Sealing structure of cylinder head cover
US4727833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Nov 12, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A structure for mounting a cylinder head cover on an engine cylinder head, having plug holes for mounting ignition plugs. A plug tube is fixedly inserted into each plug hole and the cylinder head cover is mounted on the cylinder head via a sealing gasket. The cylinder head cover has mount holes, each of which is formed in a reverse-conical surface. A grommet having an annular sealing lip is fitted to the upper end of the plug tube and a fastening nut is engaged with a male thread portion of the plug tube to urge the grommet downward so that the sealing lip is sealingly engaged with the reverse-conical face of the cylinder head cover and an outer peripheral surface of the plug tube, so as to tightly seal away oil contained in the cylinder head cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.