Two stage filter cartridge
First Claim
1. A fuel filter assembly comprising:
- a base having a central first conduit and a second conduit surrounding the first conduct, the first conduit defining a fuel outlet passage and the second conduit defining a fuel inlet passage; and
a filter cartridge mountable on the base, the filter cartridge comprisingan upper enclosure,a primary filter element disposed within the upper enclosure, the primary filter element and the upper enclosure defining a primary inlet plenum in fluid communication with the fuel inlet passage and a primary outlet plenum,a lower enclosure,a secondary filter element disposed within the lower enclosure, the secondary filter element and the lower enclosure defining a secondary inlet plenum in fluid communication with the primary outlet plenum and a secondary outlet plenum in fluid communication with the fuel outlet passage,first and second water passageways in fluid communications with the primary and secondary inlet plenums, respectively, anda drain-cock movable between open and closed positions to drain water from the first and second water passageways.
1 Assignment
0 Petitions
Accused Products
Abstract
A fuel filter cartridge includes an upper enclosure and a lower enclosure. The upper enclosure includes an upper section having a cavity for receiving a fuel flow, and a lower section joined to the upper section. A primary filter element is disposed within the lower section. The primary filter element and the lower section define a primary inlet plenum in fluid communication with the upper section cavity and a primary outlet plenum. A secondary filter element is disposed within the lower enclosure. The secondary filter element and the lower enclosure define a secondary inlet plenum in fluid communication with the primary outlet plenum and a secondary outlet plenum for discharging the fuel flow from the filter cartridge. The lower enclosure defines first and second passages in fluid communications with the primary and secondary inlet plenums, respectively, and includes a drain-cock movable between open and closed positions to open or close the first and second passages.
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Citations
25 Claims
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1. A fuel filter assembly comprising:
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a base having a central first conduit and a second conduit surrounding the first conduct, the first conduit defining a fuel outlet passage and the second conduit defining a fuel inlet passage; and a filter cartridge mountable on the base, the filter cartridge comprising an upper enclosure, a primary filter element disposed within the upper enclosure, the primary filter element and the upper enclosure defining a primary inlet plenum in fluid communication with the fuel inlet passage and a primary outlet plenum, a lower enclosure, a secondary filter element disposed within the lower enclosure, the secondary filter element and the lower enclosure defining a secondary inlet plenum in fluid communication with the primary outlet plenum and a secondary outlet plenum in fluid communication with the fuel outlet passage, first and second water passageways in fluid communications with the primary and secondary inlet plenums, respectively, and a drain-cock movable between open and closed positions to drain water from the first and second water passageways. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A fuel filter cartridge comprising:
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an upper enclosure including an upper section defining a cavity adapted to receive a fuel flow, and a lower section joined to the upper section; a primary filter element disposed within the lower section, the primary filter element and the lower section defining a primary inlet plenum in fluid communication with the upper section cavity and a primary outlet plenum; a lower enclosure; and a secondary filter element disposed within the lower enclosure, the secondary filter element and the lower enclosure defining a secondary inlet plenum in fluid communication with the primary outlet plenum and a secondary outlet plenum adapted to discharge the fuel flow from the filter cartridge; wherein the lower enclosure defines first and second passages in fluid communications with the primary and secondary inlet plenums, respectively, and includes a drain-cock movable between open and closed positions to open or close the first and second passages. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A fuel filter cartridge comprising:
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an upper enclosure including an upper section defining a cavity adapted to receive a fuel flow, and a lower section joined to the upper section, the lower section having vertically extending inner and outer cylinders, the inner cylinder defining a chamber adapted to discharge the fuel flow; a primary filter element disposed intermediate the inner and outer cylinders, an outer surface of the primary filter element and an inner surface of the outer cylinder defining a primary inlet plenum in fluid communication with the upper section cavity, an inner surface of the primary filter element and an outer surface of the inner cylinder defining a primary outlet plenum; a lower enclosure including a bottom floor defining first and second passages, the first passage being in fluid communication with the primary inlet plenum, an inner wall extending upwardly from the floor, and an outer wall extending upwardly from the floor; a secondary filter element disposed within the inner wall, an inner surface of the inner wall and an outer surface of the secondary filter element defining a secondary inlet plenum in fluid communication with the primary outlet plenum and the second passage, an inner surface of the secondary filter element defining a secondary outlet plenum in fluid communication with the inner cylinder chamber; and a drain-cock movable between open and closed positions to open or close the first and second passages. - View Dependent Claims (23, 24, 25)
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Specification