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

Claim 0:
1. 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; and
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 service valve assembly including a valve pin defining a longitudinal axis and movable axially in the cross passage from a first position in the closed configuration to a second position in the open configuration.