MXPA96005525A - Improvements in filter cartridges of retro pressure released, anti-dren - Google Patents

Abstract

The present invention relates to a lubricating oil filter cartridge, comprising a housing with an annular filter element inside, the annular filter element having a hollow core and having an end cap with a projection extending axially internally; the housing includes an end plate having a central outlet therethrough surrounded by a plurality of inlet openings to allow the lubricating oil to enter the housing through the inlet openings in the endplate, for flow through the filter element to the hollow core and to flow out of the filter element through the central outlet, the improvement comprising: an annular valve holder that is disposed between the end plate and the filter element, the annular valve holder it has an inner sleeve that bears against the end plate near the outlet and an outer sleeve spaced from the inner sleeve and includes a plurality of or holes therethrough, the outer sleeve has a radially extending projection extending outwardly to support the annular filter element, and an annular valve member disposed between the filter element and the outer sleeve of the valve support , the annular valve member has a radially extending skirt that overlaps the inlet openings of the end plate, the radially extending skirt functions as an anti-drain back-valve preventing the oil from flowing out of the filter through of the inlet openings while allowing the oil under pressure to deflect the fins to the flow passage of the annular valve member and through the annular filter element when the annular filter element is not clogged, the valve member further includes an expandable collar that fits around the outer sleeve and covers the holes, the expandable collar extends so as not to cover the holes, when the filter element becomes clogged and liquid can flow through the holes in the outer sleeve and through the central outlet to deflect the filter element when the filter element becomes clogged, the expandable collar has a plurality of ribs arranged in spaced relation around, the ribs engage with the internal projection extending axially from the end cap

Description

IMPROVEMENTS IN FILTER CARTRIDGES OF RETRO PRESSURE RELEASED. ANTI DRAINAGE APPLICATIONS FOR RELATED PATENTS This request is a continuation in part of the U.S. Patent Application Serial Number 08 / 653,715, filed May 23, 1996, which is a continuation in part of 08 / 556,595, filed on November 13, 1995.

FIELD OF THE INVENTION The present invention relates to improvements in retro-release filter cartridges released anti-drainage. More particularly, the present invention relates to improvements in valve configurations for such filter cartridges and improvements in the configurations for retaining the annular filter elements and the valve components within the filter cartridges.

BACKGROUND OF THE INVENTION The annular filter elements are mounted in filter housings, to form replaceable filter cartridges, which are threadedly mounted in internal combustion engines. These cartridges are known as "rotary filters" because they are mounted in a threaded and removable form. If a customer follows the recommended procedures for changing the filter cartridge when the lubricating oil is changed, then it is not usual for the filter to clog; however, if the customer fails to change the filter cartridge, or if the lubricating oil becomes contaminated for some other reason, the filter may become plugged or blocked in any other way to minimize the flow of lubricating oil to the filter. motor. If this happens, an engine can be destroyed or seriously damaged. To avoid or at least minimize damage, the filter cartridges have been configured to allow the oil to be diverted to the filter elements in the cartridges, when the filter elements become clogged. Then, the motor is supplied with at least one unfiltered lubricant, instead of without lubricant or insufficient lubricant. It is also advantageous to keep the oil inside the filter cartridge, when the engine is not running, such that when the engine is turned on there is no substantial space in the lubricating oil flow caused by a slight delay as the filter cartridge It is filled with oil. This is done by providing an anti-drain backpressure valve, which is closed when it is not pressurized by the engine oil pump, to prevent draining oil from the back of the filter to the crankcase. Millions of filter cartridges are manufactured every year and millions are discarded. Since these filter cartridges are disposable, the reduction in their cost is highly advantageous. A cost reduction approach is to reduce the number of parts and to simplify assembly. So far, this has been difficult to do, without compromising the effectiveness of the filter cartridges. In cold environments, lower lubricating oil temperatures and mechanical components result in an oil pump pressure of higher filter resistance increased for flow due to the higher viscosity of the lubricating oil. Current oil filters do not have bypass valves, which house both operating temperatures after the heating temperature and low temperature, cold start, which are now designed to occur at valve opening pressures greater than 0.77. g / cm -0.98 kg / cm2 (11-14 psi) instead of 0.56 kg / cm2-0.77 kg / cm2 (8-11 psi). The complexity of the situation is further increased because it is desirable after ignition, that the pressure opening of the bypass valve returns to 0.56 kg / cm2-0.77 kg / cm2 (8-11 psi).

BRIEF DESCRIPTION OF THE INVENTION It is a feature of the present invention to provide a new and improved configuration for return anti-drain / released pressure filter cartridges, which has a further advantage that it will not deprive a motor for high temperature lubricating oil., while compensating the flow of cold lubrication. According to the present invention, a bypass valve is positioned between the inlet and an outlet of a lubricating oil filter cartridge, which allows the oil to be diverted to filter media, if the filter means become clogged . The bypass valve opens at a higher pressure, when the lubricating oil is cold and when it is hot or at operating temperature. In another aspect of the present invention, a lubricating oil filter cartridge includes a housing with an annular filter element therein and an end plate, the end plate having inlet openings therethrough, to allow the unfiltered lubricating oil between the housing and a central outlet to allow the filtered oil to pass out of the filter housing. According to the present invention, the improvement comprises an annular valve holder placed between the end plate and the filter element, the annular valve element has an inner sleeve carried against the end plate near the outlet and an outer sleeve with a plurality of holes therethrough, to allow the lubricating oil to be diverted to the filter element when the holes are not covered by an annular valve member. To support the annular filter element, the annular valve holder further has a radially extending projection, covers the annular filter element. The annular valve member has a flexible skirt, which functions as an anti-drain backpressure valve and an expandable collar fitted around the outer sleeve of the annular valve holder to function as a bypass valve. To function as a bypass valve, the expandable collar normally covers the orifices, and extends to the uncovered orifices when the filter element becomes clogged. Accordingly, the unfiltered lubricating oil normally passes through the annular filter element, but when the filter element becomes clogged, it derives from the annular filter element and flows through the holes in the annular filter holder.

In another aspect of the invention, the annular valve member is positioned between the annular filter element and the outer sleeve of the annular valve holder with the radially extending fin positioned between the radially extending projection of the annular valve holder and filter element. In another aspect of the invention, the annular valve holder is made of metal, which for example, can be made of steel or plastic.

BRIEF DESCRIPTION OF THE DRAWINGS Various other features and advantages of the present invention will be more fully appreciated as it becomes better understood when considered in conjunction with the accompanying drawings, in which similar reference numerals designate the same or similar parts. in all the various lists and in which: Figure 1 is a side view, partially in section of a first embodiment of a back-pressure anti-drain / release filter cartridge, configured in accordance with the principles of the present invention, showing the filter cartridge and a subsequent anti-drain mode, when the filter is connected to a motor which is not working; Figure 2 is an end view of a lower end cap used with a filter element supported on the filter cartridge of Figures 1-3; Figure 3 is a side elevation of the end cap of Figure 2 taken along lines 3-3 of Figure 2; Figure 4 is a side elevation of a valve member in combination and a filter element holder; Figure 5 is an end view of the support of Figure 4; Figure 6 is a side elevation of an annular valve member incorporating the features of the first embodiment of the present invention, which is supported by the annular filter element and the valve member holder of Figures 4 and 5; Figure 7 is a top view of the valve member of Figure 6; Figure 8 is an enlarged view of a portion of the filter cartridge of Figure 1, but showing the filter cartridge in an active filtering mode of the lubricating oil circulating in a running engine; Figure 9 is a view similar to Figure 8, but showing the operation of the filter cartridge in a bypass mode when the filter element is capped; Figure 10 is a side view, partially in elevation, similar to Figure 1, but showing a second embodiment of the annular valve member incorporated in a released, anti-drain, pressure filter cartridge of Figure 1; Figure 11 is a view similar to Figure 4 of the lateral elevation of a valve member in combination and the support of the filter element to support the second embodiment of the annular valve member shown in FIGS.

Figures 10, 12 and 13; Figure 12 is a side elevation similar to Figure 6, but showing the second embodiment of the annular valve member; Figure 13 is a top view, similar to Figure 7, but showing the second embodiment of the valve member of Figure 12; Figure 14 is a side view, partially in elevation of a filter cartridge configured according to a third embodiment of the invention and operating in a normal mode for a lubricating fluid filter; Figure 15 is a view similar to Figure 14, but showing the operation of the cartridge in a bypass mode; Figure 16 is a top view of an assembly including a valve member and a support for the valve member and the filter element used in the embodiment of Figures 14 and 15; Figure 17 is an elevation taken along line 17-17 of Figure 16; Figure 18 is a side view of the filter element and the support of the valve member of Figure 16 and 17; Figure 19 is a plan view of the filter element of the support member of the valve member of Figure 18; Figure 20 is a side elevation taken from lines 20-20 of Figure 19; Figure 21 is a plan view of the valve member of Figures 16-17; and Figure 22 is a side elevation taken along lines 22-22 of Figure 21.

DETAILED DESCRIPTION 1) First Modality - Fiouras 1-9 Now with reference to Figures 1A-3, there is shown a lubricating oil filter cartridge 10 configured in accordance with the present invention, wherein the cartridge comprises an annular filter element 12 configured of means 13 of filaments of conventional folded paper, or some other filter material, contained within a cylindrical housing 14. The annular filter element 12 is concentric with respect to an axis 16 of the cartridge 10 and has a hollow core 18. In Figure 1, the filter cartridge 10 is shown in the normal operating mode, where the oil passes through the filter means 12. The annular filter element 12 has a first end 1S configured as a closed disk-shaped end cap 20 which is in abutting contact by a spring 21 which is seated in a depression 22 within the end cap in the form disk, closed (see Figures 2 and 3). At the second end of the annular filter element 12, there is an annular end cover 23 having an outer axial projection 24 and an inner axial projection 27 surrounding a central opening 28. The inner axial projection 27 is aligned with the hollow core 18 of the filter element. The inner and outer axial projections are connected to each other by means of a radially extending plate 29, which has a rigid annular branch therein.

An end plate encloses the filter element 12 in the housing 14. The end plate 30 includes a threaded outlet 32, coaxial with the shaft 16 of the filter cartridge 10 and a plurality of inlet openings 34 (only one of which shown) is positioned in spaced relationship about the axis 16 of the cartridge 10. The end cap 30 is held near the end of the housing by a cover 36, which is crimped towards the lower end of the housing 14 by a peripheral curl 38 . An annular seal 40 seals the inlet openings 34 with respect to the environment surrounding the filter cartridge 10. Now with reference mainly to Figures 4 and 5, there is shown a valve member in combination and the filter element holder 45, preferably made of metal. The support 45 has an inner sleeve 46 with a coiled, annular reinforcement 48 and an outer sleeve 50, which is connected to the inner sleeve by an arcuate part 52, annular. The outer sleeve 50 has a radial projection 54 extending outward therefrom, the radial projection terminates in a convex upper surface 56. Now with reference to Figure 1, in combination with Figures 4 and 5, it is seen that the filter and valve member bracket 45 sits against the end plate 30 coaxially with the internally threaded outlet 32. The rolled end reinforcement 48 forms an annular base around the outlet 32. As will be explained in more detail in the following, the inner and outer sleeves 46 and 50 of the support 45 are received within the central opening 28 of the cap end 23 shown in Figures 2 and 3. The end cap 23 also covers the radial projection 54 of the combined valve member and the filter element holder 45. Now with reference to FIGS. 6 and 7, a valve member 60 is shown, which is formed of an expandable collar portion 62 and a skirt portion 64. The preferred honeycomb 62 is made of a material such as Grcshen 2624, which is a rubber material available from Goshen Rubber Company. The skirt 64 has a truncated cone portion 66 which has a periphery 67 and a generally radial section 68, which joins the truncated cone section to the expandable collar portion 62. Positioned around the outside of the radial collar portion 62 and a lower section 72 therein is a plurality of flanges 74. The flanges 74 extend slightly to pass through the lower portion 72 of the expandable collar to cover an upper portion 76. The upper portion 76 is separated from the lower portion of the expandable collar 62 by an annular projection 78, narrow. The upper portion has an inner diameter of approximately 1/100 thousandths of an inch less than the lower portion 72. The valve member 60 of Figures 7 and 8 fits or fits on the support 45 of the filter element and the valve member. Combined valve of Figures 4 and 5, as seen in Figure 1, has the annular end cap 23 of the filter element 12 pushed by the coil spring 21. As best seen in Figures 8 and 9, the inner axial projection 27 of the end cap 23 is adjacent to the flanges 74 in the expandable collar 62 and an inner peripheral portion of the plate 29 abuts the portion 68. radially extending from the skirt 64. The truncated cone portion 66 of the skirt 64 falls on the upper convex surface 56 of the radial projection 54 with the peripheral end 67 of the skirt resting on the end plate 30. Normally, when the engine (not shown) to which the basket 10 is connected is not working (see Figure 1), the lubricating oil in the basket is retained in the basket by the skirt 64, owing to the frusto-conical portion 66. of the skirt prevents the lubricating oil from flowing out of the inlet holes 34. Accordingly, the skirt 64 functions as a backpressure anti-drain valve.

As seen in Figure 8, when the engine is running, the frusto-conical portion 66 of the skirt 64 flexes vertically upwards, allowing the lubricating oil to flow in the direction of the arrows 85, in which the lubricating oil flows around the outside of the filter element 12 and is forced radially through the entire hollow core 18 of the first element, from which it then flows through to the internally threaded outside 32 and to the outside of the filter cartridge 10. When the first element 12 arrives to be capped, then the oil can not flow in the path of the arrows 85, because the oil can not pass through the filter means 13 comprising the filter element 12. This forces the oil to apply pressure in the space 53 between the inner sleeve 46 and the outer sleeve 50. The pressure in the space 53 is also applied through the series of holes 58 to the upper portion 76 of the expandable collar 62. As is seen in Figure 9, when the filter element 12 becomes capped, the expandable collar 62 flexes radially outwardly and the oil follows the direction of the arrows 90, through the holes 58 and into the hollow core 18 of the filter element 12. From the hollow core of the filter element 12, the oil exits through the central outlet 32 and is pumped back to the engine without being filtered. Although a lubricating oil following the direction of the arrows 90 is unfiltered, it still provides lubrication to the associated motor. This is, of course, preferable so that the engine receives no lubricant at all, because the filter element 12 is capped. When the motor stops, the upper portion 76 of the expandable collar 62 retracts to its normal position of Figure 1, sealing the holes 58 to prevent oil from draining out of the filter cartridge 10. With the arrangement described above, the unit valve member 60 performs both the functions of pressure mitigation and subsequent anti-drainage without the need for an additional spring. In manufacturing the valve member 60 from a material such as the preferred material, Goshen 2624, the deviation necessary to close the valve member is unitary with its structure. 2) Second Modality - Figures 10 - 13 Now with reference to Figure 10, Figure 10 illustrates a second and preferred embodiment of the invention, in which an annular valve member 110 mounted on a filter cartridge 100 of mitigated, anti-drain posterior pressure has a different configuration from the annular valve member 60 of Figures 1 and 6-9. The annular valve member 110 is mounted on a valve member in combination and a filter element holder 112, which is similar but not identical to the support 45 in Figures 1, 4, 5, 8 and 9. As noted in Figure 10, the annular valve member 110, generally has a thinner cross-section than the annular valve member 60, while the support 112 has a dangling rim 115, which has a smaller radius and slopes towards down at a steeper angle (see Figure 11) than the bracket 45 of Figures 4 and 5. With reference now more specifically to Figures 12 and 13, it is noted that the annular valve member 110 includes an expandable collar portion. 120 and a skirt 122. The expandable collar portion 120 has an inner, cylindrical surface 124 and a cylindrical outer surface 126. The expandable collar portion 12 flexes in substantially the same manner as the expandable collar portion 62 that flexes from the closed position of Figure 8 to the open position of Figure 9. The closed position of Figure 8 is the position of the collar portion 120, when the filter means 12 are not capped and the open position of Figure 9 is the position of the collar portion when the filter means are plugged. The expandable collar 120 is flexed with the upper edge 128 moving outward to reveal the openings 58 in the holder 112 of the filter element, when the filter means 12 is capped and the lubricating oil pressurized. The openings 58 and the support 112 (Figure 11) corresponding to the openings 58 in the support 54 (Figures 4 and 5). According to the second embodiment of the invention, the complete annular valve member 110 is molded from a low expansion silicone elastomer. It has been found that a preferred silicone elastomer is Jasper 4229 silicone which is compression molded. By using Jasper 4229 SILICONE available from Jasper Rubber Company to mold the annular valve 110, the annular valve 110 functions properly, when the filter means 12 is plugged in both a cold flow mode and a normal operating temperature mode. The collar portion 120 of the annular valve 110 has an outer diameter of approximately 3.17 cm (1250 inches) and an inner diameter of approximately 2.79 cm (1100 inches), giving the wall of the collar portion a thickness of approximately 0.38 cm (0.150 inches). The collar portion 120 has a height of approximately 0.482 inches (0.192 inches) and in its base portion 130 joins a ribbed portion 132. The ribbed portion 132 includes a plurality of ridges 134 joined by valleys 136. The ribbed portion is slightly flared to a diameter of approximately 3.51 cm (1,382 inches) and a pedestal portion 140 is attached. The pedestal portion 140 rests on a corresponding flange 142 (see Figure 11) of the support and is held against them by the end plate 29. radially extending, which closes the end of the filter means 12. The flanges 132 extend from the pedestal 140 back toward the cylindrical portion 120 to reinforce the annular valve 110 and allow bending at the base 130 of the annular collar 120. Depending on the pedestal portion 140, in the opposite direction of the base 130 there is a curved portion 144, which falls on the curved rim 115 (see Figure 11) of the valve holder 112. The curvature of the curved portion 144 has a radius of approximately 0.19 cm (0.078 inches). Projecting without support from the curved portion 144 is a skirt portion 150, which forms the anti-drain backpressure valve. The skirt portion 150 has a bed 152 at its end which collects the end cap 30 of the filter assembly 100. In its relaxed state, the skirt portion 150 has a diameter of approximately 5.33 cm (2,100 inches) and is flared from the curved portion 144 around a radius of approximately 0.31 cm (0.125 inches). When installed, the skirt portion 150 is bent upward, such that it is constantly under a deviation to close the inlet openings 34 in the end plate 30. As seen in Figure 12, the skirt portion 150 it is considerably thinner than the expandable collar portion 112 and has, in a preferred embodiment, a thickness of approximately 0.07 cm (0.030 inches). As with the embodiment of Figures 1-9, the skirt portion of the valve 150 can be removed in situations where the subsequent anti-drain function is not desired.

Third Modality - Figures 14 - 22 Now with reference to Figure 14, a third embodiment of the invention is shown, in which a filter cartridge 200, which is similar in many respects to the filter cartridges 10 and 100 of the first and second embodiments, respectively, it uses a different combination valve member and a filter element holder 202, as well as a different valve member 203.

As with the filter cartridges 10 and 100, in the filter cartridge 200, the oil flowing in the arrows 204 during normal operation upon entering the basket 200 through the inlets 34 and flowing through the filter element 12 from the outside. Then the lubricating oil leaves the cartridge 200 by the flow from the central core 205 of the filter element 12 through the central opening 206 of the holder 202 and exits through the central outlet 32 of the cartridge. As seen in Figure 15, an expandable collar 207 having a cylindrical portion 208 expands outwards, when the filter element 12 is capped and causes back pressure. The back pressure formed in the space surrounding the filter element 12 is applied to the interface between the collar 2C-7 of the valve member 2G3 and the support 202 for the valve member. The pressure at the bottom causes the expandable collar 207 to separate from the support 202, due to the pressurized fluid flowing through an opening 212 in a pedestal portion 214. The pedestal portion 214 supports artbas of the filter element 12 and the expandable collar 2CT of the annular valve member 203. Now with reference to FIGS. 16 and 17, it is generally observed that the annular valve member 203 is in many respects substantially similar to the annular valve member 110 of Figure 12. As seen in Figure 17, there is a space 215 in communication with the inlet 34 defined between the inner surface 216 of the cylindrical portion of the annular valve member 203 and the support 202 The pressure in the space 215 remains at a first level during the operation of the motor, when the filter cartridge 200 is operating normally as in Figure 14. When the filter element 12 is blocked, then there is no pressure released and the pressure in space 215 is raised to separate expandable collar portion 207 from support 202 to create space 210 of Figure 15. Now with reference to Figures 18-20, don of the filter element and the annular valve holder 202 are shown in detail, it is noted that the support 202 includes a barrel portion 222 defining the hollow central opening 206 (which is in register with the outlet 32 of the cartridge assembly filter as shown in Figures 14 and 15). As seen in Figure 19, the openings 212 in the flange 214 are defined, by the flanges 226. As seen in Figures 18 and 20, the flanges 226 project above the flange 214 to provide support for the annular valve member 203. An annular flange 228 extends beyond the flanges 226 to provide the support surface for the annular filter element 12. A preferable material for the filter element and the valve holder 202 is glass filled nylon. Now with reference to Figures 21 and 22, where the annular valve 203 is shown, it is observed that the main difference between the annular valve member 203 of Figures 21 and 22 and the annular valve member 110 of Figure 12, is that the annular valve member 203 does not include the ridges and valleys 134 and 136 shown in Figure 13. This is mainly due to the difference in support structure of the support 202 (see Figures 18-20) and the support 45 of the embodiment of Figures 4 and 5. With the support member 202, the annular valve member 203 is supported by the flanges 226 and the rim 228, rather than by a cylindrical outer sleeve 5C. As the annular valve member 113, the annular valve member 2C3 is molded from a low expansion silicone elastomer, such as silicon Jasper 4229, available from Jasper Rubber Company, which is compression molded silicone. By molding the annular valve members 110 and 203 of low expansion silicone materials, such as SILICOS? As 4229 and suitably dimension the collar portions 120 and 208, the valve members are compensated for the cold flow filtration, while not undernourishing a motor for high temperature oil, when the filter medium reaches. be covered. In addition to this point, manufacturers of the original equipment engine are producing opening pressures of the bypass valves for filters which filter the lubricating oil. This is due to higher flow rates of unfiltered oil during cold start. During normal operating temperatures, the opening pressure is in the range of approximately 0.56 kg / cm2-0.70 kg / cm2 (8-10 psi), but for cold ignitions, new design parameters specify the opening pressures in the range of approximately 0.77 kg / cm2-0.91 kg / cm2 (11-14 psi). The annular valve members 110 and 203 adjust this situation by using low expansion silicone, which increases in elasticity as the temperature increases. In cold environments, low temperatures, lubricating oil and mechanical components increase the viscosity of the oil, resulting in oil pumps that produce higher pressures. The silicone elastomer of the valve members 110 and 203 increases in the elastic modulus and temperature resistance as the temperature decreases, resulting in higher opening pressures for example, of G.77 kg / cm2-0.98 kg / cm2 (11-14 psi) at temperatures of, for example, -34 ° C (-30 ° F) and decrease in opening pressures at engine operating temperatures of 82.22 ° C (180 ° F). Typically, this standard opening pressure at 82.22 ° C (180 ° F) of a heated engine is in the range of 0.56 kg / cm2-0.70 kg / cm2 (8-10 psi). Using the second embodiment of the invention, when the filter means 12 becomes capped, the deflection of the filter means is effective over a wide temperature range to minimize engine damage due to unrotated lubricants. From the foregoing description, one skilled in the art can easily evaluate the essential characteristics of this invention and without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various uses and conditions.

Claims (19)

1. CLAIMS 1. In a lubricating oil filter cartridge, a housing with an annular filter element therein; the annular filter element having a hollow core, the housing includes an end plate having a central outlet therethrough, surrounded by a plurality of inlet openings to allow lubricating oil to enter the housing through the openings of entry into the end plate, to flow through the filter element to the hollow core thereof and to flow out of the filter element through the central outlet, where the ^ ^ cra is characterized by comprising: a support annular valve placed between the end plate and the filter element, the annular valve holder having an inner sleeve carried against the end plate near the outlet and an outer sleeve separated from the inner sleeve and including a plurality of holes a through them, the outer sleeve has a radially extending projection, which extends outwardly therefrom to support the annular filter element; and an annular valve member having a skirt that extends radially over the inlet openings in the end plate, the radially extending skirt functions as an anti-drain back pressure valve preventing the oil from flowing out of the filter to through the inlet openings, while allowing the oil under pressure to flex the fins and the flow to pass to the annular valve member and through the annular filter element, when the annular filter element is not capped, the valve member includes In addition to an expanded collar fitted around the outer sleeve and covering the holes, the expandable collar extends to reveal the holes, when the filter element is capped, so that the liquid can flow through the holes in the outer sleeve and through the central outlet to deflect the capped filter.
2. 2. The improvement in accordance with the claim 1, characterized in that the annular valve member is positioned between the filter element and the outer sleeve of the valve holder.
3. 3. The improvement in accordance with the claim 2, characterized in that the filter element has an end cap with an axially extending, internal projection, the axially extending inner protrusion of the end cap engages the expandable collar.
4. 4. The improvement according to claim 2, characterized in that the expandable collar includes a plurality of flanges placed in spaced relation around the flanges engaging the extending axially inner protrusion of the annular end cap.
5. 5. The improvement according to claim 1, characterized in that the expandable collar is cylindrical and terminates outside the second sleeve portion of the annular valve holder.
6. 6. The improvement in accordance with the claim 5, characterized in that the valve member is made of a resinous, elastic material.
7. 7. The improvement in accordance with the claim 6, characterized in that the valve member is made of high modulus, low expansion silicone.
8. 8. The improvement in accordance with the claim 7, characterized in that the support of the annular valve is made of steel or plastic.
9. 9. The improvement according to claim 1, characterized in that the annular valve member is made of a resilient resinous material and includes a plurality of flanges positioned between the skirt and the expandable collar.
10. 10. The improvement according to claim 9, characterized in that the support of the annular valve is made of steel or plastic.
11. 11. In a lubricating oil filter cartridge for a machine operable at a low ignition temperature and at an operating temperature, the filter means therein and a primary path for the lubricating oil from an inlet in the cartridge through the means of filter and out of an exit, when the filter means are uncovered and a bypass path to derive the filtering means that goes off from the inlet to the outlet, when the filter means are covered, wherein the improvement is characterized in that it comprises: Bypass positioned between the inlet and the outlet, by the bypass valve which is configured and arranged to open at a selected pressure indicating that the filter means are plugged, the selected pressure is higher at low temperatures than at the operating temperature.
12. 12. The improvement in accordance with the claim 11, characterized in that the bypass valve comprises an elastic material sensitive to temperature, having an elastic modulus which increases as the temperature decreases.
13. 13. The improvement in accordance with the claim 12, characterized in that the material is high modulus silicone, of little expansion.
14. 14. The improvement in accordance with the claim 13, characterized in that the bypass valve is a collar mounted on a cylindrical support, the cylindrical support is mounted between the inlet and the outlet and has openings through it covered by the collar, when the filter is uncovered and the lubricating oil It is pressurized and uncovered by the collar when the filter is capped and the lubricant is pressurized.
15. 15. The improvement in accordance with the claim 14, in which the collar also includes a skirt that hangs from there, which is placed at the entrance, the skirt is a counter-drain valve anti-drain and diverted to close the intake, if the lubricating oil is unpressurized and for Open the inlet if the lubricating oil is pressurized.
16. 16. The improvement according to claim 11, characterized in that the bypass valve is configured as a valve member mounted on an annular support, wherein the annular support includes a cylindrical portion aligned with the outlet of the cartridge and a pedestal portion. which extends radially, with a plurality of openings therethrough and in which the valve member includes an expanded collet portion positioned around the cylindrical portion and a skirt portion which is placed on the pedestal portion, thus that the filter means become capped, the expandable collar separates from the cylindrical portion of the holder, allowing the lubricating oil to flow from the openings in the pedestal and between the expandable collar and the cylindrical portion of the holder.
17. 17. The improvement of coníonr. with the claim 16, characterized in that the skirt portion extends to be placed over the inlet to provide a diverted anti-drain backpressure valve to close the inlet, if the lubricating oil is unpressurized and to open the inlet of the lubricating oil if it is pressurized.
18. 18. The improvement in accordance with the claim 17, characterized in that the filter means are annular filter media, which are supported by the support pedestal portion.
19. 19. The improvement according to claim 18, characterized in that the material is silicone of high modulus, of pooa expansion. 23. The re; in accordance with claim 16, characterized in that the material is high modulus silicone, of tota x ar.á én. SUMMARY A filter cartridge has an annular filter element retained within a housing by an end plate. The end plate has a central outlet and a plurality of entry holes. Mounted on the end plate is an annular valve holder, which supports an annular valve member positioned between the valve holder and the filter cartridge. A coil spring pushes the annular filter member against the valve member which in turn engages the valve holder and pushes the valve holder against the end plate. The valve holder has an inner sleeve portion, which sits against the end plate and an outer sleeve portion with openings therethrough. The valve member has an expiratory collar portion, which normally seals the bypass ports and a skirt portion, which normally seals the entry ports. When the filter is filtering lubricating oil for an internal combustion engine, the skirt is deflected by pressurized lubricating oil and flows around and through the filter element before passing out of the central outlet on the end plate. When the engine is not working, the oil in the filter cartridge is blocked from flowing back out of the inlet holes in the mounting plate. If the media of the filter element becomes plugged, then the pressure is exerted through the bypass ports in the valve holder and applied to the expandable collar of the valve member. The pressure causes the expandable cell of the valve member to expand so as not to cover the bypass ports. The lubricating oil comes through the by-pass ports and exits 1 = central outlet opening without having to pass through the filter. Preferably, the valve member is made of a teak expansion head, which requires greater pressure to expand at the low cold start temperature than at operating temperatures.