Element exchange type filter
US5876600A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/17
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An engine oil filter has an upper cap and a lower case or plate, which are engageable with each other through a projecting portion and a groove portion. In one mode, the projecting portion is inserted into a first longitudinal groove wall and moved along a contact surface of a first skewed groove wall, whereby the cap and the case are moved and fitted together in an axial direction. As axial movement caused by relative rotation between the cap and the case takes place, an O-ring is tightly fitted therebetween at a fixed seal position. This engagement process applies no excessive force to the O-ring so that a sealed state of high reliability is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.