Filter and method for filtering a liquid
AssigneeHubb Filters, Inc.
InventorChristopher M. HUBBARD
Life of this patent
Estimating the term…
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.
Claims18
1-18. (canceled)
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;
- and (iii) a secondary filter disposed within the primary filter and between the pressure-actuated valve and the central portion of the outer enclosure,
- wherein the secondary filter has a greater porosity than the primary filter.
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;
- and
- a secondary filter disposed within the primary filter and between the pressure-actuated valve and the central portion of the outer enclosure, wherein the secondary filter has a greater porosity than the primary filter.
A method of cleaning a filter assembly, comprising:
- (a) providing the 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;
- and (iii) a secondary filter disposed within the primary filter and between the pressure-actuated valve and the central portion of the outer enclosure;
- (b) disassembling the filter assembly to isolate one or more components of the filter assembly;
- and
- (c) cleaning the one or more isolated components of the filter assembly.
Dependencies are inferred from the claim text.