Back to results
US 6,319,402 B1Granted
Extended life dual full-flow and bypass filter
AssigneeNelson Industries, Inc.
InventorsBrian W. Schwandt, Peter K. Herman, David M. Stehouwer
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNelson Industries, Inc.
InventorsBrian W. Schwandt, Peter K. Herman, David M. Stehouwer
Estimating the term…
A cleanable backflushable re-usable dual full-flow and bypass filter includes a full-flow filter element providing filtered primary flow therethrough, a bypass filter element providing filtered secondary flow therethrough, a bypass tube conducting flow therethrough from said bypass filter element to said full-flow filter element, a venturi creating a low pressure zone aiding secondary flow through the bypass tube to assist in pulling the secondary flow through the more restrictive bypass filter element, wherein fluid, whether main fluid flow in the filtering direction or backflushing cleansing fluid flow in the opposite direction, flowing from the bypass tube changes direction at the venturi. During a backflushing cleaning cycle, a backflush deflector at the outlet end of the bypass tube in the venturi creates the directional change by changing axial flow of cleansing fluid through the bypass tube to radial flow at the outlet end of the bypass tube in the venturi and prevents straight-through rectilinear flow of cleansing fluid from the bypass tube to the filter outlet. Jets are provided, jumping the cleansing fluid across a radial gap between the bypass tube and the venturi throat to a region outside of the venturi and within the hollow interior of the full-flow filter element, to disperse and backflush the full-flow filter element.
A dual full-flow and bypass filter for filtering fluid from a machine comprising a full-flow filter element providing filtered primary flow therethrough, a bypass filter element providing filtered secondary flow therethrough, a bypass tube conducting filtered secondary flow therethrough after passage through said bypass filter element and then merging said filtered secondary flow with said filtered primary flow after passage of said primary flow through said full-flow filter element, a venturi creating a low pressure zone aiding said secondary flow through said bypass tube to assist in pulling said secondary flow through said bypass filter element, a deflector causing a directional change of said secondary flow at said venturi, such that fluid flowing from said bypass tube changes direction at said venturi.
A cleanable backflushable re-usable dual full-flow and bypass filter for filtering fluid from a machine, comprising:
Dependencies are inferred from the claim text.