted by a plurality of superposed turns of a profiled metal strip wound upon itself to form a spiral and, interposed between at least some of said superposed turns, a number of turns of a relatively soft sealant material in strip form, the thickness of said metal strip being selected so that prior to use the wound metal spiral is essentially flush with the surface of an associated guide ring and the thickness of the strip of relatively soft sealant material being selected so that prior to use, it projects a significant distance on both sides of the gasket from said superposed metal turns axially of said annulus. The preferred relatively soft sealant material is exfoliated graphite foil, which projects from the metal spiral to define an overall gasket thickness on the order of 25 to 40% greater than that of the guide ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.