Patent Description:
The invention is a device, comprising a drain gun including a handle and a trigger, in accordance with claim <NUM>. Optional features of the invention are defined by the dependent claims.

Generally, this disclosure discloses various drain guns, accessories therefor, and methods of use and manufacture thereof. For example, a drain gun can include a handle and a trigger. The handle can include a channel and a plurality of inlets, which can include a plurality of check valves. The inlets, inclusive of the check valves, can feed the channel. The trigger can cause a staged release of a plurality of fluids from a plurality of cartridges to the channel from the inlets, inclusive of the check valves, when the cartridges are stored in the handle and feeding the inlets, inclusive of the check valves. As such, when a drain line is clogged, then the drain line can be unclogged via the drain gun. For example, the drain line can drain from an heating, ventilation, and air conditioning (HVAC) system, a refrigeration system, or others. For example, the drain line can conduct a condensate (e.g. water) resulting from at least some operations of the HVAC system, the refrigeration system, or others. Further, various hoses, accessories, and adapters are provided that can work with the drain gun and other hoses, accessories, tips, and adapters for unclogging the drain line. For example, some of these include an inflatable tip adapter, a tethered shuttle, an expanding-grip stepped plug, and a Venturi effect suction fitting. However, note that this disclosure may be embodied in many different forms and should not be construed as necessarily being limited to various embodiments disclosed herein. Rather, these embodiments are provided so that this disclosure is thorough and complete, and fully conveys various concepts of this disclosure to skilled artisans.

Note that various terminology used herein can imply direct or indirect, full or partial, temporary or permanent, action or inaction. For example, when an element is referred to as being "on," "connected," or "coupled" to another element, then the element can be directly on, connected, or coupled to another element or intervening elements can be present, including indirect or direct variants. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, then there are no intervening elements present.

As used herein, various singular forms "a," "an" and "the" are intended to include various plural forms as well, unless specific context clearly indicates otherwise.

As used herein, various presence verbs "comprises," "includes" or "comprising," "including" when used in this specification, specify a presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

<FIG> shows an embodiment of a drain gun according to this disclosure. In particular, a drain gun <NUM> includes a handle <NUM>, a trigger <NUM>, and a barrel <NUM>. The trigger <NUM> and the barrel <NUM> are coupled (e.g. assembled, fastened, mated, interlocked, unitary) to the handle <NUM>. The handle <NUM>, the trigger <NUM>, and the barrel <NUM> can include plastic, metal, rubber, or other materials. Although the handle <NUM>, the trigger <NUM>, and the barrel <NUM> are described relative to one lateral side (e.g. left side) of the drain gun <NUM>, note that any side (e.g. front, rear, left, right) of the drain gun <NUM> can be configured as disclosed herein.

The handle <NUM> (e.g. housing, case, frame) defines an opening <NUM> (e.g. closed-shape, open-shaped, symmetrical, asymmetrical, O-shaped, D-shaped, rectangle, square, oval, circle, triangle) through which a strap, a hook (e.g. belt hook), or a carabiner can extend. The handle <NUM> hosts a safety lock <NUM>, which is movable (e.g. laterally, longitudinally, pivotable, hinged, mated, fastened, interlocked) between an open position and a closed position, as further disclosed below. For example, the trigger <NUM> can be configured to not be able to be pressed when the safety lock <NUM> is in the closed position. For example, the safety lock <NUM> can be manually movable (e.g. user movable) or automatically movable between the open position and the closed position.

The handle <NUM> hosts a plate <NUM> defining a pair of openings for a plurality of displays <NUM>. The openings can be of any shape (e.g. symmetrical, asymmetrical, closed-shape, open-shaped, O-shape, D-shape, rectangle, square, oval, circle, triangle). Note that the openings are identical to each other in terms of type, shape, or structure. However, the openings can be non-identical to each other in terms of type, shape, or structure (and the handle <NUM> can be adapted for such variations). The displays <NUM> are analog, but can be digital (e.g. monochrome, color). For example, when the displays <NUM> are digital and when the handle <NUM> contains a battery, which can be rechargeable or replaceable, then the battery can power the displays <NUM>. The displays <NUM> can output a content, such as a binary content (e.g. black/white, red/green, <NUM>/<NUM>, full/empty) or a gradual content (e.g. counter, odometer, scale/range, red/yellow/green, full/half/empty), as further disclosed below. Note that the displays <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the displays <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations).

The handle <NUM> hosts a plurality of covers <NUM>, which can open and closed (e.g. pivot, slide, detach) as further disclosed below. The covers <NUM> include a plurality of openings <NUM>. The openings <NUM> are tapered in shape, but that shaping can vary (e.g. symmetric, asymmetric, closed-shape, open-shape, D-shape, O-shape, rectangle, square, oval, circle, triangle). The openings <NUM> can host a plurality of windows (e.g. transparent, translucent, glass, plastic) or nets/screens/meshes or avoid hosting the windows or nets/screens/meshes and thereby enabling direct access into the handle <NUM>. Note that the covers <NUM> can avoid the openings <NUM> as well. Note that the covers <NUM> are identical to each other in terms of type, shape, weight, or structure. However, the covers <NUM> can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations).

The handle <NUM> hosts a plurality of latches <NUM>. The latches <NUM> are configured to engage with the covers <NUM> when the covers <NUM> are closed (e.g. pivoted closed, slid closed, attached closed), as further disclosed below. Note that the latches <NUM> are identical to each other in terms of type, shape, weight, or structure. However, the latches <NUM> can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations). Note that although the handle <NUM> includes the latches <NUM>, there can be a single latch <NUM>.

The handle <NUM> stores a plurality of cartridges <NUM> dependent or independent of each other. For example, there can be two, three, four, five, six, seven, eight, nine, ten, or more of the cartridges <NUM> stored in the handle <NUM>. The cartridges <NUM> are visible through the openings <NUM>. The handle <NUM> stores the cartridges <NUM> sequentially side-by-side. However, handle <NUM> can store the cartridges <NUM> differently, such as a bundle of cartridges <NUM> forming any shape (e.g. circle, oval, square, rectangle, octagon, pentagon, star, crescent). Note that the handle <NUM> can also store a single cartridge <NUM>, whether or not the handle <NUM> is configured for storing at least two of the cartridges <NUM>. For example, the handle <NUM> can be configured to only receive and only store the single cartridge <NUM>.

The cartridges <NUM> can store a plurality of fluids (e.g. gas, liquid) under pressure. For example, the fluids can include a compressed gas (e.g. air, carbon dioxide, nitrogen, hydrogen), whether the compressed gas is flammable or non-flammable. For example, at least one of the cartridges <NUM> can be a disposable sixteen gram steel carbon dioxide cartridge. Note that although the cartridges <NUM> are identical, the cartridges <NUM> can also be non-identical to each other in terms of type, shape, weight, volume, texture, content, or structure (and the handle <NUM> can be adapted for such variations). Likewise, the fluids can be identical or non-identical to each other in terms of content, chemistry, type, pressure, color, temperature, volume, or other fluid characteristics (and the drain gun <NUM> can be adapted for such variations). Note that at least one of the cartridges <NUM> can store at least two fluids (e.g. at least two liquids, at least two gases, at least one liquid and at least one gas), whether identical or non-identical to each other in terms of content, chemistry, type, pressure, color, temperature, volume, or other fluid characteristics. In one mode of operation, the drain gun <NUM> provides a staged release of the fluids from the cartridges <NUM>, as activated via the trigger <NUM>, via the barrel <NUM>.

<FIG> shows an embodiment of a drain gun according to this disclosure. In particular, a drain gun <NUM> is similar to the drain gun <NUM>. However, there are some differences. The drain gun <NUM> includes a handle <NUM> defining a plurality of openings <NUM>. The openings <NUM> are dual direction tapered in shape, but that shaping can vary (e.g. symmetric, asymmetric, closed-shape, open-shaped, D-shape, O-shape, rectangle, square, oval, circle, triangle, single-direction tapered). Note that the openings <NUM> are identical to each other in terms of type, shape, or structure. However, the openings <NUM> can be non-identical to each other in terms of type, shape, or structure (and the handle <NUM> can be adapted for such variations). The openings <NUM> can host a plurality of windows (e.g. transparent, translucent, glass, plastic) or nets/screens/meshes or avoid hosting the windows or nets/screens/meshes and thereby enabling direct access into the handle <NUM>. Note that the handle <NUM> can avoid the openings <NUM>. Further, note that the windows or nets/screens/meshes are identical to each other in terms of type, shape, weight, or structure. However, the windows or nets/screens/meshes can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations).

The handle <NUM> hosts a safety lock <NUM> that is movable (e.g. longitudinally, laterally, pivotable, hinged, mated, fastened, interlocked) between an open position and a closed position. The handle <NUM> hosts a plate <NUM> defining a cavity <NUM> (e.g. closed-shaped, open-shaped, symmetrical, asymmetrical, O-shaped, D-shaped, rectangle, square, oval, circle, triangle) through which a fastener <NUM> (e.g. bolt, screw) secures the plate <NUM> to the handle <NUM>. However, note that the fastener <NUM> can be absent and the plate <NUM> is secured to the handle <NUM> in other ways (e.g. adhering, mating, interlocking, magnetizing).

The handle <NUM> hosts a plurality of caps <NUM> coupled (e.g. fastened, mated, snapped, interlocked) thereto. The caps <NUM> can include plastic, metal, or other materials. The caps <NUM> are externally grooved, bumped, or knurled for grip enhancement, but can be externally smooth. The caps <NUM> can be of any shape (e.g. tubular, cylinder, dome, cuboid, cube, hemisphere, pyramid, cone). Note that the caps <NUM> are identical to each other in terms of type, shape, weight, or structure. However, the caps <NUM> can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations).

<FIG> shows an embodiment of a trigger action of a drain gun according to this disclosure. In particular, the drain gun <NUM> (or the drain gun <NUM>) includes the handle <NUM> hosting a channel <NUM>, a plurality of inlets <NUM>, a plurality of check valves <NUM>, and a plurality of nozzles <NUM>.

The channel <NUM> is longitudinally rectilinear between the barrel <NUM> and the safety lock <NUM>, but can be longitudinally non-rectilinear (e.g. arcuate, sinusoidal). The channel <NUM> has a circular lateral cross-section, but can have a non-circular lateral cross-section (e.g. square, rectangle, oval, triangle). The channel <NUM> is a hollow tube (e.g. metal, plastic) extending within the handle <NUM>, but can be a hollow cavity defined within the handle <NUM>. The channel <NUM> can extend between the opening <NUM> and the cavity <NUM>.

The channel <NUM> has a front end portion (e.g. open) and a rear end portion (e.g. open). The front end portion of the channel <NUM> feeds the barrel <NUM> (e.g. fluid communication between the front end portion of the channel <NUM> and the barrel <NUM>). As such, at least some output from the front end portion of the channel <NUM> is directed to the barrel <NUM>. The rear end portion of the channel <NUM> is in proximity (e.g. within about <NUM> inches) of the safety lock <NUM>, which can operably engage therewith, as further disclosed below.

The inlets <NUM> are longitudinally rectilinear between the barrel <NUM> and the safety lock <NUM>, but can be longitudinally non-rectilinear (e.g. arcuate, sinusoidal). The inlets <NUM> have a circular lateral cross-section, but can have a non-circular lateral cross-section (e.g. square, rectangle, oval, triangle). Each of the inlets <NUM> is a hollow tube (e.g. metal, plastic, rubber) extending within the handle <NUM>, but can be a hollow cavity defined within the handle <NUM>. The cavity <NUM> can be positioned between the inlets <NUM>. The inlets <NUM> feed the channel <NUM> (e.g. fluid communication between the channel <NUM> and the inlets <NUM> between the front end portion of the channel <NUM> and the rear end portion of the channel <NUM>). For example, the inlets <NUM> and the channel <NUM> define a U-shape or a C-shape thereby, although other shapes are possible (e.g. J-shape, S-shape). As such, at least some output from the inlets <NUM> is directed to the channel <NUM> between the front end portion of the channel <NUM> and the rear end portion of the channel <NUM>. Note that the inlets <NUM> are identical to each other in terms of type, shape, weight, or structure. However, the inlets <NUM> can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations).

The inlets <NUM> can host (e.g. internally) the check valves <NUM> between the barrel <NUM> and the safety lock <NUM>. Each of the check valves <NUM> (e.g. one-way valve) allows a fluid (e.g. gas, liquid) to flow therethrough in only one direction. The check valves <NUM> can be two-port valves (e.g. two body openings - one for fluid to enter and one for fluid to exit). The check valves <NUM> can include plastic, metal, rubber, or other materials. The check valves <NUM> can include a ball check valve, a diaphragm check valve, a swing check valve, a stop check valve, a lift-check valve, an inline check valve, a duckbill valve, a pneumatic non-return valve, or other check valves. The check valves <NUM> can be configured to puncture or pierce the cartridges <NUM> (e.g. seal, cap, neck, top, sidewall) when the check valves <NUM> engage with the cartridges <NUM> via the nozzles <NUM>. For example, the check valves <NUM> can host needles (e.g. rectilinear, non-rectilinear) or blades (e.g. rectilinear, non-rectilinear) configured to puncture or pierce the cartridges <NUM> (e.g. seal, cap, neck, top, sidewall) when the check valves <NUM> engage with the cartridges <NUM> via the nozzles <NUM>. Note that the check valves <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the check valves <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations). The check valves <NUM> can operate independently of each other or dependently on each other. The check valves <NUM> (and the handle <NUM>) can allow independent loading of the cartridges <NUM>. Note that although the drain gun <NUM> (or the drain gun <NUM>) are described with the check valves <NUM>, the drain gun <NUM> (or the drain gun <NUM>) can employ non-check valves (e.g. flow control valve, bidirectional valves). The check valves <NUM> feed the channel <NUM> (e.g. fluid communication between the check valves <NUM> and the channel <NUM> between the front end portion of the channel <NUM> and the rear end portion of the channel <NUM>). As such, at least some output from the check valves <NUM> is directed to the channel <NUM> between the front end portion of the channel <NUM> and the rear end portion of the channel <NUM>.

The inlets <NUM> are coupled to the nozzles <NUM> (e.g. fastened, mated, telescoped, adhered, magnetized, sealed, unitary, assembled). The nozzles <NUM> are configured to receive the cartridges <NUM> (e.g. fastening, mating, interlocking). As such, the cartridges <NUM> can be inserted into the nozzles <NUM> (e.g. longitudinally) and the nozzles <NUM> can receive (e.g. snugly, loosely, securely, magnetically, fastenably) the cartridges <NUM> when the cartridges are contained within the handle <NUM>. For example, the cartridges <NUM> can thread into the nozzles <NUM> or magnetically attach to the nozzles <NUM>.

The trigger <NUM> is coupled to a valve poppet <NUM> (e.g. mechanical linkages, gears, bars, cables, springs, shape-memory materials, pulleys, hinges, cams electric motors, actuators). The valve poppet <NUM> can be a single valve poppet <NUM> for the check valves <NUM> or there can be at least two of the valve poppets <NUM> for the check valves <NUM> (e.g. one-to-one correspondence).

The handle <NUM> stores (e.g. temporarily, permanently) the cartridges <NUM>. The cartridges <NUM> can be positioned between the latches <NUM> and the channel <NUM> or the opening <NUM>. The cavity <NUM> can be positioned between the cartridges <NUM>. The cartridges <NUM> have a plurality of necks <NUM> and a plurality of bodies <NUM>. The necks <NUM> longitudinally extend from the bodies <NUM> and are narrower than the bodies <NUM> in external diameter. For example, at least one of the cartridges <NUM> can be a disposable sixteen gram steel carbon dioxide cartridge. For example, the handle <NUM> can be configured to secure the cartridges <NUM> based on the cartridges <NUM> being fastened into the nozzles <NUM> and thereby pushing the necks <NUM> into the nozzles <NUM> where the cartridges <NUM> are punctured or pierced (e.g. seal, cap, neck, top, sidewall), sealed, and activated for use. Although the necks <NUM> and the bodies oppose each other within the handle <NUM>, the neck <NUM> and the bodies can be offset relative to each other (e.g. one cartridge <NUM> is closer to the channel <NUM> than another cartridge <NUM>, one neck <NUM> is closer to the channel <NUM> than another neck <NUM>).

The handle <NUM> hosts the safety lock <NUM> opposite of the barrel <NUM> in proximity (e.g. within about <NUM> inches) of the rear end portion of the channel <NUM>. The safety lock <NUM> is shown as a lever that is pivotable (e.g. manually, automatically) about a shaft (e.g. rectilinear, non-rectilinear, arcuate, sinusoidal, plastic, metal, bar, bolt, screw) extending into the handle <NUM>, where the lever can pivot (e.g. manually, automatically) between the open position and the closed position. For example, the lever can pivot toward the opening <NUM> (e.g. open position) or away from the opening <NUM> (e.g. closed position) or vice versa. Note that although the safety lock <NUM> is described as the lever, the safety lock <NUM> can include a button, a slider, a dial, or another input device, whether additional or alternative to the lever. The trigger <NUM> and the safety lock <NUM> (e.g. lever) can be mechanically linked (e.g. mechanical linkages, gears, bars, cables, springs, shape-memory materials, pulleys, hinges, cams, electric motors, actuators) to each other such that at least some operations of the trigger <NUM> depend on whether the safety lock <NUM> is in the closed position or the open position (e.g. as user controlled).

When the safety lock <NUM> is in the closed position (e.g. away from the opening <NUM>) and the trigger <NUM> is at a default position <NUM> (e.g. zero stage), then the rear end portion of the channel <NUM> avoids at least some fluid communication with an ambient environment external to the rear end portion of the channel <NUM> (e.g. external to the handle <NUM>). As such, this configuration can create a state of being where actuation of the valve poppet <NUM> via the trigger <NUM> is effectively reduced, minimized, or prevented (e.g. negative pressure, vacuum, movement stops) and the trigger <NUM> remains at the default position <NUM> when pressed (e.g. not depressed).

When the safety lock <NUM> is in the open position (e.g. moved toward the opening <NUM>) and the trigger <NUM> is at a first position <NUM> (e.g. first stage), then the rear end portion of the channel <NUM> is in at least some fluid communication with the ambient environment external to the rear end portion of the channel <NUM> (e.g. external to the handle <NUM>). Resultantly, this configuration can create a state of being where the valve poppet <NUM> is lifted, moved backward or forward, or sideways via the trigger <NUM> being at the first positon <NUM> (e.g. partially depressed). Consequently, this positioning of the valve poppet <NUM> allows at least one of the check valves <NUM> to source at least some fluid from at least one of the cartridges <NUM> to travel along a path <NUM> through at least one of the inlets <NUM>, respectively, and guide that fluid into the channel <NUM>, which in turn guides that fluid to the front end portion of the channel <NUM> and then into the barrel <NUM> for subsequent output therefrom. Note that this state of being can also keep at least one of the check valves <NUM> closed such that at least some fluid from at least one of the cartridges <NUM> does not travel along the path <NUM> and is not input into the channel <NUM> via at least one of the inlets <NUM>, respectively. Accordingly, releasing the trigger <NUM> such that the trigger <NUM> moves from the first position <NUM> to the default position <NUM> would in turn enable the valve poppet <NUM> to be lifted, moved backward or forward, or sideways and thereby shut or close at least one of the check valves <NUM> and effectively stop or reduce flow of at least some fluid along the path <NUM> from at least some of the cartridges <NUM>. Note that at least some fluid in the cartridges <NUM> flows from the bodies <NUM> to the necks <NUM>, while the necks <NUM> are extending within the nozzles <NUM>, and then along the path <NUM> to the check valves <NUM> via the inlets <NUM> and then to the channel <NUM> and then to the barrel <NUM>. Further, note that the trigger <NUM> can avoid contacting the handle <NUM> in the first position <NUM> in at least two places (e.g. internally and externally).

When the safety lock <NUM> is or remains in the open position (e.g. moved toward the opening <NUM>) and the trigger <NUM> is at or further moved from the first position <NUM> to a second position <NUM> (e.g. second stage), then the rear end portion of the channel <NUM> is or remains in at least some fluid communication with the ambient environment external to the rear end portion of the channel <NUM> (e.g. external to the handle <NUM>). Resultantly, this configuration can create a state of being where the valve poppet <NUM> is or is further lifted, moved backward or forward, or sideways via the trigger <NUM> being at or further moved to the second positon <NUM> (e.g. fully depressed). Consequently, this positioning of the valve poppet <NUM> allows at least one of the check valves <NUM> (e.g. different from one during first stage) to source at least some fluid from at least one of the cartridges <NUM> to travel along a path <NUM> through at least one of the inlets <NUM>, respectively, and guide that fluid into the channel <NUM>, which in turn guides that fluid to the front end portion of the channel <NUM> and then into the barrel <NUM> for subsequent output therefrom. For example, the trigger <NUM> can contact the handle <NUM> in the second position <NUM> in at least two places (e.g. internally and externally). Note that this state of being can also keep or enable at least one of the check valves <NUM> to close (e.g. different from one during first stage) or be closed such that at least some fluid from at least one of the cartridges <NUM> does not travel along the path <NUM> and is not input into the channel <NUM> via at least one of the inlets <NUM>, respectively. Note that this state of being can also allow that check valve <NUM> to remain open when that respective cartridge <NUM> is empty. Accordingly, releasing the trigger <NUM> such that the trigger <NUM> moves or further moves from the second position <NUM> to the first position <NUM> or the default position <NUM> would in turn enable the valve poppet <NUM> to be lifted, moved backward or forward, or sideways or further lifted, moved backward or forward, or sideways and thereby shut or close or further shut or close at least one of the check valves <NUM> and effectively stop or reduce or further reduce flow of at least some fluid along the path <NUM> from at least some of the cartridges <NUM>. Note that at least some fluid in the cartridges <NUM> flows from the bodies <NUM> to the necks <NUM>, while the necks <NUM> are within the nozzles <NUM>, and then along the path <NUM> to the check valves <NUM> via the inlets <NUM> and then to the channel <NUM> and then to the barrel <NUM>.

Note that although <FIG> shows a staged release from the cartridges <NUM> based on the trigger <NUM> being moved between the default position <NUM>, the first position <NUM>, and the second position <NUM>, the drain gun <NUM> (or the drain gun <NUM>) can be configured for a concurrent release from the cartridges <NUM> based on the trigger <NUM> being moved from the default position <NUM> to the first position <NUM> or the second position <NUM> or vice versa. Note that as the trigger <NUM> moves between the default position <NUM>, the first position <NUM> (e.g. first stage), and the second position <NUM> (e.g. second stage), the trigger <NUM> can be configured to provide a haptic output (e.g. vibration, bump) that at least one of the default position <NUM>, the first position <NUM>, or the second position <NUM> is reached. As such, the trigger <NUM> can cause the staged release of the fluids from the cartridges <NUM> along the path <NUM> and the path <NUM> to the channel <NUM> from the check valves <NUM> when the cartridges <NUM> are stored in the handle <NUM> and feeding the check valves <NUM>.

Note that although <FIG> shows the staged release occurring from a rightmost cartridge <NUM> to a leftmost cartridge <NUM>, the staged release can be reversed and thereby occur from the leftmost cartridge <NUM> to the rightmost cartridge <NUM>. If the handle <NUM> stores more than two of the cartridges <NUM> (e.g. three or more), then the staged release can be fixed in order, user adjustable in order (e.g. knob, button, or switch on handle <NUM> controlling staged release order), serial in order (e.g. toward trigger <NUM>, away from trigger <NUM>), parallel in order, or others.

Note that the handle <NUM> can be configured to control a degree of the staged release of the fluids from the cartridges <NUM>. For example, one of the cartridges <NUM> can be outputting with one pressure, while another cartridge <NUM> can be outputting with another pressure. For example, such control of the degree of the staged release from the cartridges <NUM> can be done via the handle <NUM> having a user interface (e.g. button, knob, lever, switch, touchscreen) that controls (e.g. mechanically, electronically) at least one of the channel <NUM>, at least one of the inlets <NUM>, or at least one of the check valves <NUM>. For example, this form of control can widen or narrow the channel <NUM> or at least one of the inlets <NUM>. For example, this form of control can increase or decrease fluid amount being input into or output via at least one of the check valves <NUM>.

<FIG> shows an embodiment of a plurality of displays of a drain gun according to this disclosure. <FIG> shows an embodiment of a drain gun with a pressure gauge according to this disclosure. <FIG> shows an embodiment of a drain gun with a cover in an open position according to this disclosure. <FIG> shows an embodiment of a drain gun with a cover in a closed position according to this disclosure. <FIG> shows an embodiment a drain gun storing a plurality of cartridges according to this disclosure. In particular, the drain gun <NUM> (or the drain gun <NUM>) hosts the plate <NUM> defining the openings for the displays <NUM>. The openings can be of any shape (e.g. open-shaped, closed-shaped, symmetrical, asymmetrical, O-shape, D-shape, rectangle, square, oval, circle, triangle). Note that the openings are identical to each other in terms of type, shape, or structure. However, the openings can be non-identical to each other in terms of type, shape, or structure (and the handle <NUM> can be adapted for such variations).

The displays <NUM> can be positioned on any side of the handle <NUM> (e.g. top, bottom, lateral, front, rear). The displays <NUM> are analog, but can be digital (e.g. monochrome, color). For example, when the displays <NUM> are digital and when the handle <NUM> contains a battery (e.g. above cartridges, between cartridges, below cartridges), which can be single use, rechargeable, or replaceable, then the battery can power the displays <NUM>. The displays <NUM> can output a content, such as a binary content (e.g. black/white, red/green, <NUM>/<NUM>, full/empty) or a gradual content (e.g. counter, odometer, scale/range, red/yellow/green, full/half/empty), as further disclosed below. For example, the binary content or the gradual content can be seen in dark (e.g. backlight, phosphorescent). Note that the handle <NUM> has a lateral side that hosts the displays <NUM>. For example, the handle <NUM> hosts the displays <NUM> above the covers <NUM>. For example, the covers <NUM> can avoid hosting the displays <NUM>. However, the displays <NUM> can be distributed among a plurality of sides (e.g. frontal, rear, lateral, top, bottom) of the handle <NUM> (e.g. opposite, adjacent). The displays <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the displays <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations).

The content is based on a plurality of pressure gauges <NUM> (e.g. analog, digital, manometers, pressure actuators, springs). The pressure gauges <NUM> are coupled (e.g. mechanically, fluidly, electrically, thermally, optically) to the displays <NUM> and the check valves <NUM>. For example, the pressure gauges <NUM> can be positioned between the displays <NUM> and the check valves <NUM>. For example, the pressure gauges <NUM> and the check valves <NUM> can be a pair of distinct units or a single unit (e.g. single housing, single chassis, single case, single frame). For example, the covers <NUM> can avoid hosting the pressure gauges <NUM>. As such, the pressure gauges <NUM> monitor (e.g. read) at least some pressure of the cartridges <NUM> when the cartridges <NUM> are stored within the handle <NUM> and engage the pressure gauges <NUM> and the check valves <NUM>, which can be through the nozzles <NUM>. For example, the pressure gauges <NUM> can monitor at least some pressure of the cartridges <NUM> when the check valves <NUM> are not inputting at least some fluids from the cartridges <NUM> or outputting at least some fluids into the inlets <NUM>, while the cartridges are within the nozzles <NUM> and engaging the check valves <NUM>. Accordingly, when at least some pressure of the cartridges <NUM>, as measured via the pressure gauges <NUM>, reaches or satisfies or avoids reaching or avoids satisfying a predetermined or dynamic threshold (e.g. empty, half full, half empty, full), then the displays <NUM> can adjust accordingly or present accordingly. Note that the pressure gauges <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the pressure gauges <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations).

The handle <NUM> includes a plurality of shafts <NUM> (e.g. rectilinear, non-rectilinear, arcuate, sinusoidal) extending between the safety lock <NUM> and the barrel <NUM>. The shafts <NUM> can include plastic, metal, or other materials. The shafts <NUM> are identical to each other in terms of type, shape, weight, volume, texture, or structure. However, the shafts <NUM> can be non-identical to each other in terms of type, shape, weight, volume, texture, or structure (and the handle <NUM> can be adapted for such variations). Note that although the shafts <NUM> corresponds to the covers <NUM> in a one-to-one correspondence, there can also be a single shaft <NUM> corresponding to the covers <NUM>.

The handle <NUM> includes the covers <NUM> pivotally coupled to the shafts <NUM>. Note that the covers <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the covers <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations). Although the covers <NUM> are pivotally coupled to the shafts <NUM>, the shafts <NUM> can be omitted and the covers <NUM> fasten, mate, interlock, or snap onto the handle <NUM>, yet still be pivotable relative to the handle <NUM> or removable from the handle <NUM>. For example, the covers <NUM> can pivotally engage with the handle <NUM> via a plurality of C-shape snap end mounts.

The covers <NUM> host a plurality of tails <NUM> extending therefrom (e.g. assembly, unitary). The tails <NUM> are configured to engage with the latches <NUM>. The tails <NUM> extend from the covers <NUM> such that a plurality of L-shapes is defined, although other shapes are possible (e.g. J-shape, V-shape). The tails <NUM> can engage with the latches <NUM> via mating, but other techniques are possible (e.g. interlock, magnetize, hook-and-loop, snap). Note that the tails <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the tails <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations).

The covers <NUM> host a plurality of ribs <NUM> extending therefrom (e.g. assembly, unitary). The ribs <NUM> are configured to support the cartridges <NUM>. For example, the ribs <NUM> can freely support the cartridges <NUM> or couple (e.g. fasten, adhere, mate, interlock, magnetize, snap) to the cartridges <NUM>. For example, the ribs <NUM> can mimic, accommodate, or structurally correspond to the bodies <NUM> (e.g. curved ribs <NUM> to curved bodies <NUM>). The ribs <NUM> extend from the covers <NUM> between the shafts <NUM> and the tails <NUM> such that a plurality of L-shapes is defined, although other shapes are possible (e.g. J-shape, V-shape). Note that the ribs <NUM> are identical to each other in terms of type, shape, weight, modality, or structure. However, the ribs <NUM> can be non-identical to each other in terms of type, shape, weight, modality, or structure (and the handle <NUM> can be adapted for such variations).

The handle <NUM> contains a plurality of carriages <NUM>. The carriages <NUM> are configured to host (e.g. support, hold) the cartridges <NUM> (e.g. freely, snugly, securely, mate, fasten, magnetize, adhere, interlock, snap). The carriages <NUM> can correspond to the cartridges <NUM> in a one-to-one manner, although a single carriage <NUM> can host the cartridges <NUM>. When the covers <NUM> are closed, then the cartridges <NUM> are positioned between the carriages <NUM> and the covers <NUM>. Note that the handle <NUM> contains a partition wall (e.g. solid, perforated) thereby defining a plurality of internal chambers of the drain gun <NUM> (or the drain gun <NUM>), where the internal chambers contain the carriages <NUM> in a one-to-one correspondence. However, note that the partition wall can be omitted thereby enabling the drain gun <NUM> (or the drain gun <NUM>) to have a single internal chamber containing the carriages <NUM>.

As shown in <FIG>, the carriages <NUM> can be stationary within the handle <NUM> or mobile within the handle <NUM>. For example, within the handle <NUM>, the carriages <NUM> can travel toward the channel <NUM> and away from the latches <NUM>, as shown in <FIG>. For example, within the handle <NUM>, the carriages <NUM> can contact the nozzles <NUM> when moved toward the channel <NUM> and away from the latches <NUM> or the nozzles <NUM> can act as a plurality of movement stops for the carriages <NUM>, as shown in <FIG>. Likewise, within the handle <NUM>, the carriages <NUM> can travel away from the channel <NUM> and toward the latches <NUM>, as shown in <FIG> and <FIG>. As such, the carriages <NUM> can travel based on the covers <NUM> being opened or closed, as shown in <FIG>. For example, the carriages <NUM> can travel toward the channel <NUM> and away from the latches <NUM>, as the covers <NUM> are being closed. For example, the carriages <NUM> can travel away from the channel <NUM> and toward the latches <NUM>, as the covers <NUM> are being opened.

Within the handle <NUM>, the carriages <NUM> can travel based on mechanical linkages, gears, bars, cables, springs, shape-memory materials, pulleys, hinges, cams, electric motors, actuators, or others. As such, the handle <NUM> can include a plurality of bars <NUM> coupled (e.g. mated, fastened, interlocked, magnetized, fastened) to the carriages <NUM> and to the covers <NUM>, whether identically or non-identically. The bars <NUM> are U-shaped, but this shaping can vary (e.g. C-shape, L-shape, T-shape). Likewise, the covers <NUM> have a plurality of projections <NUM> (e.g. unitary, assembled, open-shaped, closed-shaped, symmetrical, asymmetrical, cam, circle, oval, square, rectangle, pentagon, octagon, triangle). The projections <NUM> are distal to the tails <NUM> and the ribs <NUM>. Therefore, when the covers <NUM> are pivoted closed, the projections <NUM> engage the bars <NUM> and thereby pull (e.g. lift, urge) the carriages <NUM> to travel towards the channel <NUM> and away from the latches <NUM>. Likewise, when the covers <NUM> are pivoted open, the projections <NUM> engage the bars <NUM> and thereby push (e.g. lower, urge) the carriages <NUM> to travel away from the channel <NUM> and towards the latches <NUM>. Note that, whether additionally or alternatively, within the handle <NUM>, the carriages <NUM> can travel towards the channel <NUM> and away from the latches <NUM> based on at least some urging, assistance, aid, help, movement, or guidance of the ribs <NUM> based on the ribs <NUM> being inserted, injected, or positioned between the latches <NUM> and the carriages <NUM>, as shown in <FIG>.

The carriages <NUM> are J-shaped, but this shaping can vary (e.g. L-shape, U-shape, C-shape, P-shape, T-shape). Note that at least one of the carriages <NUM> can include a lower base configured (e.g. sized, dimensioned) to host, support, or receive at least one of the necks <NUM> when that respective cartridge <NUM> is stored upside-down (e.g. storage, delay activation), where that respective body <NUM> is in proximity of that respective nozzle <NUM> (e.g. within about <NUM> inches) or not within that nozzle <NUM>, yet stored within the handle <NUM> and hosted within that respective carriage <NUM>, as shown in <FIG> and <FIG>. For example, the lower base can define an opening therein (e.g. open-shaped, closed-shape, symmetrical, asymmetrical, O-shape, D-shape, circle, square, triangle, rectangle, pentagon, octagon), where the opening is configured (e.g. sized, dimensioned) to receive that neck <NUM> extending therethrough, as shown in <FIG> and <FIG>. For example, the opening can match an external profile of that neck <NUM> in shape or be snug therewith. As such, the handle <NUM> can define an opening <NUM> (e.g. open-shaped, closed-shape, symmetrical, asymmetrical, O-shape, D-shape, circle, square, triangle, rectangle, pentagon, octagon) therethrough. The opening <NUM> can be configured (e.g. sized, dimensioned) to receive that neck <NUM> extending therethrough after that neck <NUM> extends through the opening of the lower base of that respective carriage <NUM>. Note that the carriages <NUM> are identical to each other in terms of type, shape, weight, modality, range of travel, direction of travel, or structure. However, the carriages <NUM> can be non-identical to each other in terms of type, shape, weight, modality, range of travel, direction of travel, or structure (and the handle <NUM> can be adapted for such variations). Note that the handle <NUM> can avoid the carriages <NUM> as well.

<FIG> shows an embodiment of a drain gun with a cap in an open position according to this disclosure. In particular, the drain gun <NUM> is similar to the drain gun <NUM> except for various features disclosed below relative to <FIG>.

The handle <NUM> hosts the caps <NUM> coupled (e.g. fastened, mated, snapped, interlocked) thereto. The caps <NUM> can include plastic, metal, rubber or other materials. The caps <NUM> are externally grooved, bumped, or knurled for grip enhancement, but can be externally smooth. The caps <NUM> can be of any shape (e.g. tubular, cylinder, dome, cuboid, cube, hemisphere, pyramid, cone). Note that the caps <NUM> are identical to each other in terms of type, shape, weight, or structure. However, the caps <NUM> can be non-identical to each other in terms of type, shape, weight, or structure (and the handle <NUM> can be adapted for such variations).

The caps <NUM> are tethered to the handle <NUM> via a plurality of lines <NUM> (e.g. tether, string, cable, chain, strap, rope, braid, bar, shaft, planar member). The lines <NUM> are coupled to the handle <NUM> (e.g. fasten, mate, interlock, adhere, magnetize, snap, hook-and-loop), whether identically or non-identically. The lines <NUM> are coupled to the caps <NUM> (e.g. fasten, mate, interlock, adhere, magnetize, snap, hook-and-loop), whether identically or non-identically. The lines <NUM> can include plastic, metal, rubber, or other materials, whether identical or non-identical to each other. The lines <NUM> can be rigid or flexible, whether identical or non-identical to each other. The lines <NUM> can retract into or out of the handle <NUM>. For example, when retracted into the handle <NUM>, the lines <NUM> can be positioned between the cartridges <NUM> stored within the handle <NUM> between the caps <NUM> and the channel <NUM>. The lines <NUM> are sufficiently long to enable caps <NUM> to avoid interfering with the cartridges <NUM> being inserted into the handle <NUM> or being from the handle <NUM>. As such, the cartridges <NUM> are inserted into the handle <NUM> or removed from the handle <NUM> (e.g. fall out, slide) when the caps <NUM> are not controlling access into the handle <NUM> or from the handle <NUM>.

<FIG> shows an embodiment of a drain gun with an opening according to this disclosure. In particular, the handle <NUM> defines the opening <NUM> (e.g. closed-shape, open-shaped, symmetrical, asymmetrical, O-shaped, D-shaped, rectangle, square, oval, circle, triangle) through which a strap, a hook (e.g. belt hook), or a carabiner can extend. The opening <NUM> extends between the trigger <NUM> and the safety lock <NUM>.

<FIG> shows an embodiment of a hose and a tip adapter for usage with a drain gun according to this disclosure. In particular, a system <NUM> includes a tube <NUM> (e.g. plastic, metal, rubber, braided, armored, flexible, rigid, transparent, translucent, opaque, insulated, non-insulated) having a first end portion <NUM> and a second end portion <NUM>. For example, the tube <NUM> can be a hose that is flexible. The first end portion <NUM> is configured for coupling to the barrel <NUM> (e.g. fastening, mating, interlocking, snapping, magnetizing, telescoping into/over). The second end portion <NUM> is configured to couple (e.g. fastening, mating, interlocking, snapping, magnetizing, telescoping into/over) to a tip adapter <NUM>. The tip adapter <NUM> is conical in order to fluidly engage with a drain line, which can vary in width. For example, the tip adapter <NUM> can fluidly engage and form a seal with the drain line. As such, (<NUM>) the barrel <NUM> can couple to the first end portion <NUM>, (<NUM>) the tip adapter <NUM> can couple to the second end portion <NUM>, and (<NUM>) the tip adapter <NUM> can fluidly engage the drain line. Therefore, when the trigger <NUM> is pressed toward the handle <NUM>, the drain gun <NUM> (or the drain gun <NUM>) can perform a staged output of the fluids from the cartridges <NUM>.

In one mode of operation, the drain gun <NUM> (or the drain gun <NUM>) includes the handle <NUM> and the trigger <NUM>. The handle <NUM> includes the channel <NUM> and the check valves <NUM>. The check valves <NUM> feed the channel <NUM> and the trigger <NUM> causes the staged release of the fluids from the cartridges <NUM> to the channel <NUM> from the check valves <NUM> when the cartridges <NUM> are stored in the handle <NUM> and feeding the check valves <NUM>. The handle <NUM> can include the pressure gauges <NUM> and the displays <NUM>, where the displays <NUM> can present based on the pressure gauges <NUM>. The pressure gauges <NUM> monitor the cartridges <NUM> when the cartridges <NUM> are stored in the handle <NUM> and engaging the check valves <NUM>. The displays <NUM> can be analog and can present the gradual content or the binary content. The binary content can include a plurality of colors that are visually distinct from each other. The handle <NUM> can include a lateral side hosting the displays <NUM>. The handle <NUM> can include the internal chambers. The lateral side can include the covers <NUM> controlling access to the internal chambers, where the internal chambers are sized to contain the cartridges <NUM>. The pressure gauges <NUM> and the displays <NUM> can be not hosted via the covers <NUM>. The handle <NUM> can host the carriages <NUM> configured to move toward the channel <NUM> as the covers <NUM> are being closed and where the carriages <NUM> are configured to host the cartridges <NUM>. The carriages <NUM> can be configured to move away from the channel <NUM> as the covers <NUM> are being opened. The covers <NUM> can include the ribs <NUM> that engage the carriages <NUM> when the covers <NUM> are closed such that the carriages <NUM> are positioned between the ribs <NUM> and the channel <NUM>. The handle <NUM> can include the internal chambers, where the handle <NUM> hosts caps <NUM> controlling access to the internal chambers and where the internal chambers are positioned between the channel <NUM> and the caps <NUM> and where the internal chambers are sized to contain the cartridges <NUM>. The caps <NUM> can thread onto the handle <NUM> and can be coupled to the handle <NUM> via the lines <NUM>, where the lines <NUM> are configured to recede into handle <NUM> when the caps <NUM> contact the handle <NUM>. The handle <NUM> can define <NUM> the opening sized for engaging with at least one of a strap, a belt hook, or a carabiner, wherein the channel <NUM> is positioned between the opening <NUM> and the check valves <NUM>. The staged release can include a plurality of stages, wherein the trigger <NUM> can provides a haptic output that at least one of the stages is reached. The handle <NUM> can include the covers <NUM>, where the handle <NUM> includes the internal chambers to which the covers <NUM> control access, where the internal chambers are sized to contain the cartridges <NUM>. The handle <NUM> can host the carriages <NUM>, where the carriages <NUM> are configured to move toward the channel <NUM> as the covers <NUM> are being closed and where the carriages <NUM> are configured to host the cartridges <NUM>. The covers <NUM> can include the ribs <NUM> that engage the carriages <NUM> when the covers <NUM> are closed such that the carriages <NUM> are positioned between the ribs <NUM> and the check valves <NUM>. The handle <NUM> can host the carriages <NUM> where the carriages <NUM> are configured to move away from the channel <NUM> as the covers <NUM> are being opened and where the carriages <NUM> are configured to host the cartridges <NUM>. The handle <NUM> can include the internal chambers, where the handle <NUM> can host the caps <NUM> controlling access to the internal chambers and where the internal chambers are positioned between the channel <NUM> and the caps <NUM> and where the internal chambers are sized to contain the cartridges <NUM>. The caps <NUM> can thread onto the handle <NUM> and the caps <NUM> can be coupled to the handle via the lines <NUM> and the lines <NUM> can be configured to recede into handle <NUM> when the caps <NUM> contact the handle <NUM>. The fluids from the cartridges <NUM> can define a full capacity of the cartridges <NUM>, where the full capacity is dispensed at once when the trigger <NUM> is pulled to a full stroke. The handle <NUM> can include the safety lock <NUM> that prevents an unintended discharge of the staged release. The handle <NUM> can be configured to store at least one of the cartridges <NUM> without puncturing or piercing (e.g. seal, cap, neck, top, sidewall) the at least one of the cartridges <NUM> and while the at least one of the cartridges <NUM> is not engaging the check valves <NUM>. For example, a method can comprise: coupling the drain gun <NUM> (or the drain gun <NUM>) to a drain line that is clogged. The drain gun <NUM> (or the drain gun <NUM>) can host the cartridges <NUM> storing the fluids. The method can comprise outputting the fluids from the drain gun <NUM> (or the drain gun <NUM>) controllably in stages such that the drain line is unclogged via the fluids.

<FIG> show a plurality of embodiments of a plurality of accessories that can be used with a drain gun according to this disclosure. In particular, an inflatable tip adapter <NUM> includes a coupling portion <NUM> and an insertion portion <NUM>. The insertion portion <NUM> is assembled with the coupling portion <NUM> (e.g. fastened, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped), but can be unitary therewith (e.g. single piece inclusive of same material). The coupling portion <NUM> has or avoids having a material (e.g. plastic, metal, rubber, polyvinyl chloride (PVC), rigid, flexible, opaque, transparent, translucent) in common with the insertion portion <NUM>.

The coupling portion <NUM> includes an end portion <NUM> (e.g. plastic, metal, rubber) configured for coupling to the drain gun <NUM> or the drain gun <NUM> or the tube <NUM> or the tip adapter <NUM> or a tip adapter <NUM> (e.g. mechanically, fluidly, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped). For example, the drain gun <NUM> or the drain gun <NUM> can be directly coupled to the end portion <NUM> via threading thereunto (e.g. barrel <NUM>) such that the barrel <NUM> is in fluid communication with the end portion <NUM>. For example, the drain gun <NUM> or the drain <NUM> can be indirectly coupled the end portion <NUM> via the tube <NUM> where the tube <NUM> is in fluid communication with the barrel <NUM> on the first end portion <NUM> at one end thereof (e.g. mechanical coupling, fastened, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped) and in fluid communication with the end portion <NUM> on the second end portion <NUM> on opposing end thereof (e.g. mechanical coupling, fastened, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped).

The insertion portion <NUM> includes an inflatable portion <NUM> (e.g. rubber, latex, elastomeric, shape memory) that longitudinally and cylindrically (e.g. rectilinear, arcuate, sinusoidal) extends in a direction (e.g. opposite, perpendicular, acute, obtuse) away from the end portion <NUM>. The inflatable portion <NUM> has a round lateral cross-section, but other lateral cross-sections are possible (e.g. square, rectangle, triangle, octagon, pentagon, D-shape, closed-shape, open-shape, symmetrical, asymmetrical). As shown in <FIG>, the inflatable portion <NUM> is at a deflated state. As shown in <FIG>, the inflatable portion <NUM> is at an inflated state.

The inflatable portion <NUM> includes a plurality of ridges <NUM> (e.g. solid walls, perforated walls) circumferentially extending along the inflatable portion <NUM> and are spaced apart from each other along the inflatable portion <NUM>. Note that the inflatable portion <NUM> can host at least one of the ridges <NUM> or two or more of the ridges <NUM>, whether identical or non-identical to each other in shape, structure, material, properties, or others. The ridges <NUM> can be extend perpendicular to the inflatable portion <NUM> or non-perpendicular to the inflatable portion <NUM> (e.g. acute, obtuse). The ridges <NUM> can be solid lines (e.g. uniform height, variable height) or broken lines (e.g. uniform height, variable height). The ridges <NUM> can intersect, face, or overlap each other or avoid intersecting, facing, or overlapping each other, whether the inflatable portion <NUM> is inflated or not. This spacing can be equal (e.g. parallel) or unequal (e.g. non-parallel) , whether the inflatable portion <NUM> is inflated or not. Note that the ridges <NUM> can extend helically, spiral, or coil about or along the inflatable portion <NUM>, whether the inflatable portion <NUM> is inflated or not. The ridges <NUM> are longitudinally circular, but other shapes are possible (e.g. oval, square, triangle, octagon, pentagon, D-shape, open-shape, closed-shape, symmetrical, asymmetrical). The ridges <NUM> are unitary with the inflatable portion <NUM> (e.g. single piece inclusive of same material), but can be assembled therewith (e.g. mechanical coupling, fastened, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped) or can include at least some material different from the inflatable portion <NUM>.

The inflatable portion <NUM> includes an end portion <NUM> distal from and opposing the end portion <NUM>. The end portion <NUM> projects outward away from the end portion <NUM> (e.g. dome-shaped, conical, pyramidal), but can be planar or dimple inward toward the end portion <NUM> (e.g. depression, well). The end portion <NUM> is substantially closed (e.g. at least <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%) except for defining an opening <NUM>, which can be positioned at a leading edge (e.g. rounded, pointed) thereof when the leading edge is present. Note that the opening <NUM> is circular, but can be shaped differently (e.g. slit, oval, square, triangle, octagon, pentagon, D-shape, open-shape, closed-shape, symmetrical, asymmetrical). For example, the opening can be an elongated slit, a closed-shape slit, a circular slit, a crescent shape slit, or others. For example, the end portion <NUM> can includes a set of openings <NUM> (e.g. at least two, three, four, five, six, seven, eight, nine, ten, twenty) distributed thereabout (e.g. salt-shaker style), whether randomly or according to a pattern (e.g. star, alphanumeric character, logo, character).

The inflatable tip adapter <NUM> is inserted into an open end of a tube <NUM> (e.g. plastic, metal, rubber, PVC, rigid, flexible, opaque, transparent, translucent) such that the inflatable portion <NUM> is substantially within the tube <NUM> (e.g. at least <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%) or until the open end of the tube <NUM> engages (e.g. contacts) the coupling portion <NUM>. For example, the tube <NUM> is a drain line or is fluidly associated with a drain line. When the inflatable portion <NUM> is within the tube <NUM> and the tube <NUM> has an inner surface (e.g. smooth, rough, knurled), the ridges <NUM> contact or avoid contacting the inner surface <NUM>. As such, at least one of the ridges <NUM> can create a seal, which can be hermetic, with the inner surface of the tube <NUM>. Note that at least some gas (e.g. air) can remain between the ridges <NUM>, the inner surface of the tube <NUM>, and the inflatable portion <NUM>.

In one mode of operation, the inflatable tip adapter <NUM> has the inflatable portion <NUM> that is inserted into the open end of the tube <NUM>. When the drain gun <NUM> or the drain <NUM> output the fluids (e.g. gas, liquid) therefrom, the inflatable tip portion <NUM> expands and thereby seals via at least one of the ridges <NUM>, whether contacting or avoiding contact with the inner surface of the tube <NUM>, and grips via at least one of the ridges <NUM> against the inner surface of the tube <NUM>, which prevents the inflatable tip adapter <NUM> from slipping out from the tube <NUM>. The opening <NUM> allows at least some of the fluids (e.g. gas. liquid) to proceed through the tube <NUM> and unclog the tube <NUM> downstream. For example, the coupling portion <NUM> can be connected to the barrel <NUM> or the second end portion <NUM> (with the first end portion <NUM> being fluidly connected to the barrel <NUM>) of the tube <NUM>. The insertion portion <NUM> inserted into the open end of the tube <NUM>. Then, the drain gun <NUM> or the drain gun <NUM> can dispense the fluids (e.g. gas, liquid) therefrom. During this dispensation, the inflatable portion <NUM> is inflated and causes at least some of the ridges <NUM> to create a seal against the inner surface of the tube <NUM>. The seal enables at least some pressure to build on the end portion <NUM> and thereby outputting the fluids from the opening <NUM> and pushing at least some clog materials through and out of the tube <NUM>.

<FIG> shows an embodiment of a shuttle that can be used with a drain gun according to this disclosure. In particular, a shuttle <NUM> includes a body <NUM> that hosts a plurality of ridges <NUM>. The shuttle <NUM>, inclusive of the body <NUM> and the ridges <NUM>, can include a material that includes or can be plastic, metal, rubber, latex, elastomeric material, PVC, rigid, flexible, opaque, transparent, translucent, or others. For example, the shuttle <NUM> can be embodied as a tube plug.

The body <NUM> includes a leading end portion <NUM> and a trailing end portion <NUM>. The body <NUM> is longitudinally elongated (e.g. rectilinear, arcuate, sinusoidal) between the leading end portion <NUM> and the trailing end portion <NUM>. The body <NUM> can be internally hollow between the leading end portion <NUM> and the trailing end portion <NUM> or internally solid between the leading end portion <NUM> and the trailing end portion <NUM>. The body <NUM> can include an internal channel (e.g. rectilinear, arcuate, sinusoidal) between the leading end portion <NUM> and the trailing end portion <NUM>. The body <NUM> can be inflatable (e.g. gas, liquid) or non-inflatable.

The ridges <NUM> (e.g. solid walls, perforated walls) are circumferentially extending along the body <NUM> and are spaced apart from each other along the body <NUM>. Note that the body <NUM> can host at least one of the ridges <NUM> or two or more of the ridges <NUM>, whether identical or non-identical to each other in shape, structure, material, properties, or others. The ridges <NUM> can be extend perpendicular to the body <NUM> or non-perpendicular to the body <NUM> (e.g. acute, obtuse). The ridges <NUM> can be solid lines (e.g. uniform height, variable height) or broken lines (e.g. uniform height, variable height). The ridges <NUM> can intersect, face, or overlap each other or avoid intersecting, facing, or overlapping each other, whether the body <NUM> is inflated or not. This spacing can be equal (e.g. parallel) or unequal (e.g. non-parallel) , whether the body <NUM> is inflated or not. Note that the ridges <NUM> can extend helically, spiral, or coil about or along the body <NUM>, whether the body <NUM> is inflated or not. The ridges <NUM> are longitudinally circular, but other shapes are possible (e.g. oval, square, triangle, octagon, pentagon, D-shape, open-shape, closed-shape, symmetrical, asymmetrical). The ridges <NUM> are unitary with the body <NUM> (e.g. single piece inclusive of same material), but can be assembled therewith (e.g. mechanical coupling, fastened, mated, interlocked, adhered, magnetized, nested, mounted, friction engaged, clamped). The trailing end portion <NUM> is coupled (e.g. fastened, mated, interlocked, adhered, bonded, looped, stitched, weaved, magnetized, injected, tied) to a leading end portion of a line <NUM> (e.g. tether, rope, cable, chain, rod, plunger, string, braid, planar extension, X-shaped extension, helical extension, coiled extension, spiral extension, stretchable extension, resilient extension, elastic extension, rigid extension). The line <NUM> has a trailing end portion that can be coupled (e.g. fastened, mated, interlocked, adhered, bonded, looped, stitched, weaved, magnetized, injected, tied) to the drain gun <NUM> (e.g. barrel <NUM>, handle <NUM>) or the drain gun <NUM> (e.g. barrel <NUM>, handle <NUM>) or another device (e.g. stationary, mobile, drain gun end effector, hose, fixture, furniture, appliance, tube, air handler, building floor) or be manually held (e.g. arm, finger, palm, garment).

In one mode of operation, the shuttle <NUM> is inserted into an open end (e.g. inlet) of a drain line having an inner surface (e.g. smooth, rough, knurled) such that the ridges <NUM> contact or avoid contact with the inner surface of the drain line and the shuttle <NUM> can be propelled therethrough via the fluids sourced from the drain gun <NUM> or the drain gun <NUM>, yet still be recoverable from within the drain line via pulling on the line <NUM>, whether this pulling is manual or automatic (e.g. motor, actuator, reel). This form of travel can clear at least some obstructions of the drain line. For example, the shuttle <NUM> can be inserted into the open end of the drain line, whether with the line <NUM> or without the line <NUM>, such that the ridges <NUM> face the inner surface of the drain line. Resultantly, the line <NUM> trails the body <NUM>. Then, when the drain gun <NUM> or the drain <NUM> outputs the fluids (e.g. gas, liquid) therefrom, the shuttle <NUM> is propelled within the drain line and away from the open end of the drain line. The ridges <NUM> can contact or avoid contacting the inner surface of the drain line. The leading end portion <NUM>, the body <NUM>, or at least some of the ridges <NUM> can exert a positive force (e.g. pressure) onto a clog within the drain line and can mechanically loosen or push the clog longitudinally along the drain line, which can include to an outlet thereof. Then, the line <NUM> can be pulled or retracted from the open end of the drain line (e.g. fishing style) such that the body <NUM> can be retrieved from the open end of the drain line from which the body <NUM> was launched. Alternatively, the body <NUM> can be retrieved from the outlet of the drain line, whether with the line <NUM> or without the line <NUM>, which can depend on how the body <NUM> was launched.

<FIG> show a plurality of embodiments of a plurality of expanding-grip stepped plugs that can be used with a drain gun according to this disclosure. In particular, as shown in <FIG>, an expanding-grip stepped plug 1400a includes a stepped section <NUM>, a wingnut section <NUM>, and a fitting section <NUM>.

The stepped section <NUM> includes a plurality of tubular members <NUM> that are concentric with each other and progressively and longitudinally step-down away from the wingnut section <NUM> (e.g. decrease in outer diameter, decrease in outer perimeter, decrease in inner diameter, decrease in inner perimeter) in order to fit various drain line inner diameter sizes. The stepped section <NUM> contains an inner channel (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star, uniform internal width, varying internal width, tapered internal width) centrally extending through the tubular members <NUM>. The stepped section <NUM> includes an open end portion <NUM> defining an opening (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star) in fluid communication with the inner channel.

The tubular members <NUM> are circular, but this shaping can vary (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star). The tubular members <NUM> are identical to each other in shape, but differ from each other in size (e.g. stepped). However, some of the tubular members <NUM> can differ in shape from each other as well (e.g. circle and oval). The tubular members <NUM> have smooth outer surfaces, but this can vary (e.g. rough, knurled, projections, bumps, depressions). The tubular members <NUM> are unitary with each other (e.g. single piece inclusive of same material), but can be assembled with each other (e.g. adhering, magnetizing, interlocking, fastening, mating, bonding). The tubular members <NUM> can include an elastic, elastomeric, flexible, or shape memory material (e.g. polymer, plastic, rubber, latex, silicon, nitinol).

The wingnut section <NUM> includes a wingnut with a plurality of wings external to the stepped section <NUM> and positioned between the tubular members <NUM> and the fitting section <NUM>. The wings are outwardly tapered, but this can vary (e.g. wings inwardly taper, wings do not taper). The wingnut section <NUM> has an inner channel (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star, uniform internal width, varying internal width, tapered internal width) centrally extending therethrough and in fluid communication with the inner channel of the stepped section <NUM>. The wingnut section <NUM> can be rigid or flexible or differ from the stepped section <NUM> in material (e.g. plastic, metal, rubber, PVC, rigid, flexible, opaque, transparent, translucent). The inner channel of the stepped section <NUM> and the inner channel of the wingnut section <NUM> can be co-aligned along a common axis and the wingnut with the wings can be rotated clockwise or counterclockwise about the common axis.

The fitting section <NUM> (e.g. plastic, metal, rubber, latex, shape-memory, elastomeric, PVC, rigid, flexible, opaque, transparent, translucent) includes an open end portion configured to fluidly couple (e.g. fasten, mate, interlock, magnetize, adhere) to the drain gun <NUM> or the drain gun <NUM> or the tube <NUM> or the tip adapter <NUM>. The fitting section <NUM> can be rigid, elastic, resilient, shape memory, or flexible, whether rectilinear or non-rectilinear. For example, the fitting section <NUM> can be rigid or shaped in various ways (e.g. I-shape, L-shape, J-shape, S-shape, T-shape, plus-shape, X-shape). For example, the fitting section <NUM> can bend between about <NUM> degrees and about <NUM> degrees (e.g. living hinge, drinking straw-type hinge) in a single direction or among a plurality of directions. For example, the fitting section <NUM> can bend between about <NUM> degrees and about or less than <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or <NUM> degrees in a single direction or among a plurality of directions. The fitting section <NUM> includes an inner channel (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star, uniform internal width, varying internal width, tapered internal width) extending therethrough. The inner channel of the fitting section <NUM> and the inner channel of the wingnut section <NUM> or the stepped section <NUM> can be co-aligned along a common axis. Alternatively, the inner channel of the fitting section <NUM> can extend through the wingnut section <NUM> and the stepped section <NUM> (e.g. wingnut section <NUM> and stepped section <NUM> envelop, extend about, or mounted onto fitting section <NUM>). For example, the wingnut section <NUM> can be mounted over (e.g. adhered, bonded) the inner channel of the fitting section <NUM> and the inner channel of the fitting section <NUM> can be extending through the inner channel of the wingnut section <NUM>. Likewise, the stepped section <NUM> can be mounted over (e.g. adhered, bonded) the inner channel of the fitting section <NUM> and the inner channel of the fitting section <NUM> can be extending through the inner channel of the stepped section <NUM>.

In one mode of operation, the stepped section <NUM> is inserted into an open end (e.g. inlet) of a drain line (e.g. rigid tube, flexible tube) having an inner surface such that the opening of the open end <NUM> is in fluid communication with the drain line and at least some of the tubular members <NUM> face, contact, or snug against the inner surface. For example, the stepped section <NUM> can be inserted up to a nearest matching drain line inner diameter size. At that point, the wingnut section <NUM> can be rotated clockwise or counterclockwise (e.g. fastened) such that at least one of the tubular members <NUM> (e.g. matching to drain line inner diameter size) can be outwardly expanded to contact, grip, or seal, which can be hermetic, against the inner surface of the drain line. Therefore, the stepped section <NUM> can be inserted into the open end of the drain line when the drain line is clogged. The wingnut section <NUM> can be fastened such that at least one of the tubular members <NUM> (e.g. matching to drain line inner diameter size) can be outwardly expanded to contact, grip, or seal, which can be hermetic, against the inner surface of the drain line. The drain gun <NUM> or the drain gun <NUM> or the tube <NUM> or the tip adapter <NUM> can be fluidly coupled (e.g. fastened, mated, interlocked) to the fitting section <NUM> such the at least one of the cartridges can source at least one of the fluids through the fitting section <NUM>, the wingnut section <NUM>, and the stepped section <NUM> into the drain line and thereby at least partially unclog the drain line.

As shown in <FIG>, an expanding-grip stepped plug 1400b includes the stepped section <NUM> and the fitting section <NUM> and an expanding-grip stepped plug 1400c includes the stepped section <NUM> and the fitting section <NUM>. However, the expanding-grip stepped plug 1400b and the expanding-grip stepped plug 1400c differ from the expanding-grip stepped plug 1400a by having a cam lever <NUM> and a cam lever <NUM>, respectively.

As shown in <FIG>, the cam lever <NUM> is shaped in an L-shape, as defined via a base <NUM> and a column <NUM>. However, note that the cam lever <NUM> can be shaped differently (e.g. J-shape, C-shape, U-shape). The cam lever <NUM> also includes a pivot <NUM> (e.g. rectilinear, arcuate, sinusoidal) extending from the fitting section <NUM> into the base <NUM> or vice versa. The pivot <NUM> can be flush with the base <NUM> or extend past the base <NUM>. The pivot <NUM> can be unitary with the fitting section <NUM> (e.g. single piece inclusive of same material) or the pivot <NUM> can be assembled with the fitting section <NUM> (e.g. fastened, mated, interlocked, adhered, magnetized, bonded). Alternatively, the pivot <NUM> can be unitary with the base <NUM> (e.g. single piece inclusive of same material) or the pivot <NUM> can be assembled with the base <NUM> (e.g. fastened, mater, interlocked, adhered, magnetized, bonded). The column <NUM> defines an internal opening <NUM> structured such that the fitting section <NUM> fits therethrough, without bending, when the cam lever <NUM> is rotated about <NUM> degrees about the pivot <NUM>. For example, the opening <NUM> can be rectangular, oval, L-shaped, or others. Note that the fitting section <NUM> can be rigid or flexible.

As shown in <FIG>, the expanding-grip stepped plug 1400c differs from the expanding-grip stepped plug 1400b by the fitting section <NUM> being L-shaped or bendable or flexible or resilient or elastic and the expanding-grip stepped plug 1400c having the cam lever <NUM> being equipped with the column <NUM> lacking the opening <NUM> (e.g. solid), although the column <NUM> can be perforated or latticed. As such, the fitting section <NUM> remains L-shaped, while the cam lever <NUM> is pivoted about the pivot <NUM>. For example, the fitting section <NUM> being L-shaped can be useful in tight spaces. Note that the fitting section <NUM> can be configured such that a hose or an adapter fluidly coupled thereto distal from the stepped section <NUM> can clear the fitting section <NUM> regardless of positioning of the cam lever <NUM> or the cam lever <NUM>. For example, the hose or the adapter may need not be fluidly connected to the fitting section <NUM>, while the cam lever <NUM> is pivoted about the pivot <NUM>. Alternatively, the fitting section <NUM> is bendable or flexible or resilient or elastic and therefore correspondingly bends or flexes, as being urged by the column <NUM>, when the cam lever <NUM> is pivoted about the pivot <NUM>.

In one mode of operation, the stepped section <NUM> is inserted into an open end (e.g. inlet) of a drain line (e.g. rigid tube, flexible tube) having an inner surface such that the opening of the open end <NUM> is in fluid communication with the drain line and at least some of the tubular members <NUM> face, contact, or snug against the inner surface. For example, the stepped section <NUM> can be inserted up to a nearest matching drain line inner diameter size. At that point, the cam lever <NUM> or the cam lever <NUM> can be pivoted clockwise or counterclockwise (e.g. fastened) about the pivot <NUM> such that at least one of the tubular members <NUM> (e.g. matching to drain line inner diameter size) can be outwardly expanded to contact, grip, or seal, which can be hermetic, against the inner surface of the drain line. Therefore, the stepped section <NUM> can be inserted into the open end of the drain line when the drain line is clogged. The cam lever <NUM> or the cam lever <NUM> can be rotated (e.g. fastened) such that at least one of the tubular members <NUM> (e.g. matching to drain line inner diameter size) can be outwardly expanded to contact, grip, or seal, which can be hermetic, against the inner surface of the drain line. The drain gun <NUM> or the drain gun <NUM> or the tube <NUM> or the tip adapter <NUM> can be fluidly coupled (e.g. fastened, mated, interlocked) to the fitting section <NUM> such the at least one of the cartridges can source at least one of the fluids through the fitting section <NUM> and the stepped section <NUM> into the drain line and thereby at least partially unclog the drain line.

As shown in <FIG>, the expanding-grip stepped plug 1400a includes the fitting section <NUM> longitudinally and concentrically extending through the wingnut section <NUM> and the stepped section <NUM> along a common axis. In the stepped section <NUM>, the fitting section <NUM> extends through the tubular members <NUM>. As such, since the fitting section <NUM> has a flange at an end thereof, when the wingnut is rotated via the wings about the common axis, whether clockwise or counterclockwise, the flange translates this rotation thereby compressing and outwardly expanding the stepped section <NUM> (e.g. tubular members <NUM>) against the inner surface of the drain line such that the stepped section <NUM> can create the seal against the inner surface of the drain line.

As shown in <FIG>, the expanding-grip stepped plug 1400b includes the fitting section <NUM> longitudinally and concentrically extending through the stepped section <NUM> along a common axis. The pivot <NUM> is orthogonal or perpendicular to the common axis and the cam lever <NUM> pivots about the pivot <NUM> relative to the fitting section <NUM>. Therefore, based on such pivoting, the base <NUM> is positioned such that the base <NUM> compresses and outwardly expands the stepped section <NUM> (e.g. tubular members <NUM>) against the inner surface of the drain line (e.g. wine stopper style).

<FIG> shows an embodiment of a Venturi effect suction fitting that can be used with a drain gun according to this disclosure. In particular, a Venturi effect suction fitting <NUM> includes a first tubular portion <NUM>, a second tubular portion <NUM>, and a third tubular portion <NUM>. The first tubular portion <NUM>, the second tubular portion <NUM>, and the third tubular portion <NUM> are arranged with each other such that a T-shape is defined thereby. However, note that this shaping can vary (e.g. Y-shape, W-shape, M-shape, E-shape). For example, although the first tubular portion <NUM> and the second tubular portion <NUM> are orthogonal or perpendicular with each other, the first tubular portion <NUM> and the second tubular portion <NUM> can be acutely angled or obtusely angled with each other. Likewise, although the third tubular portion <NUM> and the second tubular portion <NUM> are orthogonal or perpendicular with each other, the third tubular portion <NUM> and the second tubular portion <NUM> can be acutely angled or obtusely angled with each other. Similarly, although the first tubular portion <NUM> and the third tubular portion <NUM> are polar opposite of each other, the first tubular portion <NUM> and the third tubular portion <NUM> can be acutely angled, obtusely angled, or perpendicular or orthogonally angled with each other. At least two of the first tubular portion <NUM>, the second tubular portion <NUM>, or the third tubular portion <NUM> are unitary with each other (e.g. single piece inclusive of same material), but can be assembled with each other (e.g. fastening, mating, interlocking, bonding, adhering, magnetizing). At least one of the first tubular portion <NUM>, the second tubular portion <NUM>, or the third tubular portion <NUM> can include plastic, metal, rubber, shape memory, or other materials, whether rigid, elastic, elastomeric, resilient, or flexible, whether transparent, opaque, or translucent.

Each of the first tubular portion <NUM>, the second tubular portion <NUM>, and the third tubular portion <NUM> contains an inner channel (e.g. open-shape, closed-shape, symmetrical, asymmetrical, square, rectangular, triangular, pentagon, octagonal, star, uniform internal width, varying internal width, tapered internal width) extending therethrough, whether identical to or non-identical from each other in shape, orientation, diameter, cross-section, or other properties. The inner channel of the first tubular portion <NUM> and the inner channel of the third tubular section <NUM> are in fluid communication with each other and can be or can avoid being co-aligned along a common axis. The inner channel of the second tubular section <NUM> is in fluid communication with the inner channel of first tubular section <NUM> and the inner channel of the third tubular section <NUM>. The inner channel of the second tubular section <NUM> is perpendicular or orthogonal to the inner channel of the first tubular section <NUM> or the inner channel of the third tubular section <NUM>. However, this can vary. For example, although the inner channel of the first tubular portion <NUM> and the inner channel of the second tubular portion <NUM> are orthogonal or perpendicular with each other, the inner channel of the first tubular portion <NUM> and the inner channel of the second tubular portion <NUM> can be acutely angled or obtusely angled with each other. Likewise, although the inner channel of the third tubular portion <NUM> and the inner channel of the second tubular portion <NUM> are orthogonal or perpendicular with each other, the inner channel of the third tubular portion <NUM> and the inner channel of the second tubular portion <NUM> can be acutely angled or obtusely angled with each other. Similarly, although the inner channel of the first tubular portion <NUM> and the inner channel of the third tubular portion <NUM> are polar opposite of each other, the inner channel of the first tubular portion <NUM> and the inner channel of the third tubular portion <NUM> can be acutely angled, obtusely angled, or perpendicular or orthogonally angled with each other.

The first tubular portion <NUM> is configured for coupling (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting) to the drain gun <NUM> or the drain gun <NUM> or the tube <NUM> or the tip adapter <NUM> or a source of a pressurized fluid (e.g. gas tank, elastic bladder, inflatable balloon). The second tubular section <NUM> has a plurality of barbs or threads <NUM> configured for coupling to a drain line (e.g. outlet, inlet). However, note that the second tubular section <NUM> can be configured for coupling to the drain line in many ways (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting). The third tubular portion <NUM> has a plurality of barbs or threads <NUM> configured for coupling to an exhaust tube (e.g. inlet, outlet). However, note that the third tubular section <NUM> can be configured for coupling to the exhaust tube in other ways (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting). As such, the Venturi effect suction fitting <NUM> can be used where at least some access to an inlet of a drain line (e.g. tube, pipe) is restricted or limited or difficult to obtain. In such situations, the Venturi effect suction fitting <NUM> employs a Venturi effect with a pressurized fluid (e.g. gas, liquid) to clear an obstruction by suction, from an outlet of the drain line.

In one mode of operation, the first tubular portion <NUM> is coupled (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting) to an open end portion of a hose (e.g. rigid, flexible) or to the drain gun <NUM> or the drain gun <NUM> or a gas tank or a hose or an accessory nozzle or an adapter fitting or others, just like others, as disclosed herein, whether intermediary devices or sources of fluids. The second tubular portion <NUM> is coupled (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting) to an outlet of a drain line (e.g. conduit) that is clogged. The third tubular portion <NUM> is pointed to a safe direction or coupled (e.g. mechanical, chemical, fluid, fastening, mating, interlocking, adhering, magnetizing, bonding, friction, snug, nesting) to another tube or adapter therefor. Then, a pressurized fluid (e.g. gas, liquid, air, nitrogen, water) is input into the first tubular portion <NUM> (e.g. cartridge dispensation, drain gun, gas tank). Since the pressurized fluid is input at a high-volume and the pressurized fluid at the high-volume flows from the first tubular portion <NUM> to the third tubular portion <NUM>, then at least some of such flow creates a negative pressure (e.g. suction, vacuum suction) at the second tubular portion <NUM>. Since the second tubular portion <NUM> is coupled to the outlet of the drain line, the negative pressure pulls (e.g. suctions) at least some clogs within the drain line towards the outlet of the drain line and then into the second tubular portion <NUM> and then into the third tubular portion <NUM>, which expels those clogs.

In some embodiments, any devices, as disclosed herein, can be packaged, whether alone or with any others, whether disclosed herein or not, in a kit. For example, the kit can include a package (e.g. plastic bag, sealed bag, storage container, cardboard box, transport package, consumer package, bubble wrap, foam blanket, garment blanket, can, shrink-wrap, molded pulp, blister pack). For example, the package can include a cuboid box, a shipping box, an intermodal container, or others. The package can include one or more devices, as disclosed herein or not disclosed herein. Although various technologies, as disclosed herein, are described in context of HVAC or refrigeration systems, this disclosure is not limited to HVAC or refrigeration systems, but can be used in other contexts. For example, the drain gun <NUM> or the drain gun <NUM> can be used to pump inflatables (e.g. vehicular tires, wearable vests, balloons, bladders, water toys, sports balls).

As used herein, a term "or" is intended to mean an inclusive "or" rather than an exclusive "or. " That is, unless specified otherwise, or clear from context, "X employs A or B" is intended to mean any of a set of natural inclusive permutations.

As used herein, a term "or others," "combination", "combinatory," or "combinations thereof" refers to all permutations and combinations of listed items preceding that term. Continuing with this example, expressly included are combinations that contain repeats of one or more item or term, such as BB, AAA, AB, BBC, AAABCCCC, CBBAAA, CABABB, and so forth. Skilled artisans understand that typically there is no limit on number of items or terms in any combination, unless otherwise apparent from the context.

As used herein, 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 an art to which this disclosure belongs. Various terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with a meaning in a context of a relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, relative terms such as "below," "lower," "above," and "upper" can be used herein to describe one element's relationship to another element as illustrated in the set of accompanying illustrative drawings. Such relative terms are intended to encompass different orientations of illustrated technologies in addition to an orientation depicted in the set of accompanying illustrative drawings. For example, if a device in the set of accompanying illustrative drawings were turned over, then various elements described as being on a "lower" side of other elements would then be oriented on "upper" sides of other elements. Similarly, if a device in one of illustrative figures were turned over, then various elements described as "below" or "beneath" other elements would then be oriented "above" other elements. Therefore, various example terms "below" and "lower" can encompass both an orientation of above and below.

As used herein, a term "about" or "substantially" refers to a +/- <NUM>% variation from a nominal value/term. Such variation is always included in any given value/term provided herein, whether or not such variation is specifically referred thereto.

Although the terms first, second, can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections should not necessarily be limited by such terms. Thus, a first element, component, region, layer, or section discussed below could be termed a second element, component, region, layer, or section without departing from various teachings of this disclosure.

Example embodiments of this disclosure are described herein with reference to illustrations of idealized embodiments (and intermediate structures) of this disclosure. As such, variations from various illustrated shapes as a result, for example, of manufacturing techniques or tolerances, are to be expected. Thus, various example embodiments of this disclosure should not be construed as necessarily limited to various particular shapes of regions illustrated herein, but are to include deviations in shapes that result, for example, from manufacturing.

Any or all elements, as disclosed herein, can be formed from a same, structurally continuous piece, such as being unitary, or be separately manufactured or connected, such as being an assembly or modules. Any or all elements, as disclosed herein, can be manufactured via any manufacturing processes, whether additive manufacturing, subtractive manufacturing, or other any other types of manufacturing. For example, some manufacturing processes include three dimensional (3D) printing, laser cutting, computer numerical control routing, milling, pressing, stamping, vacuum forming, hydroforming, injection molding, lithography, and so forth.

Various corresponding structures, materials, acts, and equivalents of all means or step plus function elements in various claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. Various embodiments were chosen and described in order to best disclose various principles of this disclosure and various practical applications thereof, and to enable others of ordinary skill in a pertinent art to understand this disclosure for various embodiments with various modifications as are suited to a particular use contemplated.

Claim 1:
A device comprising:
a drain gun (<NUM>, <NUM>) including a handle (<NUM>, <NUM>) and a trigger (<NUM>),
wherein the handle includes a channel (<NUM>) and a plurality of valves (<NUM>), wherein the valves feed the channel, wherein the trigger is adapted to cause a staged release of a plurality of fluids from a plurality of cartridges to the channel via the valves when the cartridges are stored in the handle and feeding the valves.