Abstract: An apparatus used to tune a stringed instrument string in a limited time period contains a cap, a spring, and a peg cover. When in use, the apparatus is placed over a tuning peg such that the peg cover encloses the tuning peg. The spring is positioned in between the cap and the peg cover. The cap is placed over the peg cover. Therefore the spring can be compressed by pressing on the cap. The cap contains a tubular portion and a first hole. The hole perpendicularly passes through the tubular portion. The peg cover contains a peg receiving cavity and a second hole. The second hole perpendicularly passes through the peg receiving cavity. When the spring is compressed the first hole and the second hole align with each other. The first hole and the second hole are perimetrically large enough for a stringed instrument string to travel through.

Abstract: A device for depressing the strings of a musical instrument, including a foot-operated pedal portion having a plurality of pedals operatively coupled to a control device, the pedals arranged chromatically and corresponding to major chords; a second foot-operated portion including toggles for modifying the major chords; and a hands-free string-engaging portion operatively coupled to the pedal portion. The string-engaging portion includes a plurality of actuators configured to overlie and depress the strings of the stringed musical instrument. The pedal portion also may include a control device operably coupled to and configured to receive input signals from the pedals and toggles, and the control device may be operably coupled to and configured to send output signals to the actuators, such that depressing one of the pedals causes the actuators corresponding to a predetermined chord to be depressed.

Abstract: A decorative drum pad and cymbal cover that includes a back plate with a back side and a top side, the back plate is secured in position by a cymbal or drum stand and a mounting, the mounting removably secures the back plate to the cymbal stand and an image holding area placed on the top side of the back plate. The decorative drum pad and cymbal cover also includes a protective cover placed on top of the image holding area, the protective cover protects the image holding area from a plurality of drumstick strikes from a user and an drum trigger that includes a back side and an electrical signal outlet jack, the electrical signal outlet jack is attached to the back side of the back plate with one or more fasteners and the electrical signal outlet jack is disposed on the back side of the drum trigger.

Abstract: Embodiments generally relate to music devices. In one embodiment, an apparatus includes a musical instrument keyboard including a keyboard body and a key. The key is operable by a user to cause movement of the key. The apparatus also includes one or more magnets positioned to affect the movement of the key.

Abstract: Techniques for analyzing a musical performance of a sequence of events. The events have parameters, such as timing, pitch and dynamics. A processor inputs (1-2) the performance; accesses (1-4) a standard performance of the musical piece; identifies (1-6) and compares (1-8) mutually corresponding events and determines (1-10) one of a set of classes: correct”, “low” or “high”. A current marker is displayed on an area of a display. The marker's position depends on the classification and the position of the previous marker, whereby trends and changes in performance accuracy are easily detected during performance.

Abstract: A digital piano includes a keyboard comprising a plurality of keys; LED prompting lights corresponding to and disposed on the keys; a mode selector for making the digital piano at least work in a LED rectifying mode; a sound engine configured to receive an input note information relative to a key pressed and convert the input note information into a first note data; a digital music sheet processor configured to receive the first note data in real time from the sound engine, to compare an input note corresponding to the first note data with the note of a preset music sheet based on the preset music sheet and the first note data when the mode selector selects the LED rectifying mode and to determine whether to continue to play; at least one speaker configured to send out a sound according to a sound signal corresponding to the first note data.

Abstract: A music box includes a star wheel, a stopper, a sun wheel, a motor, a sensor, and a controller. The star wheel is configured to rotate about a first shaft. The sun wheel is fixed on a second shaft and engages the star wheel. The motor is configured to rotate the first shaft and the second shaft. The sensor is configured to detect a rotation state of the sun wheel. The controller is configured to: read a music data; control the motor to rotate at a rotational speed based on a temp; determine a start timing at which the stopper starts to release the star wheel based on a sound output timing and the rotation state; calibrate the start timing to a calibrated start timing based on a value related to the rotational speed; and control the stopper to release the star wheel at the calibrated start timing.

Abstract: The Pole Position Sliding Pickup System changes the way tonal variety is arrived at by electric guitar players. Rather than installing multiple pickups in different positions in order to achieve a limited variety in tone, the Pole Position Sliding Pickup System uses a single pickup which can be moved quickly and easily to any position between the base of the neck and the bridge in order to achieve a much greater variety in tone. Not only are the variety of possible tones increased, but so is the ease with which they can be attained, because the method of sliding the pickup into place is easier than conventional methods of choosing stationary pickups.

Abstract: Exemplary embodiments are directed to a method and system for defining addresses for a networked switching system, controlling and enabling user control over the detonation of a plurality of explosive devices, and setting a plurality of charges located remotely down-hole beneath the earth's surface.

Abstract: A rigid ballistic-resistant composite includes large denier per filament (dpf) yarns. The yarns are held in place by a resin to form a rigid composite panel with improved ballistic performance. The large dpf yarns may be selected from aromatic heterocyclic co-polyamide fibers, polyester-polyarylate fibers, high modulus polypropylene (HMPP) fibers, ultra high molecular weight polyethylene (UHMWPE) fibers, poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers, poly-diimidazo pyridinylene (dihydroxy)phenylene (PIPD) fibers, carbon fibers, and polyolefin fibers.

Abstract: The present invention relates to a bullet-proof glass pane, in particular for use in a motor vehicle, comprising a ballistic block comprising a plurality of panes of glass, ceramic or plastic material bonded to each other over their surfaces in a layered composite, and interposed bonding interlayers of plastic material, wherein at least one bullet-resistant strip is provided, having, in particular, an essentially rectangular cross-section and covering the ballistic block of the bullet-proof glass pane at its peripheral edge.

Abstract: A hydraulic motor includes a motor mechanism that rotates by hydraulic liquid that is supplied/discharged from a hydraulic liquid pressure source through one of a first motor passage and a second motor passage. The hydraulic motor comprises a casing that defines a casing chamber which accommodates the motor mechanism, and a flushing passage that is in communication with the casing chamber and extracts a portion of the hydraulic liquid from a low pressure side among the first motor passage and the second motor passage and leads it to the casing chamber.

Abstract: On an inner surface of a housing, a nozzle for jetting operation oil is provided at a position opposite to an outer circumferential surface of a cylinder block. With this configuration, by spraying the operation oil from the nozzle to the outer circumferential surface of the cylinder block during rotation of the cylinder block, this operation oil can remove frictional heat generated by sliding between a piston and a cylinder, and seizure of the piston and seizure of the cylinder can be prevented.

Abstract: A rotary drive system includes a cylinder wall, a piston axially slidable along a longitudinal axis within the cylinder wall and a piston rod extending along the longitudinal axis and projecting at a drive side of the system axially beyond the cylinder wall. The piston rod is at the drive side attached to a carrier support member. A rotatable annular cam member extends at an axial cam position that is spaced at a distance from the drive side, coaxially around the cylinder wall. A carrier carries at a support side a pair of rollers engaging on opposed cam surfaces of the cam member, the carrier extending radially outwardly from the cylinder wall from the cam position to the carrier support member and being with a connecting end detachably connected to the carrier support member. The carrier includes an arm provided with a flexible section.

Abstract: A rotary actuator includes a housing having an interior boundary that defines a central bore and has interior recesses, a chamber housing assembly disposed in the central bore and having an arcuate chamber, the arcuate chamber comprising a cavity, an exterior boundary of the chamber housing assembly having exterior recesses, each of the exterior recesses aligned with a respective one of the interior recesses, pins residing between the interior boundary and the exterior boundary, each of the pins mated to one of the exterior recesses and a corresponding one of the interior recesses to maintain an orientation of the chamber housing assembly with respect to the housing, a rotor assembly rotatably journaled in the chamber housing assembly and comprising a rotary output shaft and a rotor arm, and an arcuate-shaped piston disposed in the chamber housing assembly for reciprocal movement in the arcuate chamber.

Abstract: An output rod (27) is inserted in a housing (4) so as to be movable vertically. A first piston (41) inserted in a lower part of the housing (4) is fixed to the output rod (27). A second piston (42) inserted on an upper side of the first piston (41) is fitted on the output rod (27) so as to be movable vertically. A lock chamber (44) is provided between the first piston (41) and the second piston (42). A first release chamber (51) is provided below the first piston (41). A second release chamber (52) is provided above the second piston (42). During force multiplication driving of the output rod (27), a pressurized fluid in the lock chamber (44) carries out the force multiplication driving with respect to the output rod (27) downward via the second piston (42) and engaging balls (69). A retaining spring (60) which biases the second piston (42) upward is provided in the lock chamber (44) between the first piston (41) and the second piston (42).

Abstract: A solution treatment apparatus connected to a supply nozzle that supplies a treatment solution to a substrate, includes: a supply pipeline connecting a treatment solution storage container and the supply nozzle; a filter apparatus provided in the supply pipeline; a pump on a secondary side of the filter apparatus; a circulation pipeline connecting a discharge side of the pump and an intake side of the filter apparatus; a supply control valve provided in the supply pipeline on a secondary side of the pump; a circulation control valve provided in the circulation pipeline; and a control unit, wherein the control unit opens the circulation control valve and drives the pump when supply of the treatment solution from the supply nozzle to the substrate is stopped by closing the supply control valve, to thereby circulate the treatment solution between the supply pipeline having the filter apparatus and the circulation pipeline.

Abstract: The invention is directed to a direct replacement filter within an air flow channel having a housing with an at least one exposure slot. An at least one filter media storage area is within the housing having unexposed filter media stored therein. The unexposed filter media being pleated, folded, and stacked and compactly held within the at least one filter media storage area. A controller controls an at least one movement member that moves an unexposed portion of the at least one filter media into the at least one exposure slot in a pleated state and exposes the unexposed portion of the at least one filter media to the air flow channel creating a pleated, exposed portion of the at least one filter media. One or more sensors are provided and the controller communicates with these sensors. A containment area is also provided, wherein the pleated, exposed portion of the at least one filter media is collected and retained within the containment area.

Abstract: This invention relates to high hydrocarbon resistant chemically cross-linked aromatic polyimide polymers, membranes and methods for making and using these polymers and membranes. The high hydrocarbon resistant chemically cross-linked aromatic polyimide membrane described in the present invention comprises a plurality of repeating units of a first aromatic polyimide comprising hydroxyl groups cross-linked with a second aromatic polyimide comprising carboxylic acid groups via covalent ester bonds. These membranes exhibit high permeability and selectivity in separation of mixtures of gases and liquids.

Abstract: A degassing module is adapted for degassing a liquidous fluid at relatively high throughput flow rates. The degassing module includes a tubular separation membrane that is helically wound within an interior chamber of a degassing module housing. The helically wound tubular separation membrane is disposed in an axial flow gap of predetermined proportions that maximizes fluid flow dynamics in reducing the gas transport resistance from the liquid phase across the membrane. Typically, the helically wound tubular separation membrane is positioned in the gap with radial spacings to surfaces bounding the gap, thereby forming axial flow channels circumaxially inwardly and/or outwardly of the wound tubular membrane.

Abstract: A holding tank cover includes a gas permeable insulating membrane and a gas impermeable cover layer sized to overlay and conceal the gas permeable membrane. Together, the gas permeable membrane and the gas impermeable cover layer facilitate a controlled transmission of gas between an interior of the holding tank and an environment external to the holding tank.

Abstract: The present invention relates to hydrosilylation-curable silicone compositions that include an alkenyl-functional trialkylsilane compound. The present invention relates to a membrane including a cured product of the hydrosilylation-curable silicone composition. The present invention also relates to a method of making the membrane, and a method of separating components in a feed mixture using the membrane.

Abstract: An aircraft fuel tank flammability reduction method includes feeding pressurized air into an air separation module containing an oxygen separation membrane. The method includes contacting the separation membrane with the air feed, permeating oxygen from the air feed through the separation membrane, and producing nitrogen-enriched air from the air separation module as a result of removing oxygen from the air feed. The NEA from the air separation module is substantially cooled in a NEA flow heat exchanger and the substantially cooled, nitrogen-enriched air is fed into the fuel tank on board the aircraft. An aircraft fuel tank flammability reduction system includes a NEA flow heat exchanger configured to cool substantially the nitrogen-enriched air from the air separation module and a fuel tank on board the aircraft configured to receive the cooled nitrogen-enriched air.

Abstract: Vapor-liquid contacting apparatuses and methods for removing contaminants from gas streams are provided. In an embodiment, a vapor-liquid contacting apparatus includes a vortex contacting stage having a contacting zone bound by a wall and defining an axis, a radially inner region surrounding the axis, and a radially outer region adjacent the wall. The vapor-liquid contacting apparatus also includes a feed conduit configured to direct flow of a feed gas into the radially outer region of the contacting zone in a direction tangential to the axis to form a vortex. Further, the vapor-liquid contacting apparatus includes a liquid conduit configured to deliver a liquid absorbent stream to the radially inner region in the contacting zone.

Abstract: Embodiments of apparatuses and methods for removing acid gas from sour gas are provided. In one example, an apparatus comprises an absorption zone. The absorption zone is configured for contacting the sour gas with an absorbent solvent that is at a first predetermined temperature of less than about 0° C. to remove the acid gas and form a treated gas stream that includes entrained absorbent solvent. A heat exchanger or heater is configured to heat the treated gas stream to a second predetermined temperature of greater than about 0° C. to form a partially heated treated gas stream. A water wash zone is configured for contacting the partially heated treated gas stream with water to remove the entrained absorbent solvent and form a solvent-depleted treated gas stream.

Abstract: In one implementation, a substance removal apparatus may include a collection unit and a removal unit. The collection unit may have a structure forming a channel and an inlet to receive an exhaust from a print system. The removal unit may separate a substance from the exhaust and transfer heat from the exhaust to the print system. The removal unit may include a heat exchanger and an impaction mechanism.

Abstract: Provided is a method for preparing a membrane for flue gas separation including a crosslinked thermally rearranged poly(benzoxazole-co-imide) through the transesterification crosslinking of an ortho-hydroxy polyimide copolymer and a diol compound, followed by thermal rearrangement. The membrane for flue gas separation including the crosslinked thermally rearranged poly(benzoxazole-co-imide) has excellent gas permeability and selectivity, and particularly provides gas separation quality corresponding to a level exceeding the so-called 2008 upper bound in terms of carbon dioxide/methane separation.

Abstract: Provided is a crosslinked thermally rearranged poly(benzoxazole-co-imide) obtained through the transesterification crosslinking of an ortho-hydroxy polyimide copolymer and a diol compound, followed by thermal rearrangement, a gas separation membrane (excluding a membrane for flue gas separation), and a method for preparing the same. The crosslinked thermally rearranged poly(benzoxazole-co-imide) according to the present invention allows less packing of polymer chains and has a structure with a larger space, and thus shows increased possibility of permeation and diffusion of small molecules therethrough.

Abstract: A central air freshener comprising an air filter, where the air filter includes a filter material to trap a plurality of air pollutants pumped from a central AC unit; a plurality of slats within the air filter, where the plurality of slats support the filter material; and an air freshener attached between at least two of the plurality of slats, where the air freshener provides a fragrance that is distributed as the central AC unit pumps air through a building. The air fresheners are exchangeable once used and to change the fragrance distributed.

Abstract: A beer making system may use a detachable vessel to contain liquid during the mashing and boiling steps, and may also be used during the fermentation steps of beer making. The beer making system may recirculate liquid through the vessel, then select between several flow paths during the beer making process. A removable reservoir system having a grain reservoir and several hops or adjunct reservoirs may be selected as a flow path, as well as a bypass flow path. A programmable controller may cause liquid to recirculate through a heater and one of the various flow paths, the sequence, timing, and temperature profile of which are defined in a recipe for a particular beer.

Abstract: A beer making device may have removable reservoirs through which brewing ingredients may be added. The removable reservoir may include a grain steeping reservoir and one or more adjunct or hops steeping reservoirs. A removable tub may contain the various reservoirs, and some or all of the various ingredient reservoirs may be removable from the reservoir tub. For example, a set of hops reservoirs may be manufactured as a single joined unit, and may be removable from the reservoir tub. The removable reservoirs may include a check valve which may shut off flow when the reservoir may be removed or dislodged, thereby minimizing leakage, and a beer making device may further sense such a situation and cause operations to cease.

Abstract: A cascading hops reservoir may have a series of hops or adjunct reservoirs, each having a drain and an overflow. The series of reservoirs may be used by causing flow through a first reservoir, which may cause liquid to flow through the reservoir and through the drain, as well as past an overflow. When a second set of hops or adjuncts may be added, the flow may be introduced to a second reservoir, which may flow through a drain and also overflow into the first reservoir. A series of multiple reservoirs may thus be used to introduce hops or other adjuncts into a brewing cycle in stages, with each additional stage including previous stages in the recirculating flow during the brewing cycle.

Abstract: The invention relates to an apparatus (APP) for preparing a beverage from a solvent (S) and ingredients (IG). The apparatus comprises: a container (CO) for containing the solvent, an infuser (IF) for containing the ingredients, and said infuser being placed in the container (CO), a system (SYS) for carrying the solvent from the container (CO) into said infuser (IF) at a given flow rate (Rin), an arrangement (AR) for carrying the solvent from said infuser (IF) into the container (CO), and for regulating the output flow rate (Rout) of said solvent to an average value corresponding to the given input inflow rate (Rin). This apparatus allows the amount of solvent inside the infuser to remain constant in order to guarantee optimal brewing of the ingredients.

Abstract: An automatic jam and jelly maker has a base assembly having a motor, a heater subassembly, a user interface, and a control module. The automatic jam and jelly maker also has a pot assembly removably receivable on the base assembly, a stirrer assembly removably receivable in the pot, a colander removably receivable in the pot, and a lid assembly removably receivable on a lip retaining lip of the colander. The automatic jam and jelly maker has a cook mode used to make jam or jelly in which the stirrer assembly is received in the pot and rotated and ingredients are heated. The cook mode includes a jam mode and a jelly mode. The automatic jam and jelly maker may also include a steam mode used to extract juice from fruit.

Abstract: A cooking apparatus includes a bottomed-box-shaped container that contains an object; a discharging path through which at least part of hot air is discharged to the outside; an exhaust adjustment unit that adjusts the flow rate of discharge of the hot air through the discharging path; and a controlling unit that controls the exhaust adjustment unit, wherein the controlling unit controls the exhaust adjustment unit in such a manner that the flow rate of discharge of the hot air during a heating operation falls within a predetermined condition.

Abstract: A food packaging apparatus includes a bowl, a lid, and a seasoning package, where the lid is selectively positioned with the bowl in between a closed configuration and an opened configuration. The closed configuration enables the food packaging apparatus to store frozen food and cook the stored frozen food through a steamer. The opened configuration allows the users to access the cooked food within the food package apparatus. The food packaging apparatus is made from biodegradable and compostable material in order to eliminate the plastic or paper wastage, minimize environmental impact of the production and disposal of the packaging apparatus, and the leaching of harmful chemicals during the steaming process.

Abstract: A steamer for foodstuffs has a lidded pot enclosing a stepped steaming platform adapted to support various foodstuffs at different levels dictated by the intensity and duration of their cooking requirements.

Abstract: A grill device which has a frame in which heating means are arranged below a grate. The heating means have a grease-deflecting cover supported on the frame and has oblique guide plates for dripping grease below the heating means, via which the dripping grease can be directed towards a collecting channel. The grate (2) is arranged on a support (1.1) on the upper edge region of the frame (1) and is divided into grate sections. The grease-deflecting cover (3) is made of flat fins (3.1-3.m) that are arranged in sequence like blinds and are adjustably arranged above the heating means (4). The guide plates (5) are divided into overlapping guide plate sections (5.1, 5.2) which can be removed from the frame (1).

Abstract: The present invention relates to a cooking oven provided for heat transfer by convection, in particular for a domestic appliance. The cooking oven comprises at least one top convection fan (12) arranged in a central portion of a top wall of an oven cavity (10) and at least one rear convection fan (14) arranged in a central portion of a rear wall of the oven cavity (10). The cooking oven comprises at least one top heating element (16, 18) arranged in an upper portion of the oven cavity (10) and below the top wall of said oven cavity (10) and at least one rear heating element (40) arranged in a rear portion of the oven cavity (10) and in front of the rear wall of said oven cavity (10). The top convection fan (12) and the rear convection fan (14) are axial fans. At least one top propeller (32) of the top convection fan (12) and at least one rear propeller (36) of the rear convection fan(14) are arranged inside the oven cavity (10).

Abstract: A compacting apparatus including: a compression plate, a piston having a surface facing the compression plate, and a drive mechanism configured to alternately move the piston towards and away from the compression plate such that an object may be compacted between the compression plate and said surface of the piston, wherein the drive mechanism can be positioned inside or partly outside the piston. Also, a reverse vending machine comprising such a compacting apparatus, use of such a compacting apparatus, and a method of compacting objects.

Abstract: A method of continuously imparting different visually detectable features to a plurality of items using a printing and/or embossing roll is provided. The circumference of the roll differs from the whole number of the item lengths. In a production series, the number of items each having a different visually detectable feature provided before said visually detectable features repeat themselves is greater than the number of items imparted after one full turn of the roll. Also disclosed is a package including a plurality of items each having a visually detectable feature that is different from the visually detectable features of all other items within the package, such that a first item includes a first visually detectable feature, and a second item includes a second visually detectable feature including at least a portion of the first visually detectable pattern element, wherein the first and second visually detectable features are different.

Abstract: A recording apparatus includes: a transport mechanism that transports a recording medium having a lenticular lens in a transport direction; and a guide that includes a convex portion formed along the transport direction and guides the recording medium in the transport direction by allowing the convex portion to come in contact with the lenticular lens.

Abstract: A liquid supply assembly for use with a printing system of a type in which a liquid is deposited from the liquid supply assembly in a receiving region on a plate and any excess of the liquid in the receiving region is scraped from the plate by the liquid supply assembly. To this end, the liquid supply assembly employs a reusable cup, a disposable cup insert and a scraping element. As assembled, the reusable cup includes a reusable liquid reservoir, the disposable cup insert includes a temporary liquid reservoir holding the liquid within the reusable liquid reservoir, and the scraping element includes a conduit facilitating a flow of the liquid held by the temporary liquid reservoir through the conduit to the plate.

Abstract: A lithographic printing plate precursor includes at least a white substrate and an image-recording layer, the white substrate has a reflection density of 0.25 or less at a side having the image-recording layer, and the image-recording layer contains an infrared absorbing agent, an onium salt polymerization initiator, a polymerizable compound and a color-forming compound and is capable of being removed with at least any one of printing ink and dampening water.

Abstract: Shot shell payloads that include a plurality of large projectiles and shot shells including the same are disclosed herein. The shot shell payloads include a plurality of large projectiles and at least one spacer that is formed from a different material than the large projectiles. A spacer is located between adjacent large projectiles and/or separates adjacent large projectiles. Disclosed shot shell payloads also may include one or more end spacers that are positioned to contact just one large projectile or the plurality of large projectiles in the payload.

Abstract: The present invention relates in general to a pressure discharge mechanism for closed vessels having an internal chamber designed to hold volatile and/or explosive substances in a sealed manner comprised of an at least one eutectic composition and a threaded joint designed to open or vent the closed vessel when the contents of the closed vessel reaches a predetermined temperature while maintaining full structural integrity during normal operation. In one aspect, the closed vessel is a munitions casing which functions as intended under normal operating environments, but then when exposed to extreme temperatures, reduces the munition's high order explosion capability, and is transformed into a safe, low order reaction with significantly less reactive potential. In one aspect, the closed vessel is a transport tanker which should not release substances contained therein. However, if the tanker catches fire, the pressure relief mechanism of the present invention reduces risk of explosion.

Abstract: A cable transportation system has rails and a draw cable, both extending along a transportation path, a drive member for driving the draw cable; at least one vehicle, which moves along the transportation path and has wheels which roll along the rails, and a coupling device for connecting the vehicle to the draw cable, at least one passenger station where the vehicle is stopped and an electric machine located on the vehicle and driven by the wheels to generate electric power.

Abstract: This vehicle includes a guard rail intended to occupy a lowered position delimiting a closed space that prevents a passenger from falling and a raised position in which the guard rail opens up the space at the front of the vehicle to allow one or more passengers to board and disembark. The vehicle also includes means for locking the guard rail in the lowered position, wherein the locking means includes a locking lever having a first end provided with a bearing surface and with a blocking surface, the bearing surface and the blocking surface delimiting a first housing intended to accommodate part of the guard rail, and a second end in which a locking member designed to immobilize the second end of the locking lever is intended to engage when the guard rail is in the lowered position.

Abstract: According to one embodiment, a motor for a vehicle includes a casing accommodating a rotor and a stator iron core inside thereof, and supporting each of both axial ends of the rotor shaft via a bearing, an air inlet port formed in a portion of the casing outside the bearing in the radial direction, and a fan provided between the rotor iron core and the bearing and rotating with the rotor shaft, wherein a portion of the casing positioned outside impellers of the fan in the axial direction forms a first housing and a second housing constituting a discharge channel, and the first housing includes a guide wall extending toward the outside in the radial direction, and the second housing includes a thinned wall portion located inside the guide wall in the axial direction to constitute the discharge channel between the thin wall portion and the guide wall.

Abstract: A gangway floor for a gangway between a first car of a multi-car vehicle and a second car of said vehicle comprises a first floor panel and a second floor panel, wherein the first floor panel is arranged to rotate about a first axis that does not lie in the plane that the first floor panel lies in, and the second floor panel is arranged to rotate about a second axis that does not lie in the plane that the second floor panel lies in, wherein the first axis is different from the second axis.