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US 4,502,956 AGranted
Filter assembly
AssigneeRacor Industries, Inc.
InventorsMichael E. Wilson, David R. Olson, Walter H. Stone, Robin B. MacDonald
Life of this patent
Estimating the term…
Abstract
A fuel filter assembly in which a filter cartridge, threadedly supported from a mounting unit, engages and supports a contaminant collection bowl having a plurality of collection zones respectively upstream and downstream of fuel treatment means within the cartridge. In general, a dual media filter element includes a flow passage axially thereof with means at one end for carrying the filter element from a support head, and means on the other for supporting a contaminant collection bowl beneath. A primer pump disposed axially of the filter element moves between advanced and retracted position therealong.
Claims29
A filter assembly adapted to remove contaminants from liquid fuel comprising:
- (a) a body;
- (b) a first filter media and a second filter media disposed within said body;
- (c) a contaminant collection bowl means supported by said body and defining first and second collection zones, each collection zone disposed to collect liquid contaminants as fuel passes through the assembly, said first collection zone is upstream of both said first and second filter media and said second collection zone is downstream of said first filter media and upstream of said second filter media;
- and
- (d) means common to both said first and second collection zones for simultaneously draining contaminants from said first and second collection zones, and
- wherein, in operation, said first and second collection zones are completely walled off from each other with the only communication between said first and second collection zones being through said body by way of a first contaminant outlet and at least one second contaminant outlet.
3 more elements
A filter assembly adapted to remove contaminants from liquid fuel comprising:
- (a) a filter cartridge having a body and filter media disposed therein, said body having a fuel input port and a fuel outlet port and first and second contaminant outlets, said first and second contaminant outlets disposed on a first side of said body;
- (b) a contaminant collection bowl supported by said body and releasably engaged to said first side of said body, said collection bowl having separate first and second collection zones, said first collection zone disposed to collect liquid contaminants from said first contaminant outlet as fuel passes through the assembly, said second collection zone disposed to collect liquid contaminants from said second contaminant outlet as fuel passes through the assembly;
- and
- (c) means common to both said first and second collection zones for simultaneously draining contaminants from said first and second collection zones.
1 more element
A filter assembly adapted to remove contaminants from liquid fuel comprising:
- (a) a filter cartridge having a body and filter media disposed therein, said body having a fuel inlet port and a fuel outlet port and first and second contaminant outlets, said first and second contaminant outlets disposed on a first side of said body;
- (b) a contaminant collection bowl supported by said body and releasably engaged to said first side of said body, said collection bowl having separate first and second collection zones, said first collection zone disposed to collect liquid contaminants from said first contaminant outlet as fuel passes through the assembly, said second collection zone disposed to collect liquid contaminants from said second contaminant outlet as fuel passes through the assembly;
- (c) first and second drain ports for respectively draining said first and second collection zones;
- and
- wherein, in operation, said first and second collection zones are completely walled off from each other with the only communication between said first and second collection zones being through said body by way of said first and second contaminant outlets, and wherein said first contaminant outlet is upstream of all of said filter media and said second contaminant outlet is downstream of at least a portion of said filter media.
2 more elements
A filter assembly adapted to remove contaminants from liquid fuel comprising:
- (a) a filter cartridge having a body and filter media disposed therein, said body having a fuel inlet port and a fuel outlet port and first and second contaminant outlets, said first and second contaminant outlets disposed on a first side of said body;
- (b) a contaminant collection bowl supported by said body and releasably engaged to said first side of said body, said collection bowl having separate first and second collection zones, said first collection zone disposed to collect liquid contaminants from said first contaminant outlet as fuel passes through the assembly, said second collection zone disposed to collect liquid contaminants from said second contaminant outlet as fuel passes through the assembly;
- (c) first and second drain ports for respectively draining said first and second collection zones;
- and
- wherein, in operation, said first and second collection zones are completely walled off from each other with the only communication between said first and second collection zones being through said body by way of said first and second contaminant outlets, wherein said first contaminant outlet is upstream of all of said filter media and said second contaminant outlet is upstream of at least a portion of said filter media.
2 more elements
An invention comprising a filter bowl unit adapted to be removably attached underneath a filter cartridge which uses radially outward flow through an annular filter media to separate contaminants from fuel, said bowl unit comprising:
- (a) a centrally located first contaminant collection zone for receiving contaminants from a first contaminant outlet in the filter cartridge;
- (b) second contaminant collection zone for receiving contaminants from a second contaminant outlet in the filter cartridge and disposed around said first contaminant zone;
- (c) a wall separating said first and second contaminant collection zones and, in operation, the bowl unit allowing communication between said first and second contaminant collection zones only by way of the first and second contaminant outlets;
- (d) threads on said bowl unit and operable to connect said bowl unit to mating threads on the filter cartridge, and
- (e) means common to both said first and second contaminant collection zones for simultaneously draining contaminants from said first and second contaminant collection zone.
2 more elements
A filter cartridge adapted to remove contaminants from liquid fuel comprising:
- (a) a cylindrical body;
- (b) an annular first filter media disposed within said body;
- (c) radially spaced first and second contaminant outlets disposed on a first side of said body, said first contaminant outlet is upstream of all of said filter media and said second contaminant outlet is upstream of at least a portion of said filter media;
- (d) a fuel inlet port and a fuel outlet port disposed on a second side of said body, said second side opposite said first side;
- and
- (e) threads on said first side for removably attaching a collection bowl unit to said body to receive contaminants passed out through said first and second contaminant outlets, and
- wherein said threads are centrally located on said first side and said first contaminant outlet is within said threads and said second contaminant outlet is outside of said threads.
4 more elements
Dependencies are inferred from the claim text.