Patent ID: 11946439
Assignee: CATERPILLAR INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B | IPC B  F

Claim 6:
7. A fuel filter module for an engine comprising:
a primary filter;
a secondary filter;
a module housing including a primary filter receptacle receiving the primary filter, and a secondary filter receptacle receiving the secondary filter, and having formed therein a primary-side fuel passage, a secondary-side fuel passage, a cross passage connecting between the primary-side fuel passage and the secondary-side fuel passage, and a drain port;
a drain valve movable between a closed position blocking the drain port, and an open position;
a service valve assembly at least partially within the cross passage and adjustable from a closed configuration blocking the primary-side fuel passage from the secondary-side fuel passage, to an open configuration;
the module housing further having formed therein an outgoing pump port fluidly connected to the primary-side fuel passage, an incoming pump port fluidly connected to the secondary-side fuel passage, and a filtered fuel outlet; and
each of the filtered fuel outlet, the drain port, the outgoing pump port, and the incoming pump port opens at an outside surface of the module housing.