Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Patent
1999-01-08
2000-09-12
Drodge, Joseph W.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
137503, 210430, 210440, B01D 35157
Patent
active
061173118
ABSTRACT:
A fuel filter for a fuel dispensing pump comprises a shell having a closed end and an open end. A plate is fixed in the open end of the shell. The plate has one or more fuel inlet openings and a centrally located fuel outlet opening. A rigid annular pervious core in located within the shell. A water absorbing media is disposed about the core. A first end cap closes the inner end of the core and the water absorbing media. A second end cap closes the outer end of the core and water absorbing media. The second end cap has a central opening there through. A valve cylinder cup is secured to the second end cap and extends within the central opening in the core. The valve cylinder cup has at least one opening in the side wall thereof. A valve piston is slidably disposed and guided in the valve cylinder cup and movable to open and close the openings in the sidewall of the valve cylinder cup. A valve spring is provided for biasing the valve piston to a position to open the opening in the side wall of the valve cylinder cup. Fuel entering the shell through the inlet openings in the plate, passes through the water absorbing media, the core, the openings in the side wall of the valve cylinder cup, through the valve piston and discharges from the fuel outlet opening, whereby the water absorbing media absorbs the water in the fuel, and as the water absorbing media absorbs more water, the pressure differential increases and the valve cylinder cup moves toward the plate and the opening in the sidewall of the valve cylinder cup is closed and the flow of fuel through the fuel filter is blocked.
REFERENCES:
patent: 4364825 (1982-12-01), Connor
patent: 4870889 (1989-10-01), Wall
patent: 4959141 (1990-09-01), Anderson
patent: 4986321 (1991-01-01), Nitzberg
patent: 5855780 (1999-01-01), Dye et al.
patent: 5989413 (1999-11-01), Jauss et al.
Atteberry W. Scott
Stockhowe John W.
Watson William R.
Champion Laboratores, Inc.
Drodge Joseph W.
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