MXPA98010680A - Screw filter and mi manufacture method - Google Patents

Abstract

A screw-in filter including an improved base plate, preferably die-cast aluminum, and an improved crimped lid, preferably die-cut from steel sheet. The base plate includes a core or center joined to a ring by ribs. The ring includes grooves that receive tabs that come out of the punched and engaged cover, to transfer the torque between the can and the base plate. The base plate provides the seat so that the hinged lid fits into the base plate to form the groove of the outer package. The base plate provides the inner wall of the groove, while the engaged lid provides the outer wall of the groove and the base. The design of the invention of the base plate and the hinged lid provides a groove to receive the outer package and to transfer the torque, without the need for complex fabrication or cost

Description

SCREW FILTER AND MANUFACTURING METHOD OF THE SAME FIELD OF THE INVENTION This invention relates to a filter for separating contaminants from fluids such as lubricating oil, hydraulic fluid and the like. More specifically, this invention relates to a screw filter adapted to be threaded into a coin adapter of a hydraulic circuit, lubrication system or other fluid system.

BACKGROUND OF THE INVENTION Screw-in filters are commonly used to separate contaminants from a fluid. Bolt-on fillets are normally mounted on a mounting adapter of a fluid circuit and receive and return fluid therefrom. Bolt-on filters usually include a steel can housing a filter element, which has a closed end and an open end. At the open end, the filter has a connection for the mounting adapter. The connection requires a flow path to the can for the contaminated fluid and a flow path out of the can for the filtered fluid. Threaded base plates have usually been used for the connection. P1700 / 98MX It is known that there are many applications of lower pressure and several higher pressure that can be satisfied by screw type filters. For lower pressure applications, lower resistance filters, pressures less than 100 p.s.i. are used, for example in an automotive lubrication circuit. The applications present in the hydraulics frequently use differential pressure between the high resistance filters. These high-strength filters are used in the hydraulic circuits of heavy machinery for use in industries such as agriculture or construction, for example, a hydraulic backhoe loader that energizes the movement of the shovel. In these hydraulic circuit applications, the filter must withstand the high pressure inside the filter and the ambient pressure on the outside of the filter. These applications may require that the filter be capable of withstanding pressure spikes that are in excess of 750 p.s.i. and an impulse resistance of at least 0-300 p.s.i. for extended periods without leaks or failures. Due to the high pressure requirements, it is preferable to have a high tensile strength in the base plate. It is also desirable to provide a base plate that has a low manufacturing and assembly cost in the filter. For motherboards it has been commonly used P17CC / 98MX to zero die-cut. However, die-cast aluminum baseplates have provided the best strength and their manufacture ordinarily costs less. Therefore, it is desirable to incorporate an aluminum base plate in the filter. However, as will be discussed, aluminum-type plate filters have had manufacturing, assembly, and cost disadvantages when an adequate connection to the mounting adapter of a hydraulic circuit is provided. So far when considering the reliability and convenience of the user, an important element in bolt-on filters is an outer package that will remain in position in the filter until it is secured or immobilized in a seal relationship with the mounting adapter. a hydraulic circuit. External packing prevents leakage of fluid between the mounting adapter and the filter. Frequently, the outer package is installed and secured preferably in an external groove in the filter. Particularly it is desirable to secure the outer packing in the groove, so that it does not fall during transport or installation. To retain the outer package, at least one of the walls of the groove normally includes a taper or reverse slope and / or a mechanism for catching or stopping the outer package in the groove.

P1700 / 98MX It is also common for type filters screwed that the base plates have been attached to the boat. The bursting resistance requirements of a filter require or require a latching clamping technique that provides a connection capable of withstanding the applied pressure differential of the fluid pressure inside the filter to the ambient outside. The clamping technique also requires the transfer of torque. The torque transfer has been necessary in the screwed filters, because the threaded connection is normally on the base plate. When the canister is screwed or unscrewed from the adapter, the torque is transferred from the steel canister to the base plate. Several methods and mechanisms have been used to attach the base plates to the steel can. A common way of holding the can and the base plate has been to use a hinged lid. The engaged covers are usually punched from steel sheet. The outer edge of the hinged lid meshes with or engages an edge of the side wall of the can to form a gasket. This engargolada and engargolado cover are shown and described in the Patents of the United States Nos. 5,490,930, de Krull and 5,453,195, Jorgenson et al., Both assigned to the present assignee. As shown and described in the '195 of Jorgenson patent P1700 / 98MX et al., The technique of the hinged lid has sufficiently secured the base plate to the can. However, a drawback of many previous hinged cover approaches has been that the hinged cover is welded to the base plate which provides the torque transfer necessary for the screwed filters. Welding has not allowed aluminum base plates. In addition, the step of welding can increase manufacturing costs. Another disadvantage of the prior clamping lid fastening techniques has been that the groove retaining the outer packing, which is normally U-shaped, has commonly been formed completely in the hinged lid. In this way, it has been necessary an additional formation and embedding of the steel sheet which has reduced the resistance and increased costs. The hinged steel covers have also been interlaced with die-cut steel base plates that provide the necessary torque transfer. The hinged covers of these filters have provided tabs that are bent through oil inlet ports of the base plate to provide torque transfer. However, this design undesirably has a substantially flat base plate. The flat base plate design has been necessary to provide a less formed and flatter structure in the P17C0 / 98MX hinged lid. These flat base plates are undesirable, because they do not allow the desired structural features that increase the strength of the aluminum base plate type filters for high pressure applications. Another very important disadvantage of these flat base plate filters has been that the outer groove is formed entirely by the hinged lid. The formation of the steel sheet has been necessary to form the groove retaining the outer packaging and the retention mechanism of the outer packaging in the engaged lid, which has the aforementioned cost and strength disadvantages. Other designs from the past have fastened the base plate directly to the can without a hinged cap as shown in U.S. Patent No. 5,080,787; 4,743,374 and 4,834,885. Some of these filter designs have provided die-cast aluminum base plates and high pressure applications. Filters without a lanyard generally form the edge or wrap the open end portion of a can on a preformed shoulder in the base plate. However, filter designs without a hinged lid have had manufacturing disadvantages and require additional machining. Specifically, it has been difficult to provide satisfactory resistance to bursting while P1700 / 98MX at the same time provides the torque transfer between the can and the base plate and a groove for external packing. Frequently, additional embossing of the can has been necessary to provide a retention groove and torque transfer which can reduce the filter strength and increase the manufacturing cost. Another disadvantage is that additional geometry and small tolerances have often been necessary during pressure casting of the aluminum base plate to provide a retention groove. In this way, the manufacture of filters without hinged lid has required an additional geometry in the base plate, additional parts and / or an additional complex machining to draw the steel sheet of the can around the base plate to hold in shape enough the base plate to the can and provide a retention groove.

SUMMARY OF THE INVENTION A general objective of the present invention is to provide a filter having a base plate and a hinged lid with improved focus to provide a groove for external packaging while sufficiently holding the base plate to a can. Another general objective of the present invention is P1700 / 98MX provide a hinged lid and base plate that can be used in high pressure hydraulic circuits in addition to other lower pressure applications. Another general objective of the present invention is to provide a filter that has a low base plate cost and a low key cap cost with low filter assembly costs. A specific object of the present invention is to provide a crimped lid type filter using a die-cast aluminum base plate that provides the strength. Another specific object of the present invention is to provide a filter having a snap cap that is easily punched but can be securely fastened to a structural base plate to provide torque transfer and burst resistance. In this regard, it is an additional object to provide said filter with an integral and reliable external packing retention groove. Another specific object of the invention is to provide a method of manufacturing a filter with limited formation of the steel sheet to provide a retention groove of the outer package. In the achievement or achievement of these objectives, it is a P1700 / 98MX particularity that the present invention provides a simplified low cost base plate unit. The baseplate unit comprises a base plate and a hinged lid that easily intertwine or mate without expensive assembly or manufacture. Another particularity of the present invention is that the base plate interlocked or coupled with the crimped lid provides a retention groove for the outer packing. The base plate provides an inner groove wall and a seat flange for receiving the key-cap. The hinged lid fits on the seat to complete the formation of the groove for external packaging. The hinged lid provides the base and outer wall of the groove. Another peculiarity is that the base plate and the hinged lid are interlocked or mated to provide the transfer of torque between the base plate and the filter canister. The hinged lid provides tabs that fit easily through slots located in an outer ring of the base plate. By folding the tabs around a portion of the hoop of the base plate, the base plate is secured to the hinged lid. Another particularity of the invention is to reduce the steps necessary during the manufacture of the filter. In accordance with this, the steel sheet is die-cut P1700 / 98MX easily to form a hinged lid having a generally stepped shape. The hinged lid provides tabs that fit through slots in the base plate. The tabs are then crimped or crimped to the base plate to form the base plate unit. The base plate unit is then hinged to the can to complete the filter. Another particularity of the invention is to provide the adaptation of the filter for applications of lower or higher resistance. The present invention comprises an aluminum base plate that provides structural features for improved bursting resistance. According to one embodiment of the invention, two internal seals are provided to reduce the fluid pressure on the bracket or joint, which improves the bursting resistance. A circular vertical flange on the hinged lid and a groove that houses the cylindrical channel on the base plate improve the strength characteristics. The tabs are additionally folded around a thicker ring portion of the base plate to also improve the strength these and other objects and advantages of the invention will become more apparent from the following detailed description when considered in conjunction with the accompanying drawings.

P1700 / 98MX BRIEF DESCRIPTION OF THE DRAWINGS OR FIGURES Figure 1 comprises a cross-sectional view of a filter in accordance with a preferred embodiment of the present invention wherein the hidden lines show a mounting adapter to which the filter is connected. Figure 2 is a sectional and perspective view of a base plate unit in accordance with the same invention. Figure 3 is a perspective view of the bottom or bottom of a base plate unit in accordance with the same invention. Figure 4 comprises a pre-assembled exploded view of a can that houses the filter element, to the base plate and to the hinged lid in accordance with the same invention. Figure 5 is a fragmentary and enlarged cross-sectional view, taken around line 6 of Figure 1 but, in a pre-crimped state showing the retention groove after the formation of a neck in a can. Figure 6 is a fragmentary and enlarged cross-sectional view taken around the line 6 of Figure 1 showing a retention groove in a post-engaging state, with the outer packing. P1700 / 98MX Figure 7 is a fragmentary cross-sectional view of a filter illustrating an alternative embodiment of the present invention that shows the additional features of resistance improvement for high pressure applications. Figure 8 is a fragmentary cross-sectional view of a filter illustrating an alternative embodiment of the present invention. Figure 9 is a fragmentary cross-sectional view of a filter illustrating an alternative embodiment of the present invention. While the invention is susceptible to various modifications and alternative constructions, certain illustrative embodiments thereof have been shown in the drawings and will be described in detail below. However, it should be understood that there is no intention to limit the invention to the specific forms disclosed but, on the contrary, the invention is to cover all modifications, alternative constructions and equivalents that fall within the spirit and scope of the invention as described by the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED MODALITY Turning to the drawings, first the P1700 / 98MX attention to a first embodiment represented in Figures 1-6 exemplifying the various embodiments of the present invention. Attention will then be directed to Figures 7-9 which illustrate the preferred features that improve strength and other features not provided to the filter shown in Figure 1. For purposes of illustration and referring to Figure 1, the preferred embodiment of the invention it has been shown in the drawings to take the form of a screw filter 10, normally used to filter a contaminated fluid. The filter is rotated on a threaded portion of a mounting adapter 11 in a fluid circuit. As can be appreciated by those skilled in the art, the mounting adapter 11 includes an outlet for the contaminated fluid and an inlet for the filtered fluid. The filter 10 includes a deep-drawn canister 12 made of steel sheet of relatively coarse gauge. The can 12 has a closed end 14, a longitudinally extending cylindrical side wall 16 and an open end 18. A base plate unit 19, shown separately in more detail in Figures 2 and 3, is held at the end open 18 of the can 12 and provides a fluid connection to the mounting adapter 11 of the hydraulic circuit.

P1700 / 98MX The canister 12 houses a tubular filtering element 20 generally concentric to the side wall 16. As shown in the present embodiment, the filtering element 20 comprises two end caps 22 and 24, a filtering means 26 suitable for removing contaminants of the fluid and a central tube 28 of perforated metal. A coil spring 30 engages the filter element 20. The upper end cap 22 includes a circular hole 31 (see Figure 4) that is interlocked or mated with the base plate unit 19. The coil spring 30 compressed between the closed end 14 and the filter element 20, pushes the filter element 20 against the base plate unit 19, thereby compressing an internal seal 32. The internal seal 32 prevents leakage between the base plate unit 19 and the filter element 20. central tube 28 provides radial support to the filter element 20. The oil or other contaminated fluid from the mounting adapter 11 flows through the base plate unit 19 towards the can 12 and along an external flow path, represented by the arrow 33, on the outer side of the filter element 20. The fluid pressure forces the oil radically inward through the filter element 20, removing contaminants from the oil. The clean oil flows upward along an internal flow path, P17G0 / 98MX represented by the arrow 35, in the upper end cap 22 and flows through the inner side of the base plate unit 19 back to the mounting adapter 11. The filter of this invention can be adapted for hydraulic circuits of high pressure, which require a high resistance in the base plate. In accordance with the foregoing, the exemplified embodiment provides a base plate 34 which is die cast aluminum. The base plate 34 is shown separated from the filter in Figure 4 and as part of the base plate unit 19 in Figures 2 and 3. Although a steel base plate could be operated in the present invention, pressure casting is preferred. an aluminum base plate, because the wide design and thickness options provide greater flexibility in the design of the filter. Manufacturing costs are also reduced by die cast aluminum. The design of the base plate of the present invention also reduces the complexity of the filter 10, thereby reducing the machining and parts needed to manufacture the filter 10. The present embodiment provides a base plate 34 that serves several functions, while maintaining the resistance. The base plate 34 includes a hub or center 36 that has cords or threads 38 that provide a connection P1700 / 98MX for the mounting adapter 11. The hub or center 36 is hollow which allows clean fluid to flow from the canister 12 to the mounting adapter along the internal flow path 35. The center 36 is interlaced or it engages with the hole 31 of the filter element 20. The center 36 includes a lip 41 radically around a middle section of the center 36 and with a larger dimension to the hole 33. The filter element 20 is pushed against the lip 41 with an internal seal 32 compressed between these. The internal seal 32 prevents leakage of contaminated fluid from the flow path 33 to the clean fluid from the flow path 35. Referring now to Figures 2, 3 and 4, the base plate 34 includes multiple ribs 42 that extend radically and which connect the center 36 to a ring 44. A plurality of ports 46 of the fluid inlet port are defined between the ribs 42 that allow the contaminated fluid to flow into the can 12 along the external flow path 33. To provide the strength and the flow area, the ribs 42 are generally thicker along the center axis 36 and a thinner radial plane created by the center 36. In the screwed filters such as those of the present invention, the Radial force or torque is applied to can 12 to complete or terminate the connection P17C0 / 98MX threaded to the mounting adapter 11. Therefore, the canister 12 transfers the torque to the base plate 34 that provides the cords or threads 38. Thus, the exemplified embodiment of the present invention also provides a cover latch 45 for transferring the torque of the can to the base plate 34. The crimping cap 45 also secures the base plate 34 to the can 12, while resisting the high pressure impulses without bursting or leaking. The base plate 34 and the crimping cap 45 form the base plate unit 19. The novel geometry of the present embodiment allows for simple stamping of a metal sheet to form the binding cap 45 with a relatively simple and inexpensive machining. The crimping cap 45 is shown as punched in Figure 4 and as assembled in the base plate unit 12 in Figures 2 and 3. Referring now to Figures 2 and 4, it is noted that the crimping cap 45 has a disk-shaped peripheral ring 47, which is generally radically flat. The peripheral ring 47 has an internal diameter having a dimension greater than that of the external diameter associated with a cylindrical wall portion 48 of the ring 44 of the base plate. The crimping cap 45 includes an outer crimping edge 50 joined in a stepped manner to the peripheral ring 47 by P1700 / 98MX a vertical wall 52 generally cylindrical. The peripheral ring 47 provides a plurality of tongues 53 extending axially opposite the vertical wall 52 to be received by the base plate 34. In accordance with the objects, objects and features of the invention, the present embodiment of the base plate 34 includes a ring 44 having several structural peculiarities that interact and intertwine with the engaging cap 45. The ring 44 includes a peripheral flange 54 extending radically outwardly from the cylindrical wall 48. The flange 54 provides a seating surface 54a in the form of a generally flat disc to receive the ring 47 in the form of a flat disk. The ring 44 also includes a plurality of slots 56 spaced apart to receive the tabs 53 with a narrow fit. The slots 56 are evenly spaced over the flange 44 near a corner 58 between the seat surface 54a of the flange and the wall 48 of the rim. In the base plate unit 19 shown in the Figures 2 and 3, the interlocking cap 45 is very tightly adjusted on the seating surface 54a with the tabs 53 tightly adjusted in the grooves 56. The tabs 53 and the grooves 56 receiving them provide for the transfer of the torque between the P1700 / 98MX binding cap 45 and the base plate 34. It will be evident that the modality provides torque transfer without welding. The present embodiment also provides torsional transfer without embedded portions of the steel sheet that convey the stress of the high fluid pressure inside the filter during operation, such as the steel sheet of the canister 12. Referring now to Figure 3, it is noted that the end portions 60 of the tabs 53 are crimped or undulated to the flange portion 54 of the collar 44 to secure the base plate 34 to the interlocking cap 45. The crimping or crimping of the tabs • 53 includes any of the tabs 53 that sufficiently secure the base plate to the interlocking cover. As best shown in Figures 1, 5 and 6, the outer edge 50 is deformed or engargola in the side wall 16 of the can 12, forming a joint or interlocking 62. The interlocking 62 holds the interlocking lid 45 to the can 12 • to secure the base plate in the can 12. The binder 62 resists the high pressure inside to prevent the filter 10 from bursting and the can 12 from moving outwardly from the base plate 34. Although the binder 62 can be by itself same liquid-tight, the present embodiment provides an interlocking seal 63 inserted between a P1700 / 98MX neck 65 of can 12 and vertical surface 52 to ensure liquid tightness. The seal 63 reduces the pressure of the fluid on the crimping 62, which further avoids the bursting of the filter 10. The neck 65 is commonly formed during the normal crimping operations of the crimping lid 34 and the side wall 16. The neck 65 preferably it has an internal diameter greater than the outer diameter of the base plate ring for transferring part of the effort of the can 12 to the base silver 34 directly without the interlocking cap 45. Next, attention will be directed to a novel groove 64. to receive an outer package 66 in the present embodiment. In accordance with the objects, objects and features of the present invention, the exemplary embodiment includes an improved approach for providing a retention groove while sufficiently holding the base plate to the can. The groove 64 is formed by locating the peripheral ring 47 of the crimping cap 45 on the seating surface 46a of the base plate 34. Shown in further detail in Figures 5 and 6, the groove 64 has an outer wall provided by the vertical wall 52, a base provided by the peripheral ring 47 and an inner wall 48b of the groove provided by the outer cylindrical wall 48 of the ring 44. When using the P1700 / 98MX cylindrical wall 48 of the base plate 34 in combination with the crimping lid 45 to provide the groove 64, the simplest stamping of the steel sheet of the crimping lid 45 provides the outer groove 64. In this way, less formation and less complex formation of the steel sheet is necessary to provide the groove 64 which improves the burst strength of the filter 10 and reduces the manufacturing costs. Another advantage of having the inner wall of the groove provided by the base plate 34 and not by the interlocking lid 45 is that the base plate can provide a mechanical retention mechanism for retaining an outer packing 66 in the groove 64. In the present In this embodiment, the retention mechanism comprises a plurality of temples 68 snapped into the ring wall 48. The temples 68 further reduce the complexity and formation of the steel sheet required for the crimping cap 45, because the crimping cap 45 does not need an additional taper to seize the outer packing 66 within the groove 64. In one Further appreciation of the present invention, it will be noted that the lugs 68 also reduce many difficulties associated with the formation of the groove 64 and with the insertion of the outer packing 66. As best seen in Figure 2, the means of P1700 / 98MX retention is provided with a plurality of lugs 68 projecting horizontally outward from an upper portion 44a of the rim 44. In the present embodiment, the lugs are evenly spaced around the upper portion 44a of the rim 44. As noted better in Figures 5 and 6, the lugs 68 do not extend toward the flange seat surface 54a but are instead recessed back to an inner wall portion of the ring groove indicated at 44b. In this particular embodiment, the lugs 68 are uniformly spaced over the grooves 56 with a cut segment indicated at 67 between each lug and groove provided so that the lugs are slidably adjustable through the grooves more easily. Because the lugs 68 do not extend to the flange 54, the outer packing can be stretched or extended over the lugs to be inserted into the groove 64. After stretching to the outer package 66 on the lugs and in the groove 64, the package will retain most of its original form having a portion indicated at 66a extending radically inward beyond the tabs 68 and towards the inner wall portion 44b of groove. Although the horizontal lugs 68 in the present embodiment improve the fixation of the outer packing in the groove, it will be understood that with the present P1700 / 98MX invention other forms of retention means could be practiced. Although the method of assembling the filter 10 of the present invention has been described above in some detail, the preferred embodiment of the unit described below reduces the steps, parts and manufacturing costs. The primary components of the assembly process are shown in Figure 4 and are described below. To form the can 12, it is embedded to zero with relatively thick gauge to provide the cylindrical side wall 16, the closed end 14 and the open end 16 having a disk-shaped 70 extending radically beyond the side wall, the filter element 20 is then inserted into the can 12. To form the base plate 34, the aluminum is pressurized to form the hub or center 36 with the lip 41 (shown in Figure 1) which is found radically about a middle section of the center and the wing 44 providing the retaining lugs 68 and the flange 54 extending radically outwardly with the grooves 56. As better illustrated in Figures 2 and 4, it can be seen that the lugs of retention 68 are pressure cast directly on and evenly spaced from the corresponding grooves P1700 / 98MX 68. This correspondence relationship between the temples 68 and the slots allows easier pressure casting of the base plate, because the corresponding molding die can comprise heart studs (not shown) extending through from the slots 56 to the tabs 68 from the bottom side of the base plate wing, the bottom side is opposite the side of the spline 64. When using core pins (not shown), the corresponding casting die (not shown) of the motherboard does not need any additional division to provide the slots and pins, which simplifies casting. The cords or threads 38 are tapped or tapped in the center 36 to provide the connection for the mounting adapter. To form the binding cap 45, the steel sheet is punched in a stepped manner to interlock or engage with the base plate 34, by providing the outer edge 50 with an end portion 72 extending radically just beyond the flange 70. , the outer edge 50 is joined by the vertical cylindrical wall 52 to the radially flat peripheral ring 47 with tabs 53 extending therefrom, the tabs are spaced apart to interlock or engage with the slots 56. Referring to Figure 2 and FIG. Figure 3, the P1700 / 98MX base plate 34 and crimping cap 45 are interlocked or engaged by locating peripheral ring 47 on flange 54. This forms groove 64 for outer packing. Tabs 53 are also received in slots 56 to provide torque transfer. To secure the base plate 34 and the interlocking cover 45, the end portions 60 of the tabs 53 deform around the collar 44 thereby securing the base plate 34 to the interlocking cover 45 that forms the base plate unit 19 with the groove 64. The lugs 68 provided by the ring 44 provide the retaining means for the groove 64. Preferably, a crimping seal 63 may be fitted around the crimping lid 45 prior to insertion into the base plate 34. base plate unit 19 is fitted in the canister where the hub or center 36 projects towards the filter element 20 and an internal seal 32 is compressed between the lip 41 and the filter element 29. While in the exemplified embodiment it is shown an internal seal 32, there are other methods and placements for external seals that prevent the transfer of fluid between the base plate and the filter. In the pre-assembled condition shown best in Figures 4, 5 and 6, the can 12 includes a shaped wing 70 P1700 / 98MX of disk extending radically outwardly and the crimping lid 45 includes a flat edge 50 extending radically outward, having an end portion 72 extending beyond the flange 70. The outer edge 50 and the flange 70 is crimped by normal nibbling operations to form a nibbler 62. In the exemplified embodiment of the present invention, the nibbling is completed by deforming the can 12 inward near the flange 70 to form a neck 65 and compress in this way to the seaming seal 63 as shown in Figure 6. The end portion 72 of the outer edge 50 curls tightly around the flange 70. The flange 70 and the outer edge 50 deform downwardly thereby forming a crimping 62 according to FIG. is shown in Figure 6. An outer package 66 is then inserted into the pre-formed groove 64 to complete the filter. Turning now to a preferred embodiment exemplified in Figure 7, a preferred improved resistance filter 100 using the novel interlocking cover and the concepts of the base plate of Figures 1-6 is exemplified. More specifically, the embodiment of Figure 7 provides a groove for external packing and for torque transfer in a similar manner as well as the embodiments shown in FIGS.

P1700 / 98MX Figures 1-6 but, with certain modalities that claim to provide a high pressure capacity. It can be understood that the filter 100 filters the fluid with much in the same general form as the previous embodiments shown in Figures 1-6. However, the filter 100 is provided with multiple preferred features that improve strength, not provided in Figures 1-6, and attention will be directed to those particularities immediately. Upon observing Figure 7 it will be appreciated that the novel features provided by the present invention can be adapted for fluid applications at higher, intermediate or lower pressure. The preferred resistance improvement features described and shown in Figure 7 provide a filter having a bursting resistance of at least 1000 p.s.i. and an impulse resistance of at least 0-300 p.s.i. for 100,000 cycles. Referring now in greater detail to the filter 100 illustrated by Figure 7, it will be noted that the base plate 120 is similar to the base plate 34 of Figure 2. The base plate 120 has a central hub 122 connected by rib 124 to a ring 126 A particularity of improvement of the resistance is that the ring 126 includes a thicker flange portion 128 that extends radically outwardly from a wall portion 129 P1700 / 98MX cylindrical ring. To provide the clamping mechanism between the canister 130 and the base plate 120, the present embodiment utilizes a crimping cap 132. The crimping 132 also includes a peripheral ring 133 generally disc-shaped, seated on a seating surface portion 128b. of flange 128 to form a groove for external packing. Similar to the previous embodiment, a plurality of tabs 134 of the interlocking cap 132 are received by the corresponding slots 135 in the flange 128. However, in the present embodiment, the tabs 134 are generally bent by more than 90 degrees. with an end portion 134a further bent around a narrower elongated bottom portion of the flange 128a. Further bending of an edge portion 134a around the lower flange portion 128a avoids the potential problem of the tabs 134 coming out of the grooves 135, which may result from the high fluid pressure from inside the filter 100, which pushes the can 130 outwardly and, likewise, to the crimped lid 132. In this way, bending the tabs 134 by more than 90 degrees allows the filter 100 to additionally support the high pressure overloads. Another particularity improves the resistance is that P1700 / 98MX tab 128 defines a continuous and cylindrical groove type channel 136 that extends vertically in flange 128. Engaging cap 134 has a continuous vertical cylindrical band 138 with a dimension slightly smaller than channel 136 and set to the channels 136. The band 136 extends from the peripheral ring 133 in a stepped and vertical fashion towards the interior of the canister 130. By providing the band 138 and the channel 136, the pressure that forces the can outwardly is released from the band. 138 towards the base plate 120 through the walls of the channel 136. Also as seen in Figure 7, the cylindrical band 138 provides the tabs 132 fitted in the slots 135 which extend the tabs 134 further towards the filter 100. To minimize the fluid pressure on the lock 140 preventing leakage and bursting, the inner packing ring seals 142 and 144 are assembled in the filter. The tab 128 has a reception taper 146 and a chamfered edge 148 for receiving and compressing the internal seals 142 and 144, respectively. The seal 142 is inserted over the crimping cap 134 and compressed against the base plate 120 to prevent fluid transfer between the crimping cap and the base plate. The seal 144 is inserted over the flange 128 and compressed against the canister 133 for P1700 / 98MX prevent fluid transfer between the canister 130 and the base plate 120. Also in Figure 7 a steel or plastic ring 150 held in place by the hook portion of the tab 134a is shown. The ring 150 helps to align and retain the seal 144 during the assembly of the filter. Another, additional feature for strength is that a neck portion 152 of the canister 130 transfers the stress directly to the base plate 120 in a manner similar to that discussed for the neck 65 of the previous embodiment. Turning now to a preferred embodiment exemplified in Figure 8, a preferred improved resistance filter 200 is exemplified using a novel interlocking cap and the concepts of the base plate of Figures 1-7 and the particularities of improving the resistance of Figure 7. When looking at Figure 8, it will be better appreciated that the circular diameter of the filter 200 can be significantly larger than the diameter of the circular ring of the gasket. external seal 202. It can be understood that the filter 200 filters the fluid with much in the same general form as the previous embodiments shown in Figures 1-7 and provides improved strength similar to the previous embodiment shown in Figure 7. In this way, attention will be directed immediately to those particularities that P1700 / 98MX differentiate the present modality from the previous modalities. Referring now more closely to the filter 200, it is noted that a base plate 206 is inserted into the filter 200 with a cartridge type seal 208 between the base plate 200 and a filter element 210. The cartridge type seal 208 eliminates the need of the lip 41 and the inner seal 32, as illustrated in Figure 1. A nipple cover 212 is interlocked or mated with the base plate 206 to provide a groove 214 for external packing and torque transfer. However, it can be seen in Figure 8 that the groove 214 of the outer package is located radically inwardly from a nibbler 216 that holds the nibbler and the base plate to a can 218. To provide the nip 214 for external packing located inwardly, a base plate ring 222 includes a flange portion 224 that extends • radically outwardly from a cylindrical ring wall 226 which also admits a radically extended outer edge portion of the interlocking cap 212 generally indicated at 228. The flange 224 includes a radically internal portion 224a to provide the groove 214 for external packing and an outer portion 224b. The outer flange portion 224b is generally P1700 / 98MX located radically outwardly and axially in the filter 200 to define a recessed and stepped segment indicated generally at 230 to accommodate the engagement 216 and the external rim 228 extending radically. The inner portion 224a includes a settling surface 240 and an outer wall 242 that are covered by the engaging cap 212 to form the groove 214 for outer packing. The outer edge 228 of the engaging cap 212 extends toward the segment 230 stepped down with a ring portion 244 that is in contact with a flange edge 246. The pressure in the filter 200 that pushes the canister 200 outward is mainly conveyed by the crimping lid 212 -in the ring 244. In order to prevent the fluid pressure in the filter 200 from reaching or reaching the crimping 216, two seals are provided. of ring 250 and 251 with housing grooves defined by the base plate at 253 and 254. The ring seal 250 is generally located outwardly radically from the outer packing 202 and compressed between the base plate 206 and the interlocking cover 212 to prevent fluid transfer between these. The ring seal 251 is compressed between the can 218 and the base plate 206 with a second neck portion 256 that aids compression to prevent P1700 / 98MX fluid transfer between base plate 206 and canister 218. Yet another alternative embodiment of a filter 300 that is very similar to the embodiment shown in Figure 8 is shown in Figure 9. The embodiment of Figure 9 it also radically provides inward a groove 302 for outer packing and a pack 304 which forms a filter crimping 306. Upon seeing Figure 9, it is noted that the outer flange wall 242 of Figure 8 has been removed and instead an annular loop 308 provides the outer wall for the outer package 304. A further difference in the present embodiment is that the outer package 304 has been molded to provide a means for securing the outer package in the groove 302. More specifically, the outer package 304 includes a lip portion 312 extending into a recessed portion 314 defined by the cylindrical wall 316 of the ring that provides the inner wall for the groove 302 for packing. By molding the package 304 in this manner and by providing a receiving or receiving means in the cylindrical wall portion 316 of the ring, the retaining lugs 68 of the first embodiment shown in FIGS. 1-6 are no longer needed. Another difference in the present embodiment compared to that of Figure 8, is an inner ring seal 318 has been displaced P17C0 / 98MX radically outwardly and compressed between the crimping cap and a chamfered edge 320 of the base plate. The inner seal 318 similarly prevents the transfer of fluid between the base plate and the interlocking cap, thereby reducing the pressure on the key 306.

P1700 / 98MX

Claims (31)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property: 1. A screwed filter comprising: a can that has a closed end, a wall lateral cylindrical and an open end, the boat houses the filter element; a base plate having a threaded hub or center and an outer peripheral ring, ribs connecting the hub or threaded center and the ring, the ring includes a flange extending radically outward and providing a seat, the flange has a plurality of spaces; and a crimping cap having an outer edge coupled with the side wall forming a nibbling, the crimping lid has a peripheral surface that is intertwined or engaging with the seat of the base plate, the lid includes a plurality of tabs dimensioned to be received by the spaces and to project through the spaces when the interlocking lid is seated on the seat, the tabs will be crimped or crimped to thereby join the interlocking lid to the base plate.
2. 2. The filter according to claim 1, which P1700 / 98MX further comprises an outer packing fitted into a groove for packing, the cylindrical groove is defined by the combination of the binding cap and the base plate having a radically internal wall provided by the ring, a base provided by the cap of engargolado and a radically external wall provided by the engargolado cover.
3. The filter according to claim 2, wherein the radically internal wall provided by the ring provides a retaining means for securing the outer package in the groove.
4. The filter according to claim 3, wherein the retaining means comprises a plurality of legs extending horizontally from an upper portion of the radically internal wall.
5. The filter according to claim 1, wherein the flange further defines a cylindrical channel with the grooves in the lower portion of the channel and the interlocking cap further comprises a ring-shaped band extending vertically from the peripheral surface, the tabs provided by the ring-shaped band, the ring-shaped band is tightly adjusted in the cylindrical channel.
6. 6. The filter according to claim 1, wherein the base plate comprises cast aluminum material at P1700 / 98MX pressure and the crimping cover comprises die-cut steel.
7. The filter according to claim 1, wherein the tabs are bent at an angle greater than 90 degrees around a lower portion of the flange, the lower portion being opposite the seat.
8. The filter according to claim 1, wherein the interlocking cap comprises a generally stepped configuration, wherein the peripheral surface comprises a disk that is generally radically flat with a ring extending vertically towards the interlocking.
9. The filter according to claim 1, wherein the filter element defines a central hole sized to receive the hub or center, the center is tightly adjusted in the central hole, the center provides a lip extending radically outward from the center. same with an internal seal compressed between the lip and the filter element.
10. The filter according to claim 1, further comprising a first internal ring seal compressed between the crimping cap and the base plate and a second inner ring seal compressed between the base plate and the can.
11. 11. The filter according to claim 1, in P1700 / 98MX where the canister comprises a neck in the side wall near the open end between the spike and the base plate, the neck has an inner diameter that is smaller than an outer diameter of the base plate.
12. 12. A method for manufacturing a screw-in filter comprising the steps of: drawing a can with an open end, a closed end and a longitudinally extending side wall between the open end and the closed end, the side wall having a wing that extends radically outwards at the open end, the boat houses a filter element; punching steel sheet to form a binding cap comprising a plurality of tabs and a disk-shaped peripheral portion connected by a vertical surface extending vertically to an outer edge; casting a base plate having a threaded hub or center with ribs connecting the hub or center to a ring, the ring provides a proximal seating surface for receiving the peripheral disk-shaped portion, the base plate defines a plurality of openings located to receive the tabs; locate the disk-shaped peripheral portion of the interlocking lid on the seating surface P1700 / 98MX next with the tabs fitted into the openings, thereby forming a groove to receive an outer package; puck or curl the tabs on the base plate to secure the base plate to the interlocking cap; and engaging or engaging the outer edge of the wing to form a hook.
13. The method according to claim 11, further including compressing a first inner ring seal between the base plate and the interlocking cap and a second internal ring seal between the can and the base plate.
14. The method according to claim 11, wherein the base plate defines a cylindrical groove-type channel and the crimping cap includes a cylindrical band that fits tightly in the channel when the peripheral disk-shaped portion is located in the channel. seat.
15. The method according to claim 11, further comprising forming a neck deformed inwardly in the side wall near the open end between the tongue and the base plate, the neck having an internal diameter that is smaller than an outer diameter of the neck. motherboard.
16. 16. On a screw-in filter that has a canister, a filter element, a base plate and a cover P1700 / 98MX * Engargolado, a method for providing a groove for receiving an outer package, comprising the steps of: forming the steel sheet in a binding cap, the binding cap includes a peripheral surface extending radically in horizontal form , a cylindrically vertical surface extending from the peripheral surface, the crimping lid provides a plurality of tongues extending below the peripheral surface; providing a base plate with a cylindrical ring, the ring provides a seat surface sized to receive the peripheral surface, the flange includes a plurality of spaced spaces for receiving the tabs; and interlocking or coupling the binding cap on the seating surface, in such a way that the tabs are projected towards the spaces, thus forming the groove that has the inner wall to the ring, the binding cap per base and the surface vertical cylindrical by external wall.
17. 17. The method for providing a retaining groove for an outer package according to claim 16, further including the step of puckering or crimping the tabs to the base plate, thereby ensuring the P1700 / 98MX hinged lid to the base plate.
18. 18. The method for providing a retaining groove for an outer package according to claim 16, further comprising the step of inserting the outer package into the groove, the ring further includes a retaining means located on the inner wall.
19. 19. A screw filter comprising: a canister having a closed end, a cylindrical side wall and an open end, the filter housing is for filtering fluid; a base plate having a threaded hub and center and an outer ring, ribs connecting the threaded hub and hub, a plurality of fluid inlet ports defined between the ribs, a crimping cap having an external portion secured to the side wall and an inner portion adapted to intertwine or engage with the rim; and a cylindrical groove for receiving an outer package defined by the combination of the base plate and the interlocking lid, the cylindrical groove has a radically internal wall provided by the ring, a base provided by the interlocking lid and a radically external wall provided by the lid of engargolado.
20. 20. The filter according to claim 19, in P1700 / 98MX where the ring also includes a retention means to ensure an external packing in the cylindrical groove.
21. The filter according to claim 19, further including a means for transferring the torque between the interlocking cap and the base plate.
22. 22. The filter according to claim 19, wherein the ring includes a seating surface extending from the inner wall, the base provided by the crimping lid is seated on the seating surface, the ring defines a plurality of slots and the inner portion of the crimping lid it comprises a plurality of tongues adapted to be received by the slots.
23. The filter according to claim 19, wherein the interlocking cap includes a substantially flat surface in radial shape connected by a cylindrical surface to an outer edge, the outer edge will be engargolado to the side wall of the can.
24. The filter according to claim 19, further comprising a first compressed ring seal between the base plate and the interlocking cap and a second compressed ring seal between the base plate and the can.
25. 25. A screw filter comprising: a canister having a closed end, a cylindrical side wall and an open end, the canister accommodates a P1700 / 98MX filter element; a base plate having a threaded hub or center and an outer peripheral ring, a plurality of ribs connecting the threaded hub or center with the ring, a plurality of fluid inlet ports defined between the ribs, the ring includes a cylindrical wall and a seat surface extending radically outwardly from the cylindrical wall, the rim defines a cylindrical groove-like channel generally along the cylindrical wall, the rim further defining a plurality of openings in the lower part of the cylindrical channel of slot type; a crimping cap comprising a disc-shaped portion seated on the seating surface, a ring-shaped wall extending vertically from the disc-shaped portion and a cylindrical band extending from the disc-shaped portion generally opposite the ring-shaped wall, the cylindrical band provides a plurality of tabs, the cylindrical band is fitted in the cylindrical groove-like channel with the tabs fitted in the openings, the tabs will be bent to sufficiently secure the lid of engargolado to the base plate, the engargolado cover also comprises an external edge that extends radically outwards from the wall with form P1700 / 98MX of ring, at least a part of the outer edge will be engaged or meshed with an end portion of the side wall to form a crimping; and an outer packing fitted in a packing groove, the packing groove is defined by the cylindrical wall, the disc-shaped portion and the ring-shaped wall.
26. 26. The screw filter according to claim 25, further comprising a first ring seal compressed between the base plate and the interlocking cap, a second ring seal compressed between the base plate and the can.
27. 27. The screw-in filter according to claim 25, wherein the outer edge includes an annular segment between the bracket and the ring-shaped wall, the ring segment engages with the base plate to transfer the force between the can and the base plate. , the packing groove will thus be placed radically inwards from the bracket at an important distance.
28. 28. The screw-in filter according to claim 27, wherein the ring defines a recessed edge radically stepped beyond the packing groove, the annular segment engages the edge.
29. 29. The screw-in filter according to P1700 / 98MX claim 25, wherein the tabs are bent at an angle greater than 90 degrees around the rim.
30. 30. The screw-in filter according to claim 25, wherein substantially the entire edge portion is engaged or engaged in the crimping, the crimping is adjacent to the ring-shaped wall of the crimping lid. The screw-in filter according to claim 25, wherein the canister comprises a neck in the side wall, the neck is located near the open end and between the spike and the rim, and the neck has an internal diameter that is smaller than an outer diameter of the hoop. P1700 / 98MX