Abstract: An object of the present invention is to provide a structural body that has high vibration damping and high sound-insulating performance which exceeds mass law while being relatively light weight, that is highly flexible in design, excellent in versatility, and easy to manufacture so that productivity and economic efficiency can be improved. The object thereof is achieved with a sheet member having a sheet of rubber elasticity and a resonant portion, wherein the resonant portion is provided in contact with a surface of the sheet, the resonant portion including a base part and a weight part, and the weight part being supported by the base part and having a larger mass than the base part.

Abstract: The invention concerns a hybrid part (11) for a motor vehicle, comprising at least one metal insert (1) overmoulded in a layer of plastic or composite material (17), the insert (1) being at least partially covered on at least one of its faces (7a, 7b) by a layer of material of a given thickness; and comprising at least one relief (5) extending from one of its faces (7a, 7b). The height exhibited by the relief or reliefs (5) is less than or equal to the thickness of the layer of plastic or composite material overmoulded on said face (7a, 7b) of the insert (1), so that the contact between the reliefs (5) and the walls of the mould ensures the positioning of the insert (1) in the mould during the overmoulding operation.

Abstract: Acoustic loudspeaker (10) comprising a cabinet (12) extending in a direction (L), and a speaker (14) defining an acoustic axis (X). The cabinet defines a first axis (V1) perpendicular to the direction, and a second axis (V2) perpendicular to the direction and to the first axis. The acoustic loudspeaker is intended to be used in a first configuration, wherein the first axis is essentially vertical, and a second configuration, wherein the second axis is essentially vertical. The speaker is movable relative to the cabinet around an axis of rotation (D) between a first position, wherein the acoustic axis defines with the second axis a first angle less than 30°, and a second position, in which the acoustic axis defines with the first axis (V1) a second angle less than 30°. The axis of rotation makes two angles between 40° and 50° with the first axis and the second axis.

Abstract: An acoustic device includes a speaker unit, a support body, and a vibration damping member. The support body has lower mobility than a member on which the speaker unit is mounted. The vibration damping member is provided between the speaker unit and the support body or between the member on which the speaker unit is mounted and the support body.

Abstract: A cooling unit has a member-to-be-cooled, a duct, and a cushioning material. The member-to-be-cooled has a plurality of cooling fins. The duct is fixed to the member-to-be-cooled, has a partition wall facing the plurality of cooling fins, and conveys a fluid to around the plurality of cooling fins. The cushioning material is disposed between the partition wall and the plurality of cooling fins and fixed to the partition wall.

Abstract: Provided are a partition member including a soundproof structure capable of efficiently insulating noise with a lightweight configuration, and an electronic device and a vehicle using the partition member. In the partition member including the soundproof structure, the soundproof structure includes a support body having an opening, and a membrane-like member that is fixed to an opening surface of the support body in which the opening is formed and that vibrates as noise is incident, and a rear surface plate fixed to the support body on a side opposite to the membrane-like member, and the soundproof structure absorbs a sound by a resonance structure formed by a rear surface space surrounded by the rear surface plate, the membrane-like member, and the support body and the membrane-like member, and insulates a sound having a frequency higher than a relative maximum resonance frequency at which a sound absorption coefficient becomes a relative maximum among resonance frequencies of the resonance structure.

Abstract: An acoustic attenuation structure includes a periodic structure having a first unit cell, the first unit cell having a first central body and a first axial tube disposed on the first central body and a second axial tube disposed on the first central body, opposite the first axial tube, each of the first axial tube and the second axial tube being in fluid communication with one another through the first central body.

Abstract: An acoustic metamaterial (AMM) passive impedance matching technique to enhance the acoustic performance of porous/poro-elastic sound absorbing materials is disclosed. An AMM passive matching device is implemented by achieving negative refractive index with double negative parameters, i.e., negative effective mass density and effective bulk modulus scheme, using various acoustic elements. The AMM technique consists of meta material architecture of acoustic inductive open tubes positioned strategically around the outside surfaces of the porous media and perforated screens inserted inside porous media to generate complex acoustic impedance load of the porous media; the inductance defined by a predetermined lengths of the open tubes. The device includes open tubes extending from the porous media to the outside ambient medium generating the desired reactive load over the broadband frequency region of the complex acoustic impedance of the porous media.

Abstract: Provided is a soundproof structure that is small and light and can reduce noise with a high natural frequency of a sound source at a plurality of frequencies at the same time. The soundproof structure according to the embodiment of the present invention includes a plurality of membrane-like members that are overlapped to be spaced from each other, a support that is made of a rigid body and supports each of the plurality of membrane-like members so as to perform membrane vibration, an inter-membrane space that is sandwiched between two adjacent membrane-like members among the plurality of membrane-like members, and a rear surface space that is formed between one membrane-like member at one end of the support in the support among the plurality of membrane-like members and the one end of the support, in which each of the plurality of membrane-like members absorbs a sound by performing the membrane vibration in a state where the one end of the support is closed.

Abstract: An electronic device including a holder, a first buffer element, a second buffer element and a loudspeaker is provided. The holder includes a first section and a second section perpendicular to the first section. The first section and the second section are respectively provided with a first opening and a second opening. The first buffer element is disposed in the first opening of the first section. The second buffer element is disposed in the second opening of the second section. The loudspeaker is supported on the housing by the holder. The first buffer element is connected to the loudspeaker, and the second buffer element is connected to the housing.

Abstract: To monitor hydraulic fracturing operations, an acoustic insulation tool acoustically insulates a wellhead installed at a surface of a wellbore. Multiple acoustic sensors attached to the wellhead sense acoustic signals generated responsive to operation of hydraulic fracturing components. The components perform hydraulic fracturing operations within the wellbore. The acoustic insulation tool acoustically insulates the wellhead from acoustic signals generated by sources other than the hydraulic fracturing components. The multiple acoustic sensors transmit the sensed acoustic signals to a computer system. Using the received acoustic signals, the computer system monitors the hydraulic fracturing operations performed within the wellbore.

Abstract: A phononic composite material providing structural strength and blocking the propagation of elastic waves over a frequency range referred to as the bandgap. In one embodiment, the phononic composite material consists of a plurality of periodic units, each of which includes a central fiber, a relatively soft interface layer surrounding the fiber, and a matrix layer surrounding the interface layer. The properties of the interface layer may be adjusted, e.g., by adjusting the temperature of the phononic composite material, to transition from a state with a bandgap to a state lacking a bandgap.

Abstract: A casing spacer that fits around a carrier pipe at various intervals along the length of the carrier pipe for the purpose of positioning the carrier pipe within a casing pipe. The casing spacer is equipped with roller assemblies on the outside surface of the casing spacer. The roller assemblies are protected by guards to help the roller assemblies avoid obstacles that may exist on the inner surface of the casing pipe.

Abstract: Provided is a soundproof structure that is small and light and can sufficiently reduce noise with a high natural frequency of a sound source. There is provided a soundproof structure including a frame having an opening, and at least one membrane-like member fixed to an opening surface where the opening of the frame is formed, in which a rear surface space is formed to be surrounded by the frame and the membrane-like member, and a sound is absorbed due to vibration of the membrane-like member, and a sound absorption coefficient of the vibration of the membrane-like member at a frequency in at least one high-order vibration mode existing at frequencies of 1 kHz or higher is higher than a sound absorption coefficient at a frequency in a fundamental vibration mode.

Abstract: An exemplary inventive subordinate oscillator array (SOA) includes two or more vibration attenuation devices (oscillators) that are sequentially arranged (e.g., via beams in the SOA) so that their respective anti-vibratory influences overlap. To design the SOA, an optimal number N of oscillators is calculated according to the equation N=?Q?, where ? is the modal overlap, Q is the quality factor, and ? is the desired fractional bandwidth. Each oscillator is akin to a conventional dynamic vibration absorber (DVA) and is characterized by its own mass, stiffness, damping, and geometry (e.g., length, width, and height). The respective characteristics of the oscillators are selected and the oscillators are distributed so that the SOA, when suitably attached to a vibrative structure, attenuates the vibrations of the structure so as to approximately flatten the structure's vibrations over a frequency band of interest.

Abstract: A shower hose silencing pad apparatus for silencing noise of a shower hose against the wall includes at least two segment bodies. Each segment body has a pair of outer edges and a sidewall extending therebetween. The sidewall has an inner face, an outer face, and a channel extending from the outer face through the inner face and between the pair of outer edges. Each segment body attaches to a shower hose. A plurality of dampeners is coupled to the outer face of each segment body. A plurality of connector straps is coupled to the segment bodies. Each connector strap is coupled between the outer edges of adjacent segment bodies of the at least two segment bodies.

Abstract: The anti-vibration device (1) includes: an inner attachment member (11); an outer cylinder (12) that surrounds the inner attachment member; and elastic bodies (31, 32) that elastically couple the inner attachment member and the outer cylinder. The elastic bodies include: a pair of end elastic bodies (31) fitted in the outer cylinder; and a pair of intermediate elastic bodies (32) separately arranged on both sides of the inner attachment member and between the end elastic bodies. Covering members (17) that form liquid chambers (14a, 14b) between the covering members and the inner attachment member is arranged between the inner attachment member and the outer cylinder. An orifice passage that provides communication between the liquid chambers is formed between the covering members and the outer cylinder. The entire intermediate elastic bodies are formed of rubber material.

Abstract: This invention provides an acoustic metamaterial unit cell, consisting of a frame, a constraint stick placed in the frame and a piece of membrane covering at least one surface of the frame. This invention also provides an acoustic metamaterial plate comprised of the provided unit cells and a composite structure of acoustic materials. Additionally, the invention provides a method to design the operating frequency bands by modifying the structure and material properties of the frame, the constraint stick and the membrane in the proposed acoustic metamaterial. The proposed structure shows a priority in fabrication, stability and service life.

Abstract: The disclosure discloses an acceleration sensor, where the acceleration sensor comprises: a housing, and a mass block in the housing and connected with the housing via at least two hanging beams, where an auxiliary buffer component is further provided between the mass block and a bottom surface of the housing, and an elastic coefficient of the auxiliary buffer component decreases as force applied thereon increases.

Abstract: A sound attenuation material includes a plurality of particles, each having a core and an elastic or compliant coating around the core, and a matrix surrounding the plurality of particles, the matrix being less dense than the core. A method of manufacturing sound attenuating materials includes adding an elastic or compliant coating to core particles and drying the coating, mixing the coated core particles into a matrix material, and pouring the mixture into a mold. The core particles are denser than the matrix material.

Abstract: A damping device to isolate electronic equipment from its surrounding environment may including a housing comprised of a lower housing and an upper housing, a base pad attached to a bottom side of the lower housing, a suspension material in connection with to a top side of the lower housing, an absorptive material in connection with the suspension material, the upper housing surrounding the absorptive material, and a top pad attached to a top side of the absorptive material. The diameter of the suspension material may be smaller than the diameter of the absorptive material, which may be smaller than the diameter of the upper housing, forming spaces to isolate the absorptive material within the housing.

Abstract: This hydraulic drive device for a work vehicle includes a main pump (1) of a variable displacement type or a fixed displacement type discharging pressure oil, a main flow passage (F1) for supplying pressure oil of the main pump to an actuator, a sub-pump (5) of a fixed displacement type discharging pressure oil, a sub-flow passage (F2) for making pressure oil of the sub-pump merge with the main flow passage and supplying the pressure oil to the actuator (2), a merging directional valve (6A) for connecting or cutting off the main flow passage and the sub-flow passage, a controller (30) for controlling operation of the merging directional valve, and a relief valve (7A) arranged in the sub-flow passage, in which the relief valve has a pressure override characteristic having a tendency that the relief pressure increases from a cracking pressure to a set pressure as a relief flow rate increases.

Abstract: A mounting arrangement secures a refrigerator compressor to a support base member through a plurality of elastomeric mounts secured on pin elements with retainers. The mounts include head portions which extend through openings provided in an elongated plate fixed to the compressor. The mounts are specifically formed with a rounded bottom to pre-load the mounting arrangement and prevent vibration transmission through cores of the mounts. In addition, each mount includes a plurality of vertically spaced rings which provide shock protection against a large impact force by deflecting and potentially contacting each other, while normal vertical isolation occurs by deflection of an uppermost one of the rings. The mounts are formed with various undercuts which allow the mounts to be optimized for the mass and operational frequency of the compressor.

Abstract: There is provided a soundproof structure which is light and thin, which has air permeability so that wind and heat can pass therethrough and accordingly no heat accumulates on the inside, and which is suitable for equipment, automobiles, and household applications. The soundproof structure has one or more soundproof cells. Each soundproof cell includes a frame having a through-hole through which sound passes, a film fixed to the frame, an opening portion configured to include one or more holes drilled in the film, and a weight disposed on the film.

Abstract: An impact tool includes a tool-accessory holding part, a body and a first hammering member. The tool-accessory holding part has a through hole extending in a hammering-axis direction and is configured to hold the tool accessory inserted into the through hole to be movable in the hammering-axis direction. The body is connected to the tool-accessory holding part in the hammering-axis direction and has an internal space communicating with the through hole. The first hammering member is linearly movable in the hammering-axis direction and configured to drive the tool accessory in the hammering-axis direction by colliding with the tool accessory. The tool-accessory holding part and the body are connected in the hammering-axis direction via a first elastic element to be movable relative to each other. A second elastic element is interposed between the first hammering member and the body in a radial direction with respect to the hammering axis.

Abstract: An acoustic abatement apparatus for an aircraft includes a layer of material disposed exterior to a fuselage of the aircraft, where the layer of material connects to the fuselage to establish a gap between the layer of material and the fuselage, a flexible container disposed in the gap, and at least one acoustic resonator connected to the flexible container. The at least one acoustic resonator is tuned to a predetermined resonator frequency.

Abstract: A soundproof structure has a plurality of soundproof cells arranged in a two-dimensional manner. Each of the plurality of soundproof cells includes a frame formed of a frame member forming an opening and a film fixed to the frame. Two or more types of soundproof cells having different first resonance frequencies are present in the plurality of soundproof cells. A shielding peak frequency at which transmission loss is maximized is present within a range equal to or higher than a lowest frequency among first resonance frequencies of the soundproof cells and equal to or lower than a highest frequency among the first resonance frequencies of the soundproof cells.

Abstract: The invention relates to a dry construction system for making partition walls (1), suspended ceilings or the like, with a support structure (2), a cladding (3) arranged on at least one side of this, and an insulation layer (4), wherein the support structure (2) comprises a plurality of carrier profiles (22), to which at least one cladding (3) is secured, and wherein the carrier profiles (22) are formed from a sheet material and exhibit in cross-section a basic section and two limb sections arranged perpendicular thereto, and comprise an embossing with regularly distributed elevations and depressions. In this situation, the centre-to-centre distance between two adjacent elevations of the embossing on one side of the sheet material is less than six times the rated sheet thickness, and the base section is connected to the adjacent limb section in each case by a curved section with an outer radius which amounts to at least three times the rated sheet thickness.

Abstract: A device is provided for damping hydrosound in liquid emitted from a sound-emitting body in the liquid. The device includes a plurality of gas-filled bodies distributed in the liquid in an area of the hydrosound-emitting body and at a distance from each other. Each of the gas-filled bodies has a natural frequency that corresponds to an emitted frequency range of the hydrosound so as to dampen the hydrosound through resonant oscillations.

Abstract: Provided is a powertrain for a vehicle in which an exhaust purifier is utilized as a dynamic damper. The powertrain includes an engine, and a transmission linked to the engine. The engine has an exhaust purification system containing a GPF device for purifying an exhaust gas. The exhaust purification system is disposed along a rear external surface of a cylinder head. The exhaust purification system is supported via a first support on the engine. A vertical side portion of the exhaust purification system is located downstream of the first support in a flow direction of an exhaust gas, extending in a direction away from the external surface.

Abstract: A conductor path structure has a damping device for an oscillation-damped and/or vibration-damped (electronic, electromechanical, micromechanical) component. The conductor path structure has a first base body made of a carrier material including a connection area for receiving the component. The connection area is arranged separated from an area of the first base body surrounding it and is arranged oscillation-damped and/or vibration damped and co-acting with an intrinsic damping device of the conductor path structure. The conductor path structure includes a second base body arranged at a distance under the first base body, wherein above the second base body of the conductor path structure at least one adhesive layer of a damping material is provided. The intrinsic damping device is formed by said at least one adhesive layer arranged between the connection area of the first base body and the area of the second base body arranged below the connection area.

Abstract: The present disclosure relates to a damping device for absorbing structural vibrations or high excitation frequencies between a first component and a second component of a turbomachine, particularly in connection with high temperature operating conditions. The first component may be a combustor or a burner of a gas turbine and the second component may be a fuel supply line, connected to or passed through a wall of the first component. The damping device may include at least one wire mesh element which is inserted into a housing with a radially outer surface of the wire mesh element being compressed by the housing, and a radially inner surface of the wire mesh element closely surrounding the second component, wherein the housing is fixedly connected to the wall of the first component by a weld seam.

Abstract: A device for deadening the sound of a component having a damping layer of a foamed material and a stiffening layer, which is fixedly connected to the damping layer and which is stiffer than the damping layer, wherein the damping layer is formed by a foamed hot-melt adhesive.

Abstract: The present disclosure provides a method, system, and fabrication facility that eliminates or substantially reduces process-limiting vibrations within a high-precision device manufacturing facility, wherein an elevated structure supports high-precision device manufacturing equipment and provides vibration reduction spacing between a floor and an upper surface of said elevated structure.

Abstract: A portable air compressor including an air tank configured to store compressed air. The portable air compressor further includes a compressor unit coupled to the air tank including compressor components for compressing air, and a housing having a base disposed generally between the compressor components and the air tank. The base has a concave recess extending at least partially around a circumference of the compressor unit. The portable air compressor further includes a power cord for supplying power to the compressor components. The power cord is receivable around the circumference of the compressor unit in the recess for storage.

Abstract: A damping device according to one embodiment includes a base member fixed to a vibration suppression target, a first coil spring, a second coil spring, and a weight member. The first coil spring includes a first fixed-side end turn portion supported on a first support portion of the base member, a first effective portion, and a first movable-side end turn portion. The second coil spring includes a second fixed-side end turn portion supported on a second support portion of the base member, a second effective portion, and a second movable-side end turn portion. Each of the first coil spring and the second coil spring is deflected in a longitudinal direction along the axis, and a transverse direction perpendicular to the axis. The weight member is arranged between the first coil spring and the second coil spring, and moves in the longitudinal direction and the transverse direction.

Abstract: The present invention relates to a multilayer film. In various embodiments the multilayer film is an interlayer film for laminated glass. The present invention also relates to an interlayer film for laminated glass, wherein the laminated glass has excellent sound insulating properties. The present invention also relates to a laminated glass that is obtained using this interlayer film. The present invention can effectively improve the compatibility of the resin film (B) with the plasticizer so that the intermediate layer (i.e., the resin film (B)) allows to add more plasticizer(s) to achieve the effect of enhancing sound-insulating. Furthermore, the intermediate layer of the multilayer film uses different plasticizer from the non-intermediate layer of the multilayer film so as to prevent the migration of plasticizers between different layers and the multilayer film has little or no plasticizer bleed-out.

Abstract: A liquid-sealed antivibration device is equipped with a shaft member and a sleeve member, an antivibration base body constituted by a rubber-like elastic body which elastically supports the sleeve member relative to the shaft member and which defines a first liquid chamber and a second liquid chamber between the shaft member and the sleeve member, and an orifice forming member made of a synthetic resin and disposed inside the sleeve member. The orifice forming member is formed with end surfaces on which a hole portion piercing along the axis of the shaft member opens, and an outer peripheral surface adhered closely to the sleeve member to form a groove portion becoming an orifice which makes the first liquid chamber communicate with the second liquid chamber, and recesses formed at corner portions defined by the end surfaces and the outer peripheral surface are connected to the hole portion.

Abstract: A panel of acoustically absorbent material with at least one side carrying a portion of looped material to engage with the hooked structures of a mounting patch placed on a mounting substrate is provided. The panel may be releasably attached to the mounting substrate via the association of the looped material with the mounting patch, such that the panel of acoustically absorbent material may be removed from the mounting substrate without damaging the structural integrity of the panel. A method of releasably attaching an acoustically absorbent material to a mounting substrate is also provided.

Abstract: An acoustic seal for a sound flanking path between an an interior architectural separation and a mullion. The seal may be configured as an elongated rail having first and seal surfaces with adhesive elements disposed on laterally offset first and second adhesive-bearing portions thereof. When installed, the elongated rail can maintain a non-deformed state when opposing faces of the mullion and the architectural separation are separated by a distance equal to the elongated rail thickness. The elongated rail can assume a deformed state when the opposing faces of the mullion and the architectural separation are separated by a distance greater than the elongated rail thickness. In the deformed state, the longitudinal edges of the elongated rail become offset from each other in a direction normal to first and second seal surfaces. The elongated rail cross-section flexes proximate to first and second flex locations that may optionally include stress relief features.

Abstract: [Problem] To provide an adhesive sheet having a surface sliding property and stainproof property. [Means for solving] An adhesive sheet is one that comprises at least a substrate and an adhesive layer, a static friction coefficient of the substrate is 0.05 or more and 1.50 or less, and an absolute value of a ?L* value of the substrate is 0.01 or more and 45.00 or less. A load at a time of 5% elongation of the substrate is preferably 1 N/cm or more and 15 N/cm or less. And a stress relaxation rate of the substrate by elongating to 10%, stopping the elongation at that state and after lapsing 600 seconds is preferably 40% or more and 100% or less.

Abstract: A same-time-domain multi-frequency band hydraulic system, comprising a high-frequency data processing system, a control system, an executive system, a load, a static measuring system, and a dynamic measuring system, wherein the high-frequency data processing system processes the input command signals, data from the dynamic measuring system, and data from the static measuring system, and automatically generates, displays, and saves same-time-domain multi-frequency band test result data, wherein part of input signals are converted into input signals of the control system by the high-frequency data processing system and executed by the executive system, wherein the frequency response and measurement accuracy of the dynamic measuring system and the front-end data processing system meet the requirements of both the test and the hydraulic testing system.

Abstract: A panel includes a structural substrate and a damping element including a viscoelastic material (VEM) layer coupleable to the structural substrate of the aircraft, and a constraining layer coupled to the VEM layer. The VEM layer is configured to dampen a vibration of the structural substrate. The constraining layer is configured to apply a shear force to the VEM layer.

Abstract: An engine device is provided with a first case which removes particulate matters in exhaust gas of an engine, and a second case which removes nitrogen oxides in the exhaust gas of the engine. The second case is connected to the first case via a urea mixing pipe. An exhaust gas inlet surface of the first case is joined to an exhaust gas outlet surface of the engine, and a support base firmly fixed to the engine is provided. The support base is partly brought into surface contact with the exhaust gas outlet surface of the engine.

Abstract: A fan for generating an air current includes a body having an air inlet, and a nozzle connected to the body. The nozzle includes an interior passage for receiving an air flow from the body and an air outlet from which the air flow is emitted from the fan. The interior passage extends about an opening or bore through which air from outside the nozzle is drawn by air emitted from the air outlet. The body includes a duct having an air inlet and an air outlet, an impeller located within the duct for drawing the air flow through the duct, and a motor for driving the impeller. An annular guide member extends about the duct for guiding air from the air inlet of the body to the air inlet of the duct. The guide member defines with the duct an annular noise suppression cavity.

Abstract: An engine mount may include: a support device; a bracket device; and a vibration proof device which connects the support device and the bracket device, and, in which the vibration proof device may include a nozzle device fastened to the support device, and has a nozzle plate dividing an internal space of the vibration proof device into a first liquid chamber and a second liquid chamber, and a flow path penetrating the nozzle plate; a first insulator defining the first liquid chamber together with the nozzle plate; a first core protruding from the first insulator toward one side, and fastened to the bracket device; a second insulator defining the second liquid chamber together with the nozzle plate; and a second core protruding from the second insulator and fastened to the bracket device.

Abstract: An acoustic protection cover for encapsulating a motor vehicle component, the cover including: a based on injection-molding material, the material comprising a thermoplastic matrix and a filler that is dispersed in such a way as to exhibit a density of between 1.3 and 1.6, the shell comprising two half-shells delimited by a thin region originating from the molding and forming a flexible hinge; a layer of elastically compressible foam overmolding the internal face of the shell, so that the cover forms an insulation system of the “mass-spring” type, the mass being formed by the shell and the spring by the layer; a means of holding the half-shells together once the hinge has been folded, so as to allow the component to be encapsulated, the matrix being made of polyvinyl butyral (PVB) and the level of filling being less than or equal to 50% by mass of the material.

Abstract: A return air bridge for use in an aircraft assembly includes an inboard portion configured to couple to a sidewall assembly at a bottom edge of the sidewall assembly and an outboard portion configured to couple to a structural member. The return air bridge also includes at least one support coupling the inboard portion to the outboard portion such that a return air flow path is defined between the inboard portion and the outboard portion. The outboard portion comprises a plate configured to direct an air flow along the return air flow path upwardly with respect to the bottom edge of the sidewall assembly.

Abstract: A housing of a centrifugal blower for use in an air conditioner is provided that includes a rotatably supported fan wheel, an inlet opening disposed in the axial direction of the fan wheel and an outlet opening disposed in the radial direction of the fan wheel. A widening diffuser is disposed downstream from the outlet opening in the flow direction, and the fan wheel is disposed in an inner volume of the housing. A crossover area formed from multiple openings is provided on at least one housing wall which delimits the inner volume. At least one chamber is disposed on the outside of the housing, the chamber completely covering the crossover area and being fluidically connected to the inner volume of the housing via the crossover area.

Abstract: A vibration damping counterbalance unit for an inceptor apparatus having a wall defining a cavity; and a plurality of vibration damping masses housed within the cavity.