Filter and method for filtering a liquid
AssigneeHubb Filters, Inc.
InventorChristopher M. Hubbard
Life of this patent
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Abstract
An oil filter assembly is disclosed for a machine, such as an internal combustion engine, that has an oil output port and an oil input port. A mounting plate is fixed with an outer enclosure. The mounting plate is further adapted to conduct oil from the machine into a peripheral portion of the outer enclosure, and then returning oil from a central portion of the outer enclosure back to the machine. Oil may pass from the peripheral portion to the central portion through a primary filter having a first porosity. A pressure-actuated valve is fixed fluidly between the portions of the outer enclosure.
Claims12
A method for filtering a liquid, comprising:
- providing a filter assembly comprising:
- (i) a primary filter disposed within an outer enclosure such that a liquid in a peripheral portion of the outer enclosure passes across the primary filter into a central portion of the outer enclosure;
- (ii) a pressure-actuated valve disposed between the central portion and the peripheral portion of the outer enclosure, the valve movable into an open position in response to a pressure differential;
- (iii) a secondary filter disposed within the primary filter and between the pressure-actuated valve and the central portion of the outer enclosure;
- and (iv) a secondary filter housing that at least partially encloses the secondary filter and fixes the secondary filter relative to the primary filter,
- wherein liquid in the peripheral portion of the outer enclosure passes through the secondary filter only when the pressure-actuated valve is in the open position.
A filter assembly, comprising:
- a primary filter disposed within an outer enclosure such that a liquid in a peripheral portion of the outer enclosure passes across the primary filter into a central portion of the outer enclosure;
- a pressure-actuated valve disposed between the central portion and the peripheral portion of the outer enclosure, the valve movable into an open position in response to a pressure differential;
- a secondary filter disposed within the primary filter and between the pressure-actuated valve and the central portion of the outer enclosure;
- and
- a secondary filter housing that at least partially encloses the secondary filter and fixes the secondary filter relative to the primary filter,
- wherein the filter assembly is configured such that liquid in the peripheral portion of the outer enclosure passes through the secondary filter only when the pressure-actuated valve is in the open position.
Dependencies are inferred from the claim text.