MX2008007048A - Full and partial extension oven rack assembly. - Google Patents

Abstract

An oven rack assembly (100') is utilized within an oven (128') having a pair of ladder frames (1221) mounted to the sides of the oven interior surfaces (124'). The oven rack assembly (100') includes a pair of support stampings (112') coupled to an oven rack (102') so that the support stampings (112') will move in unison with the rack (102'). The oven rack assembly (100') also includes a slide (114') comprising an outer bracket (144') and an inner, slidable bracket (148'). The inner bracket (1481) is secured to the support stamping (112'). A connection stamping (116') includes a pair of catches (118', 120') and is secured to the outer bracket (144') of the slide (114'). The oven rack (102') is extendable between retracted and extended positions.

Description

ASSEMBLY OF COMPLETE AND PARTIAL EXTENSION OVEN GRID CROSS REFERENCE TO RELATED REQUESTS This International Application claims the priority of the Provisional Patent Application of the United States of America Serial Number 60 / 741,028 filed on November 30, 2005.

DECLARATION WITH REGARD TO I ESTIGATION OR DEVELOPMENT SPONSORED AT THE FEDERAL LEVEL Not applicable.

REFERENCE TO ANNEX OF MICROPHYPHE Not applicable.

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to oven-related products and, more particularly, oven rack assemblies that can be completely or partially extended.

Previous Technique Various types of oven rack are well known in the industry. For example, steel wire furnace grids are manufactured frequently from a steel bar, which is drawn to form the steel wire. These oven racks formed of steel wire products can be coated with various types of materials. Also, oven racks and other related items can be manufactured from products other than steel. Of course, any type of oven rack or similar product that is placed inside an oven cavity during use must be able to withstand normal cooking temperatures, which substantially exceed normal cooking temperatures. In addition, for ovens that employ self-cleaning cycles, oven racks and other related items located within the oven itself must be susceptible to being subjected to and resist temperatures that substantially exceed normal cooking temperatures. For example, steel wire oven racks can be subjected to temperatures above 900 ° F associated with self-cleaning cycles common in today's ovens. A difficulty that has existed for some years in the industry concerns the handling of oven racks, in many conventional ovens, the oven racks can be placed in the oven. several vertically arranged positions, and be adjustable between them. With the louvers positioned as desired in the different vertically adjusted locations, the oven racks are frequently "slid" over ribs or roller bearing mechanism positioned in the side portions of the oven cavity. These ribs, roller bearings or "flanges" can be components manufactured and assembled separately from the surfaces of the oven cavity and oven racks or, alternatively, can be integrated into side surfaces of the oven cavity. With respect to the furnace grid assemblies that can be extended, said grid assemblies traditionally fall within one of two types of applications. One application particularly comprises a furnace grid assembly that interacts directly with linings with ribs on the side walls of an oven interior. In a second application, the oven rack assembly interacts with a ladder structure connected to the side walls of an oven interior. As an example, Barnes, et al., Patent of the States United States No. 6,148,813 published November 21, 2000, discloses a telescopic oven rack assembly for a furnace cavity. The assembly includes an extendable grid over a primary grid structure. In turn, the grid structure is mounted for sliding movement relative to the oven cavity. With this configuration, multiple extensions are available for the grid. The grid is supported on guides transported by the grid structure, along multiple sets of rollers. A secondary grid structure can be used to slideably hold the primary grid structure, so that an additional extension can be made. Le et al, U.S. Patent No. 6,938,617 published September 6, 2005, discloses an oven rack assembly having full extension slideways. The slideways are mounted to an oven rack and the oven rack structures or wire screens provided full extension from an oven enclosure. The oven rack is mounted to side walls or the slide guides are coupled to wire grids along the side walls of the oven. This patent describes the concept of the user of ladder structures. According to the above, it is known that the prior art uses articles such as a substructure and / or fixable brackets for the sliding oven grid assembly. In these prior art configurations, the substructure can support the weight of the articles placed on the oven rack, and hold the assembly in place, with regard to stair treads or the lining with ribs. In the prior art systems employing fixable brackets, the brackets They provide a fixed connection between the oven rack and the stair racks. A disadvantage of the prior art is that the use of the substructure and / or the fixable brackets increases the number of components required for the furnace grid assembly. Also, said use requires increased space inside the furnace, thereby reducing the amount of usable space.

BRIEF DESCRIPTION OF THE DIFFERENT VIEWS OF THE DRAWING FIGURE 1 is a plan view of the prior art oven rack having a handle; FIGURE 2 is a side elevation view of the grate and oven handle of FIGURE 1; FIGURE 3 is a plan view of the second embodiment of a grid and oven handle of the prior art; FIGURE 4 is a side elevation view of the second embodiment of the grid and oven handle illustrated in FIGURE 3; FIGURE 5 is a plan view of the third embodiment of a grid and oven handle of the prior art; FIGURE 6 is a partial side elevational view of the grid and oven handle illustrated in FIGURE 5; FIGURE 7 is a partial plan view of the fourth embodiment of a prior art oven rack and handle; FIGURE 8 is a side elevational view of the grid and handle of oven, illustrated in FIGURE 7; FIGURE 9 illustrates a plan view of a fifth embodiment of a prior art oven rack with a handle; FIGURE 10 is a side view of the oven rack illustrated in FIGURE 9; FIGURE 11 is a further embodiment of a handle grille of the prior art, comprising a grid and oven handle; FIGURE 12 is a side view of the oven rack illustrated in FIGURE 11; FIGURE 13 is a perspective view of a furnace grid assembly according to the invention, showing an oven interior with ladder structures; FIGURE 14 is an exploded view of the oven rack assembly illustrated in FIGURE 13; FIGURE 15 is a perspective view of the oven rack assembly illustrated in FIGURE 14, showing the oven rack assembly in an assembled state; FIGURE 16 is a side view of the oven rack assembly according to the invention, showing the oven rack in an extended state; FIGURE 17 is a side view of the oven rack assembly shown in FIGURE 15, although it shows the grid assembly in a non-extended or retracted state; and FIGURE 18 is a cross section of the oven rack assembly shown in FIGURE 13, in accordance with invention DETAILED DESCRIPTION OF THE INVENTION The principles of the invention are described, by way of example, in a furnace grid assembly 100 'as described herein and illustrated in FIGS. 13-18. According to the invention, the furnace grid assembly can be used with linings with ribs, or otherwise employed with ladder structure applications. In the particular embodiment described herein, the oven grid assembly 100 'is shown only with the ladder structure application. In accordance with certain aspects of the invention illustrated by means of the oven grid assembly 100 ', the invention eliminates the need for a fixed substructure or brackets, thereby reducing the number of components required for assembly. In addition, the oven rack assemblies according to the invention can occupy less space inside the oven, thus allowing more usable space. Additionally, the oven rack assemblies according to the invention can provide more efficient manufacturing capacity. The invention employs two metal patterns of different designs, which provide support and act as a means of connection between the oven rack and the stairways. A stamping provides support through its sets of pieces welded to the oven rack, while the other pattern provides a connection means through the use of stamped tongue fasteners between the oven rack and the stairway tracks. The full-extension or partial-extension sliding guides can be fixed between the two patterns, in order to complete the oven rack assembly. In addition, the invention may employ oven racks having a porcelain coating, which allows the oven rack assemblies to be left in the oven during the self-cleaning cycles. Also, without departing from the main concepts of the invention, alternating coatings, such as nickel or chromium electrolytic coating, can also be used. In order to describe additional background with respect to furnace grid assemblies, the prior art embodiments of certain types of furnace grid are illustrated in FIGS. 1-12, and are described in subsequent paragraphs herein. These oven rack patterns are described in a United States of America Patent Application entitled "Handle Rack" and filed on August 20, 2004. After the description of the prior art oven racks as illustrated in FIG. FIGURES 1-12, the principles of the current invention will be described with respect to FIGS. 13-18.

More specifically, and firstly initially with respect to FIGS. 1 and 2, there is illustrated a grid with handle 100. The grid with handle 100 includes an oven grid 102. The oven grid 102 is in part a grid substantially furnace conventional, with the exception of handle 116 as described in subsequent paragraphs of this. The oven rack 102 includes an elongate rear clamp 104 which is positioned adjacent the rear of the oven cavity when the oven rack 102 is in its normal, retracted position within the oven cavity (not shown). The back clamp 104 and the other components of the oven rack 102 can be manufactured in a conventional manner from steel wire products or the like. Alternatively, other types of materials and structures may be used for the back clamp and other components of the oven rack. Interconnected or otherwise integral with the rear bracket 104 is a right bracket 106 which extends perpendicular to the back bracket 104. The right bracket 106 extends between the f and back sections of the furnace grid 102, and essentially acts as a support clamp for the other elements of the oven rack 102. Also, when the oven rack 102 is placed inside the oven cavity, the right clamp 106 will commonly rest or otherwise be releasably secured on a rib or another conventional element of the oven cavity. In correspondence with the right bracket 106, the oven rack 102 also includes a left bracket 108. The left bracket 108 is parallel to the right bracket 106 and is interconnected to or otherwise integral with the bracket rear 104. As with the right bracket 106, the left bracket 108 extends between the back and f portions of the oven rack 102. As with the right bracket 106, the left bracket 108 rests on or otherwise it is releasably secured to a rib or similar component of the oven cavity (not shown). Positioned intermediate to the right bracket 106 and the left bracket 108 is a series of parallel and longitudinally extending elongate support members 110. The support members 110 acts as the main support members of the oven rack 102 for supporting articles that are going to be heated and cooked inside the oven cavity. The trailing ends of the support members 110 are connected to the rear clamp 104 through the appropriate means, such as welding or the like. As illustrated in FIGURE 2, the right bracket 106, left bracket 108 and the support members 110 include a series of intermediate shapes 113 located near the rear portions of the brackets 106, 108 and the support members 110. The shapes intermediates 113 are connected to or otherwise integral with angled shapes 111 that are also shown in FIGURE 2. The angled shape configuration 111 helps prevent items placed on support members 110 from falling out of the oven rack 102 on the back clamp 104. The oven rack 102 also includes a central clamp 112, which extends perpendicular to the right bracket 106 and the left bracket 108. The central bracket 112 is also positioned substantially intermediately from the rear bracket 104 and the front bracket 114. The central bracket 112 provides additional support for articles placed on the bracket. the oven rack 102 for heating or cooking purposes. The central clamp 112 can be connected to the support members 110, right clamp 106 and left clamp 108 in any conventional manner. For example, welding can be used. In addition to the above, oven rack 102 includes front bracket 114. Anterior bracket 114, with reference to the illustration in FIGURE 1, includes a left portion 124 and a right portion 126. Anterior bracket 114, comprising portions left and right 124, 126, respectively, provides anterior shoring means for the oven rack 102. As illustrated in FIGURE 1, three of the support members 110 are interconnected to the left portion 124 of the front clamp 114, while that three of the support members 110 are also interconnected to the right portion 126 of the front bracket 114. The handle grille 100 comprises not only the furnace grid 102, but also the handle 116. The handle 116 is illustrated primarily in FIG. FIGURE 1. Specifically, the handle 116 includes a rear handle clamp 118 having a elongated configuration as shown in FIGURE 1. The rear handle clamp 118 extends parallel to the rear clamp 104 and the center clamp 112. As illustrated in FIGURE 1, the seven intermediate support members 110 have one end of each of them interconnected to the rear bracket 118. Interconnected to or otherwise integral with the rear bracket 118 is a pair of handle sides 122. The handle sides 122 extend substantially parallel to the support members 110, right bracket 106 and left clamp 108. Correspondingly, the handle 116 also includes a front handle clamp 120. The front handle clamp 120, as illustrated in FIGURE 1, is elongated and is positioned substantially parallel to the rear clamp 118. The sides of handle 122 are integral with or otherwise suitably interconnected to the front handle clamp 120. Also, if desired, the handle clamp erior 120 may in fact be a clamp that is integral with the anterior clamp 114 comprising the left portion 124 and the right portion 126. With the configuration of the handle grille 100 'comprising the oven grate 102 and the handle 116 as As described in the preceding paragraphs, a handle is provided for the purposes of manual manipulation in the extension and retraction of the oven rack 102 from an oven cavity (not shown). More specifically, with the oven rack 102 in a normal position within an oven cavity, the user can open a oven door (not shown). The handle 116 will be adjacent to the oven door. In order to extend the oven rack 102 out of the oven cavity, the user can manually hold the front handle clamp 120, and exert forces in a direction corresponding to the perpendicular direction from the rear clamp 104 towards the clamp of the oven. front handle 120. These forces will cause the oven rack 102 to be extended outwardly from the oven cavity. As illustrated primarily in FIGURE 2, the oven rack 102 also includes a pair of protrusions 115 which are located within the right clamp 106 and the left clamp 108. The protrusions 115 are conventional in many oven racks and comprise media to provide some securing forces when the oven rack is in its conventional position within the oven cavity. That is to say, protrusions 115 will typically "engage" with corresponding notches located in ribs or ridges on each side surface of the furnace cavity. With this type of mating relationship, it may be necessary for the user to exert partially directed upward forces to adjust the projections 115 out of the notches when the oven rack 102 extends out of the oven cavity. According to the above, the handle grid 100 not only provides the oven rack 102, but also provides a handle 116 to facilitate manual movement of the oven rack 102 between extended and retracted positions relative to the oven cavity (not shown). As mentioned previously, the handle 116 can be used to extend the oven rack 102 out of the oven cavity. Correspondingly, a user can manually clamp the front handle clamp 120 and exert forces back against the oven rack 102 in order to retract the oven rack 102 within the oven cavity. The grille with handle 100 also includes means for holding the grille with handle inside the oven cavity. Means are also provided for holding items that are to be cooked or otherwise heated within the oven cavity, and the handle is secured to the oven rack at the front portion of the rack, positioned adjacent to the oven door. Similarly, according to the above, the handle is dimensioned and configured so that an opening is formed between a front portion of the handle, and a front portion of the oven rack. According to the above, the opening is of a sufficient size so that the user can easily hold the front portion of the handle, so that the oven rack can extend from or retract into the oven cavity. For this purpose, the opening formed between the front handle clamp 120 and the back clamp 118 will be sufficient such that a user can hold the front handle clamp 120 in a convenient manner, for the purpose of extending or retracting the oven rack 102. That is, the opening between the anterior and posterior clamps 120, 118 will allow a user's hand to fit through it, in order to conveniently fasten the clamp 120. A second embodiment of a rack handle is illustrated in FIGURES 3 and 4 as a grid with handle 200. The grid with handle 200 includes an oven rack 202. The oven rack 202 is in part a substantially conventional oven rack, with the exception of the handle 216 as described in subsequent paragraphs herein, as with the oven rack 102, the oven rack 202 includes an elongate rear bracket 204 positioned adjacent the back of the oven cavity when the oven rack 202 is in its normal, retracted position within the oven cavity (not shown). Interconnected or otherwise integral with the back brace 204 is a right bracket 206 which extends perpendicular to the back bracket 204. The right bracket 206 extends between the front and back sections of the furnace grid 202, and essentially acts as a support clamp for other elements of the oven rack 202. Also, when the oven rack 202 is placed inside the oven cavity, the right clamp 206 will commonly rest or otherwise be releasably secured in a rib or another conventional element of the oven cavity. In correspondence with the right clamp 206, the oven rack 202 also includes a left clamp 208. The left clamp 208 is parallel to the right clamp 206 and is interconnected or otherwise integral with the back bracket 204. As with the right bracket 206, the left bracket 208 extends between the back and front portions of the oven rack 202. As in the case of the right bracket 206 , the left bracket 208 rests on or, otherwise, is releasably secured to a rib or similar component of the oven cavity (not shown). Positioned intermediate to the right bracket 206 and the left bracket 208 is a series of longitudinally extending, parallel elongate support members 210. The support members 210 act as the main support members of the oven rack 202 for holding articles that are going to be heated or cooked inside the oven cavity. The rear ends of the support members 210 are connected to the rear bracket 204 through suitable means, such as welding or the like, as illustrated in FIGURE 4, right clamp 206, left clamp 208, and support members 210 include a series of intermediate shapes 213 located near the rear portions of clamps 206, 208 and members 210. Intermediate shapes 213 are connected to or otherwise integral with angled shapes 211 shown also in FIGURE 4. The angled shape configuration 211 helps to prevent articles placed on support members 210 from falling out of position. the oven rack 202 on the rear clamp 204. The oven rack 202 also includes a central bracket 212, which extends perpendicular to right bracket 206 and left bracket 208. Center bracket 212 is also positioned substantially intermediate from back bracket 204 and front bracket 214. Center bracket 212 provides additional support for items placed in the oven rack 202 for heating or cooking purposes. The central clamp 212 can be connected to the support members 210, right clamp 206 and the left clamp 208 in any conventional manner. For example, welding can be used. In addition to the above, the oven rack 202 also includes the front bracket 214. The front bracket 214 provides a front bracket means for the oven rack 202. As illustrated in FIGURE 3, each of the support members 210 is interconnected at the ends thereof to the front bracket 214. The handle grille 200 not only comprises the oven rack 202, but also the handle 216. The handle 216 includes a curved front section 230 as shown mainly in FIGURE 3 The anterior section 230 extends through the entire anterior portion of the oven rack 202. The anterior section 230 includes a single element having a rounded and elongated configuration, and provides means for a user to manually grasp a portion of the grid with handle 200, in order to extend and retract the oven rack 202. Integral with or otherwise connected to the anterior section 230 is a pair of opposite side portions 232. As illustrated in FIGURE 3, and if desired, the side portions 232 can be made integral with the right bracket 106 and the left bracket 108, as well as the previous section 230. As in the case of the handle grille 100, manual forces can be exerted on the oven rack 202 through the handle 216 for the purpose of extending and retracting the oven rack 202 from an oven cavity. oven. Also, as with the oven grate 102 previously described herein and having a pair of protrusions 115, the oven grate 202 can likewise have a pair of protrusions 215 having the same functions as the protrusions 1 5. A third embodiment of a rack with a handle rack is illustrated in FIGS. 5 and 6 as a grid with handle 300. For brevity purposes, the grid elements with handle 300 corresponding to elements of the grid with handle 100 are shown through of numerical references corresponding to identically structured and identically functional functional elements referred to numerically in FIGURES 1 and 2. However, according to the third embodiment of the invention, the handle grille 300 comprises not only the oven grate 102 but also the handle 316. More specifically, the handle 316 includes a rear handle clamp 318 having an elongated configuration as illustrated in FIG. 5. 318 rear brace extends parallel the rear clamp 104 and the central clamp 112. As illustrated in FIGURE 5, the seven intermediate support members 110 have one end of each of them interconnected to the rear clamp 318. Likewise, each opposite end of the clamp 318 is preferably interconnected to one of the support members 110, again as illustrated in FIGURE 5. In addition to the above, the oven rack 102 illustrated in FIGURE 5 also includes the front bracket 314. The bracket above 314, with reference to the illustration in FIGURE 5, includes a left portion 324 and a right portion 326. The anterior bracket 314, comprising left and right portions 324, 326, respectively, provides anterior shoring means for the front grille. oven 102. As illustrated in FIGURE 5, three of the support members 110 are interconnected to the left portion 324 of the front handle clamp 314, while three of the support members 110 are also interconnected to the right portion 326 of the front handle clamp 314. handle grille 300 comprises not only the oven rack 102, but also the handle 316. The handle 316 is illustrated primarily in FIGURE 5. More specifically, the handle 316 includes the rear clamp 318 previously described herein. Also, the handle 316 includes an anterior handle clamp 320. The anterior handle clamp 320, as illustrated in FIGURE 5, is elongated and is positioned in a manner that has a curved configuration. In addition, as illustrated primarily in FIGURE 6, the anterior handle clamp 320 can be angled downwardly. If desired, the front handle clamp 320 can in fact be a clamp that is integral with the front clamp 314 comprising the left portion 324 and the right portion 326. With the configuration of the handle grid 300 comprising the grating oven 102 and handle 316 as described in the preceding paragraphs, a handle is provided for the purposes of manual handling and the extension and retraction of oven rack 102 from an oven cavity (not shown). More specifically, with the oven rack 102 in a normal position within an oven cavity, the user can open a oven door (not shown). The handle 316 will be adjacent to the oven door. In order to extend the oven rack 102 out of the oven cavity, the user can manually hold the front handle clamp 320, and exert forces in a direction corresponding to the perpendicular direction from the rear clamp 104 towards the clamp of the oven. front handle 320. These forces will cause the oven rack 102 to be extended outwardly from the oven cavity. Correspondingly, a user can manually grip the front handle clamp 320 and exert forces back against the oven grill 102 in order to retract the oven grill 102 within the oven cavity. A fourth mode of a handle is illustrated as a handle 400 in the FIGURES 7 and 8. In this configuration, the handle 400 includes a curved front handle clamp 402 having side portions 404, 406. The front handle clamp 402 has a curved configuration extending across the entire width of the handle. an interconnected oven rack (not shown). The side portions 404, 406 may be interconnected to or otherwise be integral with the front handle clamp 402 and / or left and right side clamps of the interconnected oven grate. Also, the side portions 404, 406 and the anterior handle clamp 402 can be angled downwardly as illustrated in FIGURE 8. In addition, the handle 400 can include the anterior clamp 408 positioned rearwardly of the anterior handle clamp 402. front clamp 408 may provide bracing and support means for interconnected support members of the furnace grid (not shown). A fifth embodiment of a rack with handle is illustrated as a handle grid 500 in FIGURES 9 and 10. The handle rack 500 has a configuration that is similar to the handle grille 100 illustrated and described herein with respect to FIGURES 1 and 2. More specifically, the handle grid 500 includes an oven rack 502 with a handle 516. The oven rack 502 includes an elongate rear clamp 504, positioned adjacent to the back of the oven cavity when the oven grate 502 is in its retracted and normal position. Interconnected to or otherwise integral with the rear bracket 504 is found a right clamp 506 extending perpendicular to the rear clamp 504. The right clamp 506 extends between the front and back sections of the furnace grid 502, and acts essentially as a support clamp for other elements of the grid oven 502. Also, when the oven rack 502 is placed inside the oven cavity, the right clamp 506 will commonly rest or another shape will be releasably secured to a rib or other conventional element of the oven cavity. The oven rack 502 also includes a left bracket 508, parallel to the right bracket 506 and interconnected to or otherwise integral with the rear bracket 504. As with the right bracket 506, the bracket left 508 extends between the rear and front portions of the oven rack 502. The left bracket 508 rests on or otherwise is releasably secured to a rib or similar component of the oven cavity. Positioned intermediate to the right bracket 506 and the left bracket 508 is a series of longitudinally extending parallel extending elongate support members 510. The support members 510 act as the main support members of the furnace grid 502 for holding articles that are going to be heated or cooked inside the oven cavity. The rear ends of the support members 510 are connected to the rear bracket 504 through suitable means, such as welding or the like. As illustrated in FIGURE 10, right clamp 506, left clamp 508 and supported members 510 include a series of intermediate shapes 513 located near the rear portions of clamps 506, 508 and support members 510. Intermediate shapes 513 are connected to or from another way are integral with angled shapes 511 also shown in FIGURE 10. The angled configuration of the shapes 511 helps prevent items placed on the support members 510 from falling out of the oven rack 502 on the rear bracket 504. The 502 oven rack also includes a central clamp 512, which extends perpendicular to the right bracket 506 and the left bracket 508. The central bracket 512 is also positioned intermediate the rear bracket 504 and the front bracket 514. The central bracket 512 provides additional support for articles placed in the bracket 502 oven for heating or cooking purposes. The central clamp 512 can be connected to the support members 510, right clamp 506 and left clamp 508 in any conventional manner. For example, welding can be used. The oven rack 502 also includes the previous clamp 514. The anterior clamp 514, with reference to FIGURE 9, includes a left portion 524 and a right portion 526. The anterior clamp 514 provides anterior shoring means for the oven grate 502. As illustrated in FIGURE 9, three of the support members 510 are interconnected to the left portion 524 of the front bracket 514, while three other of the support members 510 are interconnected to the right portion 526 of the front bracket 514. The handle grid 500 comprises not only the oven grate 502, but also the handle 516. The handle 516 is illustrated primarily in FIGURE 9. More specifically, the handle 516 includes a rear handle clamp 518, which has an elongated configuration as shown in FIGURE 9. The rear clamp 518 extends parallel to the rear clamp 504 and the center clamp 512. As illustrated in FIGURE 9, seven of the intermediate support members 510 have one end of each of them interconnected to the rear clamp 518. On the handle grid 100 illustrated in FIGURES 1 and 2, as described hereinabove, handle 116 included a pair of handle sides 122 that are integral with a rear handle clamp 118. In FIG. a grid with particular handle 500 illustrated in FIGS. 9 and 10, although similar to the grid with handle 100, the grid with handle 500 does not include separate elements that could be characterized as "handle sides" spaced apart from the support members 510. Instead, the sides of the opening formed in the handle 516 comprise more anterior sections of each of a pair of the support elements 510. That is, as specifically shown in FIGURE 9, two of the elements of support 510 extend from the rear clamp 504 towards the anterior clamp 514, and also form the sides of the opening of the handle 516. In this regard, the handle 516 also includes a front handle clamp 520. The anterior handle clamp 520, as illustrated in FIGURE 9, is elongated and it is positioned substantially parallel to the rear bracket 518. If desired, the front handle clamp 520 may actually be a bracket that is integral with the front bracket 114 comprising the left portion 524 and the right portion 526. The operation of the grid with handle 500 substantially corresponds to the operation of the handle grid 100 previously described herein. That is, the user can manually grip the front handle clamp 520, and exert forces in a direction corresponding to a perpendicular direction between the back clamp 504 and the front handle clamp 520. These forces will cause the oven grill 502 to be extended outward or retracted inwards in relation to the oven cavity. A further embodiment of a handle grille is illustrated as a handle grille 600 in FIGURES 11 and 12. The handle grille 600 has a configuration that is relatively similar to the handle grille 300 previously described with respect to FIGS. 5 and 6 More specifically, the grid with handle 600 includes an oven rack 602 and a handle 616. The oven rack 602 includes an elongated rear clamp 604, right clamp 606 and left clamp 608. Additionally, placed intermediate to the right clamp 606 and the left clamp 608 are parallel support members 610. Intermediate shapes 613 are connected to or otherwise integral with angled shapes 611. A central clamp 612 is also provided, positioned intermediate the rear clamp 604 and the anterior clamp 614. The anterior clamp 614 includes a portion left 624 and a right portion 626. The handle 616 includes a rear handle clamp 618 extending parallel to the rear clamp 604 and the center clamp 612. Seven of the intermediate support members 610 have one end of each of them interconnected to the back clamp 618. Also, each opposite end of the back clamp 618 is interconnected to one of the support members 610, again as illustrated in FIGURE 11. In addition to the foregoing, the oven rack 602 includes clamp anterior 614. The anterior clamp 614, with reference to FIGURE 11, includes the left portion 624 and the right portion 626. The ab anterior race 614 provides anterior shoring means for furnace grid 602. Three of supporting members 610 are interconnected to the left portion 624 of the front handle clamp 614, while the other three members 610 are interconnected to the portion right 626 of the front handle clamp 614. The handle 616 includes the back clamp 618 as previously described herein. Likewise, the handle 616 includes an anterior handle clamp 620. The anterior handle clamp 620, as illustrated in FIG.

FIGURES 11 and 12 are elongated and positioned in a manner having a curved configuration. If desired, the front handle clamp 620 may in fact be a clamp that is integral with the front clamp 314 comprising the left portion 624 and the right portion 626. In contrast to the handle grating 300 illustrated in FIGURES 5 and 6, the front handle clamp 320 of the grid with handle 300 is angled downwards. In contrast, with the handle grille 600 according to the invention, the front handle clamp 620 of the handle 616 is not angled downward and, essentially, in the same horizontal plane as the main body of the oven rack 602 The extension oven grid assembly 100 'according to the invention will now be described with respect to FIGS. 13-18. Returning to FIGURE 13, the drawing illustrates a furnace grid assembly 100 'according to the invention. The oven rack assembly is used inside a furnace 128 ', which has interior oven surfaces 124'. Assembled in any suitable manner to the sides of the inner oven surfaces 124 'is a pair of ladder structures 122'. As shown in FIGURE 13, each of the ladder structures 122 'includes a series of parallel and horizontally positioned grid position tracks 126'. Ladder structures 122 'are conventional in nature, and do not comprise any of the novel concepts of the invention. As illustrated in FIGURE 14 in an exploded format. The oven rack assembly 100 'includes an oven rack 102'. The oven rack 102 'includes a formed wire comprising a continuous external structure wire 104' for the oven grate 102 '. The external structure wire 104 'forms the front part, the sides and the rear part of the surface area of the oven grate 102'. The oven grate 102 'also includes a series of parallel and spaced transverse wires 106'. The surface area of the oven grate 102 'is also formed by a set of parallel and spaced apart wires 108'. The crossed wires 108 'may preferably be welded to the sides of the external structure 104'. Correspondingly, the transverse wires 106 'may be welded or otherwise secured to the anterior and posterior portions of the external structure 104'., and also to intersect transverse wires 106 '. If desired, a handle 110 'can be formed in the anterior portion of the oven grate 102'. With reference mainly to FIGURES 14 and 17, the oven grid assembly 100 'further includes a Z-shaped support stamp 112'. Embossing 112 'includes a horizontally positioned upper portion 130', vertically placed side portion 132 'and horizontally placed lower portion 134'. These elements are shown primarily in FIGURE 18. As shown in FIGURE 14, the support stamping 112 'may also include a front face portion 136. The support stamping 112', as illustrated primarily in FIGURE 18, is soldier preferably to the external structure 104 'of the oven grate 102'. In FIGURE 18, the lower portion 134 of the support stamp 112 'is shown welded to the structure 104'. In this way, when the oven grate 102 'is moved between retracted and extended positions, the support stamping 112' will move in unison with the grid 102 '. The support stamp 112 'provides support for the oven rack. In this way, the support stamping 112 'eliminates the need for any type of substructure, as required in prior art systems. In addition, the oven grid assembly 100 'includes a ball bearing sliding guide 114'. The ball bearing sliding guide 114 'is mainly illustrated in FIGURES 14 and 18. The ball bearing sliding guide 114', as shown mainly in FIGURE 18, includes an upper portion 138, lateral portion 140 and lower portion 142. This portion of the ball bearing slide guide 114 'forms a bracket 144 which is secured to an L-shaped connecting pattern 116' described in subsequent paragraphs hereof. The connection can be made through screws 146 or similar connection means. In addition, the ball bearing slideway 114 ', like the conventional slideways, includes a slide bracket 148. The bracket 148 includes an upper portion 150, side portion 152 and bottom portion 154. This inner bracket 148 is secured to Z-shaped support stamping 112 ', through the use of screws 156 or connection means Similar. In addition, and again with respect mainly to FIGURES 14 and 18, the oven grid assembly 100 'in accordance with the invention includes an L-shaped connecting pattern 116'. The L-shaped connecting pattern 116 'includes a vertically positioned lateral section 158' and an integral horizontally placed lower section 160 '. The lower section 160 'rotates inward toward the oven grate 102', relative to the side section 158 '. According to the invention, and as described above, the lateral section 158 'is secured to the outer bracket 144' of the ball bearing slideway 114 '. As also described above, this connection can be effected by the use of screws 146 'or similar connection means. Further, according to the invention, the L-shaped connecting pattern 116 'includes a pair of detents 118', 120 '. More specifically, the connecting pattern 116 'includes a rear tongue retainer 118' which is integral with the side section 158 and is hung downwardly therefrom. As shown in FIGURES 14 and 15, the rear tab detent 118 'includes a rearwardly extending finger 162'. The nail 162 'acts to form a slot 164'. As described in subsequent paragraphs herein, the slot 164 'is used to capture a grid position track 126' during the use of the oven grid assembly 100 '. The detents 118 ', 120' also include a detent pre-printed tab 120 '. As with the rear stamped tongue retainer 118 ', the front detent 120' hangs down from and is integral with the side section 144 'of the connecting stamping 116'. As is evident from the drawings, in particular FIGS. 13, 14 and 15, a support stamp 112 ', a bearing slide 114' and connection stamp 116 'are appropriately coupled to each side of the grid of oven 102 ', and on each side of the interior oven surfaces 124' through the grid position tracks 126 '. It is evident from the above, that the connecting pattern 116 ', through the tongue retainers 118', 120 ', provides a means of connection between the oven grate 102' and the grid position tracks 126 '. . In the operation, the pair of connection patterns 116 'can be secured to desirable grid positioning tracks 126' (at a particular desired height) More specifically, the slot 164 'of each of the rear tabs 118' is used to capture opposing grid position tracks 126 'As shown in FIGS 16 and 17, the front tab detent 120' is positioned relative to the grid position tracks 126 'to prevent any forward movement of the connecting pattern 116 It is also evident that when a user wishes to move the connecting pattern 116 'and the associated oven grid assembly 100' to a different set of tracks 126 ', the front portion of the connecting pattern 116' can be turned upwards. , so that the the anterior tongue retainer 120 'is withdrawn from the horizontal alignment with the grid position track 126'. The grid position track 126 ', at its rear portion, can be removed after capture by the slot 164 of the rear tab detent 118', thereby removing the connection pattern 116 'from the position track of particular grid 126 '. FIGURE 17 illustrates the oven grid assembly 100 'in a retracted or non-extended position. When it is desired to extend the oven rack 102 'of the oven rack assembly 100', the user can exert forces directed forward (through the handle 110 ') in the oven rack 102'. The ball bearing sliding guide 114 'will act to move forward relative to the connecting pattern 116'. With the inner bracket 148 'of the slide ball bearing 116' which is coupled to the oven rack 102 ', this part of the slide ball bearing 114' and the oven rack 102 'will move forward, in unison, to an extended position. Depending on the particular type of ball bearing sliding guide used, the oven rack 102 'may be allowed to move a fully extended position (as shown in FIGURE 16), or may be limited to forward movement only to a partially extended position (not shown). When it is desired to retract the oven rack 102 ', the user can exert forces directed rearwardly on the oven rack 102', and the oven rack 102 'and the inner shelf 144' of the guide ball bearing slide 114 'will move toward the retracted position, as illustrated in FIGURE 17. Although the furnace grid assembly 100' is shown in use with a ladder structure application in FIGS. 13-18 , it is evident that an oven grid assembly according to the invention can also be used with linings with ribs or the like. As described previously herein, assemblies oven rack according to the invention can eliminate the use of substructures and attachable brackets required by assemblies grate furnace known extension, thereby reducing the number of components required for the assembly. Furthermore, with the elimination of these and other components, the oven grid assemblies according to the invention encompass less space inside the oven, thus leaving more usable space. In addition, a more efficient manufacturing capacity is provided by means of assemblies according to the invention. With the "full structure" design, essentially a wire forms the continuous external structure 104 'of the oven grate 102'. This facilitates manufacturing. As is further evident from the description of the oven grid assembly 100 'according to the invention, the assembly 100' utilizes two different metal stamping, which provide support and act as connecting means between the oven grid and the stairway tracks. A pattern, namely the support stamping 112 ', can be welded or otherwise secured to oven rack 102 '. The other pattern, namely the connecting pattern 116 ', provides connecting means (through the use of the tongue detents 118', 120 ') between the oven grate 102' and the ladder tracks 126 '. Also, as stated above, the ball bearing slideways 114 'may be used and may be of a "full extension" or "partial extension" type. The ball bearing slideways 114 'are fixed between the support stamping 112' and the connection stamping 116 'to complete the oven rack assembly 100'. In addition, the oven rack assemblies according to the invention can use a porcelain coating, thus allowing the oven rack assemblies to be left inside the oven during the self-cleaning cycles. AdditionallyOther types of coatings can also be used, such as electrolytic coating with nickel or chromium. It will be evident to those with experience in the relevant techniques that other embodiments of furnace grid assemblies can be designed. That is, the principles of the grid assemblies are not limited to the specific embodiments described herein. Accordingly, it will be apparent to those skilled in the art that modifications and other variations of the above-described illustrative embodiments of the invention may be made without departing from the spirit and scope of the novel concepts of the invention.

Claims (2)

1. A furnace grid assembly for use in an oven cavity, said furnace cavity having means for holding said furnace grid assembly within the furnace cavity, the furnace grid assembly comprising: a furnace grid that comprises means for holding articles to be cooked or otherwise heated within the oven cavity, the oven rack being manually extensible between a retracted position and an extended position; a pair of support patterns, each pattern being fixedly secured to one of the opposite sides of said oven rack; a pair of sliding guides, each of the sliding guides comprising an external bracket and an internal sliding bracket, said internal sliding bracket which is fixedly secured to the support stamping; a pair of connection patterns, each of the connection patterns that is placed outwardly from a corresponding one of said sliding guides, and fixedly secured to said external bracket of the sliding guide; and each of the connection patterns comprising retainer means for capturing the support means of the oven rack assembly within the oven cavity.

2. A furnace grid assembly according to claim 1, characterized in that the detent means associated with a corresponding one of said connecting patterns comprises a rear tongue retainer having a rearwardly extending claw, and a front tongue retainer placed forward of the rear tongue retainer.