Fuel filter with valve indicator
US7182855B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jan 15, 2004 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Mar 6, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/147
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fuel filter includes a first filter chamber, a second filter chamber and a valve assembly disposed between the first and second filter chambers. The valve assembly includes a valve casing with a valve head connected to a flag indicator slidably disposed within the valve casing and movable between a first and second position. A port located in the valve casing allows fuel to flow from the first filter chamber to the second filter chamber when the valve head and flag indicator moves from the first position to the second position. A transparent portion of the valve casing allows the flag indicator to be visible in the second position allowing a user to determine that the fuel filter must be serviced or removed and replaced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.