Head gasket with a check valve
US6305420A · kind A · utility
12Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/791
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A head gasket which acts, when clamped between a head and a cylinder block of an internal combustion engine, to form a seal around at least one lubricant or hydraulic fluid passage which extends between the head and the block. The gasket also comprises a non-return valve which extends across said passage and allows flow of liquid in said passage towards the head but prevents flow of liquid in said passage towards the block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.