Semipermeable baffle fuel filter
AssigneeParker-Hannifin Corporation
InventorWalter H. Stone
Life of this patent
Estimating the term…
Abstract
A fuel filter has a semipermeable spiral baffle with an open circuitous spiral channel between spiral flights of filter media. Fuel may pass radially (inwardly or outwardly) through the media which preferentially slows water and other contaminants such that the contaminants tend to "settle" in the channel and slowly flow out of the baffle to a contaminant collection zone.
Claims25
An invention comprising a fuel filter having a first fuel zone, a second fuel zone, and a semipermeable baffle;
- said baffle having a plurality of overlapping layers of filter media, each layer spaced by at least the thickness of one of the layers from any adjacent layers to define a circuitous settling channel, each layer having two opposite sides, said channel proceeding from said first fuel zone to said second fuel zone and being open to allow contaminants to flow from said first fuel zone to said second fuel zone without passage through any of said layers of filter media, said semipermeable baffle operable to allow fuel to flow from said first fuel zone to said second fuel zone by passage into one side and out an opposite side of one or more of said layers of filter media such that said filter media preferentially slows contaminants to settle in said channel for movement along said channel, and wherein said fuel filter further comprises upper and lower end caps made of impermeable material disposed at said opposite ends of said baffle to define upper and lower sealed boundaries of said channel, each layer being sealed to said upper and lower end caps.
An invention comprising a fuel filter having a first fuel zone, a second fuel zone, and a semipermeable baffle;
- said baffle having a plurality of overlapping layers of filter media, each layer spaced from any adjacent layers to define a circuitous settling channel, each layer having two opposite sides, said channel proceeding from said first fuel zone to said second fuel zone and being open to allow contaminants to flow from said first fuel zone to said second fuel zone without passage through any of said layers of filter media, said semipermeable baffle operable to allow fuel to flow from said first fuel zone to said second fuel zone by passage into one side and out an opposite side of one or more of said layers of filter media such that said filter media preferentially slows contaminants to settle in said channel for movement along said channel, and wherein said baffle is spiral with two opposite ends and said layers are spirally extending flights, and wherein said fuel filter further comprises upper and lower end caps made of impermeable material disposed at said opposite ends of said baffle to define upper and lower sealed boundaries of said channel, each layer being sealed to said upper and lower end caps.
An invention comprising a fuel filter having a first fuel zone, a second fuel zone, and a semipermeable baffle;
- said baffle having a plurality of overlapping layers of filter media, each layer spaced from any adjacent layers throughout the extent of the layer to define a circuitous settling channel, each layer having two opposite sides, said channel proceeding from said first fuel zone to said second fuel zone and being open to allow contaminants to flow from said first fuel zone to said second fuel zone without passage through any of said layers of filter media, said semipermeable baffle operable to allow fuel to flow from said first fuel zone to said second fuel zone by passage into one side and out an opposite side of one or more of said layers of filter media such that said filter media preferentially slows contaminants to settle in said channel for movement along said channel, and wherein said baffle is spiral with two opposite ends and said layers are sprially extending flights.
Dependencies are inferred from the claim text.