Abstract: The invention describes a blower (1) comprising: a volute (10) for conveying air, a first tube (15) connected to the conveying volute (10), a second tube (50) adapted for being at least partially inserted in the first tube (15) and for sliding inside it along a sliding direction (A), and a fixing system of the second tube (50) to the first tube (15) in at least two positions, one of which is extracted and one is retracted.

Abstract: A gutter cleaner comprising: a fan assembly; a guide configured to at least partially support the fan assembly on a gutter, wherein the guide comprises a skid configured to slide along the gutter; a handle coupled to the fan assembly at a location adjacent to a first axial end of the handle; and a battery port disposed at a location adjacent to a second axial end of the handle, the second axial end of the handle being opposite the first axial end of the handle, wherein the gutter cleaner is supportable via the handle by an operator located at an elevation below the gutter, and wherein the gutter cleaner has an approximately neutral operational buoyancy.

Abstract: The gutter-cleaning device is configured for use in removing debris from a gutter. The gutter-cleaning device discharges a flow of water into the gutter that washes away the debris. The gutter-cleaning device is an extension apparatus that extends the reach of a client such that the client can discharge the flow of water into the gutter while standing on the ground. The gutter-cleaning device comprises a plurality of pipes, a plurality of fittings, a hose, and a nozzle. The plurality of fittings interconnect the plurality of pipes to form a fluid network. The fluid network is a fluid series circuit that transports water received under pressure from the hose to the nozzle. The nozzle discharges the water into the gutter that washes away the debris.

Abstract: A tool for cleaning gutters includes a specialized nozzle that may be attached to a leaf blower via a set of rigid tubing. The nozzle transitions from a tubular shape into a mouth-like opening with a first projection in opposed, spaced relation to a second projection. The tool is particularly well suited to removing debris from gutters with the nozzle in contact with a gutter and made to expel high-velocity air.

Abstract: A drain gun includes a handle and a trigger. The handle includes a channel and a plurality of inlets. The inlets feed the channel. The trigger causes a staged release of a plurality of fluids from a plurality of cartridges to the channel via the inlets when the cartridges are stored in the handle and feeding the inlets.

Abstract: Provided is a toilet clog removal device installed in a toilet bowl. The toilet clog removal device comprises cartridge provided in an upper portion of a toilet body and configured to generate or store gas with pressure; a toilet cover hinged to the cartridge and configured to open and close above a toilet seat and the toilet body. The cartridge stores a compound for generating the gas with pressure inside and, when the compound decomposes by igniting an igniter, the gas with pressure is generated and discharged from the cartridge.

Abstract: A toilet plunger is disclosed. It comprises a main body having an assembly groove, an air duct communicated with the assembly groove, a handle mounted at a back side thereof, and a penetration hole; a cup connected to a front side of the main body and communicated with the assembly groove by the air duct; an accommodation apparatus having a long slot for connecting a joint axis of the assembly groove pivotally and movably and assembling to the assembly groove, and an accommodation groove for accommodating a gas container; a trigger pivotally connecting the handle and having an elastic resetting element disposed between the trigger and the handle; and a pushing rod inserted into the penetration hole and having a pushing portion corresponding to the assembly groove, an elastic member disposed between the pushing portion and the main body, and a pulling portion.

Abstract: A device to unclog orifices in a workpiece is provided. The device includes a lower portion configured to receive the workpiece and an upper portion configured to secure the workpiece to the lower portion. The upper portion includes a tube configured to receive a piston. An unclogging material is placed in the tube portion, and the piston forces the unclogging material through the orifices.

Abstract: In the method for retreading a vehicle tire casing, a fluid is injected into a casing between a tread and a tread backing in order to space them apart.

Abstract: The invention relates to a method for the dynamic cleaning of supply ducts for drinking water in a vehicle (A), said method being noteworthy in that it consists in creating a shockwave (0) in the duct (210) to be cleaned. The invention also relates to a device for implementing said method. Applications: cleaning of water supply ducts in vehicles including aircraft.

Abstract: A method and system for a tone generator assembly are provided. The tone generator assembly includes a resonance chamber that includes a first end and a second end and a body extending therebetween. The body surrounds a cavity therein, wherein the first end includes a resonance chamber opening in flow communication with the cavity. The tone generator assembly also includes a nozzle having a bore therethrough. The bore includes an inlet opening configured to receive a flow of relatively high pressure fluid and an outlet opening coupled in flow communication with the inlet opening and configured to discharge an underexpanded jet of fluid when the flow of relatively high pressure fluid is received at the inlet opening. The resonance chamber and the nozzle are positioned relatively and sized to facilitate emitting a tone from the tone generator assembly having a frequency less than two kilohertz.

Abstract: Provided is a purging apparatus including an upper nozzle provided above an opening of the substrate storage container and configured to supply a dry gas obliquely downwardly to a side opposite to the substrate storage container and over the entire surface of the width of the opening; and a plurality of side nozzles provided at both sides of the opening of the substrate, respectively, and each configured to supply a dry gas towards the inside of the substrate storage container from an outside of the opening. The side nozzles are each longer than a height of the opening and formed with a plurality of supply holes supplying the dry gas at predetermined intervals in a vertical direction. The respective supply hole formed on one side nozzle and the respective supply holes formed on the other side nozzle are disposed alternately so as not to be located at the same height.

Abstract: The present invention relates to a method and an associated apparatus (1) for the recovery and regeneration of metal powder in EBM (Electron Beam Melting) applications. The method is of the type which envisages a step for recovery of weakly sintered powders inside a cleaning chamber (2) incorporating at least one compressed-air nozzle with supply, where necessary, of powder for sandblasting three-dimensional objects obtained by means of EBM sintering of the metal powders; according to the invention it is envisaged supplying into the cleaning chamber (2) metal powders having a predetermined low oxygen content and there is also a powder recirculating system (3) comprising at least one first buffer tank (9) inside which the regenerated powders are deposited for renewed supply of the aforementioned chamber (2).

Abstract: The present invention provides an automatic cleaning device, particularly to an automatic cleaning device for cleaning suction holes of a roller. In this case, the roller comprises a plurality of suction holes, and the automatic cleaning device comprises at least one blowing device. The blowing device is provided alongside the face of the roller so as to blow toward the suction holes of the rotating roller. By the use of the blowing device, not only blowing dust or dirt in the suction holes of the roller away so as to keep the suction holes clean and ventilated all the time, but also cleaning the suction holes by air blowing without the need for shutting down the roller so as to avoid the shutdown of roller to effect the production efficiency of product.

Abstract: A semiconductor fabricating apparatus includes a reaction chamber, a first gas pipeline, and a second gas pipeline. The first gas pipeline includes a first cleaning gas pipeline for providing a first cleansing gas to the reaction chamber in a cleansing process, and a second cleansing gas pipeline for providing a second cleansing gas to the reaction chamber in the cleansing process. The first cleansing gas pipeline and the second cleansing gas pipeline are connected in parallel. The second gas pipeline provides a reactive gas to the reaction chamber in a fabricating process. The first gas pipeline and the second gas pipeline are connected in parallel.

Abstract: A gutter cleaning attachment for a leaf blower comprises an elongated angled pipe assembly adaptably attached to an existing leaf blower. An upper portion of the attachment is inserted into the gutter portion of a structure allowing propelled air from the leaf blower to remove debris such as leaves, twigs, silt, insect nests, seed pods, and other similar items. The safety of the user is improved by avoiding the use of ladders or climbing on roofs to perform gutter cleaning.

Abstract: An apparatus for cleaning air filters utilizes a pressurized fluid flow, preferably air, to rotate a set of air spraying jets inside a hollow interior of a filter in order to remove particles from the filter. To ensure proper positioning of the jets in relation to the filter the present invention uses a set of plates with slots and pins, wherein the pins secure the apparatus on one end of the filter. The set of plates also at least partially blocks the flow of air out of the ends to more efficiently direct the flow of air from the jets to the filter. The jets then may be moved reciprocated along the length of the filter for cleaning purposes.

Abstract: A device installation and methods for extracting dust during the transfer of pulverulent products from a first container to a second container, the combination of the first container and of the second container forming, with the dust extraction device, a closed containment volume with connection between the two containers. A hollow connector with a side wall between its two ends defines an external wall and an internal wall so that the connector is pierced with several inlet pipes connected to hoses fed with a stream of pressurized fluid and also pierced with at least one fluid discharge pipe. The pipes projecting from said external wall of the connectors and opening onto the internal wall via orifices allows fluid to be introduced, the orifices being oriented relative to one another in such a way as to cause the fluid to flow in a cyclone within the connector, carrying with it any pulverulent product that remains on the internal wall and/or upstream and/or downstream of said connector.

Abstract: Among other things, one or more techniques and/or systems are provided for cleaning a polishing module of a semiconductor polishing apparatus. Purge air flow can be supplied into the polishing module (e.g., directed towards a polishing unit, a shield, and/or other polishing components) to create turbulence air flow within the polishing module. An auxiliary exhaust can be invoked to exhaust one or more particulates removed from the polishing module by the turbulence air flow. A purge air flow cycle can be performed by cycling the purge air flow and the auxiliary exhaust between on and off states. One or more purge air flow cycles can be performed during a main air flow cycle where laminar air flow is supplied into the polishing module and exhausted using a main exhaust. In this way, one or more particulates can be cleaned from the polishing module.

Abstract: A handheld nozzle cleaning device includes a cylinder and piston disposed within the cylinder. The piston is movable between a latched position, in which air is compressed, and an unlatched position, in which air is drawn into the cylinder. The handheld nozzle cleaning device also includes a valve and a nozzle disposed at one end of the cylinder. Manual operation of the piston, defined by linear movement of the piston in a first direction, both releases the piston from the latched position and draws air into the cylinder. The compressed air flows out of the cylinder through the nozzle when the valve is opened. Also, manual operation of the piston in a second direction opposite the first direction both compresses air within the cylinder and secures the piston in the latched position.

Abstract: Pilot light gas line connector assemblies and methods for cleaning a pilot light orifice are disclosed herein. An exemplary connector assembly for coupling to a pilot light gas line and cleaning a pilot orifice has a first fitting end, a second fitting end, and a passageway therebetween. The first fitting end is adapted to receive a first end of the pilot light gas line and the second fitting end is adapted to receive a valve capable of directing forced air from a forced air source into the second fitting end. Methods of cleaning a pilot orifice of a pilot light system include removing the pilot light gas line from a gas port and coupling the pilot light gas line to a pilot light gas line connector assembly. Then forced air is directed into the connector assembly and through the pilot light gas line, thereby cleaning the pilot orifice.

Abstract: A pulse detonation system is provided for delivering a shock wave to an operating device to clean accumulation or buildup of particles within the operating device. The pulse detonation system includes a support structure, a camera apparatus and a pulse detonation chamber. The pulse detonation chamber is supported by the support structure and extends into the interior portion of the operating device. The pulse detonation chamber receives fuel and air to create a shock wave. The shock wave exits the pulse detonation chamber and interacts with the buildup of particles in the operating device. The pulse detonation chamber includes a plurality of pulse detonation tubes that are detachable and portable, such that the pulse detonation system can be detached and moved from a first location to a second location.

Abstract: A method of in situ scale removal from a heat exchange body suspended in a wet cooling tower. At least one air blast is generated by a generator implementing controlled expansion via a nozzle of a mass of compressed gas in a nozzle towards a zone of the body. The generator is opened at a distance from the zone, and the method repeats the operation after moving the generator under the body outside the zone.

Abstract: An apparatus for cleaning air filters utilizes a pressurized fluid flow, preferably air, to rotate a set of air spraying jets inside a hollow interior of a filter in order to remove particles from the filter. To ensure proper positioning of the jets in relation to the filter the present invention uses a set of plates with slots and pins, wherein the pins secure the apparatus on one end of the filter. The set of plates also at least partially blocks the flow of air out of the ends to more efficiently direct the flow of air from the jets to the filter. The jets then may be moved reciprocated along the length of the filter for cleaning purposes.

Abstract: An apparatus for rinsing plastics material containers, with a conveying device which conveys the plastics material containers along a pre-set conveying path, with a plurality of spraying devices which act upon an inner space of the plastics material containers with a gaseous medium and which are designed to be movable at least locally with the plastics material containers, with a reservoir for the gaseous medium and at least one connecting line by way of which the reservoir is connected in terms of flow to the spraying devices. The apparatus has an ionizing unit which is arranged between the reservoir and the spraying devices and which ionizes centrally the gaseous medium arriving at the spraying devices.

Abstract: The present disclosure relates to a pulse cleaner for cleaning a diesel exhaust aftertreatment device. The pulse cleaner includes a cabinet, a diesel exhaust aftertreatment device mount positioned within the cabinet for mounting the diesel exhaust aftertreatment device during pulse cleaning, and a collection filter positioned within the cabinet for collecting material displaced from the diesel exhaust aftertreatment device during cleaning. The pulse cleaner can be equipped with features such as an exhaust aftertreatment device core temperature sensor, an air flow concentrator or an air swirling vane. The pulse cleaner can also include adapters for providing system compatibility with different styles of exhaust aftertreatment devices.

Abstract: The present invention discloses a hose evacuation attachment comprising a conical body, an accepting end at a first end of the conical body, and a narrowed opening at an opposing end from the accepting end, where the narrowed opening includes a smaller diameter than the accepting end. The hose evacuation attachment further includes a threaded neck extending from the narrowed opening, wherein the threaded neck fastens to a fitting at an end of a hose, and wherein the accepting end attaches to an end of an elongated tube of an air blower. Once attached the hose evacuation attachment serves as an intermediary to enable the air blower to evacuate an amount of water remaining within the hose.

Abstract: A cleaning apparatus may include a flow source such as a fan which creates air flow through a ventilation duct or other structure to be cleaned. A projectile source projects projectiles such as dry ice pellets proximate the structure to dislodge debris particles therefrom and introduce the dislodged debris particles into the air flow. An electrostatic precipitator removes the particles from the air flow. An upstream sensor may be used to detect the particles upstream of the electrostatic precipitator and determine if the structure is clean using a controller. A downstream sensor may be used to detect the particles downstream of the electrostatic precipitator and determine the efficiency of the electrostatic precipitator using the controller. Carbon dioxide within the air flow may also be detected.

Abstract: Method of removing the contents from a pipe (1)comprising forcing a gas flow through the pipe, the pipe having a pipe volume, an inlet end and an outlet end (9), characterized in that the gas flow is forced into the pipe (1) at the inlet end by applying a gas pressure decreasing from an initial pressure to a lower final pressure to remove at least parts of the contents from the pipe and maintaining that lower final pressure to remove the remaining contents from the pipe and apparatus for removing the contents from a pipe by forcing a gas flow through a pipe (1) having an inlet end and an outlet end (9), comprising gas flow generating means (5) and a container (3) having an inlet and having an outlet connectable to the inlet end of the pipe (1).

Abstract: Apparatus which has an electronic device housing; components housed within the housing; and a fluid flow conducting conduit within the housing and communicating with one of the components housed within the housing. The conduit enables conduction to the one component of a flow of pressurized fluid which removes accumulated debris from the one component. Method of cleaning in which a flow of pressurized fluid is directed to remove debris.

Abstract: The invention relates to a device (1) for extracting dust in the context of the transfer of pulverulent products from a first container (2) to a second container (3), the combination of the first container and of the second container forming, with the dust extraction device, a closed containment volume comprising, by way of means of connection between the two containers (2), (3), a hollow connector (10) having an open top end (11) and an open bottom end (12), comprising a side wall (13) between its two ends, said side wall (13) defining an external wall (14) and an internal wall (15), characterized in that said connector (10) is pierced with several inlet pipes (20) connected to hoses (40) fed with a stream of pressurized fluid and also pierced with at least one fluid discharge pipe (30), said pipes projecting from said external wall (14) of said connector (10), and opening onto said internal wall (15) via orifices (50) that allow the fluid to be introduced, said orifices (50) being oriented relative to one a

Abstract: A method and a device (50) for removing fragments and/or particles from containers, such as in particular glass tubes (5), provides means for adjusting the electrostatic force (40) in the tubes (5) and means for removing (60) of the fragments. The means for removing (60) can comprise a jet of fluid, of measured speed, put in the containers (5) by a nozzle (2), whereas the means for adjusting the electrostatic force (40) can comprise au element (1) for putting an electrically conducting fluid (8) with a measured resistivity in the containers (5). This way, the fluid (8), for example ionized air, acts in order to reduce and/or eliminate the electrostatic charge, and therefore the electrostatic force, between the fragments (30) and the surface of the containers, assisting the removal by means of jets of fluid or by suction means.

Abstract: A method of clearing a pipe of contents with an air system. The method may include providing air by the air system at high pressure and low velocity until the contents begin to move within the pipe, providing air by the air system air at low pressure and high velocity until a majority of the contents are removed from the pipe, and continuing to provide air at low pressure and high velocity until substantially all remaining contents are removed from the pipe.

Abstract: The invention relates to a working process for the treatment of an interior of a pipework system (1), which pipework system (1) includes a part-system (2, 21, 22) between a first connection (3, 31, 32) and a second connection (4, 41, 42), wherein the working process includes the following working steps: Providing a first working fluid (5, 51, 52, 53) being under an over-pressure (P+, P+1, P+2, P+3) with respect to an ambient pressure (P0). Providing a second working fluid (6, 61, 62, 63) being under a low-pressure (P?, P?1, P?2, P?3) with respect to the ambient pressure (P0).

Abstract: A system and method for restoring water supply pipes in buildings is provided. Compressed air is blown through one end of a cold water supply pipe, such as a cold water riser, and elsewhere on the pipe the cold water supply pipe is connected to the hot water supply pipe by an air hose. Compressed air may alternatively be blown through one end of the hot water supply pipe. To clean the pipe, abrasive particles are introduced into the stream of compressed air upstream of the section of pipe to be cleaned. To line the pipe, an epoxy coating is introduced into the stream of compressed gas upstream of the section of pipe to be lined.

Abstract: An attachment (10) for an inlet pipe (14) to a wet scrubber or other device comprises a sleeve (16) having an open end (18) adapted to be detachably connected to a flanged end (12) of the inlet pipe (14). A shaft (30) is moveable within the sleeve (16), and a scraper (34) is attached to one end of the shaft (30). The shaft (30) forms part of a pneumatic cylinder (40) attached to the other end of the sleeve (16). In use, the shaft (30) is reciprocally moved to cause the scraper (34) to dislodge particulates deposited within the pipe (14). Heated gas such as nitrogen or dry air is injected into the sleeve (16) to prevent scrubbing liquid from condensing within the sleeve (16) and thus inhibit particulate deposition therein.

Abstract: The present disclosure relates to a pulse cleaner for cleaning a diesel exhaust aftertreatment device. The pulse cleaner includes a cabinet, a diesel exhaust aftertreatment device mount positioned within the cabinet for mounting the diesel exhaust aftertreatment device during pulse cleaning, and a collector positioned within the cabinet for collecting material displaced from the diesel exhaust aftertreatment device during cleaning. The pulse cleaner includes dual flow concentrators for focusing flow at a partial volume of the exhaust aftertreatment device being cleaned.

Abstract: A duct cleaning apparatus and method for cleaning and maintaining the interior of most types of ducts, including chimneys, air conditioning and heating ducts, dryer ducts, vents, plumbing and rain gutter ducts. The apparatus is made up of a flexible rope (24) connected to a cleaning brush (10) or tool further connected to a retrieval parachute (30). The flexible rope (24) can be extended through the use of additional attached ropes (26) to create an infinitely long cleaning apparatus. The cleaning brush (10) may be configured in a variety of sizes with differing configurations of bristles (14) or appendages for specific applications. The cleaning appendages are connected to a rope (24) or line B, the length of which extends beyond the length of the duct (12) to be cleaned. One end of the rope (24) or line A is connected to the parachute (30) adapted with a wind-expanded periphery greater than that of the perimeter of the inside wall (22) of the duct (12) to be cleaned.

Abstract: Method of removing the contents from a pipe (1)comprising forcing a gas flow through the pipe, the pipe having a pipe volume, an inlet end and an outlet end (9), characterized in that the gas flow is forced into the pipe (1) at the inlet end by applying a gas pressure decreasing from an initial pressure to a lower final pressure to remove at least parts of the contents from the pipe and maintaining that lower final pressure to remove the remaining contents from the pipe and apparatus for removing the contents from a pipe by forcing a gas flow through a pipe (1) having an inlet end and an outlet end (9), comprising gas flow generating means (5) and a container (3) having an inlet and having an outlet connectable to the inlet end of the pipe (1).

Abstract: A device for cleaning a chimney preferably includes a cleaning head having a hub with brush arms extending from the hub, a cable assembly connected to the cleaning head and having a flexible cable surrounded by a casing, with the casing being sized to allow the cable to rotate in the casing without rotating the casing, at least one positioning assembly for holding the cleaning head a desired distance from the interior walls of a chimney, a motor attached to one end of the cable, and a positioning rod effective for pushing said cleaning head and cable assembly up a chimney for a distance of at least eight feet. A camera may be attached to the casing to allow observation and/or recording of the chimney while the cleaning head is working. The device may further include an air knife for dislodging debris when the device is used to sweep a chimney, and/or a vacuum for removing waste dislodged by the device.

Abstract: A method of in situ scale removal from a heat exchange body suspended in a wet cooling tower, wherein the method generates at least one air blast by means of a generator implementing controlled expansion via a nozzle of a mass of compressed gas in a nozzle towards a zone of the body, the generator being opened at a distance (H) from said zone, and the method consisting in repeating said operation after moving the generator under the body outside said zone.

Abstract: An apparatus for cleaning a continuous emissions monitor system that is in fluid communication with a flue stack conducting exhaust gas from a combustion source. The apparatus comprises a housing and a probe mounted in the housing. The probe is tubular and in fluid communication with the flue stack to acquire a sample of gas from the flue stack. The probe tends to have deposits from the exhaust gas accumulate on the inner walls of the probe. A device imparts cleaning energy to the probe for dislodging accumulated deposits from the inner walls of the probe.

Abstract: A device for clearing of fluid or gas passageways. The device uses a first cylinder having an external thread, and an internal piston. Another cylinder has an internal thread for screwing on the thread of the first cylinder for forcing the piston through the first cylinder. The first cylinder extrudes gas or liquid under pressure.

Abstract: The present application relates to a pneumatic device for cleaning ventilation ducts, which includes a guiding air hammer, a turning conduit, an air-supply pipe and a slewing mechanism for the conduit. The guiding air hammer has a hollow spherical or hemispherical shape and is connected to the turning conduit. A cleaning fumarole and a guiding fumarole are provided on the rear arc wall of the guiding air hammer. When in operation, the air-supply pipe stretching means retracts and stretches the air-supply pipe, which enables the guiding air hammer to clean out the dust on the inner walls and in the corners of a ventilation duct without the need of an operator entering the ventilation duct. The air-supply pipe stretching means may be controlled by manual operation or program composition. The device may be used for cleaning ventilation ducts with a polygonal section.

Abstract: A method for cleaning the interior walls of a storage tank comprises traversing over said walls a cleaning head supplied with air. The cleaning head may comprise a cleaning duct having an inlet and an outlet and a lateral opening which in use is sealingly arranged against the tank wall, whereby air flowing through the duct flows over and in contact with the tank wall. Cleaning materials, such as aggregate particles and cleaning fluid droplets, may be entrained in the air.

Abstract: Device for cleaning the filter pipes used to extract fruit juice, consisting of a cylindrically shaped tube (1) that runs telescopically through the inside of the filter pipe (2), and some circumferential openings (3) have been made at one end of this interior tube (1) through which previously injected pressurized air is expelled along its entire length The interior tube (1) includes an air inlet (5) that has been provided at one end, and this air inlet (5) is connected to a surrounding chamber (6) with the same configuration as the interior tube (1) and in turn is connected to the openings (3) that this tube has at its other end for cleaning the filter pipe (2).

Abstract: Device for cleaning the filter pipes used to extract fruit juice, consisting of a cylindrically shaped tube (1) that runs telescopically through the inside of the filter pipe (2), and some circumferential openings (3) have been made at one end of this interior tube (1) through which previously injected pressurized air is expelled along its entire length. The interior tube (1) includes an air inlet (5) that has been provided at one end, and this air inlet (5) is connected to a surrounding chamber (6) with the same configuration as the interior tube (1) and in turn is connected to the openings (3) that this tube has at its other end for cleaning the filter pipe (2).

Abstract: The present invention relates to a pneumatic device for cleaning ventilation ducts which includes a guiding air hammer, a turning conduit, an air-supply pipe and a slewing mechanism for the conduit. The guiding air hammer is of a hollow spherical or hemispherical shape, connected to the turning conduit and provided with cleaning fumarole and guiding fumarole on its rear arc wall. When cleaning the ventilation duct, according to the principle of air motion, the guiding air hammer cleans our of dust lain on the inner walls and in all the corners of the ventilation ducts with the air-supply pipe stretching means retracting and stretching the air-supply pipe, without an operator entering the ventilation duct. The air-supply pope stretching means may be controlled by manual operation or program composition. The design of the invention may be use for cleaning all ventilation ducts with polygonal section.

Abstract: A self-contained handheld drain clearing device is provided that uses compressed air to unblock various household drains and pipes. The device comprises an upper body and a lower body. The upper body includes a cylindrical chamber for housing a manual pump. A one-way inlet valve allows compressed air to enter a collection chamber, from which it exits to a storage chamber through a small hole in a piston. A trigger component is located in the upper body of the device, as is a pressure release safety component included for user protection. The lower body of the device primarily serves as a storage area for compressed air, containing an upper end and a lower end. The upper end contains threads for joining the lower body with the upper body, while the lower end contains a fitting for receiving various drain-sealing adapters.

Abstract: A method for cleaning a heat exchanging coil in an air conditioning unit using a low-pressure cleaning system to remove foreign particles that have accumulated on the heat exchanging coil. The low-pressure cleaning system discharges air at a low pressure, high velocity, and a high volume in order to clean the heat exchanging coil. Further, the low-pressure cleaning system can inject a substance into the discharge air flow to aid in cleaning the heat exchanging coil.