Metal gasket
US4948153A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Jun 23, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J2015/085
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A metal gasket has an opening for allowing fluid to pass through the gasket, relatively small through-holes for receiving bolts, and a raised portion surrounding the entire circumference of the opening. The raised portion has a double-bead structure including an inner peripheral bead portion formed by an intermediate flat portion and a first frusto-conical portion which connects the intermediate flat portion with an inner peripheral flat portion, and an outer peripheral bead portion formed by the intermediate flat portion and a second frusto-conical portion which connects the intermediate flat portion with an outer peripheral flat portion. The second frusto-conical portion is inclined at an angle which is smaller than that at which the first frusto-conical portion is inclined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.