Snap latch filter ring for a fuel injector
US5820754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | May 13, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/4084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter ring for use around the circumferential fuel and timing fluid inlets of a diesel engine fuel injector or similar fluid conducting body. In a first preferred embodiment, the filter ring includes first and second semi-annular, band-shaped filter portions, an integrally formed hinge for pivotally interconnecting the filter portions, and a snap latch mechanism for releasably connecting the opposite ends of the filter portions. In a second preferred embodiment, the filter ring includes a pair of substantially identical snap latch mechanisms for detachably interconnecting the filter portions. The snap latch mechanism is formed from a bead or projection that extends substantially along the entire height of the end of one of the filter portions, and a complimentarily shaped groove on the end of the other filter portion. The thickness of the bead and groove is less than the thickness of the opposite ends of the band-shaped filter portions so that the inner diameter of the resulting filter ring seats securely around a complimentarily shaped annular recess in the fuel injector. The hinge and snap latch mechanisms allow the filter ring to be removed without damage, whereupon it may be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.