Charging hole cover seal
US4389284A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1981 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Dec 28, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10B25/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A charging hole cover sealing structure in which a disc-shape cover is superimposed over the charging hole and an annulus-shaped charging hole frame. The frame has on its top surface a peripheral medial groove and an inner planar surface. The cover has a lip with a terminal downwardly projecting peripheral tongue that engages the medial groove on the frame as the lip abuts its inner planar surface so that dual gas tight seals are established. A primary continuous seal is established at the point where the lip abuts the inner planar surface on the frame. The groove is filled with a heat resistant particulate material which will cause any coke oven gases escaping through this primary seal to be condensed so as to form a particularly effective sealant material made up of a mixture of the resultant tarry condensation with the particulate material. A secondary seal is thereby established between the tongue of the cover and the lid, and the need to manually apply a sealant composition to the charging hole cover is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.