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US 6,585,887 B2Granted
End cap relief valve mechanism for a filter
AssigneeChampion Laboratories, Inc.
InventorsLarry Dean Michels, John D. Gaither, Richard Schwarzlose
Life of this patent
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AssigneeChampion Laboratories, Inc.
InventorsLarry Dean Michels, John D. Gaither, Richard Schwarzlose
Estimating the term…
An oil filter includes a housing 14 having an end plate 20 attached to the open end thereof. The end plate 20 includes an outlet opening and inlet openings 22. An anti-drainback valve 49 is provided adjacent the end plate. A filter element having an end cap at each end is positioned within the housing. The end cap 50 remote from the end plate includes a plurality of openings 52 spaced from a closed central portion 51. A spring valve 60 cooperates with the end cap 50 and the interior wall of the housing to alternately allow and disallow oil flow through the end cap openings depending upon the differential pressure across the end cap 50. The spring valve 60 and the end cap 50 can be operationally interengage to provide a relatively flat profile. Depressions 72 (FIG. 5) may be included between the arms 62 of the spring valve to provide a flow path should the spring valve be flattened against the housing during operation of the filter.
In a fluid filter comprising a housing that is open at one end, an end plate connected to said housing and closing said open end, said end plate having at least one inlet opening and an outlet opening therein, an annular filter media disposed in said housing, said filter media having a first end cap adjacent said end plate and a second end cap remote from said end plate, and a valve member for controlling flow of fluid through the inlet opening, the improvement comprising the second end cap having a plurality of openings surrounding a closed central portion thereof and radially outwardly spaced from the central axis of the second end cap and a spring valve cooperating with said second end cap and said housing for controlling the flow of fluid through said openings, said spring valve closing said openings in the central portion of the second end cap to fluid flow, the second end cap being responsive to the pressure within the housing for opening the said openings in the central portion of the second end cap for fluid flow therethrough when the fluid differential pressure across the second end cap exceeds a predetermined value.
An oil filter comprising a housing that is open at one end, an end plate connected to said housing and closing said open end, said end plate having at least one inlet opening and an outlet opening therein, an anti-drain back valve for precluding return flow of oil through the inlet opening, an annular filter media disposed in said housing, said filter media having a first end cap adjacent said end plate and a second end cap remote from the end plate, the second end cap having a plurality of openings surrounding a closed central portion thereof and radially outwardly spaced from the central axis of the second end cap and a spring valve cooperating with said second end cap and said housing to control the flow of fluid through said openings, and for closing said openings in the second end cap remote from the end plate to fluid flow, whereby when the pressure within the housing increases and the pressure differential across the end cap exceeds a predetermined value, the said openings in the end cap remote from the end plate will be opened to permit fluid flow therethrough.
An oil filter comprising a housing that is open at one end, an end plate connected to said housing and closing said open end, said end plate having at least one inlet opening and an outlet opening therein, an anti-drain back valve for precluding return flow of oil through the inlet opening, an annular filter media disposed in said housing, said filter media having a first member at one end and an end cap at the other end, the first member having a plurality of openings spaced radially outwardly from the central axis thereof, the central portion of the first member being imperforate and substantially flat, and valve means cooperating with said first member and said housing for closing said openings in the first member to fluid flow, said valve means comprising a plate-like member having a flattened radial portion radially outward from an annular portion extending from a central portion thereof whereby when the pressure within the housing increases and the pressure differential across the first member exceeds a predetermined value, said openings in the first member will be opened to permit fluid flow therethrough, the valve means and the first member being constructed and arranged to operationally interengage and provide a relatively flat profile that is little more than the height of the first member.
In a fluid filter comprising a housing that is open at one end, an end plate connected to said housing and closing said open end, said end plate having at least one inlet opening and an outlet opening therein, an annular filter media disposed in said housing, said filter media having an end cap at each end, and a valve member for controlling flow of fluid through the inlet opening, the improvement comprising the end cap remote from the end plate having at least one opening in a central portion thereof and a spring cooperating with said end cap remote from the end plate and closing said opening in the central portion of the end cap remote from the end plate to fluid flow, the end cap remote from the end plate being responsive to the pressure within the housing for opening said opening in the central portion of the end cap remote from the end plate when the fluid differential pressure across the end cap remote from the end plate exceeds a predetermined value, the valve member comprising an anti-drain back valve disposed between the end cap adjacent the end plate and the end plate, said spring being constructed and arranged to engage the interior of the housing so as to load the filter media and the end cap adjacent to the end plate to help retain the anti-drain back valve in place, the spring having depressions thereon for providing a flow path should the spring be flattened against the interior of the housing in use.
An oil filter comprising a housing that is open at one end, an end plate connected to said housing and closing said open end, said end plate having at least one inlet opening and an outlet opening therein, an anti-drain back valve for precluding return flow of oil through the inlet opening, an annular filter media disposed in said housing, said filter media having an end cap at each end, the end cap remote from the end plate having at least one opening spaced radially outwardly from the central axis thereof and a spring valve cooperating with said end cap remote from the end plate for closing said opening in the end cap remote from the end plate to fluid flow, whereby when the pressure within the housing increases and the pressure differential across the end cap remote from the end plate exceeds a predetermined value, said opening in the end cap remote from the end plate will be opened to permit fluid flow therethrough, the anti-drain back valve being disposed between the end cap adjacent the end plate and the end plate, said spring valve being constructed and arranged to engage the interior of the housing so as to load the filter media and the end cap adjacent to the end plate to help retain the anti-drain back valve in place and depressions formed on the spring valve for permitting fluid flow between the spring valve and the interior of the housing and providing a flow path should the spring valve be flattened against the interior of the housing in use.
Dependencies are inferred from the claim text.