Fuel filter with positive water shutoff
US4959141A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8085
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fuel filter with improved means of preventing water and particulate contaminant from passing therethrough including a cannister, a place secured to the cannister open end having a central fluid outlet and fluid inlet openings spaced from the fluid outlet, a rigid tubular fluid pervious member within the cannister having one end in sealed communication with the plate fluid outlet opening, a flexible filter medium surrounding the outer surface of the tubular member through which fuel really passes but which resists the passage of particulate matter and water, a first deformable washer having an opening therethrough secured to the end of the tubular member opposite that atached to the plate, a ball within the cannister and normally in engagement with the first washer, the ball having a diameter slightly greater than the internal diameter of the washer, and an annular seat between the plate fluid outlet opening and the first end of the tubular member, a second deformable washer member supported concentrically of and adjacent to the annular seal, the first washer being deformable to permit the ball to pass through when a predetermined fluid pressure drop develops across the flexible f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.