MXPA94006355A - Assembly of cube scraper of blades of knives and separators double - Google Patents

Abstract

The present invention relates to a scraper bucket assembly for use in a tire buffing machine comprising: two end plates, having non-planar internal surfaces; a set of tire scraper blades accommodated in a plurality of first circumferential rows, each of the first rows comprising a plurality of blades and each of the blades having an arcuate outer working edge, so that the working edges of that set of tire scraper blades thereby define a polishing surface of rim generally cylindrical, a set of spacers accommodated in a plurality of second circumferential rows, each of the second rows comprising a plurality of spacers and each of the spacers having an outer edge removed from the polishing surface, the knives being placed and the separators in first and second rows alternate between the plates in the extremes The blades and separators have elongated bodies that are not flat, each of the blade bodies and separators having opposed, symmetrical, non-planar surfaces, and including at least two planes, such that the blades of one row are easily juxtaposed with the spacers in adjacent rows, so the stability of the entire cube is increased and the positioning of the blades during the assembly is facilitated

Description

ASSEMBLY OF CUBE SCRAPER OF BLADES OF BLADES AND SEPARATORS FOLDED INVENTORS: WAYNE E. JENSEN, American national, resident: 2551 Oakwood Drive, Olympia Fields, Illinois 60461, E.U.A.

CHARLES K. STANFIELD, US citizen, resident at: 3672 Ed ards Drive, Crete, Illinois 60417, E.U.A.

APPLICANT: B & J MANUFACTURING COMPANY, American entity, domiciled at: 700 W. 193rd Street, Glenwood, Illinois 60425, E.U.A.

SUMMARY A scraper bucket assembly is described for use in a tire polishing machine. The hub assembly includes two end plates, and a set of scraper rim blades and spacers placed in alternate girth rows. The blades and spacers have elongated, not flat, bodies with the blades nested in the adjacent spacers. The resulting scraper bucket assembly allows the use of an odd or even number of scraper blades in each row, and provides several other benefits, described in the specification.

* * * * * BACKGROUND OF THE INVENTION The present invention relates to a new tire scraper bucket assembly for use in tire polishing machines. In particular, it refers to a novel tire scraper hub assembly incorporating spacers that are not flat or "bent" with scraper blades. that are not flat or "bent". The disclosures of U.S. Patent Nos. 5,033,175, 4,019,234 and 2,703,446 are incorporated herein by reference within this application. Tire polishing machines are well known in the tire renewal industry. Conventionally, a tire polishing machine includes both a structure for mounting a used tire and a scraper bucket that removes the worn tread from the used tire prior to the renewal process. The used tire is rotated while holding against the rapidly rotating scraper bucket, the outer perimeter of which is provided with a multitude of tire scraper blades. When so joined against the used tire, the scraper blades cut or remove by cutting the small rubber segments from the surface area of the worn tread of the tire. In this way, the rim is "polished" to remove the unwanted used tread and to achieve a smooth texture surface suitable for renewal. The tire scraper blades, together with the intermediate separators, are mounted on the surface of the scraper bucket between the front and rear plates of the hub. U.S. Patent Nos. 2,703,446 and 4,019, 234 disclose such scraper hub assemblies according to the conventional prior art in which the back plate of the hub has axially directed support pins for mounting the scraper blades. and the separators. The front plate is then placed over the support pins against the mounted blades and spacers and secured in place. The use of bent scraper blades of tires with flat spacers is described in U.S. Patent No. 5,033,175. This arrangement creates an interlocking cube in circumference with less potential to fail at high rotation speeds. The hub assembly for a tire polishing machine described in U.S. Patent No. 5,033,175 has proven to be satisfactory in general. However, two flat spacers separated by, and overlapped by, each scraper blade are associated in this assembly. A one-to-one correspondence and placement of the spacers and blades, together with a configuration of the spacers that facilitates the proper location of the blades, would allow the hub assembly to be assembled more quickly and easily. In addition, conventional scraper bucket assemblies (as shown, for example, in FIGURE 9), do not allow the use of an odd number of the bent blades described in U.S. Patent No. 5., 033,175 with a conventional cube, since conventional cubes only use an even number of angular surfaces or sections and each of these blades covers two angular surfaces. Finally, there is a continuing need to improve tire scraper operation and at the same time maintain or reduce energy requirements. Thus, designers recognize that a superior scraper bucket assembly would provide greater control, superior cutting, durability and polishing action, a stable, safe bucket assembly, and an economical bucket design that can assemble and maintain less experienced workers. The present invention achieves each of these goals.

SUMMARY OF THE INVENTION The present invention is directed to a novel tire scraper bucket assembly having elements whose shape and configuration results in easy assembly and use, extended life, and increased buffing performance without any significant increase in performance. energy requirements. As a result, a substantially improved tire polishing process is achieved. In accordance with the present invention, a scraper bucket assembly is provided for use in a tire polishing machine. The scraper bucket assembly includes two plates at the ends, and a set of scraper blade wheels arranged in a plurality of rows separated in circumference. Each of the blades has a body made of two flattened portions ("floors") and an arcuate outer working edge. The working edges of the scraper blades thereby define a generally cylindrical rim polishing surface. A set of spacers is also provided, and arranged in a plurality of rows in circumference. Each of the spacers has an outer edge removed from the polishing surface of the rim. The blades and separators are arranged in alternate rows between the end plates, and are formed into elongated bodies that are not flat. The blades that are not flat in each row are juxtaposed so that they can be nested with the separators that are not flat, in adjacent rows. In a preferred embodiment, the blades within the same row are positioned in end-to-end relationship immediately adjacent to one another, without any intervening space between the blades. Moreover, with respect to the cylindrical axis of the cube, each end of each blade within a given row remains on a common axial plane. In a particularly preferred embodiment, the flat portions of the blades are joined by an intermediate portion that is not planar, which may be both angular and curved. In the context of the present invention, the terms "that is not flat", "bent", and "V-shaped", are intended to describe the geometry of scraper blades and spacers once they have been assembled within the assembly of the cube, and viewed radially towards the axis of rotation of the cube from a point outside the circumference of the cube. Thus, a blade body "that is not flat" is one whose length, from end to end, does not rest in a single plane. Moreover, a "non-planar" blade body may also include a scraper blade whose "working edge" includes teeth that are angularly set or laterally offset. In addition, the term "axial" as used herein, is defined with reference to the axis of the cylindrical hub assembly (ie, in a direction along the longitudinal surface of the cylinder formed by the hub). Thus, the "axial plane" of the cube is a plane that passes through the cube that is normal to the longitudinal axis of the cube. "Symmetric", as used to describe blades and separators in the present invention, is intended to mean a type of blade or spacer configuration in which a repeating pattern is used, such that one half of the blade or spacer is an image. to the mirror of the other half. However, although the preferred embodiment of the present invention includes the use of generally symmetrical blades, with the corresponding symmetrical separators, the present invention also contemplates that the separators and the blades may not be planar and asymmetric. In a particularly preferred embodiment of the present invention, the scraping bucket has two plates at the ends with angular surfaces. A number of symmetrical blades that are not flat and an equal number of symmetrical separators that are not flat are also used, where the number of blades and spacers in each row in circumference, longitudinal, equals half the number of angular surfaces in each plate on the end. The blades and spacers are preferably V-shaped. In a further embodiment of the inventionAsymmetric blades and separators can be used, as will be discussed later. The use of non-planar and spacer blades that are not flat in the present invention thus allows the use of either an even number or an odd number of blades in each row in longitudinal circumference within the scraper hub assembly. Thus, the use of non-planar and spacer blades, in accordance with the present invention, gives the designer greater flexibility with respect to the tire scraper hub, allowing three, four, five or any odd number or pair of blades for a given application. The present invention allows the use of elongated openings in the blades and spacers to accommodate the hub bolts. An "elongated opening", as used herein, is defined as a hole whose length along the longitudinal axis of the blade body is greater than its width. With the prior art blades, circular holes were generally used to facilitate proper placement of the blades in the scraper hub assembly. However, due to the decrease in tolerance found with circular holes as opposed to elongated openings, the blades are sometimes stuck in one place. It has been found that the use of elongated openings with each of the blades of the present invention helps to avoid this undesirable locking effect.

In addition, the use of V-shaped dividers and V-shaped blades allow the assembler to properly locate the position of the blade by simply adjusting the blade on a separator that forms a V-shape. These features facilitate a quick and easy assembly of the blades in the hub assembly which is a further improvement over the prior art. This is true, to a greater extent when they are used, as holes to mount the blades, elongated openings. Other concomitant advantages arise from the unique cutter / separator configuration of the present invention. For example, since the number of angular surfaces used by the blades increases, there is a proportional increase in the number of drags executed in the occurrence of a revolution of the hub assembly. A "drag" is defined as the path of the point. effective union of the working edge for any given blade, in an axial direction, when the blade rotates about the circumference of the hub. Because the scraper blades of the present invention are bent, in one step on the rim, the effective attachment point will travel first in one axial direction and then in the other. This alternating travel allows a more aggressive drag in spite of maintaining a constant speed of rotation of the rotating scraper hub assembly. Indeed, the present invention provides at least one double drag action with respect to those achieved by the blades in conventional scraper bucket assemblies. Another concomitant advantage, of the novel blade / separator configuration of the present invention, is an increase in the number of hauls per revolution, while maintaining the same number of scraper blades and hub bolts. Thus, for example, conventional 22.86-centimeter cube assemblies of the prior art have four blades per row and eight bolts in the hub. Conventional knowledge would require eight separate knives per row and sixteen bolts to duplicate the drag action. Thus, the drag ratio with respect to the bolts for a conventional 22.86-centimeter cube is 0.5, while the drag ratio with respect to the bolts for the present invention is 1. In this way the proportion of hauls with respect to the bolts is increased by 100 percent. This increase in drag per revolution, without the corresponding increase in the number of bolts required to retain the blades in position, also facilitates the rapid assembly of a more sophisticated hub, and also lowers manufacturing costs, given the additional benefits. Again, by way of example, conventional cubes of the prior art, of 29.21 centimeters, can have five blades and ten bolts. Again, conventional teaching would suggest that, in order to reach ten planes, ten knives and twenty bolts would be required. Again, the drag ratio with respect to the bolts of the cubes of 29.21 centimeters is 0.5, while the ratio of hauls with respect to the bolts of the present invention is 1. To ensure proper operation and decrease of the vibration during the high speeds of rotation reached (approximately 2000-5000 rpm), the scraper bucket assemblies are typically balanced, in a manner similar to the rolling of the wheels. An additional benefit of the relatively small number of components required by the design of the present invention is that the balancing is carried out more easily, thus facilitating, in addition, the manufacture of the scraper bucket assembly of the present invention. Additionally, the bolt holes on the blades of the present invention are preferably located at the midpoint of the blades of the blades, as shown in FIGURE 1. This feature preferred also serves to distribute favorably the weight of the blades on the scraper bucket assembly. It has also been determined that the present invention gives the operator better control and stability during cutting while also imparting an improved sharpening action to the blade and improved polishing action of the rim. It is believed that there are three reasons responsible for the improved stability and concomitant advantages resulting from the knife / spacer arrangement of the present invention. First, the spacers of the present invention were intended to stabilize the hub assembly only by carrying a portion of the forces imparted to the blades during polishing. Since each bent blade extends axially along the hub assembly over some distance and nests between two adjacent bent spacers, the spacers overlap and hold the blades in a manner that has not been previously achieved, due to this unique assembly, the spacers were designed to more effectively hold at least a portion of the different centrifugal and impact loads imparted to the teeth during polishing. The present invention thus allows the assembly of a more stable hub. The rotation of a more stable cube, in turn, provides that a more even force of force is imparted to each tooth on each blade, prolonging the total life of the blade and its durability. Secondly, it is also thought that the symmetrical blade configuration of the present invention contributes to the overall stability stability of such a hub assembly. The rim exerts a force on the first flat portion of the blade when acting on the rim. Then, when the second flat portion of the blade is swept along the rim, the rim exerts an opposite force on that portion. It is thought that these opposing, alternating resistance forces act on the hub assembly to further stabilize the hub. Finally, because the number of hauls is increased by a given cube diameter, it is believed that the duration of the force in one direction decreases substantially compared to that of conventional buckets. This diminished duration is combined with the stabilization effects mentioned above, to also tend to stabilize the cube. As already mentioned, the non-planar scraping blades of the present invention can accommodate angularly disposed teeth. In the context of the present invention the term "angularly disposed" is intended to refer to a tooth that has been bent or formed in its base so that the leading edge and the trailing edge of the same tooth lie on the alternating sides of the center line of the tooth. body of the blade, although the midpoint of the free end of the tooth remains on the centerline of the blade body. In a preferred embodiment, each of the two flat portions of the scraper blade includes angularly disposed teeth. The teeth are inclined in a direction generally opposite the inclination of the individual flat portion, as shown in FIGURE 4. It should be noted that the corresponding symmetry between the blades and the spacers, as well as the mirror image symmetry. of each of the blades and spacers, allows the hub assembly to rotate in reverse (that is, it is equally capable of cutting and polishing in both directions), thereby retaining a feature found in scraper bucket assemblies of the prior art. Accordingly, an object of the present invention is to provide a novel scraper hub assembly for use in a tire polishing machine that allows the use of a sophisticated blade design that would otherwise require higher manufacturing costs. and more experience for the operation, but which can now be provided more economically, and which can be operated and maintained by less experienced operators. Another objective of the present invention is to employ a novel tire scraper hub assembly that combines the use of blades that are not flat, symmetrical and separators that are not flat, symmetrical, and provide a more aggressive cutting action, and an improved polishing action, compared to conventional scraper bucket assemblies that are operated at identical rotation speeds. Still another objective of this invention is to provide an improved hub assembly with an increased number of angular surfaces which allow for greater versatility in the design of the hub so as to allow the use of an even or odd number of blades in each row in longitudinal circumference. Yet another objective of the present invention is to provide a scraper bucket assembly that allows better control and greater stability while imparting an improved polishing action on the surface of the tire.

BRIEF DESCRIPTION OF THE DRAWINGS The novel features that are characteristic of the present invention are set forth in the appended claims. The invention itself, however, together with the additional objects and concomitant advantages, will be better understood with reference to the following description related to the accompanying drawings, in which: FIGURE 1 is a perspective view of a plate at the end of the hub of the present invention that includes eight angular surfaces and eight hub bolts (only four are shown), as well as a bent blade and a bent spacer, in accordance with the present invention, for mounting two of the pins and the end plate. FIGURE 2 is a side elevational view illustrating a bent scraper blade made in accordance with one embodiment of the present invention. FIGURE 3A is a bottom view of the bent rim scraper blade illustrated in FIGURE 2. FIGURE 3B is a bottom view of the bent retractor of the present invention, FIGURE 4 is an enlarged view of two bent spacers, together with two intermediate bent blades. The direction of rotation of the cube is shown by the arrow that accompanies it. FIGURE 5 is a side view of a particularly preferred embodiment of the scraper bucket assembly of the present invention, including two end plates, together with nested bent blades and spacers juxtaposed between the spacers. FIGURE 6 is a cross-sectional view of a 4-blade scraper bucket assembly of the present invention ("of 4 blades" is intended to mean that four separate bent blades are used in each row in circumference, longitudinal.) FIGURE 7 is a cross-sectional view of a 5-blade scraper bucket assembly of the present invention.

FIGURES 8A through 8D are each lower views illustrating alternative configurations for the tire scraper blades and separators contemplated by the present invention. FIGURE 9 is a perspective view of an end plate of a scraper hub of the prior art, with four planar sections, together with a conventional flat blade.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGURES 1-3, an end plate of the scraper hub of the present invention is generally designated 30, and is intended to be assembled by means of bolts 60 with a scraper blade "bent" or it is not flat, generally designated 20, and a bent separator, generally designated 10. The separator 10 has flat or "flat" portions 11 and 12, which intersect at an angular intermediate portion 13. The blade 20 has an outer working edge 25, a body having two flat ends 21 and 22, intersecting in an angular intermediate portion 23. Although the intermediate angular portion 23 may be curved, in the preferred embodiment the end portions 21 and 22 intersect at a vertex. The blade 20 and the separator 10 are also provided with elongated openings 70, with one of these openings occupying each plane. FIGURE 9 shows a conventional end plate of the hub, according to the prior art, whose outer periphery has four flat sections, and a conventional flat scraper blade. These four sections include two low points (designated "L") and two high or high points (designated "H"). In contrast, one embodiment of the present invention includes a hub end plate, shown in FIGURE 1, having eight flat sections with four high points and four low points. Preferably, the height dimension between the high and low points is greater than the width of the spacer associated with a particular cube. Alternatively, with the present invention the pulling distance of a blade is greater than the width of the spacers. In order to retain this preferred height difference, the angle formed by each flat section of the end plate with the axial plane of the hub must be increased, in comparison with the conventional scraper buckets according to the prior art. Referring now to FIGURE 5, each bent blade 20 is shown nested juxtaposed or placed face-to-face fitted between two adjacent bent spacers 10. Preferably, the adjacent blades in each row in circumference, longitudinal, are placed in an end relationship to end * that is, there is very little or no separation between the tips of the adjacent blades). As can be seen, the uppermost part or the intermediate part 40 (shown in a circle) of an adjacent lower blade 20A is approximately at the same level, or in approximately the same axial plane, as the lowermost portion 50 (shown in FIG. circle) of an upper adjacent blade 20B. This configuration allows the blades to sweep completely along the entire area of the portion of the rim to be polished. FIGURES 6 and 7 illustrate two preferred embodiments of the present invention, in which the diameters of cubes of 22.86 centimeters and 29.21 centimeters, respectively, are used. The embodiment of FIGURE 6 incorporates four bent blades (and consequently the plates of the corresponding hub ends each have eight angular surfaces, as shown in the end plate of FIGURE 1), while the FIGURE 1 7 incorporates five bent blades (and consequently the plates of the corresponding hub ends each have ten angular surfaces). While the knife and spacer embodiments of FIGURES 3A and 3B constitute the particularly preferred embodiment of the present invention, FIGURES 8A through 8D illustrate two alternative embodiments for the blades and separators of the present invention. These embodiments are not intended to be a limitation on the possible geometries of the blade and the spacer within the scope of the present invention. Additionally, the present invention projects the use of either preformed rigid blades or conformable resilient blades. Other blades and spacers are also contemplated, such as articulated blades and spacers. As manufacturers of scraper blades we explored the use of different materials, as well as the possibilities of hybrid blades (ie combinations of metallic and non-metallic materials), and hybrid fabrication techniques (ie, induction hardening only on portions of the blade) ), It is thought that other configurations can be used. It will be recognized that to the extent that the configurations of the blade and the spacer increase their complexity, the topography of the sections of the end plate adjacent to the blades must change accordingly. Other curved or non-planar shapes for the blades or spacers are contemplated and may be possible by the present invention. However, it is generally intended, although not required, that the figure of the separators should generally correspond to the shape of the blades. It is this unique combination of blades that are not flat, symmetrical, and separators that are not flat, symmetrical, along with the end plates of the hub whose internal surfaces are angled or curved to conform to the particular spatial configuration of the blades and the separators used, which constitutes the particularly preferred embodiment of the present invention. It is from this combination that the concomitant advantages of the present invention result. In the particularly preferred configuration of the blades and spacers, shown in FIGS. 3A and 3B, respectively, the angle defined by the plane of the blade of a particular blade, and the axial plane of the hub is about 8o. To the extent that the length of the plane for an identical number of knives and spacers used in each row in circumference, longitudinal increases, this same angle decreases. However, the angle is preferably chosen to provide a broad dragging action of the blades across the total surface of the tire to be renewed, as described above. Preferably, this choice of angle is combined with a scraper bucket assembly in which no more than one bolt is associated with each blade plane and each separator plane. It should be understood that one of the features of the present invention is that it allows the designer to adjust the polishing action by increasing the number of blades used in each row in longitudinal circumference. In the preferred embodiment, insofar as the number of blades increases for a given cubic circumference, the angle defined by the plane of a particular blade and the axial plane of the hub increases. Additionally, unlike the blades according to the prior art, in which the addition of each blade plane in a circumferential row requires a corresponding increase of two extra hub bolts, each blade plane in the present invention requires only one more bolt. . This particularity gives the designer additional flexibility, since a more sophisticated design can be achieved without providing increases in manufacturing and assembly costs. Those skilled in the art will appreciate that various modifications and changes can be made to the illustrated embodiments without departing from the spirit of the present invention. All these modifications and changes are intended to be covered by the appended claims.

NOVELTY OF THE INVENTION Having described the foregoing invention, it is considered as a novelty and, therefore, what is contained in the following is declared as property

Claims (15)

1. Claims 1. A scraper bucket assembly for use in a tire buffing machine comprising: two end plates; a set of rim blades accommodated in a first plurality of rows in circumference, each of the blades having an arcuate outer working edge so that the working edges of that set of rim scraper blades thereby define a surface rim polishing generally cylindrical; a set of spacers accommodated in a second plurality of rows in circumference, each of the spacers having an outer edge removed from the polishing surface; the blades and spacers are placed in alternate rows between the end plates; and the blades and spacers have elongated bodies that are not flat so that the blades of a row are juxtaposed with the spacers in the adjacent rows.
2. 2. The scraper bucket assembly, according to claim 1, further including a plurality of bolts extending between the end plates and through the openings in the blades and spacers, including the spacers and the blades at least two planes, and where each of the planes of the blades cooperates with no more than one of the bolts.
3. 3. The scraper bucket assembly, according to claim 2, characterized in that each of the blades includes at least two openings to house the bolts, each opening being located at the midpoint of the plane of the blade.
4. 4. The scraper bucket assembly, according to claim 3, characterized in that each of the blades includes at least one elongated opening for receiving one of the bolts.
5. 5. The scraper bucket assembly, according to claim 1, characterized in that each of the blades in any of the plurality of rows is placed in an end-to-end relationship with the adjacent blades in that row.
6. 6. The scraper bucket assembly, according to claim 1, characterized in that both the blades and the separators are symmetrical. The scraper bucket assembly, according to claim 1, characterized in that the driving distance of each blade is equal to or greater than the width of the separator. The scraper bucket assembly, according to claim 1, characterized in that each of the blades and spacers has an angular intermediate portion and generally flat portions of the ends extending from the intermediate portion, flat portions of the ends interact to form a vertex. The scraper bucket assembly, as claimed in claim 1, characterized in that each of the blades and spacers has a curved intermediate portion and planar portions at the ends extending from the intermediate portion. The scraper bucket assembly, according to claim 2, characterized in that the angle defined by the planes of the blades and spacers and the axial plane of the bucket is between approximately 4o and 12 °. 11. The scraper bucket assembly, according to claim 2, characterized in that the angle defined by the planes, of the blades and spacers and an axial plane of the hub is approximately 8o. The scraper bucket assembly, according to claim 1, characterized in that each of the blades includes teeth which extend in a direction generally parallel to the direction of rotation of the hub. 13. A scraper bucket assembly, for use in a tire buffing machine, including: a plurality of scraper blades and spacers disposed between a pair of plates at the ends and arranged in alternating juxtaposed circumferential rows; each of the blades and separators has an elongated body that is not flat including two elongated planes; the end plates have a plurality of inclined surfaces facing axially opposed, at least one of the plates includes a plurality of bolts that extend between the end plates and are placed in circumference around the hub assembly so that no more than one of the pins intersects each of the planes of the blades and of the separators in each of the rows in circumference; and where an odd number of blades is used in each of the rows in circumference. The scraper bucket assembly, as claimed in claim 13, characterized in that each of the scraper blades has an angular intermediate portion and the first and second generally planar portions of the ends extending from an intermediate portion, the flat portions of the ends intersect to form a vertex and each of the flat portions of the ends include teeth angularly positioned to be positioned generally parallel to the direction of rotation of the hub. 15. The rotating scraper bucket assembly for use in a tire buffing machine, which includes: a plurality of scraper blades and spacers disposed between a pair of plates at the ends and arranged in alternate juxtaposed circumferential rows, the blades and spacers being they extend from end to end within their respective rows; each of the blades and spacers has an elongated body that is not flat, including two flat floors; The scraper bucket assembly, according to claim 15, characterized in that both ends of each blade within any of the first plurality of rows are placed in a common axial plane of the hub. 17. The scraper bucket assembly, according to claim 15, characterized in that each of the blades includes teeth which extend in a direction generally parallel to the direction of rotation of the hub. 18. The scraper bucket assembly, according to claim 15, characterized in that the drag-bolt ratio is 1. 19. The scraper bucket assembly, in accordance with claim 15, characterized in that each one of the rows of blades includes at least four blades, and each of the rows of separators includes at least four separators, by means of which the row in circumference of blades executes at least eight alternate dragging during one revolution of the hub. In testimony of which I sign the present in this City of Mexico, D.F., August 19, 1994. COMPANY P1386 / 94MX '