Combination filter element support and anti-prefill valve
View Patent ↗A combined filter element support and anti-prefill valve is used with an annular filter element having an annular filter media with a hollow core for filtering lubricating oil or fuel. The combined filter element includes a unitary body having an annular portion, wherein the annular portion has annular shoulder extending radially therefrom for supporting the filter element, and a sealing section which engages the end plate over a continuous location which is coaxial with the central spin-on opening. The unitary body has a radially extending plate portion having an axially positioned one-way valve unitary therewith, which valve opens in an axial direction toward the spin-opening. In a preferred embodiment, the one-way valve is configured by a pair of lips which normally abut along a line and separate when subjected to oil or fuel pressure.
1. A combination filter element support and anti-prefill valve for use with an annular filter element having an annular filter media with a hollow core and disposed within a housing, wherein the housing is closed by an end plate having a central spin-on outlet opening and a plurality of spaced radially disposed inlets, the combination comprising:
a unitary body having an axially extending annular portion, wherein the annular portion has at one end an annular shoulder extending radially therefrom for supporting the filter element and a sealing section which engages the end plate over a continuous location which is coaxial with the central spin-on opening, the unitary body being of a single piece, and
the unitary body including a radially extending plate portion defined by a web portion and a peripheral portion, at a second end of the annular portion the plate portion being supported in spaced relation to the end plate only at the peripheral portion of the plate portion, the web portion having an axially positioned one way valve unitary therewith which opens in an axial direction toward the spin-on opening, the one way valve closing to prevent oil or fuel from flowing through the central spin-on opening and into the hollow core of the filter element and opening when fluid is being circulated under pumping pressure.
2. The combination of claim 1 wherein the annular portion is extends axially into the hollow core.
3. The combination of claim 1 wherein the one way valve is a purse valve comprising lips which intersect along a line, the lips projecting away from the hollow core and being biased together at the line, whereby fluid pressure in the hollow core separates the lips along the line to open the one way valve and fluid pressure outside of the filter element applied against the lips urges the lips into engagement along the line to close the one way valve.
4. The combination of claim 3 wherein there are two lips, the two lips being joined by web portions which flex, allowing the two lips to part along the line providing an opening through which the fluid flows.
5. The combination of claim 4 wherein the radially extending plate portion is disposed in spaced relation to the annular shoulder at an end of the annular portion opposite the sealing section to define a chamber for receiving the one way valve.
6. The combination of claim 5 wherein the unitary body is made of rubber.
7. The combination of claim 6 wherein the filter element support and anti-prefill valve are in further combination with a filter cartridge having the annular filter element therein and wherein the annular filter media is a media for filtering engine lubricating oil or fuel.
8. The combination of claim 3 wherein the filter element support and anti-prefill valve are in further combination with a filter cartridge having the annular filter element therein and wherein the annular filter media is a media for filtering engine lubricating oil or fuel.
9. The combination of claim 1 wherein the filter element support and anti-prefill valve are in further combination with a filter cartridge having the annular filter element therein and wherein the annular filter media is a media for filtering engine lubricating oil or fuel.
10. The combination of claim 1 wherein the radially extending plate portion is disposed in spaced relation to the annular shoulder at an end of the annular portion opposite the sealing section to define a chamber for receiving the one way valve.
11. The combination of claim 1 wherein the unitary body is made of rubber.