Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A pressurized in-line wet screening apparatus for separating oversize particles from a fluid slurry comprising: a rigid, hollow body member capable of withstanding the pressure of the fluid slurry, the body member having a valved slurry inlet port and a slurry outlet port, each port adapted to mate with slurry conduit means; a washer access port opposite from the slurry outlet port; a hollow, open-ended screen assembly fixedly mounted within the body member between the slurry outlet port and the washer access port and in axial alignment with the washer access port; a valved oversize particle discharge port at the lowermost end of the body member adapted to mate with oversize particle conduit means; and retractable backwasher means externally mounted on the body member in axial alignment with the washer access port and the screen assembly, where the backwasher means comprises a fluid discharging spray head adapted to pass from a retracted position outside of the body member, through the washer access port and axially through the interior of the screen assembly during backwashing to dislodge and wash out accumulated oversize particles, and then to withdraw to its retracted position.
Claim 2
Dependent Claim
190 words
A pressurized in-line wet screening apparatus for separating oversize particles from a fluid slurry comprising: a rigid, hollow body member capable of withstanding the pressure of the fluid slurry, the body member having a valved slurry inlet port and a slurry outlet port, each port adapted to mate with slurry conduit means; a washer access port opposite from the slurry outlet port; a hollow, open-ended screen assembly fixedly mounted within the body member between the slurry outlet port and the washer access port and in axial alignment with the washer access port; a valved oversize particle discharge port at the lowermost end of the body member adapted to mate with oversize particle conduit means; and retractable backwasher means externally mounted on the body member in axial alignment with the washer access port and the screen assembly, where the backwasher means comprises a fluid discharging spray head adapted to pass from a retracted position outside of the body member, through the washer access port and axially through the interior of the screen assembly during backwashing to dislodge and wash out accumulated oversize particles, and then to withdraw to its retracted position.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 in which the screen assembly is cylindrical in shape.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 which further includes valve means rigidly mounted between the washer access port and the backwasher means.
Claim 5
Dependent Claim
43 words
The apparatus of claim 1 which further comprises a valved pressurized fluid flush-out port opposite and at the same end of the body member as the oversize particle discharge port, whereby pressurized, auxilliary flushing fluid is admitted to wash out accumulated, oversize particles.
Claim 6
Dependent Claim
16 words
The apparatus of claim 1 in which the axial alignment of the screen assembly is vertical.
Claim 7
Dependent Claim
17 words
The apparatus of claim 1 in which the screen assembly comprises a woven metal wire screen material.
Claim 8
Dependent Claim
19 words
The apparatus of claim 1 in which the screen assembly comprises a rigid filter medium of wedge-shape wire construction.
Claim 9
Dependent Claim
29 words
The apparatus of claim 1 in which the body member and the screen assembly are cylindrical in shape and the screen assembly comprises a woven metal wire screen material.
Claim 10
Dependent Claim
22 words
The apparatus of claim 8 in which the screen assembly is mounted radially offset from the longitudinal axis of the body member.