Patent Publication Number: US-11029128-B2

Title: Active cooling for holster

Description:
PRIORITY CLAIM AND CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit under 35 U.S.C. § 119(e)(1) of U.S. Provisional Application No. 62/551,413, filed Aug. 29, 2017, which is hereby incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     Implements, such as tools, weapons, and the like, may be temporarily encased in a carrier (such as a holster, for instance) for protection of the implement and/or the user, while providing access to the implement. For example, a carrier may allow a user to conveniently carry the implement, safely retaining the implement until needed. When the implement is to be used, the user may withdraw the implement from the carrier, and then return it to the carrier when finished. In some cases, such as with a handgun for example, the holster may allow the user to conceal the implement, or to conceal the fact that the user is carrying the implement. 
     In the case of a handgun, the holster should reasonably protect the handgun and the user, and should be convenient to the user for ready use. However, the holster should also be versatile enough to be comfortably carried by the user, such as when it is worn on the person of the user for an extended length of time. The holster should also be rigid and stable enough to allow the handgun to be repeatedly drawn and re-holstered, usually with the same hand. 
     Wearing a holster on the user&#39;s body, particularly for an extended length of time can become uncomfortable for the user if doing so generates or localizes heat felt by the user. In some cases, a holster next to the user&#39;s body traps the user&#39;s body heat at the location of the holster, causing increased perspiration and potentially causing discomfort to the user. It can be difficult for the perspiration to evaporate due to the proximity of the holster. Consequently, it can be difficult to cool the user without removing the holster. 
     Also, a handgun can generate a certain amount of heat with use, and can generate considerable heat when used repeatedly, such as during shooting competitions and the like. With many holsters, the heat generated by the handgun may be transferred to the user, making the holster and the handgun uncomfortable to wear against the user&#39;s body. This can be especially problematic with many conceal carry holsters, which generally rest closer to the user&#39;s body, if not resting directly in contact with the user&#39;s body. In many cases, the heat generated by the handgun is in addition to the user&#39;s body heat at the holster location. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The detailed description is set forth with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different figures indicates similar or identical items. 
       For this discussion, the devices and systems illustrated in the figures are shown as having a multiplicity of components. Various implementations of devices and/or systems, as described herein, may include fewer components and remain within the scope of the disclosure. Alternately, other implementations of devices and/or systems may include additional components, or various combinations of the described components, and remain within the scope of the disclosure. Shapes and/or dimensions shown in the illustrations of the figures are for example, and other shapes and or dimensions may be used and remain within the scope of the disclosure, unless specified otherwise. 
         FIG. 1  shows a front perspective view of an example holster with a cooling system, according to an implementation. 
         FIG. 2  shows a bottom perspective view of an example holster with a cooling system, according to an implementation. 
         FIG. 3  shows a top perspective view of an example holster with a cooling system, according to an implementation. 
         FIG. 4  shows a side perspective view of an example holster with a cooling system, according to an implementation. 
         FIG. 5  shows a back perspective view of an example holster with a cooling system, according to an implementation. 
         FIG. 6  shows another side perspective view of an example holster with a cooling system, according to an implementation. 
         FIGS. 7-9  show exploded views of an example holster with a cooling system, according to an implementation. 
         FIGS. 10-12  show front, back, and side perspective views, respectively, of an example cooling assembly for a holster, according to an implementation. 
         FIG. 13  shows a front view of an example holster with a cooling system, according to another implementation. 
         FIG. 14  shows a top perspective view of an example holster with a cooling system, according to the other implementation. 
         FIG. 15  shows a back view of an example holster with a cooling system, according to the other implementation. 
         FIG. 16  shows a back perspective view of an example holster with a cooling system, according to the other implementation. 
         FIG. 17  shows an exploded view of an example holster with a cooling system, according to the other implementation. 
         FIGS. 18-21  show a front perspective view, a back view, and two back perspective views, respectively, of an example cooling assembly for a holster, according to another implementation. 
         FIG. 22  shows an exploded view of an example cooling assembly for a holster, according to the other implementation. 
         FIG. 23  shows a front view of an example holster with a cooling system, according to a further implementation. 
         FIG. 24  shows a bottom perspective view of an example holster with a cooling system, according to the further implementation. 
         FIG. 25  shows a front view of an example holster with a cooling system, according to an additional implementation. 
         FIG. 26  shows a top perspective view of an example holster with a cooling system, according to the additional implementation. 
         FIG. 27  shows a front perspective view of an example holster with a cooling system, according to the additional implementation. 
         FIG. 28  shows an exploded view of an example holster with a cooling system, according to the additional implementation. 
         FIG. 29  shows another exploded view of an example holster with a cooling system, according to the additional implementation. 
         FIGS. 30 and 31  illustrate two example circuits for a holster with a cooling system, according to an implementation. 
         FIG. 32  is a flow diagram illustrating an example process of cooling a holster with a cooling system, according to an implementation 
     
    
    
     DETAILED DESCRIPTION 
     Overview 
     Representative implementations of devices and techniques provide a cooling system for an implement holster (such as a handgun holster, for example). In various embodiments, the cooling system provides fluid flow through at least a portion of the holster to cool the holster and the user. For example, the fluid flow of the cooling system can help to evaporate perspiration from the user in the area of the holster, and to conduct heat away from the holster and the handgun. 
     In various embodiments, the cooling system includes a multi-layered backer having two or more uniquely arranged layers. In the embodiments, one or more of the layers of the backer are arranged to conduct the flow of a fluid (air, gas, liquid, etc.) through the backer and through one or more portions of the holster. For instance, one or more layers of the backer (i.e., a ducting layer) may include duct, conduit, tubing, directional features, fins, channels, or other features or components arranged and adapted to conduct the flow of fluid. 
     In some embodiments, the backer of the cooling system includes one or more layers arranged to be placed on or near the body of the user to conduct the cooling effects of the cooling system to the user. For instance, in one example, the backer includes a perforated or otherwise breathable layer that is arranged to be nearest to the user&#39;s body. In an embodiment, the breathable layer conducts air (or the like) onto the body of the user from the ducting layer. For instance, the breathable layer may be directly or indirectly coupled to the ducting layer. The movement of air on the user&#39;s body works to evaporate moisture on the user&#39;s body, cooling the user at the location of the holster. 
     In various embodiments, the cooling system includes a cooling assembly comprising one or more fans, pumps, blowers, or the like, adapted to move fluid through the ducting layer. In the embodiments, the cooling assembly pulls or pushes the fluid through the ducting layer, from one or more sources of the fluid (or inputs) to one or more outputs. In one example, the outputs comprise perforations, openings, spaces, or the like, in the breathable layer. In other examples, the outputs comprise other cooling dispersal components. 
     In some implementations, the cooling system may be powered by an internal and/or external direct current (DC) power supply. In other implementations, the cooling system may be partly or fully powered by other sources, including solar power, compressed gas, sublimation, or the like. 
     In various embodiments, the cooling system is integral to a holster or other carrier. For example, the multi-layer backer comprises the backer for a cooled holster system. In one example, the cooling system, including the multi-layer backer, may be adapted to be interchangeably coupled to various implement holsters or holster shells (or the like) for cooling a user in the area that the holster (or the backer) is pressing against the body of the user. For example, the cooling system may be a modular system adaptable to many and various carriers and carrier applications (such as various handgun holsters, and the like, for example). 
     In an example implementation, the cooling system can be installed and removed from a holster, or interchanged by a user as desired, to add cooling to a holster (such as a hybrid holster as shown in  FIG. 1 , or another style of holster). For example the backer of a holster may be exchanged for the multi-layer backer and integrated cooling system as described herein. In other implementations, the cooling system, including the backer, may be a permanent part of the holster (or other carrier). 
     Techniques and devices are discussed with reference to example handgun holsters illustrated in the figures. However, this is not intended to be limiting, and is for ease of discussion and illustrative convenience. The techniques and devices discussed may be applied to a holster or to any of various cases, carriers, sheaths, containers, implements, tools, tool belts, objects, and the like, and remain within the scope of the disclosure. For the purposes of this disclosure, the generic term “carrier” is used to indicate any or all of the above. 
     Additionally, the techniques and devices are discussed and illustrated generally with reference to an inside waistband (IWB) style holster. This is also not intended to be limiting. In various implementations, the techniques and devices may be employed with outside waistband (OWB) holsters, as well as holsters worn at the back, chest, side, thigh, or ankle of a user, holsters carried in a bag, purse, or pocket, or carried or worn on a belt, a strap, or in any other manner (e.g., attached to a vehicle, an object of furniture, another object, etc.). In alternate implementations, the techniques and devices may be employed in other ways or with other devices, systems, instruments, or the like. 
     Further, the shape and quantity of the cooling system components illustrated in the figures may vary to accommodate various applications. In alternate embodiments, fewer, additional, or alternate components may be used and/or combined to form a cooling system or a cooled holster system having an equivalent function and operation. 
     Implementations are explained in more detail below using a plurality of examples. Although various implementations and examples are discussed here and below, further implementations and examples may be possible by combining the features and elements of individual implementations and examples. 
     EXAMPLE EMBODIMENTS 
       FIGS. 1-29  illustrate example embodiments of a cooling system  100  for a carrier  102  (such as a handgun holster, for example), in various non-limiting configurations. The illustrations of the components of the cooling system  100  and the carrier  102  as shown in  FIGS. 1-29  are not intended to be restrictive, and the components may have other shapes, dimensions, orientations, and so forth, while performing the functions (or equivalent functions) described herein, and without departing from the scope of the disclosure. 
       FIGS. 1-6  show various views of a carrier  102  with a cooling system  100 , according to an implementation. When combined, the cooling system  100  and the carrier  102  comprise an actively cooled holster  104 . In the illustrated example, the carrier  102  comprises a holster shell, or the like, adapted to carry an implement (such as a handgun, for example). In various other examples, the carrier  102  may comprise any of various cases, sheaths, containers, enclosures, tool belts, and the like. The carrier  102  may be removably or permanently coupled to a backer  106 , for instance, adapted to support the carrier  102 . In some examples, the backer  106  and the carrier  102  combine to encase the implement. For instance, the backer  106  and the carrier  102  may be removably or permanently coupled together, and form an enclosure for the implement when coupled. In other examples, the carrier  102  may form an enclosure, which is coupled to the backer  106 . One or more clips  108  (or the like) may be coupled to the backer  106  or to the carrier  102  to suspend the carrier  102  from a belt, or other support object. 
     As shown in  FIGS. 1-6 , at least a portion of the cooling system  100  can be coupled to or integrated into the backer  106 . For example, the backer  106  may be comprised of multiple layers, and one or more of the layers may be part of the cooling system  100 . In an embodiment, the one or more layers comprising the cooling system  100  include a ducting layer  110  and a breathable layer  112 . In another embodiment, the backer  106  also includes a load bearing surface layer  114 . For instance, the multiple layers of the backer  106  may include one or more layers  110  and  112  arranged to provide cooling to the user, combined with one or more layers  114  arranged to provide a suitable backer surface for the carrier  102 . In alternate embodiments, one of the layers  110  and  112  may also function as a layer  114 , or in other words, a suitable load-bearing surface for the carrier  102 . In other embodiments, other layers may also be part of the backer  106  and/or the cooling system  100 . 
       FIGS. 7-9  show exploded views of the example actively cooled holster  104 , including the cooling system  100  and the carrier  102 , according to an implementation. As shown in  FIG. 7 , the carrier  102  can be removably or permanently coupled to the multi-layer backer  106  via one or more backer latch attachments  116 . One or more removable or permanent fasteners  702  may also be used to couple the carrier  102  to the backer  106  and/or to couple the backer latch attachment  116  to the backer  106 . The backer latch attachment  116  may include one or more features, locks, clasps, or the like, adapted to couple the carrier  102  to the backer  106 . As shown in  FIG. 8 , the backer latch attachment  116  may also be used to couple parts of the cooling system  100  to the backer  106 , such as the cooling assembly  118 , for example. 
     As also shown in  FIG. 8 , in some embodiments, an adjustable clip receiver  802  can be used with one or more layers of the backer  106  to adjustably couple the clips  108  to the backer. In some examples, the adjustable clip receiver  802  may protrude through all of the layers ( 114 ,  110 ,  112 , etc.) of the backer  106  to attach to the clips  108 . In other examples, the adjustable clip receiver  802  may be sandwiched between two layers, and protrude out the first layer  114  to attach to the clips  108 . Each adjustable clip receiver  802  can have multiple attachment points for attaching each of the clips  108  at one of multiple positions onto the backer  106 , for customizing a ride height and cant of the holster system  104 . In some embodiments, the adjustable clip receiver  802  is a tool-less attachment component for ease of clip removal, installation, and adjustment. 
     Referring to  FIGS. 1-9 , in an embodiment, the backer  106  may include a first layer  114  (surface layer  114 ) comprising a tough supporting material arranged to be in contact with the implement (such as a firearm) or nearest to the implement. This first layer  114  may be comprised of a natural or synthetic leather material, a plastic material, or the like, with desired stiffness and durability. The first layer  114  may also include one or more openings  704  arranged to allow fluid to pass through the first layer  114  and through to the inner layers (e.g.,  110 ,  112 , etc.) of the backer  106 , as described below. For example, the one or more openings  704  may align with a portion of a feature, channel, duct, etc. or with one or more inlet/outlets associated with the ducting layer  110  described below. In an embodiment, one or more openings  704  in the first layer  114  may comprise an inlet or an outlet, as described below. 
     In an embodiment of a cooling system  100 , the backer  106  includes a ducting layer  110 , having one or more features  902  such as channels, duct, conduit, tubing, directional features, fins, or other features or components arranged and adapted to conduct the flow of fluid (see  FIG. 9 , for example). For example, directional features may include tabs, slots, grooves, walls, ridges, and so forth that can affect the direction of fluid travel within the ducting layer  110 . The features  902  may be formed on or within the ducting layer  110 , or be coupled to the ducting layer  110 , to provide one or more passages for the movement of fluid, as desired for cooling. 
     In various examples, the ducting layer  110  may be comprised of non-breathable neoprene, a high-density compression resistant flexible foam, one or more polymers, composites, or other suitable materials. Thus, the ducting layer  110  may be impermeable to fluids and be arranged to provide a leak resistant or leak proof conduit for fluid movement. Alternately, the ducting layer  110  may be comprised of a breathable neoprene, a lower density foam, or permeable polymer or other material, and may be adapted to leak fluid at a predetermined rate as the fluid moves through the features  902 . For instance, the fluid leakage may be a part of fluid dispersion for cooling. 
     In an embodiment, as shown in  FIGS. 8 and 9 , the ducting layer  110  may include an opening  804  to allow fluid to pass from the opening  704  of the first layer  114  through the ducting layer  110  and to the features  902  (and/or the breathable layer  112 ) on the opposite side (the breathable layer  112  side) of the ducting layer  110 . In various embodiments, the opening  804  may be aligned to the opening  704 , or the openings  804  and  704  may be joined by features, channel, conduit, duct, or the like (which may be integrated into one or more of the layers  110  and  114  or may be separate components). 
     The features  902  in the ducting layer  110  can be arranged to cover much of the area of the backer  106 , to provide the cooling desired over the area of the backer  106  desired (see  FIG. 9 , for example). The features  902  may be arranged in one or more patterns or groups, to direct the flow of fluid through the ducting layer  110 . The ducting layer  110  may include at least one inlet and at least one outlet connected to the features  902  to allow fluid to circulate through the features  902 . In some embodiments, the ducting layer  110  includes multiple inlets and multiple outlets connected to the features  902 . In other embodiments, the inlets and/or outlets are included on one or more other layers (e.g., layers  112  and  114 ), which are coupled to the features  902  of the ducting layer  110 . 
     In an example, fluid (such as air, for example) can flow into one or more of the inlets, through the features  902 , and out of one or more of the outlets to provide cooling through fluid movement. The fluid movement can assist with evaporation of the user&#39;s perspiration, for example, providing cooling to the user. In some embodiments, the ducting layer  110  can include multiple features  902  and/or multiple inlet/outlets. In an alternate implementation, the inlets and outlets are interchangeable—that is, the fluid can move in either direction. 
     In an implementation, the ducting layer  110  may be arranged to be accessed by a user, using fasteners, such as hook and loop fasteners, snaps, zip-type seals, or the like. The user may disassemble the backer  106 , by separating one or more of the layers  110 ,  112 ,  114  for cleaning, or the like. 
     Referring to  FIGS. 1-9 , in an embodiment of a cooling system  100 , the breathable layer  112  of the backer  106  includes a breathable mesh or like fabric disposed over the ducting layer  110  and positioned next to the user&#39;s body. The breathable layer  112  allows the effects of the fluid flow through the ducting layer  110  to be felt by the user, cooling the user and assisting in evaporating perspiration on the user&#39;s body. In various examples, the breathable layer  112  comprises a 3D mesh, a 3D spacer fabric, or other breathable fabric or materials. The breathable layer  112  may be arranged to have a desired thickness to optimize comfort and cooling capability. 
     Referring to  FIGS. 2-9 , in an embodiment, multiple openings  202  are disposed throughout the breathable layer  112 . The openings  202  may comprise formed or naturally occurring holes, apertures, or perforations in the breathable layer  112 , spaces in the weave of the fabric of the breathable layer  112 , slots or channels in the breathable layer  112 , or any other formation that may be used to pass fluid for cooling. 
     The multiple openings  202  may comprise outlets for fluid flow from the ducting layer  110 . For instance, in one example, the breathable layer  112  allows air from the ducting layer  110  to pass through the openings  202  of the breathable layer  112 . The openings  202  may be coupled to individual features  902  or groups of features  902 , to form an exit for fluid traveling within the ducting layer  110 . Alternately, the openings  202  may not be coupled directly to any features  902 . Rather, the breathable layer  112  can be coupled to the ducting layer  110 , so that the fluid moving through the features  902  can escape through any of the openings  202 . In such an embodiment, the ducting layer  110  may be sealed to the breathable layer  112  if desired, around a perimeter of the layers  110  and  112 , on the features  902 , or at some other convenient location on the layers  110  and  112  (e.g., at one or more boundaries, at designated features  902 , or the like). 
     Referring to  FIGS. 1, 3, and 7-10 , in various implementations, the cooling system  100  includes a cooling assembly  118 . To assist in the movement of fluid, the cooling assembly  118  can include one or more fans, pumps, blowers, (combinations of fans, pumps, and blowers) or other components adapted to move fluid through the ducting layer  110 . In an embodiment, the cooling assembly  118  can be incorporated at some point along the features  902  of the ducting layer  110 , or at one of the inlet/outlets. The cooling assembly  118  can pull or push fluid through the features  902  of the ducting layer  110  to create or increase the flow of fluid through the ducting layer  110  and the outlets (such as openings  202 , for example). In various examples, the cooling assembly  118  can run forwards or backwards, at one or more speeds, as determined by the user, preset or automatic controls, or the like. 
     In an implementation, as shown in  FIGS. 1, 3, and 7-9 , the cooling assembly  118  can be coupled to the backer  106  over the opening  704  in the first layer  114 . In the implementation, a portion  1102  of the cooling assembly  118  may protrude through one or both of the openings  704  and  804  in the first layer  114  and the ducting layer  110 , respectively, of the backer  106 . For instance, as shown in  FIGS. 10-12 , the fan, pump, blower, or the like, of the cooling assembly  118  may be housed in a portion  1102  of the cooling assembly  118 , which may be shaped to fit within the openings  704  and  804 , and may include one or more openings for fluid flow. The enclosure of the cooling assembly  118  may also include a duct or channel  1104  for drawing in air (or other fluid) or exhausting air, depending on the direction of fluid flow. The fan, pump, blower, or the like, of the cooling assembly  118  can be located near to the channel  1104  for efficiently moving the fluid through the channel  1104  and into or out of the backer  106 . 
     For instance, as shown in  FIGS. 7-9 , the backer  106  includes the first layer  114  on an outer surface of the backer  106  next to the implement, a breathable layer  112  on another outer surface of the backer  106  next to the user, and a ducting layer  110  sandwiched between the first layer  114  and the breathable layer  112 . 
     In an implementation, the cooling assembly  118  can pull air from the environment and force the air into the ducting layer  110  through the opening  704  in the first layer  114 . The air circulates through the ducting layer  110  as directed or channeled by the features  902 , and exits through the openings  202  in the breathable layer  112  (or through the fabric of the breathable layer  112 ). In an alternate implementation, the cooling assembly  118  can pull air through the openings  202  in the breathable layer  112 , through the features  902  of the ducting layer  110 , and out the first layer  114 , through the opening  704 . In either case, the air flow at the breathable layer  112  next to the user&#39;s body, cools the user&#39;s body at the location of the backer  106 . 
     In various embodiments, the cooling assembly  118  may be powered by a small direct current (DC) power supply, or the like, which may be internal to the cooling assembly  118 , mounted on the backer  106  or carrier  102 , or externally mounted or carried. Other power supply options may be used depending on the battery capability needed for a particular outing, for example. In some cases, solar cells may be mounted to the backer  106 , the carrier  102 , or another surface to assist in powering and/or charging the cooling assembly  118 . 
     Additionally, various battery charging systems can also be incorporated within the cooling assembly  118 , within one or more of the layers ( 110 ,  112 ,  114 , for example), or the like. Some examples include a battery charging port  706 , an induction coil for wireless charging, a solar collector, or the like. 
     In some implementations, the cooling assembly  118  may be manually switched on and off via a switch  120  on the housing of the cooling assembly  118 . In another implementation, the cooling assembly  118  may be automatically switched on and off. In some cases, for instance, one or more temperature and/or humidity sensors (not shown) can be included with the cooling assembly  118  or mounted to one or more of the layers ( 110 ,  112 ,  114 , for example) to trigger the operation of the cooling assembly  118  as desired. For instance, a control component (such as a switch, potentiometer, logic control, or the like) may be set manually or have a predetermined set point (temperature setting, humidity threshold, etc.) for automatically switching the cooling assembly  118  on and off based on information received from one or more temperature and/or humidity sensors. This may help to preserve battery life. 
     As shown in  FIGS. 8 and 9 , one or more additional layers may also be included with the multi-layer backer  106 . Additional layers may include a rigidity layer  806  or member, a protective layer, or the like. The rigidity layer  806  may include a partial or full layer comprised of a metal, a metal alloy, fiberglass, plastic, a composite, an aramid, carbon fiber, or other stiff material, arranged to provide a desired stiffness to the backer  106 . If present, the rigidity layer  806  may include one or more openings (such as opening  2806 , shown at  FIG. 28 , for example) that align with one or more portions of the first layer  114 , the ducting layer  110 , or the inlet/outlets associated with the features  902  and/or the ducting layer  110 . 
       FIGS. 13-17  show various views of a carrier  102  with a cooling system  100  (an actively cooled holster  104 ), according to another embodiment. In the illustrated example, the arrangement of the cooling system  100  is somewhat different, however the functionality is consistent with the discussion above. Accordingly, the components of a cooling system  100  or an actively cooled holster  104  may be arranged in various configurations and remain within the scope of the disclosure. 
     As shown in  FIG. 17 , the arrangement of the features  902  of the ducting layer  110  may include any pattern or group of patterns for the desired fluid flow. In an embodiment, as shown in  FIG. 17 , the opening  804  in the ducting layer  110  may be partially (or fully) bordered by features  902  to assist in directing the fluid flow from (or to) the cooling assembly  118 . One or more attachment clips  1702 , or the like, may be used to assist in coupling the cooling assembly  118  to one or more of the layers ( 114 ,  110 ,  112 , etc.) of the backer  106 . For instance, the attachment clip(s)  1702  can be fixed to a layer, and the cooling assembly  118  can be pressed into the attachment clip(s)  1702  to hold the cooling assembly  118  in place during use. The cooling assembly  118  may be removed (unclipped) from the attachment clip(s)  1702  as desired for cleaning, to replace batteries, or the like, by pulling the cooling assembly  118  from the attachment clip(s)  1702 . 
       FIGS. 18-22  show an example cooling assembly  118  according to another embodiment. As discussed above, the example cooling assembly  118  of  FIGS. 18-22  includes a power button  120  and a charging port  706 . Also, the cooling assembly  118  includes a protruding portion  1102  that houses the fan, blower, pump, etc., adapted to move fluid through the cooling system  100 . 
     As shown in  FIGS. 18 and 21 , in the embodiment, the portion  1102  includes an opening  1802 , which can be used as an output for the fan, blower, pump, etc., or an input, depending on the direction of fluid flow. In the embodiment, the opening  1802  is inserted into the opening  804  of the ducting layer  110 , through the opening  704  in the first layer  110 . This allows the opening  1802  to interface with the features  902  of the ducting layer  110 , and to push fluid through the features  902  (or pull fluid). 
       FIG. 22  shows an exploded view of the example cooling assembly  118 , and illustrates example components, according to the implementation. For instance, the example cooling assembly  118  includes a cover  2202 , dampening material  2204 , one or more batteries  2206 , a divider  2208 , a control board  2210 , a base  2212 , and one or more blowers  2214  within the portion  1102 . In the example, the control board  2210  determines the operation of the blower(s)  2214  (power, speed, and direction of operation, for example) based on the position of the switch  120 , and may also determine the operation of the blower(s)  2214  based on signals from one or more temperature and/or humidity sensors, as discussed above. In some implementations, the one or more temperature and/or humidity sensors are located within the cooling assembly  118 , and in other implementations, they are located at other places on the backer  106 , or the like, and are in communication with the control board  2210 . 
     In alternate implementations, a cooling assembly  118  may include fewer components, additional components, or alternate components, and provide an equivalent function. For example, rather than blower(s)  2214 , the mover for the cooling assembly  118  may comprise one or more fans, pumps, a compressed gas unit, or the like. Further, the components of the cooling assembly  118  may have different shapes, sizes, or arrangements, and remain within the scope of the disclosure. 
       FIGS. 23 and 24  show various views of a carrier  102  with a cooling system  100  (an actively cooled holster  104 ), according to another embodiment. In the illustrated example, the arrangement of the cooling system  100  is somewhat different, however the functionality is consistent with the discussion above. Accordingly, the components of a cooling system  100  or an actively cooled holster  104  may be arranged in various configurations and remain within the scope of the disclosure. 
       FIGS. 25-29  show various views of a carrier  102  with a cooling system  100  (an actively cooled holster  104 ), according to a further embodiment. In the illustrated example, the cooling assembly  118  is mounted within the layers of the backer  106 , rather than on the surface of the first layer  114  of the backer  106 . In the example embodiment shown, the power supply (not shown) for the cooling assembly  118  may be located remotely from the holster  104 , or it may be located (or mounted) at various locations on the holster  104  or on the user, by design or at the user&#39;s discretion. 
     As shown in  FIGS. 25-29 , the opening  704  in the first layer  114  may be exposed to the environment at the front of the backer  106 . In the embodiment, the cooling assembly  118  is located between the breathable layer  112  and the ducting layer  110  (and may be mounted to one or both layers). The cooling assembly  118  protrudes through the opening  804  of the ducting layer  110 , and interfaces with the features  902 . As shown in  FIGS. 28 and 29 , the features  902  may comprise a channel or series of channels. 
       FIG. 28  illustrates an embodiment having one or more additional backer  106  layers. For instance, the backer  106  may include a rigidity layer  806  and a protective layer  2802  disposed between the first layer  114  and the breathable layer  112  as shown, and one or more other layers in some cases. In the embodiment, the cooling assembly  118  pulls air (or other fluid) from the opening  704  in the first layer  114 , through the opening  2806  in the rigidity layer  806  (if present), through the opening  2804  in the protective layer  2802  (if present), and through the features  902 , and out an outlet  2902 , which may be at the end of the features  902  in the ducting layer  110  (as shown in  FIG. 29 ) or may be at another location. Of course, the fluid flow is opposite when the cooling assembly  118  is running the opposite direction. 
     The expanded view of  FIG. 29  illustrates an embodiment with fewer layers, and so highlights the aspects of the example features  902  in greater detail. In various alternate embodiments, fewer layers, additional layers or alternate layers may be included with the backer, while providing the cooling functions desired. 
     The protective layer  2802  may be present to protect the ducting layer  110  from the rigidity layer  806 . This can help prevent the rigidity layer  806  from damaging the ducting layer  110 , which may be comprised of a much softer material. The protective layer  2802  may be comprised of a durable plastic or other material arranged to be thin but provide the desired protection. 
     One or more of the openings  704 ,  2806 ,  2804 , etc. may include a protective screen, or the like, to prevent objects from passing through the features  902  of the ducting layer  110  and from passing through the fan, blower, pump, etc. of the cooling assembly  118 . This can prevent objects from blocking the fluid flow through the ducting layer  110  and/or damaging the cooling assembly  118 . Protective screens may also be used at any or all of the inlets and outlets of the holster  104 . 
     In some alternate examples, other cooling techniques may be provided using additional or alternate layers, and further layers may be used for comfort, performance, or protection as desired. For instance, the cooling function may also be provided using forced evaporation (e.g., various forced air fans or ducting techniques), thermocouple heat transfer, circulating fluids other than air for cooling, inserting dry ice within the cooling assembly  118 , employing an endothermic chemical reaction, releasing pressurized or compressed gas (e.g., air, CO2, liquid nitrogen, etc.) from the cooling assembly  118 , including a miniaturized refrigeration system within the cooling assembly  118  and a closed system of features  902  in the ducting layer  110 , and the like. 
     Two example circuits are shown in  FIGS. 30 and 31  for control of the cooling system  100 . At  FIG. 30 , the simple circuit  3000  illustrated includes a manually and/or automatically activated switch  120  to power the cooling assembly  118  fan (or other powered cooling component). The battery  2206  may be internal to the cooling assembly  118 , the backer  106 , or holster  104 , or it may be externally mounted or carried. 
     At  FIG. 31 , the more complex circuit  3100  includes a voltage regulator  3102  to condition (change the voltage level, smooth the voltage characteristic, suppress transients or over-voltages, etc.) the power received from the battery  2206  (or other power source). The more complex circuit  3100  also includes a temperature/humidity sensor  3104  to send trigger signals to the control circuit  2210  based on preselected temperature and/or humidity settings. The control circuit  2210  then activates and deactivates one or more cooling components of the cooling assembly  118  (such as fan 1 and fan 2, for instance) for desired cooling, at least partially based on the signals received from the sensor  3104 . In another example, the control circuit  2210  may signal to increase the speed of one or more of the cooling components at predetermined incrementally higher temperature or humidity set points, and lower the speed of the cooling components at predetermined incrementally lower temperature or humidity set points. In alternate embodiments, other or additional circuit components may be used for the described functionality, and remain within the scope of the disclosure. 
     In various implementations, cooling system  100  devices may include additional or alternate components, or have different shapes or sizes than those illustrated. The cooling system  100  components disclosed herein have been illustrated to be used with handgun holsters and holster shells. However, the cooling system  100  components disclosed herein may also be used with the holders or cases of any tools or implements. 
     Although various implementations and examples are discussed herein, further implementations and examples may be possible by combining the features and elements of individual implementations and examples. 
     In various embodiments, the cooling system  100 , may be added to an existing arrangement (such as existing holsters and holster mounting apparatus and assemblies, for example). For instance, the existing arrangements may be retrofitted with the cooling system  100  or with cooling system  100  components. In other embodiments, the cooling system  100  may be a part of a new arrangement, such as a new holster  104 , case, enclosure, or the like. 
     Representative Process 
       FIG. 32  illustrates a representative process  3200  for implementing techniques and/or devices relative to providing cooling on a holster (such as the holster  104 , for example), according to various embodiments. The cooling may be provided by a cooling system (such as cooling system  100 , for example). The process  3200  includes incorporating the cooling system with a holster or retrofitting a holster (or other carrier) with the cooling system to form an actively cooled holster. The example process  3200  is described with reference to  FIGS. 1-31 . 
     The order in which the process is described is not intended to be construed as a limitation, and any number of the described process blocks can be combined in any order to implement the process, or alternate processes. Additionally, individual blocks may be deleted from the process without departing from the spirit and scope of the subject matter described herein. Furthermore, the process can be implemented in any suitable hardware, software, firmware, or a combination thereof, without departing from the scope of the subject matter described herein. 
     At block  3202 , the process includes providing a multi-layered backer (such as the backer  106 , for example) for an implement holster. The multi-layered backer may include any number of layers, and include the two layers described at blocks  3204  and  3206 . 
     At block  3204 , the process includes providing a ducting layer (such as the ducting layer  110 , for example) having one or more ducting features (such as the features  902 , for example) formed on or within the ducting layer. At block  3206 , the process includes providing a fluid permeable breathable layer (such as breathable layer  112 , for example) disposed over the ducting layer and the one or more ducting features. The breathable layer is disposed at a position intended to be nearest to a body of a user while the multi-layered backer is worn by the user. 
     At block  3208 , the process includes conducting a flow of fluid through the ducting layer using the one or more ducting features, as described above. At block  3210 , the process includes cooling the body of the user via the flow of fluid through the ducting layer. For instance, a flow of air from the ducting layer and passing through the breathable layer can cool the body of the user at the location of the backer, including evaporating moisture on the body of the user. In this example, the ducting features may comprise an open system to the environment, where air is pulled from the environment, passes through the ducting layer, and back out to the environment through the breathable layer (which may include one or more formed holes, or the like). 
     In another example, cooling fluids circulating within the ducting layer may cool the air around the ducting features. The cooled air can pass through the breathable layer to cool the body of the user. A fan, or the like, and/or one or more other features, may assist in moving the cooled air out through the breathable layer (which may include the formed holes, or the like). In the example, the ducting features with the cooling fluids may comprise a closed system. 
     In an implementation, the process includes providing a cooling assembly (such as the cooling assembly  118 , for example) adapted to move fluid through one or more of the layers of the multi-layered backer. In an embodiment, the process includes interfacing the cooling assembly to the ducting layer, and creating or increasing a flow of fluid through the ducting layer using the cooling assembly. 
     In one embodiment, the process includes pushing or pulling air from the environment and forcing the air through the ducting layer and out one or more openings in the breathable layer using the cooling assembly. In another embodiment, the cooling assembly moves the air in the opposite path. In other embodiments, the process includes moving other fluids (gasses, liquids, refrigerant, and so forth) through the ducting layer with the cooling assembly. 
     In an implementation, the process includes providing a first load bearing support layer (such as the first layer  114 , for example) to the multi-layered backer in a position nearest to where an implement is to be carried within the implement holster. In one example, a holster may be coupled to the load bearing support layer. 
     In other implementations, other layers may also be added to the multi-layer backer. For instance, a rigidity layer may be added, which may comprise a full or partial layer, and may be comprised of a metal, an alloy, a composite, or another material adapted to give strength and rigidity to the backer. In another example, one or more protective layers may also be added to the backer. 
     In an implementation, the process includes removably coupling a holster or a holster shell to the multi-layer backer to form the implement holster. The holster is worn with the breathable layer closest to the body of the user. 
     In alternate implementations, other techniques may be included in the process in various combinations, and remain within the scope of the disclosure. 
     CONCLUSION 
     Although the implementations of the disclosure have been described in language specific to structural features and/or methodological acts, it is to be understood that the implementations are not necessarily limited to the specific features or acts described. Rather, the specific features and acts are disclosed as representative forms of implementing the claims.