Patent Publication Number: US-2022218025-A1

Title: Vaporizer assembly

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a continuation application of U.S. application Ser. No. 16/196,749, filed Nov. 20, 2018, the entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     Field 
     Example embodiments relate to electronic vaping devices, e-vaping devices, or the like. 
     Description of Related Art 
     E-vaping devices, also referred to herein as electronic vaping devices (EVDs) may be used by adult vapers for fluid portable vaping. An e-vaping device may include a reservoir that holds pre-vapor formulation and a vaporizer assembly that may heat pre-vapor formulation drawn from the reservoir to generate a vapor. 
     SUMMARY 
     According to some example embodiments, a vaporizer assembly for an e-vaping device includes a heating element, a conduit assembly, and a dispensing interface assembly. The conduit assembly may include one or more inner surfaces defining a conduit extending through an interior of the conduit assembly, such that the conduit assembly is configured to direct air to flow through the conduit in fluid communication with the heating element. The dispensing interface assembly may be configured to be in fluid communication with both the conduit and a reservoir holding pre-vapor formulation. The dispensing interface assembly may be configured to supply a limited amount of the pre-vapor formulation from the reservoir to the heating element. The dispensing interface assembly may include a first dispensing interface and a second dispensing interface. The first dispensing interface may extend through the conduit and be coupled to the heating element within the conduit such that the first dispensing interface is in direct fluid communication with the conduit and the heating element. A portion of the second dispensing interface may be exposed to an exterior of the vaporizer assembly such that the second dispensing interface is configured to be in direct fluid communication with the reservoir via the portion of the second dispensing interface. The second dispensing interface may be isolated from direct fluid communication with the heating element by the first dispensing interface. The first dispensing interface may be isolated from direct fluid communication with the reservoir by the second dispensing interface. The second dispensing interface may be configured to restrict a flow of pre-vapor formulation from the reservoir to the first dispensing interface. 
     The conduit assembly may include a hollow cylindrical inner housing. The first dispensing interface may extend transversely between opposing inner surfaces of the hollow cylindrical inner housing. The second dispensing interface may include a hollow cylindrical dispensing interface structure that extends around an outer surface of the hollow cylindrical inner housing. An inner surface of the hollow cylindrical dispensing interface structure may be direct contact with a surface of the first dispensing interface. An outer surface of the hollow cylindrical dispensing interface structure may be exposed to the exterior of the vaporizer assembly. 
     The vaporizer assembly may include a cylindrical outer housing including a port extending through the cylindrical outer housing. The hollow cylindrical inner housing, the first dispensing interface, and the second dispensing interface may be enclosed within an interior space defined by the cylindrical outer housing. The hollow cylindrical dispensing interface structure may be in an annular space defined by the outer surface of the hollow cylindrical inner housing and an inner surface of the cylindrical outer housing. The cylindrical outer housing may be configured to expose the annular space to the reservoir through the port, such that the hollow cylindrical dispensing interface structure within the annular space is configured to be in direct fluid communication with the reservoir through the port. 
     The first dispensing interface may be in direct contact with the heating element. 
     The second dispensing interface may be in direct contact with the first dispensing interface. 
     The second dispensing interface may be isolated from direct fluid communication with the conduit. 
     The vaporizer assembly may be configured to be detachably coupled to the reservoir. 
     According to some example embodiments, a cartridge for an e-vaping device may include a reservoir configured to hold a pre-vapor formulation and a vaporizer assembly coupled to the reservoir. The vaporizer assembly may be configured to draw pre-vapor formulation from the reservoir. The vaporizer assembly may be configured to heat the drawn pre-vapor formulation to form a generated vapor. The vaporizer assembly may include a heating element, a conduit assembly, and a dispensing interface assembly. The conduit assembly may include one or more inner surfaces defining a conduit extending through an interior of the conduit assembly, such that the conduit assembly is configured to direct air to flow through the conduit in fluid communication with the heating element. The dispensing interface assembly may be configured to be in fluid communication with both the conduit and the reservoir. The dispensing interface assembly may be configured to supply a limited amount of the pre-vapor formulation from the reservoir to the heating element. The dispensing interface assembly may include a first dispensing interface and a second dispensing interface. The first dispensing interface may extend through the conduit and may be coupled to the heating element within the conduit such that the first dispensing interface is in direct fluid communication with the conduit and the heating element. A portion of the second dispensing interface may be exposed to an exterior of the vaporizer assembly such that the second dispensing interface is configured to be in direct fluid communication with the reservoir via the portion of the second dispensing interface. The second dispensing interface may be isolated from direct fluid communication with the heating element by the first dispensing interface. The first dispensing interface may be isolated from direct fluid communication with the reservoir by the second dispensing interface. The second dispensing interface may be configured to restrict a flow of pre-vapor formulation from the reservoir to the first dispensing interface. 
     The conduit assembly may include a hollow cylindrical inner housing. The first dispensing interface may extend transversely between opposing inner surfaces of the hollow cylindrical inner housing. The second dispensing interface may include a hollow cylindrical dispensing interface structure that extends around an outer surface of the hollow cylindrical inner housing. An inner surface of the hollow cylindrical dispensing interface structure may be direct contact with a surface of the first dispensing interface. An outer surface of the hollow cylindrical dispensing interface structure may be exposed to the exterior of the vaporizer assembly. 
     The vaporizer assembly may include a cylindrical outer housing including a port extending through the cylindrical outer housing. The hollow cylindrical inner housing, the first dispensing interface, and the second dispensing interface may be enclosed within an interior space defined by the cylindrical outer housing. The hollow cylindrical dispensing interface structure of the second dispensing interface may be in an annular space defined by the outer surface of the hollow cylindrical inner housing and an inner surface of the cylindrical outer housing. The cylindrical outer housing may be configured to expose the annular space to the reservoir through the port, such that the hollow cylindrical dispensing interface structure within the annular space is configured to be in direct fluid communication with the reservoir through the port. 
     The first dispensing interface may be in direct contact with the heating element. 
     The second dispensing interface may be in direct contact with the first dispensing interface. 
     The second dispensing interface may be isolated from direct fluid communication with the conduit. 
     The vaporizer assembly may be detachably coupled to the reservoir. 
     According to some example embodiments, an e-vaping device may include a cartridge and a power supply assembly coupled to the cartridge. The cartridge may include a reservoir configured to hold a pre-vapor formulation and a vaporizer assembly coupled to the reservoir. The vaporizer assembly may be configured to draw pre-vapor formulation from the reservoir. The vaporizer assembly may be configured to heat the drawn pre-vapor formulation to form a generated vapor. The vaporizer assembly may include a heating element, a conduit assembly, and a dispensing interface assembly. The conduit assembly may include one or more inner surfaces defining a conduit extending through an interior of the conduit assembly, such that the conduit assembly is configured to direct air to flow through the conduit in fluid communication with the heating element. The dispensing interface assembly may be configured to be in fluid communication with both the conduit and the reservoir. The dispensing interface assembly may be configured to supply a limited amount of the pre-vapor formulation from the reservoir to the heating element. The dispensing interface assembly may include a first dispensing interface and a second dispensing interface. The first dispensing interface may extend through the conduit and may be coupled to the heating element within the conduit such that the first dispensing interface is in direct fluid communication with the conduit and the heating element. A portion of the second dispensing interface may be exposed to an exterior of the vaporizer assembly such that the second dispensing interface is configured to be in direct fluid communication with the reservoir via the portion of the second dispensing interface. The second dispensing interface may be isolated from direct fluid communication with the heating element by the first dispensing interface. The first dispensing interface may be isolated from direct fluid communication with the reservoir by the second dispensing interface. The second dispensing interface may be configured to restrict a flow of pre-vapor formulation from the reservoir to the first dispensing interface. The power supply assembly may include a power supply. The power supply assembly may be configured to supply electrical power from the power supply to the vaporizer assembly. 
     The conduit assembly may include a hollow cylindrical inner housing. The first dispensing interface may extend transversely between opposing inner surfaces of the hollow cylindrical inner housing. The second dispensing interface may include a hollow cylindrical dispensing interface structure that extends around an outer surface of the hollow cylindrical inner housing. An inner surface of the hollow cylindrical dispensing interface structure may be direct contact with a surface of the first dispensing interface. An outer surface of the hollow cylindrical dispensing interface structure may be exposed to the exterior of the vaporizer assembly. 
     The vaporizer assembly may include a cylindrical outer housing including a port extending through the cylindrical outer housing. The hollow cylindrical inner housing, the first dispensing interface, and the second dispensing interface may be enclosed within an interior space defined by the cylindrical outer housing. The hollow cylindrical dispensing interface structure of the second dispensing interface may be in an annular space defined by the outer surface of the hollow cylindrical inner housing and an inner surface of the cylindrical outer housing. The cylindrical outer housing may be configured to expose the annular space to the reservoir through the port, such that the hollow cylindrical dispensing interface structure within the annular space is configured to be in direct fluid communication with the reservoir through the port. 
     The first dispensing interface may be in direct contact with the heating element. 
     The second dispensing interface may be in direct contact with the first dispensing interface. 
     The second dispensing interface may be isolated from direct fluid communication with the conduit. 
     The vaporizer assembly may be detachably coupled to the reservoir. 
     The cartridge may be detachably coupled to the power supply assembly. 
     The vaporizer assembly may be detachably coupled to the reservoir. 
     The power supply may be a rechargeable battery. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The various features and advantages of the non-limiting example embodiments herein may become more apparent upon review of the detailed description in conjunction with the accompanying drawings. The accompanying drawings are merely provided for illustrative purposes and should not be interpreted to limit the scope of the claims. The accompanying drawings are not to be considered as drawn to scale unless explicitly noted. For purposes of clarity, various dimensions of the drawings may have been exaggerated. 
         FIG. 1A  is a side view of an e-vaping device according to some example embodiments. 
         FIG. 1B  is a cross-sectional view along line IB-IB′ of the e-vaping device of  FIG. 1A  according to some example embodiments. 
         FIG. 2A  is a perspective view of a vaporizer assembly according to some example embodiments. 
         FIG. 2B  is a cross-sectional view along line IIB-IIB′ of the vaporizer assembly of  FIG. 2A  according to some example embodiments. 
         FIG. 2C  is a cross-sectional view along line IIC-IIC′ of the vaporizer assembly of  FIG. 2A  according to some example embodiments. 
         FIG. 3A  is a perspective view of a vaporizer assembly according to some example embodiments. 
         FIG. 3B  is a cross-sectional view along line IIIB-IIIB′ of the vaporizer assembly of  FIG. 3A  according to some example embodiments. 
         FIG. 4A  is a perspective view of a vaporizer assembly according to some example embodiments. 
         FIG. 4B  is a cross-sectional view along line IVB-IVB′ of the vaporizer assembly of  FIG. 4A  according to some example embodiments. 
         FIG. 4C  is a cross-sectional view along line IVC-IVC′ of the vaporizer assembly of  FIG. 4A  according to some example embodiments. 
         FIG. 5  is a cross-sectional view of a vaporizer assembly according to some example embodiments. 
         FIG. 6A  is a perspective view of a vaporizer assembly according to some example embodiments. 
         FIG. 6B  is a perspective view of the vaporizer assembly of  FIG. 6A  according to some example embodiments. 
         FIG. 6C  is a cross-sectional view along line VIC-VIC′ of the vaporizer assembly of  FIG. 6A  according to some example embodiments. 
         FIG. 7A  is a side view of an e-vaping device according to some example embodiments. 
         FIG. 7B  is a side view of the e-vaping device of  FIG. 7A  according to some example embodiments. 
         FIG. 7C  is a cross-sectional view along line VIIC-VIIC′ of the e-vaping device of  FIG. 7A  according to some example embodiments. 
     
    
    
     DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS 
     Some detailed example embodiments are disclosed herein. However, specific structural and functional details disclosed herein are merely provided for purposes of describing example embodiments. Example embodiments may, however, be embodied in many alternate forms and should not be construed as limited to only the example embodiments set forth herein. 
     Accordingly, while example embodiments are capable of various modifications and alternative forms, example embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments to the particular forms disclosed, but to the contrary, example embodiments are to cover all modifications, equivalents, and alternatives thereof. Like numbers refer to like elements throughout the description of the figures. 
     It should be understood that when an element or layer is referred to as being “on,” “connected to,” “coupled to,” “attached to,” “adjacent to,” or “covering” another element or layer, it may be directly on, connected to, coupled to, attached to, adjacent to or covering the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout the specification. As used herein, the term “and/or” includes any and all combinations or sub-combinations of one or more of the associated listed items. 
     It should be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, regions, layers and/or sections, these elements, regions, layers, and/or sections should not be limited by these terms. These terms are only used to distinguish one element, region, layer, or section from another region, layer, or section. Thus, a first element, region, layer, or section discussed below could be termed a second element, region, layer, or section without departing from the teachings of example embodiments. 
     Spatially relative terms (e.g., “beneath,” “below,” “lower,” “above,” “upper,” and the like) may be used herein for ease of description to describe one element or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the term “below” may encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     The terminology used herein is for the purpose of describing various example embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “includes,” “including,” “comprises,” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, and/or elements, etc., but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, etc., and/or groups thereof. 
     When the words “about” and “substantially” are used in this specification in connection with a numerical value, it is intended that the associated numerical value include a tolerance of ±10% around the stated numerical value, unless otherwise explicitly defined. 
     Example embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of example embodiments. As such, variations from the shapes of the illustrations are to be expected. Thus, example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes. 
     Vapor, aerosol and dispersion are used interchangeably and are meant to cover the matter generated or outputted by the devices disclosed, claimed and/or equivalents thereof. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, including those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Hardware may be implemented using processing or control circuitry such as, but not limited to, one or more processors, one or more Central Processing Units (CPUs), one or more microcontrollers, one or more arithmetic logic units (ALUs), one or more digital signal processors (DSPs), one or more microcomputers, one or more field programmable gate arrays (FPGAs), one or more System-on-Chips (SoCs), one or more programmable logic units (PLUs), one or more microprocessors, one or more Application Specific Integrated Circuits (ASICs), or any other device or devices capable of responding to and executing instructions in a defined manner. 
       FIG. 1A  is a side view of an e-vaping device  100  according to some example embodiments.  FIG. 1B  is a cross-sectional view along line IB-IB′ of the e-vaping device  100  of  FIG. 1A  according to some example embodiments. As used herein, the term “e-vaping device” is inclusive of all types of electronic vaping devices, regardless of form, size or shape. 
     Referring to  FIGS. 1A-1B , the e-vaping device  100  includes a vapor generator assembly  110  and a power supply assembly  120 . In some example embodiments, a vapor generator assembly  110  that is configured to be detachably coupled to a power supply assembly  120  to form an e-vaping device  100  may be referred to herein as a cartridge. 
     In some example embodiments, the vapor generator assembly  110  and power supply assembly  120  include respective complementary connector assemblies  118 ,  128  and are configured to be detachably connected to each other based on detachably coupling the connector assemblies  118 ,  128  together. In some example embodiments, the connector assemblies  118 ,  128  include threaded connectors. It should be appreciated that a connector assembly  118 ,  128  may be any type of connector, including, without limitation, a snug-fit, detent, clamp, bayonet, sliding fit, sleeve fit, alignment fit, threaded connector, magnetic, clasp, or any other type of connection, and/or combinations thereof. 
     As shown in  FIGS. 1A-1B , the vapor generator assembly  110  may include an outer housing  111 , and the power supply assembly  120  may include an outer housing  121 . As further shown in  FIGS. 1A-1B , in some example embodiments, the outer housing  111  of the vapor generator assembly  110  and the outer housing  121  of the power supply assembly  120  may include a unitary piece of material. 
     As shown in  FIGS. 1A-1B , the vapor generator assembly  110  may include a reservoir  112  and a vaporizer assembly  130 . The outer housing  111  of the vapor generator assembly  110  may include an outer housing  113  of the reservoir  112  and a separate outer housing  131  of the vaporizer assembly  130 . In some example embodiments, housings  113  and  131  are separate connectable housings, and in some example embodiments housings  113  and  131  form part of the same housing. As shown in  FIGS. 1A-1B , in some example embodiments, the outer housing  113  of the reservoir  112  and the outer housing  131  of the vaporizer assembly  130  may be included in a unitary piece of material. In some example embodiments, where housing  113  meets with housing  131  may form part of the same housing, or these may be two separate housings that can be connected together via complementary connector assemblies  138 ,  148 . 
     The outer housing  113  of the reservoir  112  may at least partially define an interior space  115 . The reservoir  112  may be configured to hold a pre-vapor formulation within the interior of the reservoir  112 , where the interior may include the interior space  115  at least partially defined by the outer housing  113  of the reservoir  112 . 
     As shown in at least  FIGS. 1A-1B , the vaporizer assembly  130  may include an outer housing  131  that at least partially defines an interior space  135  of the vaporizer assembly  130 . As further shown in at least  FIGS. 1A-1B , the vaporizer assembly  130  may include a fluid port  134 , which extends through the outer housing  131  of the vaporizer assembly  130  between the interior space  135  of the vaporizer assembly  130  and an exterior of the vaporizer assembly  130 , such that the fluid port  134  may enable fluid communication between elements at least partially located within the interior space  135  and an exterior of the vaporizer assembly  130 . As further shown in  FIG. 1B , the fluid port  134  may enable fluid communication between the reservoir  112  and the vaporizer assembly  130 . In some example embodiments, the fluid port  134  extends through the outer housing  113  of the reservoir  112 , in addition to or instead of extending through the outer housing  131  of the vaporizer assembly  130 . 
     In some example embodiments, the vaporizer assembly  130  and reservoir  112  include respective complementary connector assemblies  138 ,  148  and are configured to be detachably connected to each other based on detachably coupling the connector assemblies  138 ,  148  together. For example, the vaporizer connector assembly  148  may be configured to detachably couple the reservoir  112  with the vaporizer assembly  130 , for example based on detachably coupling with the connector assembly  138  of the vaporizer assembly  130 . In some example embodiments, the connector assemblies  138 ,  148  include threaded connectors. It should be appreciated that a connector assembly  138 ,  148  may be any type of connector, including, without limitation, a snug-fit, detent, clamp, bayonet, sliding fit, sleeve fit, alignment fit, threaded connector, magnetic, clasp, or any other type of connection, and/or combinations thereof. 
     The vaporizer assembly  130  may include conduit assembly  133 , an inlet port  132 , an outlet port  142 , a heating element  136 , and a dispensing interface assembly  150 . As shown in  FIG. 1B , the inlet port  132  may extend through the outer housing  131  of the vaporizer assembly  130  to an exterior of the vaporizer assembly  130 , and the outlet port  142  may extend through the outer housing  131  of the vaporizer assembly  130 . In some example embodiments, the outlet port  142  may extend through the outer housing  131  to be directly exposed to an exterior of at least the vapor generator assembly  110 . 
     In some example embodiments, including the example embodiments shown in  FIGS. 1A-1B , the inlet port  132  may be coupled with inlet port  152  via conduit  154 , where the inlet port  152  is directly exposed to the exterior of the vapor generator assembly  110  and the exterior of the e-vaping device  100 , such that the inlet port  132  is in fluid communication with the exterior of at least the vapor generator assembly  110  via the inlet port  152  and the conduit  154 . In some example embodiments, where the inlet port  132  is directly exposed to the exterior of the vapor generator assembly  110 , the inlet port  152  and the conduit  154  may be omitted from the e-vaping device  100 . Accordingly, the inlet port  132  enables fluid communication, directly or indirectly, between at least a portion of the interior space  135  of the vaporizer assembly  130  and the exterior of the vapor generator assembly  110 . 
     In some example embodiments, including the example embodiments shown in  FIGS. 1A-1B , the outlet port  142  may be coupled with outlet port  144  via conduit  140 , where the outlet port  144  is directly exposed to the exterior of the vapor generator assembly  110  and the exterior of the e-vaping device  100 , such that the outlet port  142  is in fluid communication with the exterior of at least the vapor generator assembly  110  via the outlet port  144  and the conduit  140 . Accordingly, the outlet port  142  enables fluid communication between at least a portion of the interior space  135  of the vaporizer assembly  130  and the exterior of the vapor generator assembly  110 . 
     Still referring to the vaporizer assembly  130 , the conduit assembly  133  is a structure that extends between the inlet port  132  and the outlet port  142  of the vaporizer assembly  130  within the interior space  135  that is at least partially defined by the outer housing  131  of the vaporizer assembly  130 . As shown, one or more inner surfaces  1331  of the conduit assembly  133  define a hollow space, referred to herein as a conduit  193 , that extends continuously through the conduit assembly  133  between the inlet port  132  and the outlet port  142 . Accordingly, the conduit assembly  133  establishes fluid communication, via the conduit  193  defined by the inner surface(s)  1331 , between the inlet port  132  and the outlet port  142  through the vaporizer assembly  130 . 
     In operation of an e-vaping device  100  according to some example embodiments, air may be drawn into the vaporizer assembly  130  via at least the inlet port  132  and the air may further be drawn through the vaporizer assembly  130  via conduit assembly  133  and further drawn out of the vaporizer assembly  130  and out of the vapor generator assembly  110 , and thus out of the e-vaping device  100 , via outlet port  142 , conduit  140 , and outlet port  144 . In some example embodiments, and as shown in at least  FIG. 1B , conduit assembly  133  may be a cylindrical structure with one or more inner surfaces  1331  that define the conduit  193  between inlet port  132  and outlet port  142  to establish fluid communication between the inlet port  132  and the outlet port  142  through the vaporizer assembly  130 . 
     In the example embodiments shown in  FIGS. 1A-1B , the conduit  154  and inlet port  152  may be at least partially located in the connector assembly  118 . However, it will be understood that the inlet port  152  may be included in, and may extend through, outer housing  111  of the vapor generator assembly  110  independently of connector assembly  118 , outer housing  121  of the power supply assembly  120 , connector assembly  128 , a sub-combination thereof, or a combination thereof. Additionally, it will be understood that the conduit  154  may extend at least partially through the vapor generator assembly  110 , the power supply assembly  120 , connector assembly  118 , connector assembly  128 , a sub-combination thereof, or a combination thereof. 
     Still referring to the vaporizer assembly  130 , the dispensing interface assembly  150  is at least partially exposed to fluid port  134  and thus is configured to be in fluid communication with the reservoir  112  through the fluid port  134 . The dispensing interface assembly  150  further extends at least partially into the conduit assembly  133 . The dispensing interface assembly  150  may be in fluid communication with the conduit  193  based on the dispensing interface assembly  150  being coupled to the heating element  136 . Accordingly, the dispensing interface assembly  150  may be in fluid communication with both the reservoir  112  and the conduit  193  and thus may be configured to draw pre-vapor formulation from the reservoir  112  to the conduit  193 . 
     In some example embodiments, the heating element  136  may be located at least partially within the conduit  193 . The heating element  136  may be in fluid communication with the conduit  193 , and the conduit assembly  133  may be configured to direct air received via inlet port  132  to flow through the conduit  193  in fluid communication with the heating element  136 . As shown in at least  FIG. 1B , the heating element  136  is in fluid communication with the dispensing interface assembly  150 , such that the heating element  136  is configured to heat at least a portion of the pre-vapor formulation drawn into the conduit  193  via the dispensing interface assembly  150  to form a generated vapor within the conduit  193 , such that the generated vapor may be drawn out of the vaporizer assembly  130  and out of the vapor generator assembly  110 , and thus out of the e-vaping device  100 , through outlet port  142 , conduit  140 , and outlet port  144 . For example, the heating element  136  may be directly coupled to a portion of the dispensing interface assembly  150  that extends at least partially into the conduit  193 , or may be in sufficiently close proximity to such a portion of the dispensing interface assembly  150 , to be configured to generate sufficient heat to heat the pre-vapor formulation drawn into the portion of the dispensing interface assembly  150  to generate the generated vapor. 
     Referring back to the dispensing interface assembly  150 , the dispensing interface assembly  150  includes a first dispensing interface  150 - 1  and a second dispensing interface  150 - 2  that are coupled together and thus are configured to enable transfer of pre-vapor formulation therebetween. 
     As shown in  FIG. 1B , the first dispensing interface  150 - 1  may extend at least partially through the conduit assembly  133  and may be coupled to the heating element  136  within the conduit assembly  133 , such that the first dispensing interface  150 - 1  is in fluid communication with the conduit  193  and the heating element  136 . Additionally, as shown in  FIG. 1B , the first dispensing interface  150 - 1  may extend at least partially out of the conduit assembly  133  while still within the interior space  135  of the vaporizer assembly  130 , such that the first dispensing interface  150 - 1  is in direct fluid communication with the exterior of the conduit assembly  133  within the interior space  135  of the vaporizer assembly  130 . 
     As shown in  FIG. 1B , the second dispensing interface  150 - 2  may be located external to the conduit assembly  133  within the interior space  135  of the vaporizer assembly  130 . The second dispensing interface  150 - 2  may be located within an internal space  175  that is defined by at least the outer housing  131  and one or more outer surfaces  133 U of the conduit assembly  133 . Accordingly, it will be understood that the internal space  175  may be a limited portion of the interior space  135  that excludes the portion of the interior space  135  that is occupied by the conduit assembly  133  and the conduit  193  defined thereby. As shown, at least a portion of the second dispensing interface  150 - 2  is exposed to an exterior of the vaporizer assembly  130 , for example based on being directly adjacent to and covering an end of the fluid port  134  as shown in  FIG. 1B . The second dispensing interface  150 - 2  may be configured to be in direct fluid communication with the reservoir  112  via the fluid port  134  to which the second dispensing interface  150 - 2  is directly exposed. 
     As further shown in  FIG. 1B , the second dispensing interface  150 - 2  may be coupled to the first dispensing interface  150 - 1  externally to the conduit assembly  133 , within internal space  175 , while the first dispensing interface  150 - 1  may be coupled to the heating element  136 , such that the second dispensing interface  150 - 2  may be isolated from direct fluid communication with the conduit  193 , the heating element  136 , or a combination thereof by the first dispensing interface  150 - 1 . Pre-vapor formulation drawn into the second dispensing interface  150 - 2  from the reservoir  112  through the fluid port  134  may be further drawn from the second dispensing interface  150 - 2  to the first dispensing interface  150 - 1  and may be further drawn into the conduit  193  and into fluid communication with the heating element  136  by the first dispensing interface  150 - 1 , while the second dispensing interface  150 - 2  remains isolated from directly transferring fluid into sufficient proximity to the heating element  136  to enable the heating element  136  to heat pre-vapor formulation held in the second dispensing interface  150 - 2  to generate the generated vapor. 
     Additionally, and as shown in  FIG. 1B , the first dispensing interface  150 - 1  may be isolated from direct fluid communication with the reservoir  112  by the second dispensing interface  150 - 2 , such that the first dispensing interface  150 - 1  may be isolated from directly drawing pre-vapor formulation from the reservoir  112  independently of the second dispensing interface  150 - 2 . 
     In some example embodiments, the second dispensing interface  150 - 2  is configured to restrict a flow of pre-vapor formulation from the reservoir  112  to the first dispensing interface  150 - 1 , relative to embodiments where the first dispensing interface  150 - 1  is directly exposed to both the conduit and the reservoir  112  and thus may draw pre-vapor formulation directly from the reservoir  112  to fluid communication with the heating element  136 . Accordingly, the second dispensing interface  150 - 2  may be configured to restrict an amount of pre-vapor formulation held in the dispensing interface assembly  150  to not exceed a particular amount and/or may restrict a flow-rate of pre-vapor formulation from the reservoir  112  to the conduit assembly  133 . 
     For example, the first dispensing interface  150 - 1  may include a wicking material that is configured to be exposed to heat generated by the heating element  136  and may be configured to support a relatively high flow rate of pre-vapor formulation through the internal structure of the first dispensing interface  150 - 1 , while the second dispensing interface  150 - 2  may be configured to support a relatively low flow rate of pre-vapor formulation through the internal structure of the second dispensing interface  150 - 2 . The first dispensing interface  150 - 1  may include a wicking material that is configured to be in direct contact with the heating element  136 . The second dispensing interface  150 - 2  may have reduced resilience to heat that would be generated by heating element  136 , in relation to the resilience of the first dispensing interface  150 - 1 . In some example embodiments, the second dispensing interface  150 - 2  may have equal or greater resilience to heat that would be generated by heating element  136 , in relation to the resilience of the first dispensing interface  150 - 1 . 
     In some example embodiments, the first dispensing interface  150 - 1  may be configured to support a first maximum flow rate of pre-vapor formulation through the internal structure of the first dispensing interface  150 - 1 , and the second dispensing interface  150 - 2  may be configured to support a second maximum flow rate of pre-vapor formulation through the internal structure of the second dispensing interface  150 - 2 , where the magnitude of the second maximum flow rate is equal to or less than one-half (i.e., 50%) of the magnitude of the first maximum flow rate. The second dispensing interface  150 - 2  may be configured to “wick” pre-vapor formulation in at least twice the amount of time that the first dispensing interface  150 - 1  is configured to “wick” pre-vapor formulation. Restated further, the second dispensing interface  150 - 2  may be associated with a “wicking speed” that is equal to or less than one-half the wicking speed with which the first dispensing interface  150 - 1  is associated. 
     In some example embodiments, the second dispensing interface  150 - 2  is configured to hold an amount of pre-vapor formulation, within the internal structure of the second dispensing interface  150 - 2 , that is sufficient to support at least one full generation of vapor, when the held amount of pre-vapor formulation is further drawn from the second dispensing interface  150 - 2  to the first dispensing interface  150 - 1  and is further heated by the heating element  136  to form the vapor. In some example embodiments, the second dispensing interface  150 - 2  is configured to hold an amount of pre-vapor formulation, within the internal structure of the second dispensing interface  150 - 2 , that is sufficient to support up to three full generations of vapor, when the held amount of pre-vapor formulation is further drawn from the second dispensing interface  150 - 2  to the first dispensing interface  150 - 1  and is further heated by the heating element  136  to form the vapor. 
     In some example embodiments, the vapor generator assembly  110  may be configured to generate at least one additional instance of vapor even after the reservoir  112  is completely depleted of all pre-vapor formulation, because an amount of pre-vapor formulation sufficient to support the generation of at least one additional instance of vapor is still held in the second dispensing interface  150 - 2  upon the moment of complete depletion of pre-vapor formulation from the reservoir  112 . In some example embodiments, where the outer housing  113  is sufficiently transparent to enable external observation of an amount of pre-vapor formulation held in the reservoir  112 , the configuration of the second dispensing interface  150 - 2  to hold pre-vapor formulation even upon depletion of the pre-vapor formulation held in the reservoir  112  may enable the second dispensing interface  150 - 2  to provide a buffer against complete depletion of pre-vapor formulation from the vapor generator assembly  110  prior to replenishment of the pre-vapor formulation in the reservoir  112 , thereby enabling depletion of the pre-vapor formulation from the reservoir  112  to be observed through the outer housing  113 , and the reservoir  112  to be replenished with additional pre-vapor formulation, while the dispensing interface  150 - 2  is able to support generation of at least one additional instance of vapor in the event that the complete depletion of the reservoir  112  is initially unnoticed, and at least one instance of vapor is generated, subsequent to depletion of the reservoir  112 . Thus, it will be understood that the second dispensing interface  150 - 2  may provide a buffer against complete depletion of pre-vapor formulation at the first dispensing interface  150 - 1 , thereby protecting against overheating of the dispensing interface assembly  150  due to heating of a depleted first dispensing interface  150 - 1  by the heating element  136  and thus improving performance of an e-vaping device  100  that includes the dispensing interface assembly  150 . 
     Based on the second dispensing interface  150 - 2  restricting the flow of pre-vapor formulation from the reservoir  112  to the conduit  193 , the dispensing interface assembly  150  that includes both the first and second dispensing interfaces  150 - 1 ,  150 - 2  may be configured to control the flow of pre-vapor formulation from the reservoir  112  to the conduit  193  and thus ensure that a particular amount of pre-vapor formulation is heated by the heating element  136  in the conduit  193  to generate the generated vapor, thereby improving operational performance of the e-vaping device  100  and improving the sensory experience provided by the e-vaping device  100  and efficiency of said e-vaping device with regard to utilization of pre-vapor formulation to generate a generated vapor. Such a dispensing interface assembly  150  may also mitigate or prevent leakage of un-vaporized pre-vapor formulation from the first dispensing interface  150 - 1  into the conduit assembly  133 , and thus potentially to an exterior of the vapor generator assembly  110  and exterior of the e-vaping device  100  through inlet port(s)  132 ,  152  and/or outlet ports  142 ,  144 , thereby improving e-vaping device operational performance and efficiency with regard to utilization of pre-vapor formulation to generate a generated vapor. Such a dispensing interface assembly  150  may also mitigate or prevent storage of excessive amounts of pre-vapor formulation within the interior space  135  of the vaporizer assembly  130 , thereby mitigating loss of pre-vapor formulation from the e-vaping device  100  in example embodiments where the vaporizer assembly  130  may be detachably coupled to the vapor generator assembly  110  via coupling of connector assemblies  138 ,  148  and thus may be decoupled and swapped for a replacement vaporizer assembly  130 . Accordingly, loss of pre-vapor formulation from the e-vaping device  100  as a result of such a vapor assembly  130  swap may be mitigated by the dispensing interface assembly  150  being configured to restrict the amount of pre-vapor formulation held in the vaporizer assembly  130  to be less than a particular amount, thereby improving operational performance and efficiency of the e-vaping device  100 . Accordingly, the dispensing interface assembly  150  may be configured to supply a limited amount of the pre-vapor formulation from the reservoir  112  to the heating element  136 . 
     In some example embodiments, the e-vaping device  100  may be a unitary piece that includes the vapor generator assembly  110  and the power supply assembly  120  in the unitary piece, instead of including the vapor generator assembly  110  and the power supply assembly  120  as separate pieces that are coupled together to form the e-vaping device  100 . 
     Still referring to  FIGS. 1A-1B , the power supply assembly  120  may include a power supply  122 . The power supply  122  may be a rechargeable battery, and the power supply assembly  120  may be configured to supply electrical power from the power supply  122  to the heating element  136  via one or more electrical leads included in at least the vapor generator assembly  110  to support vapor generation at the vaporizer assembly  130 . 
     As shown in  FIGS. 1A-1B , the e-vaping device  100  may include an instance of control circuitry  124  that may be configured to control the supply of electrical power from the power supply  122  to the vaporizer assembly  130 . In the example embodiments shown in  FIGS. 1A-1B , the control circuitry  124  is included in the power supply assembly  120 , but it will be understood that, in some example embodiments, the control circuitry  124  may be included in the vapor generator assembly  110  instead of the power supply assembly  120 . 
     In some example embodiments, wherein the vapor generator assembly  110  and the power supply assembly  120  are configured to be detachably coupled via complementary connector assemblies  118  and  128 , respectively, one or more electrical circuits through the vapor generator assembly  110  and the power supply assembly  120  may be established based on connector assemblies  118 ,  128  being coupled together. The established electrical circuits may include at least the heating element  136 , the control circuitry  124 , and the power supply  122 . The electrical circuit may include one or more electrical leads in one or both of connector assemblies  118 ,  128 . 
     In some example embodiments, the power supply  122  may include a battery. In some example embodiments, the power supply  122  may be a Lithium-ion battery or one of its variants, for example a Lithium-ion polymer battery, a nickel-metal hydride battery, a nickel cadmium battery, a lithium-manganese battery, a lithium-cobalt battery, a fuel cell, etc., a sub-combination thereof, or a combination thereof. The e-vaping device  100  may be usable by an adult vaper until the energy in the power supply  122  is depleted or a minimum voltage cut-off level is achieved. Further, the power supply  122  may be rechargeable and may include circuitry configured to allow the battery to be chargeable by an external charging device. To recharge the e-vaping device  100 , a Universal Serial Bus (USB) charger or other suitable charger assembly may be used. 
     In some example embodiments, the power supply  122  may be electrically connected with the heating element  136  by control circuitry  124  based on a signal received at the control circuitry  124  from a sensor of the e-vaping device  100 , an interface of the e-vaping device  100 , or a combination thereof. To control the supply of electrical power to a heating element  136 , the control circuitry  124  may execute one or more instances of computer-executable program code. The control circuitry  124  may include a processor and a memory. The memory may be a computer-readable storage medium storing computer-executable code. The control circuitry  124  may be a special purpose machine configured to execute the computer-executable code to control the supply of electrical power to the heating element  136 . 
     In some example embodiments, connector assemblies  118 ,  128  are omitted from the e-vaping device  100 , such that the vapor generator assembly  110  and the power supply assembly  120  are fixedly coupled together and are precluded from being detachably coupled with each other. 
     In some example embodiments, connector assemblies  138 ,  148  are omitted from the vapor generator assembly  110 , such that at least the reservoir  112  and the vaporizer assembly  130  are fixedly coupled together and are precluded from being detachably coupled with each other. 
     The pre-vapor formulation is a material or combination of materials that may be transformed into a vapor. In some example embodiments, the pre-vapor formulation is propylene glycol, glycerin, a sub-combination thereof, or a combination thereof. The pre-vapor formulation may include nicotine or may exclude nicotine. The pre-vapor formulation may include one or more tobacco flavors. The pre-vapor formulation may include one or more flavors that are separate from one or more tobacco flavors. In some example embodiments, a pre-vapor formulation that includes nicotine may also include one or more acids. The one or more acids may be one or more of pyruvic acid, formic acid, oxalic acid, glycolic acid, acetic acid, isovaleric acid, valeric acid, propionic acid, octanoic acid, lactic acid, levulinic acid, sorbic acid, malic acid, tartaric acid, succinic acid, citric acid, benzoic acid, oleic acid, aconitic acid, butyric acid, cinnamic acid, decanoic acid, 3,7-dimethyl-6-octenoic acid, 1-glutamic acid, heptanoic acid, hexanoic acid, 3-hexenoic acid, trans-2-hexenoic acid, isobutyric acid, lauric acid, 2-methylbutyric acid, 2-methylvaleric acid, myristic acid, nonanoic acid, palmitic acid, 4-penenoic acid, phenylacetic acid, 3-phenylpropionic acid, hydrochloric acid, phosphoric acid, sulfuric acid and combinations thereof. 
     The reservoir  112 , in some example embodiments, may include a storage medium that may hold a pre-vapor formulation. The storage medium may be a fibrous material including at least one of cotton, polyethylene, polyester, rayon and combinations thereof. The fibers may have a diameter ranging in size from about 6 microns to about 15 microns (e.g., about 8 microns to about 12 microns or about 9 microns to about 11 microns). The storage medium may be a sintered, porous or foamed material. Also, the fibers may be sized to be irrespirable and may have a cross-section that has a Y-shape, cross shape, clover shape or any other suitable shape. In some example embodiments, the reservoir  112  may include a filled tank lacking any storage medium and containing only pre-vapor formulation. 
     The reservoir  112  may be sized and configured to hold enough pre-vapor formulation such that the e-vaping device  100  may be configured for vaping for at least about 200 seconds. The e-vaping device  100  may be configured to allow each vaping to last a maximum of about 5 seconds. 
     Each dispensing interface  150 - 1 ,  150 - 2  of the dispensing interface assembly  150  may include a wick, also referred to herein as an instance of wicking material. Each dispensing interface  150 - 1 ,  150 - 2  of the dispensing interface assembly  150  may include any suitable wicking material or combination of wicking materials. Examples of suitable wicking materials may be, but not limited to, glass, ceramic- or graphite-based materials. For example, the wicking material of the first dispensing interface  150 - 1  and/or the second dispensing interface  150 - 2  may include a bundle of glass (or ceramic) filaments, a bundle including a group of windings of glass filaments, etc., a sub-combination thereof, or a combination thereof. In some example embodiments, the wicking material of the first dispensing interface  150 - 1  and/or the second dispensing interface  150 - 2  may be capable of drawing pre-vapor formulation via capillary action by interstitial spacings between filaments thereof. The filaments may be generally aligned in a direction perpendicular to the longitudinal axis of the e-vaping device  100 . The filaments may have a cross-section that is generally cross-shaped, clover-shaped, Y-shaped, or in any other suitable shape. Each instance of wicking material of each dispensing interface  150 - 1 ,  150 - 2  of the dispensing interface assembly  150  may have any suitable capillary drawing action to accommodate pre-vapor formulations having different physical properties such as density, viscosity, surface tension and vapor pressure. 
     The first and second dispensing interfaces  150 - 1 ,  150 - 2  may include separate instances of wicking material. In some example embodiments, the first and second dispensing interfaces  150 - 1 ,  150 - 2  may include separate instances of different wicking materials, including different cotton-based wicking materials. For example, the first dispensing interface  150 - 1  may include an instance of COTTON BACON® material (the mark COTTON BACON® owned by Yiwu Taohui E-Commerce Co., Ltd.), and the second dispensing interface  150 - 2  may include an instance of MUJI® cotton pad material (the mark MUJI® owned by Ryohin Keikaku Co., Ltd.), although it will be understood that example embodiments are not limited to this example. In some example embodiments, the first and second dispensing interfaces  150 - 1 ,  150 - 2  may include separate instances of a common wicking material, including a common cotton-based wicking material. For example, the first dispensing interface  150 - 1  and the second dispensing interface  150 - 2  may each include a separate instance of COTTON BACON® material (the mark COTTON BACON® owned by Yiwu Taohui E-Commerce Co., Ltd.). In another example, the first dispensing interface  150 - 1  and the second dispensing interface  150 - 2  may each include a separate instance of MUJI® cotton pad material (the mark MUJI® owned by Ryohin Keikaku Co., Ltd.). 
     In some example embodiments, the separate instance of wicking material of each dispensing interface  150 - 1 ,  150 - 2  of the dispensing interface assembly  150  may have a particular capacity to draw the pre-vapor formulation. In some example embodiments, the first and second dispensing interfaces  150 - 1 ,  150 - 2  may include separate instances of wicking material that each have the same capacity to draw pre-vapor formulation. In some example embodiments, the first and second dispensing interfaces  150 - 1 ,  150 - 2  may include separate instances of wicking material that have different capacities to draw pre-vapor formulation. For example, a first dispensing interface  150 - 1  and the second dispensing interface  150 - 2  may include separate instances of different wicking materials, where the wicking material of the second dispensing interface  150 - 2  has a reduced capacity to draw pre-vapor formulation than the wicking material of the first dispensing interface  150 - 1 . 
     In some example embodiments, the heating element  136  may include a wire coil, although example embodiments are not limited thereto. The wire coil may at least partially surround the portion of the first dispensing interface  150 - 1  that is within the conduit  193  defined by the conduit assembly  133 . The wire may be a metal wire and/or the wire coil may extend fully or partially along the length of the portion of the first dispensing interface  150 - 1 . The wire coil may further extend fully or partially around the circumference of the portion of the first dispensing interface  150 - 1 . In some example embodiments, the wire coil may be isolated from direct contact with the first dispensing interface  150 - 1  but may be understood to be in fluid communication with the first dispensing interface  150 - 1 , based on the heating element  136  being in sufficiently close proximity to the first dispensing interface  150 - 1  to be configured to generate heat to heat the pre-vapor formulation held in the first dispensing interface  150 - 1  to form the generated vapor. 
     The heating element  136  may be formed of any suitable electrically resistive materials. Examples of suitable electrically resistive materials may include, but not limited to, titanium, zirconium, tantalum and metals from the platinum group. Examples of suitable metal alloys include, but not limited to, stainless steel, nickel, cobalt, chromium, aluminum-titanium-zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel. For example, the heating element  136  may be formed of nickel aluminide, a material with a layer of alumina on the surface, iron aluminide and other composite materials, the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required. The heating element  136  may include at least one material selected from the group consisting of stainless steel, copper, copper alloys, nickel-chromium alloys, super alloys and combinations thereof. In some example embodiments, the heating element  136  may be formed of nickel-chromium alloys or iron-chromium alloys. In some example embodiments, the heating element  136  may be a ceramic heating element having an electrically resistive layer on an outside surface thereof. 
     The heating element  136  may heat a pre-vapor formulation in the first dispensing interface  150 - 1  by thermal conduction. Heat from the heating element  136  may be conducted to the pre-vapor formulation by means of a heat conductive element or the heating element  136  may transfer heat to the incoming ambient air that is drawn through the e-vaping device  100  during vaping, which in turn heats the pre-vapor formulation by convection. 
     In some example embodiments, one or more portions of the vapor generator assembly  110  may be replaceable. Such one or more portions may include the vaporizer assembly  130 , the reservoir  112 , a sub-combination thereof, or a combination thereof. In some example embodiments, the entire e-vaping device  100  may be disposed once the reservoir  112 , the vaporizer assembly  130 , or a combination thereof is depleted. 
       FIG. 2A  is a perspective view of a vaporizer assembly  130  according to some example embodiments.  FIG. 2B  is a cross-sectional view along line IIB-IIB′ of the vaporizer assembly  130  of  FIG. 2A  according to some example embodiments.  FIG. 2C  is a cross-sectional view along line IIC-IIC′ of the vaporizer assembly  130  of  FIG. 2A  according to some example embodiments. 
     As shown in  FIGS. 2A-2C , the vaporizer assembly  130  may include a structure that includes the outer housing  131  and conduit assembly  133  collectively defining an internal space  175  that is external to the conduit assembly  133  and is internal to the vaporizer assembly  130 . As shown, the conduit assembly  133  may include a structure having inner surfaces  1331  and outer surfaces  133 U, where the inner surfaces  1331  of the conduit assembly  133  define the conduit  193  that extends continuously between opposite openings  133 A and  133 B, where opening  133 A defines the inlet port  132  and opening  133 B defines the outlet port  142  at opposite ends of the conduit  193 . As further shown, the first dispensing interface  150 - 1  may include first and second portions  150 - 1 A,  150 - 1 B, where the first portion  150 - 1 A is the portion of the first dispensing interface  150 - 1  that extends into the conduit assembly  133  and at least partially into the conduit  193  defined by the inner surfaces  1331  of the conduit assembly  133  and where the second portion  150 - 1 B is the portion of the first dispensing interface  150 - 1  that extends into the internal space  175  and is external to the conduit assembly  133 . As shown, the first and second portions  150 - 1 A,  150 - 1 B are integral portions of a unitary piece of material comprising the first dispensing interface  150 - 1 , such that the first and second portions  150 - 1 A,  150 - 1 B are in direct fluid communication with each other and enable unrestricted flow of pre-vapor formulation between the first and second portions  150 - 1 A,  150 - 1 B and thus between internal space  175  and the conduit  193  through the first dispensing interface  150 - 1 . 
     Still referring to  FIGS. 2A-2C , the outer housing  131  and outer surface  133 U of the conduit assembly  133  may collectively define an internal space  175  that is isolated from the conduit  193  and is in fluid communication with an exterior of the vaporizer assembly  130  via the fluid port  134  which extends directly between the internal space  175  and the exterior of the vaporizer assembly  130  through the outer housing  131 . As shown, the second dispensing interface  150 - 2  and the second portion  150 - 1 B of the first dispensing interface  150 - 1  may occupy the internal space  175 , such that the second dispensing interface  150 - 2  is directly adjacent to and exposed to the fluid port  134  and further is directly adjacent to and coupled to the second portion  150 - 1 B of the first dispensing interface  150 - 1 , and further such that the second dispensing interface  150 - 2  enables fluid communication between the exterior of the vaporizer assembly  130  via fluid port  134  and the conduit  193  via second dispensing interface  150 - 2  and at least the second portion  150 - 1 B of the first dispensing interface  150 - 1 . Accordingly, the second dispensing interface  150 - 2  may be in indirect fluid communication with the conduit  193  and with the heating element  136  via the first and second portions  150 - 1 A,  150 - 1 B of the first dispensing interface  150 - 1 . Additionally, the structure of the conduit assembly  133  that isolates the internal space  175  from the conduit  193  and at least the second portion  150 - 1 B of the first dispensing interface  150 - 1  further isolates the second dispensing interface  150 - 2  from the conduit  193  and thus isolates the second dispensing interface  150 - 2  from at least direct fluid communication with the heating element  136 . 
     As shown in  FIGS. 2A-2C , the conduit assembly  133  may define a non-circular conduit  193 , including a rectangular cylindrical conduit  193  as shown, but it will be understood that the conduit assembly  133  may define a conduit  193  having any shape, including a circular cylindrical conduit, a non-linear (e.g., at least partially curved) conduit, a combination or sub-combination thereof, or the like. 
       FIG. 3A  is a perspective view of a vaporizer assembly according to some example embodiments.  FIG. 3B  is a cross-sectional view along line IIIB-IIIB′ of the vaporizer assembly of  FIG. 3A  according to some example embodiments. 
     In some example embodiments, including the example embodiments shown in  FIGS. 3A-3B , the conduit assembly  133  includes a hollow cylindrical inner housing  333 , and the first dispensing interface  150 - 1  extends transversely between opposing inner surfaces  3331  of the hollow cylindrical inner housing  333  of the conduit assembly  133 . In some example embodiments, including the example embodiments shown in  FIGS. 3A-3B , the second dispensing interface  150 - 2  includes a hollow cylindrical dispensing interface structure  350 - 2  that extends around an outer surface  333 U of the hollow cylindrical inner housing  333 , such that an inner surface  350 - 21  of the hollow cylindrical dispensing interface structure  350 - 2  is in direct contact with a surface of the first dispensing interface  150 - 1 , and an outer surface  350 - 2 U of the hollow cylindrical dispensing interface structure  350 - 2  is exposed to the exterior of the vaporizer assembly  130 . For example, an inner surface  350 - 21  of the hollow cylindrical dispensing interface structure  350 - 2  may be in direct contact with a surface of the second portion  150 - 1 B of the first dispensing interface  150 - 1  as shown in  FIG. 3B . As shown in  FIGS. 3A-3B , some or all of the one or more outer surfaces  350 - 2 U of the hollow cylindrical dispensing interface structure  350 - 2  may be directly exposed to the exterior of the vaporizer assembly  130 , without being exposed via a space, port, conduit, or the like extending through one or more additional structural elements of the vaporizer assembly  130 . Accordingly, pre-vapor formulation may be drawn directly into the second dispensing interface  150 - 2  through any exposed portion of an outer surface  350 - 2 U of the hollow cylindrical dispensing interface structure  350 - 2 . 
     As shown in  FIG. 3B , the first dispensing interface  150 - 1  may be in direct contact with the heating element  136 , but example embodiments are not limited thereto. As further shown in  FIG. 3B , the second dispensing interface  150 - 2  is in direct contact with the first dispensing interface  150 - 1 , but example embodiments are not limited thereto. As further shown in  FIG. 3B , the second dispensing interface  150 - 2  is isolated from direct fluid communication with the conduit  193  by at least the conduit assembly  133  and the first dispensing interface  150 - 1 , but example embodiments are not limited thereto. As further shown in  FIGS. 3A-3B , the vaporizer assembly  130  may include a connector assembly  138  that is configured to be detachably coupled with a connector assembly associated with a reservoir, such that the vaporizer assembly  130  is configured to be detachably coupled to the reservoir, but example embodiments are not limited thereto. 
     Still referring to  FIGS. 3A-3B , the outer housing  131  may include a base structure  308  and cap structure  304 . As shown, the base structure  308  may surround a lower portion of the hollow cylindrical inner housing  333  of the conduit assembly  133 , such that a first opening  333 A of the hollow cylindrical inner housing  333  defines the inlet port  132  of the vaporizer assembly  130 . As further shown, the cap structure  304  may cover at least a portion of the second opening  333 B of the hollow cylindrical inner housing  333 , such that a portion of the cap structure  304  defines the outlet port  142  of the vaporizer assembly  130 . As shown, the cap structure  304  may include a gasket structure  306  that defines the outlet port  142 . 
       FIG. 4A  is a perspective view of a vaporizer assembly according to some example embodiments.  FIG. 4B  is a cross-sectional view along line IVB-IVB′ of the vaporizer assembly of  FIG. 4A  according to some example embodiments.  FIG. 4C  is a cross-sectional view along line IVC-IVC′ of the vaporizer assembly of  FIG. 4A  according to some example embodiments. 
     As shown in  FIGS. 4A-4C , and as distinguished from the example embodiments shown in  FIGS. 3A-3B , the outer housing  131  may include a cylindrical outer housing  302  that at least partially covers the one or more outer surfaces  350 - 2 U of the hollow cylindrical dispensing interface structure  350 - 2  of the second dispensing interface  150 - 2 . As shown, the cylindrical outer housing  302  may include one or more ports  302 P extending through the cylindrical outer housing  302  to an outer surface  302 U that is directly exposed to the exterior of the vaporizer assembly  130 , where the port  302 P at least partially comprises the fluid port  134 . In the example embodiments shown in  FIGS. 4A-4C , the outer housing  131  includes two ports  302 P extending through opposite sides of the cylindrical outer housing to opposite sides of the outer surface  302 U. It will be understood that, in some example embodiments, the outer housing  131  may include a single port  302 P. It will be understood that, in some example embodiments, the outer housing  131  may include more than two ports  302 P. 
     As shown in  FIGS. 4A-4C , the hollow cylindrical inner housing  333 , the first dispensing interface  150 - 1 , and the second dispensing interface  150 - 2  may be enclosed within an interior space at least partially defined by an inner surface  3021  of the cylindrical outer housing  302 . As shown in  FIGS. 4A-4C , the hollow cylindrical dispensing interface structure  350 - 2  of the second dispensing interface  150 - 2  may be in an annular space  335  that is at least partially defined by the outer surface  333 U of the hollow cylindrical inner housing  333  and an inner surface  3021  of the cylindrical outer housing  302 . Accordingly, as shown in  FIGS. 4A-4C , the cylindrical outer housing  302  may be configured to expose the annular space  335  to an exterior of the vaporizer assembly  130  through the one or more ports  302 P, such that the hollow cylindrical dispensing interface structure  350 - 2  within the annular space  335  is configured to be in direct fluid communication with the exterior of the vaporizer assembly  130  through the one or more ports  302 P. 
     Still referring to  FIGS. 4A-4B , the outer housing  131  may include a base structure  308  and cap structure  304  in addition to the cylindrical outer housing  302 . As shown, the base structure  308  may surround a lower portion of the hollow cylindrical inner housing  333  of the conduit assembly  133 , such that a first opening  333 A of the hollow cylindrical inner housing  333  defines the inlet port  132  of the vaporizer assembly  130 . Additionally, the base structure  308  may enclose a lower end of the annular space  335  between the cylindrical outer housing  302  and the hollow cylindrical inner housing  333  to thus at least partially define the annular space  335 . As further shown, the cap structure  304  may cover at least an upper end of the annular space  335  and may further cover at least a portion of the second opening  333 B of the hollow cylindrical inner housing  333 , such that a portion of the cap structure  304  both at least partially defines the annular space  335  and defines the outlet port  142  of the vaporizer assembly  130 . As shown, the cap structure  304  may include a gasket structure  306  that defines the outlet port  142 . 
       FIG. 5  is a cross-sectional view of a vaporizer assembly according to some example embodiments. 
     As shown in  FIG. 5 , in some example embodiments, a dispensing interface assembly  150  that includes a first dispensing interface  150 - 1  extending through the conduit assembly  133  and coupled to the heating element  136  within the conduit assembly  133  such that the first dispensing interface  150 - 1  is in direct fluid communication with the conduit assembly  133  and the heating element  136 , and further includes a second dispensing interface  150 - 2  at least partially exposed to an exterior of the vaporizer assembly  130  and isolated from direct fluid communication with the heating element  136  by the first dispensing interface  150 - 1 , may further include one or more additional dispensing interfaces  150 - 3  interposing between the first and second dispensing interfaces  150 - 1 ,  150 - 2 . As a result, the one or more additional dispensing interfaces  150 - 3  may be directly coupled to both the first and second dispensing interfaces  150 - 1 ,  150 - 2 . The first and second dispensing interfaces  150 - 1 ,  150 - 2  may be isolated from direct contact with each other by the one or more additional dispensing interfaces  150 - 3 . The one or more additional dispensing interfaces  150 - 3  may enable fluid communication between the first and second dispensing interfaces  150 - 1 ,  150 - 2 . In some example embodiments, pre-vapor formulation drawn into the second dispensing interface  150 - 2  via one or more ports  302 P may be further drawn from the second dispensing interface  150 - 2  and into the first dispensing interface  150 - 1  via the one or more additional dispensing interfaces  150 - 3 . The one or more additional dispensing interfaces  150 - 3  may include one or more instances of one or more different wicking materials than either of the first or second dispensing interfaces  150 - 1 ,  150 - 2  and the one or more different wicking materials may have different capacities to draw pre-vapor formulation than one or more of the wicking material(s) of the first and second dispensing interfaces  150 - 1 ,  150 - 2 . 
       FIG. 6A  is a perspective view of a vaporizer assembly according to some example embodiments.  FIG. 6B  is a perspective view of the vaporizer assembly of  FIG. 6A  according to some example embodiments.  FIG. 6C  is a cross-sectional view along line VIC-VIC′ of the vaporizer assembly of  FIG. 6B  according to some example embodiments.  FIG. 7A  is a side view of an e-vaping device according to some example embodiments.  FIG. 7B  is a side view of the e-vaping device of  FIG. 7A  according to some example embodiments.  FIG. 7C  is a cross-sectional view along line VIIC-VIIC′ of the e-vaping device of  FIG. 7A  according to some example embodiments. 
     As shown in  FIGS. 6A-6C  and  FIGS. 7A-7C , hollow cylindrical inner housing  333  of the conduit assembly  133  may include one or more slot structures  602  into which the first dispensing interface  150 - 1  may be received and held in place. In the example embodiments shown in  FIGS. 6A-6C , the hollow cylindrical inner housing  333  includes two slot structures  602  extending through opposite sides of the hollow cylindrical inner housing  333 . It will be understood that the hollow cylindrical inner housing  333  may include one slot structure  602 . It will be understood that the hollow cylindrical inner housing  333  may include more than two slot structures  602 . As shown in at least  FIG. 6C , the first dispensing interface  150 - 1  may extend through, and may be structurally supported in place by, opposing slot structures  602  at opposite sides of the hollow cylindrical inner housing  333 . In some example embodiments, a width W 1  of each slot structure  602  is less than a diameter of the first dispensing interface  150 - 1 , such that a portion of the first dispensing interface  150 - 1  extending through a slot structure  602  is at least partially compressed by the slot structure  602  to cause the first dispensing interface  150 - 1  to be held in place by the slot structure  602 . In some example embodiments, the first portion  150 - 1 A of the first dispensing interface  150 - 1  is understood to be a portion of the first dispensing interface  150 - 1  that extends through conduit  193  between opposing slot structures  602  on opposite sides of the hollow cylindrical inner housing  333  of the conduit assembly  133 , and the second portions  150 - 1 B of the first dispensing interface  150 - 1  may be understood to be the portions of the first dispensing interface  150 - 1  that extend beyond the slot structures  602  and out of the hollow cylindrical inner housing  333  and into the annular space  335  that extends between the hollow cylindrical inner housing  333  and the cylindrical outer housing  302 . 
     In some example embodiments, including the example embodiments shown in  FIGS. 6A-6C , the hollow cylindrical inner housing  333  and the connector assembly  138  may form part of the same unitary piece of material. In some example embodiments, the hollow cylindrical inner housing  333  and the connector assembly  138  may be two separate elements that can be connected together. In some example embodiments, the hollow cylindrical inner housing  333 , the connector assembly  138 , and the base structure  308  may form part of the same unitary piece of material. 
     Still referring to  FIGS. 6A-6C  and  FIGS. 7A-7C , in some example embodiments, the second dispensing interface  150 - 2  may be directly exposed to conduit  193  through the portions of the slot structures  602  that are not occupied by the first dispensing interface  150 - 1 . However, as shown in  FIGS. 6C and 7C , in some example embodiments, the portions of the second dispensing interface  150 - 2  that are directly exposed to the conduit  193  through the slot structures  602  may be sufficiently distant from the heating element  136  to be isolated from being in direct fluid communication with the heating element  136  by the interposing space of the conduit  193  and slot structures between the exposed second dispensing interface  150 - 2  and the heating element  136 , and the second dispensing interface is further isolated from direct fluid communication with the heating element  136  by the first dispensing interface  150 - 1 . 
     Still referring to  FIGS. 6A-6C  and  FIGS. 7A-7C , in some example embodiments, the inlet port  132  is at least partially defined by a channel structure  604  that extends into the conduit  193  defined by the hollow cylindrical inner housing  333  of the conduit assembly  133  and extends through the hollow gasket  609  shown in  FIG. 6C . As shown in  FIG. 6C  the channel structure  604  may be coupled to the hollow cylindrical inner housing  333  through the hollow gasket  609 . The diameter of the inlet port  132  may be less than the diameter of the conduit  193 . As shown in  FIG. 6C , the channel structure  604  may be coupled to the heating element  136  via one or more electrical leads  606 - 1 ,  606 - 2 , such that the channel structure  604  may be configured to at least partially enable an electrical coupling between the heating element  136  and a power supply  122  of the power supply assembly  120  when the vapor generator assembly  110  in which the vaporizer assembly  130  is included is coupled to the power supply assembly  120 . 
     While a number of example embodiments have been disclosed herein, it should be understood that other variations may be possible. Such variations are not to be regarded as a departure from the spirit and scope of the present disclosure, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.