Patent Publication Number: US-2017354186-A1

Title: Oven assembly for personal electronic vaporizer

Description:
TECHNICAL FIELD 
     The present disclosure is directed to personal electronic vaporizers, which may be used to generate vapor from a number of substances, such as by using heating chambers or oven assemblies comprising unexposed heating elements. 
     BACKGROUND 
     Smoking devices, such as cigarette holders and pipes, are well known in the art for providing flavored vapor from a smokable substance to a user for smoking pleasure. However, such devices provide no means of controlling the heating and combustion of tobacco and other products. As a result, the devices tend to produce by-products which may impart a bitter and/or burnt taste to the mouth of a user, including combustion byproducts. 
     In an effort to overcome these issues, there have been numerous attempts to provide a device for delivering an active ingredient to a consumer through vaporization rather than combustion. For instance, many of the personal electronic vaporizers that are currently on the market heat a substance without burning it in order to release a vapor that contains the active ingredient(s) to be delivered to the user. In some instances, the vapor is created by placing the substance in contact with a metallic heating coil inside of a chamber, which may also be made of metal. Airflow is directed past the heated substance and exposed coil, often through pathways constructed of metal, resulting in the desired delivery of the vapor to the user. However, contact with metal may impart the vapor with undesirable flavor or vaporized metal particles. 
     In addition to eliminating issues with the taste of vapor, most personal electronic vaporizers do not provide means for customizing the vaping experience. For example, many personal electronic vaporizers utilize the same heating profiles regardless of type of substance to be vaporized, e.g. a solid, liquid or wax. As a result, the user may not have the option to heat the substance to an ideal temperature that will maximize vapor generation without combusting the substance. Moreover, many personal electronic vaporizers fail to provide the user with an integrated means of filtering the vapor, and/or adjusting the flow of vapor to the user in a desired amount. For these and other reasons, there remains a need for a personal electronic vaporizer that allows for the delivery of a good tasting vapor to a user, while providing the user with a customizable vaping experience. While a variety of personal electronic vaporizers have been made and used, it is believed that no one prior to the inventors has made or used an invention as described herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       While the specification concludes with claims which particularly point out and distinctly claim the invention, it is believed the present invention will be better understood from the following description of certain examples taken in conjunction with the accompanying drawing, in which like reference numerals identify the same elements and in which: 
         FIG. 1  is a perspective view of an exemplary personal electronic vaporizer; 
         FIG. 2  is an exploded view thereof; 
         FIG. 3  is a cross-sectional view thereof taken along line  3 - 3  of  FIG. 1 ; 
         FIG. 4  is a perspective view of an exemplary oven assembly, an exemplary oven mount assembly, and an exemplary battery compartment assembly; 
         FIG. 5  is a cross-sectional view of the oven assembly and oven mount assembly of  FIG. 4 ; 
         FIG. 6  is an exploded view of the oven assembly of  FIG. 4 ; 
         FIG. 7  is a perspective view of the oven assembly of  FIG. 4 ; 
         FIG. 8  is a top plan view of the oven mount assembly of  FIG. 4 ; 
         FIG. 9  is an exploded view of the oven mount assembly of  FIG. 4 ; 
         FIG. 10  is a perspective view of the oven assembly of  FIG. 4  connected with the oven mount assembly of  FIG. 4 ; 
         FIG. 11  is a cross-sectional view taken along line  11 - 11  of  FIG. 10 ; 
         FIG. 12  is a perspective view of the personal electronic vaporizer of  FIG. 1  and a mobile communication device; 
         FIG. 13  is an enlarged view of a portion of  FIG. 3 ; 
         FIG. 14  is a perspective view of an exemplary charging base of the present invention; 
         FIG. 15  is a perspective view of the lower surface of an exemplary battery compartment assembly; 
         FIG. 16  is a perspective view of another exemplary oven assembly for use with the personal electronic vaporizer of  FIG. 1 ; 
         FIG. 17  is a cross-sectional view taken along line  17 - 17  of  FIG. 16 ; 
         FIG. 18  is a top perspective view of an exemplary baffle element of the oven assembly of  FIG. 16 ; 
         FIG. 19  is a bottom perspective view of the baffle element of  FIG. 18 ; 
         FIG. 20  is a cross-sectional view of another exemplary oven assembly for use with the personal electronic vaporizer of  FIG. 1 ; 
         FIG. 21  is a cross-sectional view of another exemplary oven assembly for use with the personal electronic vaporizer of  FIG. 1 ; and 
         FIG. 22  is a cross-sectional view of another exemplary oven assembly for use with the personal electronic vaporizer of  FIG. 1 . 
     
    
    
     The drawings are not intended to be limiting in any way, and it is contemplated that various embodiments of the invention may be carried out in a variety of other ways, including those not necessarily depicted in the drawings. The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention, and together with the description serve to explain the principles of the invention; it being understood, however, that this invention is not limited to the precise arrangements shown. 
     DETAILED DESCRIPTION 
     The following description of certain examples of the invention should not be used to limit the scope of the present invention. Other examples, features, aspects, embodiments, and advantages of the invention will become apparent to those skilled in the art from the following description, which is by way of illustration, one of the best modes contemplated for carrying out the invention. As will be realized, the invention is capable of other different and obvious aspects, all without departing from the invention. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not restrictive. 
     It will be appreciated that any one or more of the teachings, expressions, versions, examples, etc. described herein may be combined with any one or more of the other teachings, expressions, versions, examples, etc. that are described herein. The following-described teachings, expressions, versions, examples, etc. should therefore not be viewed in isolation relative to each other. Various suitable ways in which the teachings herein may be combined will be readily apparent to those of ordinary skill in the art in view of the teachings herein. Such modifications and variations are intended to be included within the scope of the claims. 
     The elements or features of the various embodiments are described in detail hereinafter. Any reference to a singular characteristic or limitation of the present disclosure shall include the corresponding plural characteristics or limitations, and vice versa, unless otherwise specified or clearly implied to the contrary by the context in which the reference is made. 
     The apparatuses and methods described herein may comprise, consist of, or consist essentially of the elements and features of the disclosure described herein, as well as any additional or optional components, or features described herein or otherwise useful in relation to the aforementioned apparatuses and methods. 
     The term “personal electronic vaporizer,” which is used interchangeably herein with “PEV,” means a hand held electronic device which vaporizes one or more substances for consumption including, but not limited to, via inhalation, by a consumer. Non-limiting examples of substances include solids, liquids, gels and waxes. The PEV may take any shape to allow for the internal components as described below to be integrated therein. 
     I. Personal Electronic Vaporizer 
     Referring now to  FIGS. 1, 2, and 3 , an embodiment of a personal electronic vaporizer is shown and described as PEV  1 . PEV  1  extends generally from a top end  3  to a bottom end  5  and includes a mouthpiece assembly  7 , a top shell assembly  9 , a container assembly  11 , one or more of an oven assembly  13 , an oven mount assembly  15 , and a battery compartment assembly  17 . Each component or elements of a component may be formed or coated using a medical grade material, such as medical grade glass, medical grade stainless steel, or anodized aluminum. 
     Mouthpiece assembly  7  defines a mouthpiece channel  29  surrounded by a material such as glass, ceramics, polycarbonate, or silicone. Mouthpiece assembly  7  includes a shaft  34  extending outwardly away from and continuing the channel  29  therethrough. Shaft  34  transitions into a shoulder  47  and a boss  49 , with channel  29  extending therethrough. As shown in  FIG. 3 , channel  29  is a non-linear channel with multiple loop-backs and 180 degree turns as channel  29  extends from mouth area  33  to boss  49  and facilitates fluid communication between mouth area  33  and boss  49 . The fluid communication may encompass a fluid such as air. As such, the turning and looping back of channel  29  creates a bubbler area  30  whereby a user may add water or other substances into channel  29  to fill bubbler area  30  and accordingly force any air or fluid passing through PEV  1  to pass through the substance in bubbler area  30 . For example, a user may fill bubbler area  30  with an amount of tap water  32 . As the user then draws fluid through PEV  1 , the fluid passes through the tap water  32  in bubbler area  30  whereby heavier particles and water-soluble molecules are trapped in the tap water  32 , thus preventing these particles from entering the user&#39;s airways. The user may turn the mouthpiece assembly  7  upside down to empty the tap water  32  from the bubbler area  30 . 
     Top shell assembly  9  extends from a top end  39  to a bottom end  41  and includes a display screen  19  and a button  21 . Display screen  19  may be configured to be situated behind a mirrored or otherwise one way transparent outer surface  23  of top shell assembly  9 , whereby the display screen  19  projects through the outer surface  23  when energized and illuminated, and does not project through the outer surface  23  when the display is not illuminated. Display screen  19  may be a liquid crystal display, a light emitting diode (LED) display, or any other mechanism for displaying visual information. Top shell assembly  9  further includes an annular lip  43  and a corresponding annular shoulder  44  proximate second end  41  for use in securing top shell assembly  9  to battery compartment assembly  17 . 
     Top shell assembly  9  further includes a ring  31  proximate the top end  39 . Ring  31  defines a primary intake opening  35  and a secondary intake opening  37  and is rotatable in the direction of Arrow A and Arrow B. Primary intake opening  35  may be rotated with respect to a corresponding underlying opening to adjust the size of the overall fluid pathway leading into the PEV  1 . Similarly, secondary air intake opening  37  may be rotated with respect to a corresponding underlying opening to fine tune the size of the overall fluid pathway leading into the PEV  1 . By rotating ring  31 , the user can adjust the size of the openings for passing fluid into PEV  1  and ultimately affect the flow rate of fluid into the PEV  1 . In another embodiment of PEV  1 , ring  31  may be embodied by a ring  31 A, disposed proximate the second end  41  of top shell assembly  9 . Ring  31 A operates similarly to ring  31 , with a primary intake opening  35 A and one or more secondary intake openings  37 A. Ring  31 A may be manually rotated by the user to open the intake openings in accordance with the preference of the user. 
     Container assembly  11  includes a hollow body  51  and a corresponding lid  53  for enclosing the hollow body  51 . The container assembly  11  is shaped to define a recess  55  which generally corresponds to another portion of the PEV  1  such that the recess  55  mates with the other portion to be snuggly disposed thereon. 
     Battery compartment assembly  17  includes a battery  26  disposed proximate an outer wall  25 . Outer wall  25  defines a series of dimples  27  or holes for aesthetic purposes. Alternatively outer wall  25  may define vent holes (not shown), configured to expel excess heat generated through use of the battery  26  or may utilize vent holes to allow sound to exit the PEV  1 . Battery compartment assembly  17  further includes an annular lip  57  and a corresponding annular shoulder  59  sized and oriented to mate with annular lip  43  and annular shoulder  44  of top shell assembly  9  to selectively fittingly engage top shell assembly  9  with battery compartment assembly  17 . Battery compartment assembly  17  further includes a pair of electrodes  61  configured to electronically couple with the positive and negative poles of the battery  26 . The pair of electrodes  61  are shown in  FIGS. 2 and 3  as electrode  61 A and electrode  61 B. The battery compartment assembly  17  may also include a latch  63  sized and oriented to mate with a corresponding latch (not shown) proximate the second end  41  of the top shell assembly  9  and slidingly engaged therewith to selectively hold top shell assembly  9  to battery compartment assembly  17  and ensure proper orientation. 
     Battery  26  is preferably a rechargeable battery, such as those that are currently used in electronic vaporizers (e.g., nickel cadmium batteries, lithium ion batteries, lithium ion polymer batteries, etc.). The battery may be recharged via an electrical wall outlet, a car charger, charging base, and/or a USB on a suitable power source (e.g., a computerized device). 
     As shown in  FIGS. 3-7 , oven assembly  13  is sized to be removably received in a heater receptacle  95 . As such, oven assembly  13  includes a generally cylindrical profile extending from a top end  67  to a bottom end  69 . A pair of electrodes  71  extend outwardly at bottom end  69 , with one electrode having a positive pole, shown as electrode  71 A, and one electrode having a negative pole, shown as electrode  71 B. Electrodes  71  transfer electric power from oven mount assembly  15  to a heating plate  73  configured to heat up and increase in temperature in accordance with the amount of electric power supplied from oven mount assembly  15 . Heating plate  73  may include an integrated heating coil (not shown) disposed therein or a thermal film (not shown), a transparent film conductor (not shown), or any other mechanism for converting electrical power from battery  26  into heat. 
     A preheating area  74  ( FIG. 3 ) may be disposed under and around heating plate  73 . Preheating area is configured to be placed in the path of the air traveling through PEV  1  to the oven assembly  13 , such as the air is preheated before traveling to oven assembly  13 . The preheating area  74  increases the speed with which the PEV  1  may heat the air surrounding the medium in oven assembly  13 , which in turn shortens the time the user has to wait to receive the vapors from the properly heated medium in oven assembly  13 . The preheating area  74  may be configured to create a convection type of environment, whereby the air is circulated past heating elements to continuously warm and heat the air before the air is drawn into the oven assembly  13 . 
     As shown in  FIG. 5  oven assembly  13  further includes a porous ceramic tray  75  in an abutting relationship with heating plate  73  such that ceramic tray  75  absorb the heat generated by heating plate  73  and changes temperature generally in accordance with heating plate  73 . Oven assembly  13  further includes a plenum ring  77  proximate ceramic tray  75  and defining an aperture  78  therethrough. Oven assembly  13  further includes an oven base  79  having a plurality of air holes  81  defined thereby for allowing the air to travel through in the direction of Arrows D. Oven base  79  is topped by a cylindrical shroud  83 . As shown in  FIG. 5 , plenum ring  77  is configured to allow fluid to pass in through aperture  78  in the direction of Arrow C and thereafter pass through air holes  81  of oven base  79  in the direction of Arrows D. Oven assembly  13  may further include a porous glass filter or frit element (not shown) oriented such that the air may travel through the frit relatively slowly, reducing the flow rate of the air as the air travels through a pathway of PEV  1 , to allow more time for the air to heat up and retain heat. The frit in turn acts to increase a dwell time for heat transfer along the pathway. 
     In some version of oven assembly  13 , the frit or glass filter may be disposed within ceramic tray  75 , within aperture  78  and/or air holes  81 , or layered between or adjacent to any of the various elements within oven assembly  13 . For example, a frit layer may be disposed between plenum ring  77  and oven base  79  to slow the air passing through oven assembly  13  and allow a longer exposure to heating plate  73 . 
     Oven assembly  13  may include zero, one, or two identification prongs. In the illustrated embodiment, oven assembly  13  includes a first identification prong  85  and a second identification prong  87 . Identification prongs signal the intended heating profile of the particular oven assembly  13 . As will be described in greater detail below, the identified heating profile is used by other components of PEV  1  to heat the oven assembly in accordance with specified criteria. In one embodiment of the present invention, the heating profile includes a goal temperature, wherein the PEV  1  heats the oven assembly  13  to the goal temperature specified by the heating profile. Inasmuch as both the first identification prong  85  and the second identification prong  87  may be present or absent in a particular oven assembly  13 , the PEV  1  may use this presence or absence of these two components, or any combination thereof, as a signifier of a particular profile associated with the particular oven assembly  13 . For example, the PEV  1  may be configured such that the presence of first identification prong  85  coupled with the absence of the second identification prong  87  indicates to the PEV  1  that a first heating profile is associated with the underlying oven assembly. If the first heating profile includes a goal temperature or goal temperature range of 345 to 355 degrees Fahrenheit, the PEV  1  will act to heat the medium in the oven assembly  13  to between 345 and 355 degrees. The temperature of the medium is determined through one or more sensors configured to sense or derive the temperature of the medium. 
     As discussed in greater detail below, PEV  1  may include temperature sensors. For example, infrared sensors, thermocouple style sensors, and/or thermistor style sensors for precise temperature sensing of the temperature. One major deficiency of in the prior art relates to temperature control. PEV&#39;s in the prior art simply measure a mechanical element of the PEV, such as the heating coil or a particular plate or surface, and thereafter base the actuation or termination of the heating on those measured temperatures. However, the temperature of a particular PEV element and the temperature of the underlying medium may vary wildly. Thus, the PEV may actuate or terminate heating in an inefficient manner, with respect to the requirements of the medium for proper and efficient vapor generation. PEV  1  includes multiple sensors and logic circuitry configured to determine or derive the temperature of the medium itself and actuates or terminates the heating based on whether the temperature of the medium is within the goal range. This results in a greater experience for the user through the increased efficiency of heating and vaporizing the medium. 
     Different smokable substances or mediums may be best suited for different heating profiles. For example, a solid substance may be best suited for a first heating profile, while a liquid substance may be best suited for a second heating profile. Still further, a wax substance may require a third heating profile. As such, the user may select a particular oven assembly  13  based on intended substance and the heating profile associated with the selected oven assembly  13 . For example, if a user wishes to vaporize solid tobacco in PEV  1 , the user will select the oven assembly  13  configured for use with solid substances and load the selected oven assembly  13  into PEV  1 . Thereafter, based on the arrangement of the first identification prong  85  and the second identification prong  87 , the PEV  1  will recognize the particular heating profile associated with the selected oven assembly  13  and will heat the oven assembly  13  in the manner best suited for a solid sub stance. 
     Correlating the presence or absence of identification prongs is a non-limiting example of a mechanism for signaling different heating profiles in the present invention. Oven assemblies  13  may include alternative mechanisms for signaling a heating profile. For example, in certain configurations of PEV  1 , a radio frequency identification (RFID) tags or other similar identification methods may be used or incorporated into the signaling of different heating profiles. 
     As shown in  FIGS. 5, 8, and 9 , oven mount assembly  15  includes three main components: a cap  89 , a circuit board assembly  91 , and a backing plate  93 . Cap  89  defines multiple recesses and apertures for accessing elements on circuit board assembly  91  through cap  89 . Cap  89  includes a heater receptacle  95  that defines a channel  97  therein for receiving a selected oven assembly  13 . Cap  89  includes a pair of electrode through holes  99  configured to allow a corresponding electrode  71  of an oven assembly  13  to pass through cap  89  and into elements of the circuit board assembly  91  ( FIG. 11 ). Similarly, cap  89  includes a pair of identification prong through holes  101  configured to allow first identification prong  85  and second identification prong  87  to pass through cap  89  and into elements of the circuit board assembly  91 . As such, cap  89  is primarily configured to receive a selected oven assembly  13  into heater receptacle  95  and align the electrodes  61  and identification prongs  85  and  87  with underlying elements of circuit board assembly  91 . 
     As shown in  FIG. 9 , circuit board assembly  91  includes various electronic components, logic, and support structure to enable battery  26  to interface with oven assembly  13  as desired. As such, circuit board assembly  91  includes a microprocessor  103  coupled with a circuit board  105 . A pair of receiving terminals  107  are disposed on the circuit board  105  proximate a bracket  106 , configured to receive electrodes  61  extending from the battery  26  and electronically couple the battery  26  to the circuit board  105  to energize the circuit board assembly  91 . Similarly, a pair of receiving terminals  109  are disposed on the circuit board  105 , configured to receive electrodes  71  extending from oven assembly  13  and electronically couple the oven assembly  13  with the circuit board assembly  91 . Circuit board assembly  91  further includes an identification terminal  111  and an identification terminal  113 , whereby identification terminal  111  is configured to receive first identification prong  85  therein and identification terminal  113  is configured to receive second identification prong  87  therein. As such, circuit board assembly  91  may poll identification terminal  111  and identification terminal  113  to determine whether the particular selected oven assembly  13  includes one or both of the first identification prong  85  and the second identification prong  87 , or whether the selected oven assembly  13  does not include either prong. As discussed above, the circuit board assembly  91  can derive the particular heating profile for the selected oven assembly  13  based on the presence or absence of one or both of the first identification prong  85  and the second identification prong  87 . 
     Circuit board assembly  91  further includes a temperature sensor  115  extending from circuit board  105  and oriented to be proximate the oven assembly  13  when an oven assembly  13  is disposed in heater receptacle  95 . Temperature sensor  115  is illustrative of one embodiment of the present invention, as circuit board assembly  91  may further include multiple infrared sensors (not shown), thermocouple style sensors (not shown), and thermistors style sensors (not shown) for precise sensing or derivation of the temperature of the medium for use in control of the heat directed at the smoking substance or medium. Circuit board assembly  91  further includes a jumper socket  116  configured to receive corresponding electrical wiring (not shown) from display screen  19  and button  21  and electronically and logically couple display screen  19 , button  21 , and microprocessor  103  such that microprocessor  103  may actuate display screen  19  in accordance with the logic stored therein and in accordance with actuation of the button  21  by the user. While circuit board assembly  91  is shown as a feature of oven mount assembly  15 , in other embodiments of the present invention, circuit board assembly  91  or a similar element thereof, may be disposed in other assemblies or components of PEV  1 . For example, in an embodiment of the invention, a circuit board assembly may be disposed in the top shell assembly  9 . Alternatively, PEV  1  may include a master controller and slave controller disposed anywhere in the PEV  1  and in communication through various wiring and logic circuitry. 
     Backing plate  93  is sized and configured to brace circuit board assembly  91  and hold circuit board assembly  91  firmly between cap  89  and backing plate  93 . As such, backing plate  93  includes a plurality of fastener receivers  117  for receiving a corresponding series of fasteners  119  therein, whereby fasteners  119  are configured to pin and hold the circuit board assembly  91  to backing plate  93 . Backing plate  93  defines a pair of apertures  121  aligned and sized to allow electrodes  61  from battery  26  to pass through backing plate  93  and into receiving terminals  107  of circuit board assembly  91 . 
     As shown in  FIG. 12 , PEV  1  may include a wireless module  121  electronically coupled with microprocessor  103  through corresponding wiring (not shown). Wireless module  121  is configured to wirelessly electronically couple with a corresponding wireless communication module  122  of a mobile communication device  123 . The mobile communication device  122  includes logic and circuitry to connect wireless communication module  122  with an interface application  125  having a graphical user interface (not shown). The interface application  125  may be configured to respond to input from the user and transmit these user commands from mobile communication device  122  to PEV  1 . In turn, PEV  1  is configured to receive these user commands via the wireless module  121  and provide these commands to microprocessor  103 . Microprocessor  103  interprets these user commands and actuates the various components and elements of PEV  1  accordingly. Microprocessor  103  is further configured to collect various metrics, data points, and related information and provide this data to mobile communication device  123  for display to the user through interface application  125 . 
     PEV  1  may further include a speaker  127  electronically coupled with microprocessor  103  through corresponding wiring (not shown). Speaker  127  is configured to receive information and data from microprocessor  103  and transmit sound waves in accordance with the received information. For example, microprocessor  103  may provide musical data to speaker  127 , whereby speaker  127  transmits this musical data as sound waves to the user through PEV  1 . Speaker  127  may ultimately be controlled by a user through any combination of display screen  19 , button  21 , and interface application  125  on mobile communication device  123 . While speaker  127  is depicted in  FIG. 12  as disposed in the top portion of PEV  1 , in other versions of PEV  1 , speaker  127  may be disposed in the bottom portion of PEV  1 . 
     PEV  1  may further include a pathway  129  surrounded entirely by a material  131  and extending from inside the oven assembly  13  out through the mouthpiece channel  29  of the mouthpiece assembly  7 . As shown in  FIG. 13  and starting inside the oven assembly  13 , tray  75 , ring  77 , oven base  79 , and cylindrical shroud  83  are all formed of the material  131 . Further, shaft  34  defining bubbler area  30  and mouth area  33  are also formed of the material  131 . As such, as the medium is heated in oven assembly  13 , the medium itself and the vapors emitted therefrom is entirely surrounded by the material  131  as the vapors travel along pathway  129 . In an embodiment of the invention, the material is inert, chemically stable, and thermodynamically stable. This ensures the vapors are untainted by the material as the vapors travel along pathway  129 . Further, by heating oven assembly  13  through heating plate  73 , situated outside of pathway  129 , the vapors are untainted by electrical components of PEV  1 , such as heating coils or other undesirable elements that may alter the vapors or the medium in undesirable ways. In an embodiment of the invention, the material  131  is a relatively pure glass material, a ceramic glass material, a relatively pure ceramic material, or a polycarbonate material. The term “relatively pure” signifies the material may include some common slight impurities or colorants. 
     In operation, a user may grasp PEV  1  and rotate top shell assembly  9  and battery compartment assembly  17  axially to disengage latch  63  and release the two components. This release exposes container assembly  11  to the user, which may be detached from around heater receptacle  95  of oven mount assembly  15 . The user thereafter opens lid  53  of compartment assembly  17  to expose the medium stored in hollow body  51 . Depending on the medium, the user thereafter selects the appropriate oven assembly  13 . For example, if the medium is a solid, the user may select a corresponding oven assembly  13  configured to properly and efficiently heat a solid medium using a particular heating profile associated with the selected oven assembly  13 . Alternatively, if the medium is a liquid or a wax, another more appropriate oven assembly  13  may be selected. 
     After the oven assembly  13  is selected, the user inserts the medium into the cylindrical shroud such that the medium rests on oven base  79 . As illustrated in  FIG. 4 , the user thereafter inserts the selected oven assembly  13  into channel  97  of heater receptacle  95  of oven mount assembly  15  in the direction of Arrow D. The oven assembly  13  is inserted into heater receptacle  95  in a particular orientation, whereby each electrode  71 A and  71 B is passed through electrode through holes  99  of cap  89  and is received in corresponding receiving terminals  109  of circuit board assembly  91 . Similarly, if the selected oven assembly  13  includes a first identification prong  85 , the first identification prong  85  is passed through one of the identification prong through holes  101  and is received in corresponding receiving terminal  111  of circuit board assembly  91 . If the selected oven assembly  13  includes second identification prong  87 , the second identification prong  87  is passed through one of the identification prong through holes  101  and is received in corresponding receiving terminal  113  of circuit board assembly  91 . 
     Once the selected oven assembly  13  is loaded with the medium and inserted into the oven mount assembly  15 , the user then aligns top shell assembly  9  with battery compartment assembly  17  and axially twists the two elements to engage latch  63  to firmly hold top shell assembly  9  to battery compartment assembly  17 . If desired, the user may then remove the mouthpiece assembly  7  and fill bubbler area  30  with liquid, such as water, for filtering the vapors of the medium. 
     Once the mouthpiece assembly  7  is coupled with the top shell assembly  9  and the selected oven assembly  13  is disposed in the oven mount assembly  15 , the PEV  1  is actuated to heat the medium in the oven assembly  13 . The heating may be actuated by the user through manual manipulation of button  21  or through manipulation of interface application  125  on mobile communication device  123  and feedback may be provided to the user through display screen  19 . 
     In response to a heating request by the user, the microprocessor  103  polls identification terminal  111  and identification terminal  113  to determine the particular configuration, through resistance or a combination of the presence or absence of the first identification prong  85  and the second identification prong  87  of the selected oven assembly  13 . In one example, the presence or absence of the identification prongs correlates to a two digit binary number such as 00, 01, 10, or 11 stored in a lookup table in the microprocessor  103 . The microprocessor  103  thereafter retrieves the particular heating profile associated with the configuration of the identification prongs and initiates heating of the heating plate  73  in accordance with the retrieved heating profile. The heating of heating plate  73  is performed by energizing heating plate  73  through a current supplied by battery  26  and tailored to the heating profile. 
     Next, the medium is heated in the oven assembly  13  through heating of the heating plate  73 . The user thereafter orally engages mouth area  33  of mouthpiece assembly  7  and applies negative pressure on the mouthpiece assembly  7  to draw air through PEV  1 . The negative pressure at mouthpiece assembly  7  draws air from primary intake opening  35  and secondary intake openings  37  through oven assembly  13  and around the heated medium. The vapors from the heated medium are drawn up through pathway  129 , through bubbler area  30 , and into mouthpiece channel  29 , where the vapors are inhaled or otherwise utilized by the user. The user may selectively rotate ring  31  on top shell assembly  9  to expose or cover primary intake opening  35  and/or secondary intake openings  37  and customize the pressure and air flow through the PEV  1 . The vapors from the heated medium travel along pathway  129 , which is entirely surrounded by material  131  configured to not taint or chemically disrupt the vapors. 
     The entire experience may be enhanced by actuating PEV  1  to play music or other audible sounds through speaker  127 . 
     As shown in  FIGS. 14 and 15 , a charging base  135  may be provided to recharge battery  26 . Charging base  135  includes a power cord (not shown) configured to draw power from a wall outlet or other similar power source. Charging base  135  further includes a recess  137 , wherein a positive charging pole  139  and a negative charging pole  141  reside. As shown on  FIG. 15 , the bottom surface of battery compartment assembly  17  may include a charging area  143  complementarily shaped to mate with recess  137 . Charging area  143  includes a positive charging pole  147  configured to mate with positive charging pole  139  and a negative charging pole  145  configured to mate with negative charging pole  141 . The mating of the poles completes a charging circuit between battery  26  and charging base  135  and acts to recharge battery  26 . Charging base  135  may be configured to provide over five amps of charging to the battery  26 . In one embodiment of the charging base  135 , the battery  26  is charged using a twenty amp circuit to allow for quick charging of battery  26 , which may be less than ten minutes. While charging base  135  is shown and described herein, any other mechanism for recharging battery  26  is contemplated, such as a USB style power cord or a standard power cord plugged directly into the body of battery compartment assembly  17 . 
     II. Wax Oven Assembly 
     Many wax vaporizing devices on the market use a bare wire heated to high temperatures to vaporizer wax. Bare wire wax vaporizers rapidly deplete the wax due to the high heat. One of the drawbacks to this approach is the typically short intervals between applications of the wax. Users are required to frequently stop vaping and replenish the wax supply. Further, the materials within the wax being vaporized do not require this relatively high heat. High heat provides a less desirable vaporizing experience for the user and can result in combustion. 
       FIGS. 16-19  depict an exemplary oven assembly for use with a wax substance, referred to hereinafter as a wax oven  201 . Wax oven  201  generally includes a base  202 , an outer wall  215  extending from base  202 , a chamber  204  defined by outer wall  215  and base  202 , a heating element  213  disposed in chamber  204 , a baffle element  217  disposed in chamber  204 , a wax chamber  225  defined by baffle element  217 , and at least one convection hole  221  defined by baffle element  217 . 
     More particularly, wax oven  201  generally extends from a top end  203  to a bottom end  205  and includes a heating assembly  207  and a wax pocket assembly  209 . Wax oven  201  is configured to heat a wax substance through convection and free of a bare wire construction to minimize combustion of the material to be vaporized. 
     Heating assembly  207  includes various components directed to providing convection oven style heating to the contents of wax oven  201  and therefore provide a different taste profile when compared to bare wire wax vaporizers. Heating assembly  207  includes identification prongs  211  for electronically coupling with PEV  1  and receiving power therethrough. Identification prongs  211  may be configured to provide identification information to PEV  1  and may be associated with a particular heating profile, whereby PEV  1  recognizes wax oven  201  through the electrical resistance, number of identification prongs  211 , orientation, placement of identification prongs  211 , or any other feature that may provide identification information regarding wax oven  201 . Once a heating profile is identified, PEV  1  heats wax oven  201  in accordance with the heating profile associated with wax oven  201 . 
     Heating assembly  207  also includes heating element  213  electrically coupled with battery  26  of PEV  1  through identification prongs  211 . Heating element  213  is configured to provide convection style heating to the wax pocket assembly  209  and any wax substances disposed therein. 
     Wax pocket assembly  209  includes a cylindrical shroud as an outer layer, referred to hereinafter as outer wall  215 . Outer wall  215  surrounds baffle element  217  ( FIGS. 18 and 19 ) and facilitates directing air heated by heating element  213  through and around baffle element  217 . Baffle element  217  defines a lower opening  219  for receiving heated air. Lower opening  219  is in fluid communication with a plurality of convection holes  221  defined by baffle element  217  and disposed around the perimeter thereof. 
     A chamber element  223  extends into lower opening  219  in a generally cylindrical shape and defines wax chamber  225  therein. Wax chamber  225  extends from a top opening  227  to a bottom surface  229 . In some embodiments, the depth of wax chamber  225  is between one and thirteen millimeters. Top opening  227  is surrounded by an upper surface  231 . Upper surface  231  may be in the form of a bowl or depression or may be angled towards top opening  227  to direct the wax substance towards wax chamber  225 . To load upper surface  231  with a wax substance, the user may scrape or otherwise deposit the wax substance directly from the container of wax substance. Further, a tooth  233  extends upwardly from upper surface  231  and is configured to allow a user to scrape the wax substance out of a container and onto upper surface  231  for loading wax oven  201  with the wax substance. 
     In some embodiments, baffle element  217  is formed from a ceramic material with beneficial heat conducting characteristics. Baffle element  217  is configured and disposed within outer wall  215  to facilitate the flow of air through lower opening  219 , through convection holes  221 , around chamber element  223  and wax chamber  225 , and out top end  203  of wax oven  201 . 
     As shown in  FIG. 17 , a wax substance  235  may be scraped by tooth  233  to deposit wax substance  235  onto upper surface  231 . As heated air is introduced around wax substance  235 , the viscosity of wax substance  235  is decreased and wax substance  235  begins to travel in the direction of Arrows AA, BB, and finally CC, whereby wax substance  235  pools and sits on bottom surface  229  of wax chamber  225 . Wax chamber  225  is generally vertically oriented and provides a deep chamber for holding wax substance  235  therein, even while the user is handling PEV  1  and holding PEV  1  at various angles. Wax chamber  225  thus reduces spilling of wax substance  235  inside wax oven  201  while PEV  1  is handled at various positions. 
     As the user draws an amount of air through PEV  1 , the air is heated by heating element  213  and directed around chamber element  223  in a convection style heating method. Wax substance  235  is heated, vaporized, and entrained in the stream of air flowing past wax oven  201  and to the user. 
     A method of using wax oven  201  is provided and discussed herein. The method starts with a user scraping wax substance  235  out of a container and onto upper surface  231  directly from the container of wax substance  235  or via the use of tooth  233  to scrape wax substance  235  out of the container. In some embodiments of wax oven  201 , the loading of wax substance  235  onto upper surface  231  may be accomplished while wax oven  201  resides in PEV  1 . In other embodiments, the user removes wax oven  201  to load wax substance  235  and thereafter places wax oven  201  back into PEV  1  and thereafter actuates PEV  1 . 
     Battery  26  of PEV  1  provides power through identification prongs  11  in accordance with the heating profile of wax oven  201 , and as indicated by one or more characteristics of identification prongs  211 , such as electrical resistance, number of prongs  211 , or placement of identification prongs  211 . For example, wax oven  201  may include three prongs, which identifies to PEV  1  that wax oven  201  should be heated to 300 degrees. Another wax oven (not shown) may include two prongs  211 , which signifies to PEV  1  that the wax oven should be heated to 200 degrees. The other wax oven may be formed from a different material with different heat requirements, or may be intended to heat a different style of substance, such as a liquid, rather than wax substance  235 . 
     Once heating element  213  is actuated, heated air flows through lower opening  219 , around chamber element  223 , and through convection holes  221 . This heated air also travels across upper surface  231  and tooth  233 , heating wax substance  235  and decreasing the viscosity thereof. Once wax substance  235  is less viscous, wax substance  235  travels from upper surface  231  down into wax chamber  225 . Once inside wax chamber  225 , wax substance  235  is heated through the convection air traveling around chamber element  223 . Inasmuch as wax chamber  225  is a deep, generally vertical chamber, a user may physically tip or angle PEV  1  without spilling wax substance  235  out of wax chamber  225 . 
     Due to the convection style heating of wax substance  235  and the absence of a bare wire heater, a more efficient heating of wax substance  235  is achieved due to the lower temperatures required to vaporize the desired wax substances  235  when compared to direct combustion methods via more precise heat transfer. Thus, wax oven  201  minimizes loss to the surrounding oven environment and extends the vaping time between subsequent wax additions. 
     III. Convection Oven Assembly 
       FIG. 20  depicts an exemplary oven assembly  301  suitable for incorporation with PEV  1 . Oven assembly  301  generally includes an oven holder  304 , an outer wall  303  extending from the oven holder  304 , a chamber  302  defined by outer wall  303  and oven holder  304 , a heating disk  311  disposed in chamber  302 ; an oven cup  309  disposed in chamber  302 , a chamber  310  defined by oven cup  309 , and at least one filter opening  319  defined by oven cup  309 . 
     More particularly, as shown in  FIG. 20 , oven assembly  301  comprises outer wall  303  extending from oven holder  304  and surrounding oven cup  309 . Outer wall  303  is spaced from oven cup  309  to form an air channel  305  between outer wall  303  and oven cup  309 . Outer wall  303  can be made from stainless steel, glass, ceramic, or any other suitable medical grade material. In some versions of oven assembly  301  outer wall  303  is not heated. In other version of oven assembly  301 , outer wall  303  is heated. Outer wall  303  extends upwardly away from oven holder  304  to encircle or surround oven cup  309  in a chimney-like manner. Oven holder  304  may be formed of a polymer material that is selected to withstand the temperatures involved in PEV  1 . For example, some versions of oven holder  304  may be formed using a polyetheretherketone (PEEK) type of material. 
     A bottom area  306  of oven cup  309  defines a plurality of air openings  307  into the interior of oven cup  309 . Openings  307  allow heated air in air channel  305  to enter the oven cup  309 . As shown in  FIG. 20 , openings  307  may be positioned on a bottom of oven cup  309  and/or on a side of oven cup  309  as needed or desired. The number and position of air openings  307  may vary depending on the use of PEV  1 . Oven cup  309  may be made from glass, ceramic, stainless steel, or any other suitable medical grade material. While PEV  1  is shown and described having certain features, oven cup  309  may be sized and shaped to fit into other vaporizer configurations such as a pen-style vaporizer, a large vaporizer, or a single use device. Accordingly, oven cup  309  may be provided having any size and shape relative to the underlying vaporizer structure. 
     Heating disk  311  is positioned within chamber  302  and between outer wall  303 , bottom area  306 , and oven holder  304 . Heating disk  311  may be metal, such as stainless steel or copper, glass, ceramic, or any other suitable medical grade material. In some versions of oven assembly  301 , heating disk  311  is a thin heating film. In other versions, heating disk  311  is a heater encased in a glass, ceramic, or other suitable medical grade material. Heating disk  311  is electronically coupled with a power source, such as battery  26  of PEV  1  through identification prongs  316 , which extend through oven holder  304  to electronically couple with heating disk  311 . 
     Air may be drawn through or over a frit  313 , positioned between heating disk  311  and bottom area  306  of oven cup  309 . Frit  313  is porous and may be made from glass, ceramic, or any other suitable high temperature membrane. As shown in  FIG. 20 , an air plenum  315  is provided between frit  313  and bottom area  306  of oven cup  309  to accumulate heated air before the air enters a plurality of chamber openings  308  defined by a lower chamber wall  312  and into chamber  310  defined by oven cup  309 . It should be noted that air plenum  315  is merely optional. In some versions of oven assembly  301 , air plenum  315  is omitted or combined with chamber  310 . In some versions of oven assembly  310 , a temperature sensor may be included in chamber  310 , air plenum  315 , or directed at frit  313  to control the air temperature. 
     In some version of oven assembly  301 , chamber  310  is capped by a seal  317 . Seal  317  may be formed using a silicon material or any other material suitable for the temperatures and environment. Seal  317  defines filter opening  319  with a frit filter  321  disposed therein to allow the heated air from chamber  310  to pass therethrough. A tube  323  is disposed on seal  317 , opposite chamber  310 , and generally aligned with frit filter  321  to all the heated air to pass therethrough and on to mouthpiece assembly  7 . Some versions of tube  323  may be formed as a bubbler for holding a liquid  325  therein and providing an additional filtering component to the heated air and vaporized material. 
     In operation, the air within air channel  305  is heated by the heat generated by heating disk  311  and may also be heated by outer wall  303  in those versions of oven assembly  301  having a heated outer wall  303 . The heated air is then circulated through air plenum  315  and chamber  310 . The heated and circulated air thereby heats the walls of oven cup  309  to more evenly and efficiently heat the substance to be vaporized within oven cup  309 . For instance, the heated and circulated air within air channel  305  provides a more even temperature distribution along the walls of oven cup  309 . This may be prevent burning and/or uneven heating of the substance to be vaporized within oven cup  309 . Frit  313  may further allow the air circulating through air channel  305  to be heated more efficiently as the air passes through frit  313  between heating disk  311  and air openings  307 . Air plenum  315  may allow the heated air to accumulate before entering chamber  310  of oven cup  309 . This heated air then passes through chamber openings  308  of oven cup  309  to heat the substance to be vaporized in chamber  310 . The heated air and vaporized material thereafter exits chamber  310  through filter opening  319  and frit filter  321  to enter tube  323 . Tube  323  may further filter the heated air and vaporized substance through a bubbler configuration or another mechanism. Thereafter, the vaporized substance in the heated air produced by oven assembly  301  travels to mouthpiece assembly  7  and ultimately to the user. 
       FIG. 21  depicts an exemplary oven assembly  401  suitable for incorporation with PEV  1 . Oven assembly  401  is similar to oven assembly  301  in many respects, with like elements having like numbering. However, oven assembly  401  includes a second heating disk  403  disposed between frit  313  and air plenum  315 . Second heating disk  403  defines an opening  405  to allow heated air to pass through second heating disk  403  and into air plenum  315  to further and more evenly heat the air passing into chamber  310 . Heated air travels through air channel  305  and into openings  307  in the direction of Arrow FF. Thereafter, the heated air enters frit  303  and passed through opening  405  in the direction of Arrow GG and into chamber  310  in the direction of Arrow HH. 
     While opening  405  is depicted as a single opening, some versions of oven assembly  401  may include multiple openings  405 . Some versions of second heating disk  403  may be metal, such as stainless steel or copper, glass, ceramic, or any other suitable medical grade material. Second heating disk  403  may comprise a thin heating film and/or second heating disk  403  may be encased in glass, ceramic, or any other suitable medical grade material. Second heating disk  403  is electronically coupled with a power source, such as a battery  26  of PEV  1  to provide power to heat second heating disk  403 . 
       FIG. 22  depicts an exemplary oven assembly  501  suitable for incorporation with PEV  1 . Oven assembly  501  is similar to oven assembly  301  in many respects, with like elements having like numbering. However, oven assembly  501  does not include a heating disk element such as heating disk  311  or second heating disk  403 . In some versions of oven assembly  501 , outer wall  303  is heated and thus acts to heat the air traveling through air channel  305  and through openings  307 . Rather than heating disk  311  and air plenum  315 , oven assembly  501  is free of a heating disk and provides air plenum  503  disposed below a frit  505 . Frit  505  is immediately adjacent lower chamber wall  312  and thus acts as a filter or first material for heating air to enter chamber  310 . As shown in  FIG. 22 , heated air travels through air channel  305  in the direction of Arrow II and into frit  505 . The air passes through frit  505  and into chamber openings  308  to enter into chamber  310 , as shown by Arrow JJ. A temperature sensor  507  may be disposed in air plenum  503  to determine the temperature of the heated air immediately prior to entering frit  505 . Temperature sensor  314  may be omitted in some version of oven assembly  501  or may be used in conjunction with temperature sensor  507  to provide additional information to microprocessor  103 . 
     IV. Exemplary Combinations 
     The following examples relate to various non-exhaustive ways in which the teachings herein may be combined or applied. It should be understood that the following examples are not intended to restrict the coverage of any claims that may be presented at any time in this application or in subsequent filings of this application. No disclaimer is intended. The following examples are being provided for nothing more than merely illustrative purposes. It is contemplated that the various teachings herein may be arranged and applied in numerous other ways. It is also contemplated that some variations may omit certain features referred to in the below examples. Therefore, none of the aspects or features referred to below should be deemed critical unless otherwise explicitly indicated as such at a later date by the inventors or by a successor in interest to the inventors. If any claims are presented in this application or in subsequent filings related to this application that include additional features beyond those referred to below, those additional features shall not be presumed to have been added for any reason relating to patentability. 
     Example 1 
     An oven assembly configured for use with a personal electronic vaporizer, the oven assembly comprising a base, an outer wall extending from the base, a first chamber defined by the outer wall and the base, an oven element disposed in the first chamber, a second chamber defined by the oven element, and at least one opening defined by the oven element. 
     Example 2 
     The oven assembly of any of the previous or subsequent Examples, further comprising a heating element disposed in the first chamber. 
     Example 3 
     The oven assembly of any of the previous or subsequent Examples, wherein the heating element is disposed between the base and the oven element. 
     Example 4 
     The oven assembly of any of the previous or subsequent Examples, further comprising at least one identification prong electrically coupled with the heating element. 
     Example 5 
     The oven assembly of any of the previous or subsequent Examples, wherein the identification prong extends from the heating element through the base. 
     Example 6 
     The oven assembly of any of the previous or subsequent Examples, further comprising a heating profile, wherein an electrical resistance of the at least one identification prong is associated with the heating profile. 
     Example 7 
     The oven assembly of any of the previous or subsequent Examples, further comprising a frit, wherein the frit is disposed between the heating element and the second chamber. 
     Example 8 
     The oven assembly of any of the previous or subsequent Examples, further comprising an air plenum defined at least in part by the oven element, wherein the air plenum is disposed between the frit and the second chamber. 
     Example 9 
     The oven assembly of any of the previous or subsequent Examples, wherein the oven element includes a wall, wherein the wall defines at least one chamber opening, wherein the at least one chamber opening extends between the air plenum and the second chamber. 
     Example 10 
     The oven assembly of any of the previous or subsequent Examples, wherein the heating element is a first heating element and further comprising a second heating element, wherein the second heating element is disposed between the frit and the air plenum. 
     Example 11 
     The oven assembly of any of the previous or subsequent Examples, further comprising a temperature sensor, wherein the temperature sensor is disposed in one of the first chamber and the second chamber. 
     Example 12 
     The oven assembly of any of the previous or subsequent Examples, wherein the base comprises polyetheretherketone. 
     Example 13 
     The oven assembly of any of the previous or subsequent Examples, wherein the oven element includes a tooth. 
     Example 14 
     The oven assembly of any of the previous or subsequent Examples, wherein the oven element includes an upper surface, wherein the upper surface is sloped toward the second chamber. 
     Example 15 
     The oven assembly of any of the previous or subsequent Examples, wherein the oven element is removable from the first chamber. 
     Example 16 
     The oven assembly of any of the previous or subsequent Examples, wherein the oven element includes a seal, wherein the seal defines a filter opening, and wherein a filter is disposed in the filter opening. 
     Example 17 
     An oven assembly sized to be received in an oven receiving area defined by a vaporizer, the oven assembly comprising a base, a chamber defined by the base, a heating element disposed in the chamber, wherein the heating element is configured to be electrically coupled with a vaporizer when the oven assembly is disposed in an oven receiving area of the vaporizer, wherein the heating element is configured to heat air within the chamber, and an oven element disposed in the chamber, wherein the oven element is configured to pass the heated air therethrough. 
     Example 18 
     The oven assembly of any of the previous or subsequent Examples, wherein the chamber comprises a first chamber and further comprising a second chamber defined by the oven element. 
     Example 19 
     The oven assembly of any of the previous or subsequent Examples, further comprising an outer wall extending from the base; and an air flow pathway defined at least in part by the outer wall and the oven element, wherein the air flow pathway is configured to direct air past the heating element to heat the air. 
     Example 20 
     A vaporizer system configured to vaporize a substance, the vaporizer system comprising (a) a vaporizer comprising, a housing, a battery disposed in the housing, and an oven receiving area defined by the vaporizer; and (b) an oven assembly configured to be received in the oven receiving area, the oven assembly comprising, a base, an outer wall extending from the base, a first chamber defined by the outer wall and the base, an oven element disposed in the first chamber, a second chamber defined by the oven element, and at least one opening defined by the oven element. 
     V. Miscellaneous 
     It should be understood that any of the examples described herein may include various other features in addition to or in lieu of those described above. By way of example only, any of the examples described herein may also include one or more of the various features disclosed in any of the various references that are incorporated by reference herein. 
     It should be understood that any one or more of the teachings, expressions, embodiments, examples, etc. described herein may be combined with any one or more of the other teachings, expressions, embodiments, examples, etc. that are described herein. The above-described teachings, expressions, embodiments, examples, etc. should therefore not be viewed in isolation relative to each other. Various suitable ways in which the teachings herein may be combined will be readily apparent to those of ordinary skill in the art in view of the teachings herein. Such modifications and variations are intended to be included within the scope of the claims. 
     It should be appreciated that any patent, publication, or other disclosure material, in whole or in part, that is said to be incorporated by reference herein is incorporated herein only to the extent that the incorporated material does not conflict with existing definitions, statements, or other disclosure material set forth in this disclosure. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material. 
     Having shown and described various versions of the present invention, further adaptations of the methods and systems described herein may be accomplished by appropriate modifications by one of ordinary skill in the art without departing from the scope of the present invention. Several of such potential modifications have been mentioned, and others will be apparent to those skilled in the art. For instance, the examples, versions, geometrics, materials, dimensions, ratios, steps, and the like discussed above are illustrative and are not required. Accordingly, the scope of the present invention should be considered in terms of the following claims and is understood not to be limited to the details of structure and operation shown and described in the specification and drawings.