Patent Publication Number: US-2015075513-A1

Title: Oven Range Appliance and a Cooling Assembly for the Same

Description:
FIELD OF THE INVENTION 
     The present subject matter relates generally to oven range appliances and cooling assemblies for the same. 
     BACKGROUND OF THE INVENTION 
     Oven range appliances generally include a cabinet that defines a cooking chamber for baking or broiling food items therein as well as a cooktop positioned at a top portion of the cabinet for grilling, boiling or frying food items thereon. To heat the cooking chamber, oven range appliances include heating elements, such as a bake heating element positioned at a bottom portion of the cooking chamber and/or a broil heating element positioned at a top portion of the cooking chamber. During operation of such heating elements, the cabinet and other components of the oven appliance can be heated. In particular, an outer surface of the cabinet and an outer surface of the oven appliance&#39;s door can be heated during operation of such heating elements. 
     The outer surface of the cabinet and/or the outer surface of the oven appliance&#39;s door are preferably maintained below a threshold temperature during operation of the oven appliance. Additionally, certain electronics, such as PCBs, and/or electrical components, such as a latch motor, within the oven appliance are preferably maintained below a specified temperature during operation of the oven appliance. 
     Certain oven appliances include a fan and duct system that draws or pulls air into the oven appliance for cooling oven appliances components during operation of such oven appliances. However, such fan and duct systems can be noisy when the fan is operating. Further, such fan and duct systems can add to the overall cost and complexity of their associated oven appliances. 
     Accordingly, a cooling assembly for an oven appliance that assists with maintaining a temperature of an outer surface of the oven appliance&#39;s door below a threshold temperature would be useful. In particular, a cooling assembly for an oven appliance that assists with maintaining a temperature of an outer surface of the oven appliance&#39;s door below a threshold temperature without using of a fan would be useful. Further, a cooling assembly for an oven appliance that assists with maintaining electronics or electronic components of the oven appliance below a threshold temperature would be useful. 
     BRIEF DESCRIPTION OF THE INVENTION 
     The present subject matter provides an oven range appliance and a cooling assembly for an oven range appliance. The cooling assembly includes at least one inlet and at least one outlet. The at least one inlet is configured for receiving a flow of air. The cooling assembly directs the flow of air therethrough to the at least one outlet. Due to the position and/or size of the at least one inlet and at least one outlet, the cooling assembly can draw or urge the flow of air through the cooling assembly without a fan. Additional aspects and advantages of the invention will be set forth in part in the following description, or may be apparent from the description, or may be learned through practice of the invention. 
     In a first exemplary embodiment, an oven range appliance that defines a vertical direction and a transverse direction is provided. The vertical and transverse directions are perpendicular. The oven range appliance includes a cabinet that extends between a top portion and a bottom portion along the vertical direction. The cabinet also extends between a front portion and back portion along the transverse direction. The cabinet defines a cooking chamber and an opening that permits access to the cooking chamber of the cabinet. The opening is positioned at the front portion of the cabinet. A door is mounted to the cabinet at the opening of the cabinet. The door is selectively adjustable between an open position and a closed position in order to permit selective access to the cooking chamber of the cabinet through the opening of the cabinet. A heating assembly is mounted to the cabinet at the top portion of the cabinet. The heating assembly is positioned above the cooking chamber of the cabinet along the vertical direction. A cooling assembly is positioned adjacent the top portion of the cabinet between the cooking chamber of the cabinet and the heating assembly. The cooling assembly defines at least one inlet and at least one outlet. The at least one inlet is positioned at the front portion of the cabinet and adjacent the door when the door is in the closed position. The at least one outlet is positioned at the back portion of the cabinet. The at least one outlet is positioned above the at least one inlet along the vertical direction such that a flow of air is drawn through the cooling chamber from the at least one inlet to the at least one outlet. 
     In a second exemplary embodiment, a cooling assembly for an oven appliance is provided. The cooling assembly defines a vertical direction, a lateral direction and a transverse direction. The vertical, lateral and transverse directions are mutually perpendicular. The cooling assembly includes a main body. The main body extends between a top portion and a bottom portion along the vertical direction. The main body also extends between a first side portion and a second side portion along the lateral direction. The main body further extends between a front portion and a back portion along the transverse direction. The main body defines an inlet, a flow passage and a pair of outlets. The inlet is configured for receiving a flow of air and directing the flow of air into the flow passage. The flow passage is configured for directing the flow of air to the pair of outlets. The inlet is positioned at the bottom and front portions of the main body and extends along the lateral direction between the first and second side portions of the main body. The pair of outlets is positioned at the top and back portions of the main body. 
     These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures. 
         FIG. 1  provides a front view of an oven range appliance according to an exemplary embodiment of the present subject matter. 
         FIG. 2  provides a side, section view of the exemplary oven range appliance of  FIG. 1  taken along the 2-2 line of  FIG. 1 . 
         FIG. 3  provides a perspective view of a cooling assembly for an oven appliance according to an exemplary embodiment of the present subject matter. 
         FIG. 4  provides a front, elevation view of the exemplary cooling assembly of  FIG. 3 . 
         FIG. 5  provides a top, plan view of the exemplary cooling assembly of  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION 
     Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents. 
       FIG. 1  provides a front view of an oven range appliance  10  according to an exemplary embodiment of the present subject matter.  FIG. 2  provides a side, section view of oven range appliance  10  taken along the 2-2 line of  FIG. 1  (e.g., taken in a plane that is perpendicular to a lateral direction L). It should be understood that oven range appliance  10  is provided by way of example only and is not intended to limit the present subject matter in any aspect. Thus, the present subject matter may be used with other oven range appliance configurations, e.g., that define multiple interior cavities for the receipt of food and/or having different pan or rack arrangements than what is shown in  FIG. 2 . Further, the present subject matter may be used in any other suitable oven appliance, e.g., a wall oven appliance. 
     As may be seen in  FIGS. 1 and 2 , oven range appliance  10  defines a vertical direction V, a lateral direction L and a transverse direction T. The vertical, lateral and transverse directions V, L and T are mutually perpendicular and form an orthogonal direction system. Oven range appliance  10  includes an insulated cabinet  12 . Cabinet  12  extends between a top portion  30  and a bottom portion  31 , e.g., along the vertical direction V. Cabinet  12  also extends between a first side portion  32  and a second side portion  33 , e.g., along the lateral direction L. Cabinet  12  further extends between a front portion  34  and a back portion  35 , e.g., along the transverse direction T. 
     Cabinet  12  defines an interior cooking chamber  14  and an opening  17 . Cooking chamber  14  is defined by an interior surface  15  of cabinet  12  and is configured for the receipt of one or more food items to be cooked. Opening  17  is positioned at front portion  34  of cabinet  12  and permits access to cooking chamber  14  of cabinet  12 . Oven range appliance  10  also includes a door  16  rotatably mounted to cabinet  12 , e.g., with a hinge (not shown). Door  16  is positioned at or adjacent opening  17  of cabinet  12  and is selectively adjustable between an open position (not shown) and a closed position ( FIGS. 1 and 2 ). With door  16  in the open position, a user can access cooking chamber  14  of cabinet  12  through opening  17  of cabinet  12 . Conversely, door  16  hinders or prevents access to cooking chamber  14  of cabinet  12  through opening  17  of cabinet  12  when door  16  is in the closed position. A handle  18  is mounted to door  16  and assists a user with shifting door  16  between the open and closed positions in order to access cooking chamber  14 . For example, a user can pull on handle  18  to adjust door  16  from the closed position to the open position and access cooking chamber  14 . 
     As may be seen in  FIG. 2 , oven range appliance  10  also includes a seal or gasket  20  that extends between door  16  and cabinet  12 , e.g., when door  16  is in the closed position. Gasket  20  assists with maintaining heat and cooking fumes within cooking chamber  14  when door  16  is in the closed position as shown in  FIG. 2 . Multiple parallel glass panes  22  provide for viewing the contents of cooking chamber  14  when door  16  is in the closed position and also assist with insulating cooking chamber  14 . A baking rack (not shown) may be positioned in cooking chamber  14  for the receipt of food items or utensils containing food items. The baking rack may be slidably received onto embossed ribs or sliding rails  26  such that the baking rack may be conveniently moved into and out of cooking chamber  14  when door  16  is open. 
     A bake or bottom heating element  40  is positioned in cabinet  12 , e.g., at or adjacent bottom portion  31  of cabinet  12 . Bottom heating element  40  is used to heat cooking chamber  14  for both cooking and cleaning of oven range appliance  10 . The size and heat output of bottom heating element  40  can be selected based on the e.g., the size of oven range appliance  10 . Bottom heating element  40  can be any suitable heating element. For example, bottom heating element  40  may be an electric resistance heating element, a gas burner, a microwave heating element, etc. 
     A broil or top heating element  42  is also positioned in cooking chamber  14  of cabinet  12 , e.g., at or adjacent top portion  30  of cabinet  12 . Top heating element  42  is used to heat cooking chamber  14  for both cooking/broiling and cleaning of oven range appliance  10 . Like bottom heating element  40 , the size and heat output of top heating element  42  can be selected based on the e.g., the size of oven range appliance  10 . Top heating element  42  can be any suitable heating element. For example, top heating element  42  may be an electric resistance heating element, a gas burner, a microwave heating element, etc. 
     The operation of oven range appliance  10  including top and bottom heating elements  40  and  42  is controlled by one or more processing devices (not shown) such as a microprocessor or other device that is in communication with such components. Such processing device (used herein to refer generally to single and/or multiple processing devices) is also in communication with a control panel  36  having a plurality of user inputs  37  and a temperature sensor  38  that is used to measure temperature inside cooking chamber  14 . Control panel  36  provides visual information to a user and allows a user to select various options for the operation of oven range appliance  10  via user inputs  37 . One or more of a variety of electrical, mechanical or electro-mechanical input devices including rotary dials, push buttons, toggle/rocker switches, and/or touch pads can also be used singularly or in combination as user inputs  37 . 
     Oven range appliance  10  also includes a cooktop portion  44  positioned at top portion  30  of oven range appliance  10 . Cooktop portion  44  includes a plurality of heating assemblies  46  positioned below grates  48 . Heating assemblies  46  are positioned above cooking chamber  14  of cabinet  12 , e.g., along the vertical direction V. Cooking utensils, such as pots, pans, griddles, etc., may be placed on grates  48  and heated with heating assemblies  46  during operation of oven range appliance  10 . In  FIGS. 1 and 2 , heating assemblies  46  are shown as gas burners. However, in alternative exemplary embodiments, heating assemblies  46  may be any suitable heating assembly, such as electric resistance heating elements or induction heating elements. 
     Oven range appliance  10  also includes a cooling assembly  50 . Cooling assembly  50  is positioned adjacent top portion  30  of cabinet  12 , e.g., between heating assemblies  46  and cooking chamber  14  along the vertical direction V. Cooling assembly  50  is configured for limiting or reducing heat transfer along the vertical direction V during operation of oven range appliance  10 . In particular, cooling assembly  50  is configured for directing a flow of air (shown with arrows F) therethrough in order to limit or reduce heat transfer along the vertical direction V during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 . Cooling assembly  50  is discussed in greater detail below. 
     Cooling assembly  50  defines at least one inlet  52  and at least one outlet  54 . Inlet  52  is positioned at or adjacent front portion  34  of cabinet  12 . Inlet  52  of cooling assembly  50  is also positioned adjacent or proximate door  16 , e.g., when door  16  is in the closed position. Conversely, outlet  54  of cooling assembly  50  is positioned at or adjacent back portion  35  of cabinet  12 . In particular, outlet  54  of cooling assembly  50  is positioned within a cover  58  of oven range appliance  10  at back portion  35  of cabinet  12 . Outlet  54  of cooling assembly  50  is positioned above inlet  52  of cooling assembly  50 , e.g., along the vertical direction V. 
     Flow of air F enters cooling assembly  50  at inlet  52  of cooling assembly  50  and flows through cooling assembly  50  to outlet  54  of cooling assembly  50 . Flow of air F exits cooling assembly  50  at outlet  54  of cooling assembly  50 . Flow of air F can assist with limiting heat transfer along the vertical direction V within cooling assembly  50 . For example, a lower surface  70  of cooling assembly  50  can be heated during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 . Flow of air F can be cool relative to lower surface  70  of cooling assembly  50  such that flow of air F limits or reduces heat transfer between lower surface  70  of cooling assembly  50  and an upper surface  72  of cooling assembly  50  during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 , e.g., such that upper surface  72  of cooling assembly  50  is cool relative to lower surface  70  of cooling assembly  50 . In such a manner, components of oven range appliance  10 , such as electronic or electrical components, above cooling assembly  50  can be insulated, e.g., from high temperatures of cooking chamber  14  during operation of oven range appliance  10 . 
     As may be seen in  FIG. 2 , lower surface  70  of cooling assembly  50  and upper surface  72  of cooling assembly  50  are spaced apart from each other, e.g., along the vertical direction V. Further, lower surface  70  of cooling assembly  50  and upper surface  72  of cooling assembly  50  are each sloped. In particular, lower surface  70  of cooling assembly  50  slopes upwardly along the vertical direction V from about the front portion  34  of cabinet  12  to about the back portion  35  of cabinet  12 . Similarly, upper surface  72  of cooling assembly  50  slopes upwardly along the vertical direction V from about the front portion  34  of cabinet  12  to about the back portion  35  of cabinet  12 . Lower surface  70  of cooling assembly  50  and upper surface  72  of cooling assembly  50  maybe substantially parallel to each other from about the front portion  34  of cabinet  12  to about the back portion  35  of cabinet  12 . 
     Oven range appliance  10  also includes features for limiting or reducing heat transfer within door  16 , e.g., along the transverse direction T during operation of oven range appliance  10 . As may be seen in  FIG. 2 , door  16  extends between an upper portion  65  and a lower portion  66 . Door  16  also defines an entrance  60 , a conduit or channel  62  and an exit  64 . Entrance  60  of door  16  is positioned at or adjacent lower portion  66  of door  16 . Conversely, exit  64  of door  16  is positioned at or adjacent upper portion  65  of door  16 . Channel  62  extends between entrance  60  of door  16  and exit  64  of door  16 , e.g., such that entrance  60  of door  16  and exit  64  of door  16  are in fluid communication with each other. Channel  62  permits flow of air F to flow through door  16  from entrance  60  of door  16  to exit  64  of door  16 . 
     Flow of air F through door  16  can assist with limiting or reducing heat transfer along the transverse direction T, e.g., during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 . As an example, an inner surface  67  of door  16  faces and is positioned adjacent cooking chamber  14  of cabinet  12  when door  16  is in the closed position. Conversely, an outer surface  68  of door  16  is positioned opposite inner surface  67  of door  16  and faces away from cooking chamber  14  of cabinet  12  when door  16  is in the closed position. Inner surface  67  of door  16  can be heated during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 . Flow of air F can be cool relative to inner surface  67  of door  16  such that flow of air F limits or reduces heat transfer between inner surface  67  of door  16  and outer surface  68  of door  16  during operation of bottom and/or top heating elements  40  and  42  of oven range appliance  10 , e.g., such that outer surface  68  of door  16  is cool relative to inner surface  67  of door  16 . In such a manner, outer surface  68  of door  16  can be insulated, e.g., such that a temperature of outer surface  68  of door  16  is maintained below a threshold temperature and overheating of outer surface  68  of door  16  is prevented or limited. 
     Inlet  52  of cooling assembly  50  is positioned adjacent (or at) and faces exit  64  of door  16 , e.g., such inlet  52  of cooling assembly  50  is configured for receiving flow of air F from exit  64  of door  16  during operation of oven range appliance  10 . In particular, door  16  and cabinet  12  define a gap G therebetween when door  16  is in the closed position. Gap G may be positioned at or adjacent upper portion  65  of door  16  and/or top portion  30  of cabinet  12 . Inlet  52  of cooling assembly  50  and exit  64  of door  16  are positioned at or adjacent gap G. Thus, inlet  52  of cooling assembly  50  and exit  64  of door  16  are aligned and spaced apart from each other along the transverse direction T by gap G. 
     Gasket  20  is positioned at gap G. Gasket  20  extends across gap G between door  16  and cabinet  12 , e.g., when door  16  is in the closed position. Inlet  52  of cooling assembly  50  and exit  64  of door  16  are positioned above gasket  20 , e.g., along the vertical direction V, when door  16  is in the closed position. 
     During operation of oven range appliance  10 , flow of air F enters channel  62  of door  16  at inlet  60  of door  16  and flows through channel  62  of door  16  to exit  64  of door  16 . Within door  16 , flow of air F limits or hinders heat transfer along the transverse direction T, e.g., in the manner discussed above. Flow of air F exits channel  62  of door  16  at exit  64  of door  16  and enters gap G. Within gap G, flow of air F can mix with air within gap G. From gap G, flow of air F enters cooling assembly  50  at inlet  52  of cooling assembly  50 . Flow of air F passes through cooling assembly  50  and limits or hinders heat transfer along the vertical direction V, e.g., in the manner discussed above. 
       FIG. 3  provides a perspective view of a cooling assembly  100  for an oven appliance according to an exemplary embodiment of the present subject matter.  FIG. 4  provides a front, elevation view of cooling assembly  100 .  FIG. 5  provides a top, plan view of cooling assembly  100 . Cooling assembly  100  can be used in any suitable oven appliance. For example, cooling assembly  100  may be used in oven range appliance  10  ( FIG. 1 ) as cooling assembly  50 . 
     Cooling assembly  100  includes a main body  110 . Main body  110  can be constructed of any suitable material and components. For example, main body  110  may be constructed with a plurality of panels  112  mounted to each other. Panels  112  may be sheet metal panels or any other suitable material. Main body  110  may also be constructed with a molded material. 
     Main body  110  extends between a top portion  116  and a bottom portion  114 , e.g., along the vertical direction V. Thus, top and bottom portions  116  and  114  of main body  110  are spaced apart from each other, e.g., along the vertical direction V. Main body  110  also extends between a first side portion  118  and a second side portion  120 , e.g., along the lateral direction L. Thus, first and second side portions  118  and  120  of main body  110  are spaced apart from each other, e.g., along the lateral direction L. Main body  110  further extending between a front portion  122  and a back portion  124 , e.g., along the transverse direction T. Thus, front and back portions  122  and  124  of main body  110  are spaced apart from each other, e.g., along the transverse direction T. 
     Main body  110  defines an inlet  126 , a flow passage  134  and a pair of outlets  128 . Inlet  126  of main body  110  is configured for receiving flow of air F and directing flow of air F into flow passage  134 . Flow passage  134  extends between inlet  126  of main body  110  and outlets  128  of main body  110  such that inlet  126  of main body  110  and outlets  128  of main body  110  are in fluid communication with each other via flow passage  134 . Thus, flow passage  134  is configured for directing flow of air F from inlet  126  of main body  110  to outlets  128  of main body  110 . Flow of air F can exit cooling assembly  100  at outlets  128  of main body  110 . 
     The position of inlet  126  of main body  110  relative to outlets  128  of main body  110  can assist with urging or drawing flow of air F through flow passage  134 . Similarly, the size of inlet  126  of main body  110  relative to outlets  128  of main body  110  can assist with urging or drawing flow of air F through flow passage  134 . In such a manner, flow of air F can be urged or drawn through flow passage  134  without requiring fans or other mechanical air handlers. 
     Inlet  126  of main body  110  is positioned at or adjacent bottom portion  114  and front portion  122  of main body  110 . Further, inlet  126  of main body  110  extends along the lateral direction L between about first and second side portions  118  and  120  of main body  110 . Outlets  128  of main body  110  are positioned at or adjacent top portion  116  and back portion  124  of main body  110 . Thus, inlet  126  of main body  110  is spaced apart from outlets  128  of main body  110  along the vertical direction V and the transverse direction T. 
     In particular, outlets  128  of main body  110  are spaced apart from inlet  126  of main body  110  along the vertical direction V by a height H ( FIG. 4 ). The height H may be any suitable height. For example, the height H may be selected such that heated air entering flow passage  134  at inlet  126  of main body  110  is drawn through flow passage  134  to outlets  128  of main body  110  by buoyancy of the heated air within flow passage  134 . Thus, vertical extension portions or ducts  125  of main body  110  can act as chimneys and draw or urge flow of air F through flow passage  134 . In certain exemplary embodiments, outlets  128  of main body  110  are spaced apart from inlet  126  of main body  110  by at least six inches along the vertical direction V. 
     As discussed above, the size of inlet  126  of main body  110  relative to outlets  128  of main body  110  can assist with urging or drawing flow of air F through flow passage  134 . In particular, outlets  128  of main body  110  define a cross-sectional area, e.g., in a plane that is perpendicular to the vertical direction V. Similarly, inlet  126  of main body  110  define a cross-sectional area, e.g., in a plane that is perpendicular to the transverse direction T. In certain exemplary embodiments, the cross-sectional area of outlets  128  of main body  110  is less than the cross-sectional area of inlet  126  of main body  110 . For example, the cross-sectional area of outlets  128  of main body  110  may be less than about seventy-five percent of the cross-sectional area of inlet  126  of main body  110 . 
     As may be seen in  FIG. 4 , inlet  126  of main body  110  defines a first portion  140  and a second portion  142 . First and second portions  140  and  142  of inlet  126  are spaced apart from each other, e.g., along the lateral direction L. Thus, inlet  126  of main body  110  extends along the lateral direction L between the first and second portions  140  and  142  of inlet  126 . First portion  140  of inlet  126  may be positioned at or adjacent first side portion  32  of cabinet  12  ( FIG. 1 ). Conversely, second portion  142  of inlet  126  may be positioned at or adjacent second side portion  33  of cabinet  12  ( FIG. 1 ). Thus, inlet  126  of main body  110  may extend along the lateral direction L between the first and second side portions  32  and  33  of cabinet  12 . Similarly, inlet  126  of main body  110  may extend along the lateral direction L by a about a width of door  16 . 
     As may be seen in  FIG. 3 , outlets  128  of main body  110  include a first outlet  144  and a second outlet  146 . First and second outlets  144  and  146  may be spaced apart from each other, e.g., along the lateral direction L. In particular, first outlet  144  may be positioned at or adjacent first side portion  32  of cabinet  12  ( FIG. 1 ). Conversely, second outlet  146  may be positioned at or adjacent second side portion  33  of cabinet  12  ( FIG. 1 ). In alternative exemplary embodiments, main body  110  can include any suitable number of outlets. For example, main body  110  may include one, three, four or more outlets in alternative exemplary embodiments. A vent (not shown) from cooking chamber  14  of cabinet  12  may be positioned between first and second outlets  144  and  146 . 
     As may be seen in  FIGS. 2 and 3 , main body  110  also defines at least one side inlet  150 . Side inlet  150  is positioned at first side portion  118  of main body  110  and/or second side portion  120  of main body  110 . Thus, side inlet  150  is positioned between inlet  126  of main body  110  and outlets  128  of main body  110 , e.g., along the transverse direction T. In particular, side inlet  150  is positioned downstream of inlet  126  of main body  110  and upstream of outlets  128  of main body  110 , e.g., relative to flow of air F. 
     Cabinet  12  can define passages (not shown) that extend between about door  16  and side inlet  150  of main body  110 . Thus, side inlet  150  can capture heated air expelled from door  16  and, e.g., permits such heated air to enter flow passage  134  of main body  110 . In particular, side inlets  150  can permit heated air rising between door  116  and cabinet  12  to enter fluid passage  134  of main body  110 . Side inlets  150  can assist with fluid flow around cooking chamber  14  of cabinet  12  and thereby facilitate insulation of cooking chamber  14 . 
     This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.