Abstract: In a saddle-ride type vehicle in which an intake device is arranged at a position covered by a fuel tank from above, the intake device including: an air cleaner; a connecting tube having an upstream end thereof connected to the air cleaner; a throttle device including a throttle valve and connected to a downstream end of the connecting tube; and a resonator, a curved portion bulged upward and curved in a chevron shape is formed in the connecting tube, and the resonator arranged between the fuel tank and the connecting tube is connected to the connecting tube on the air cleaner side further than a top portion of the curved portion as seen in a side view of the vehicle.

Abstract: A cogeneration apparatus having an engine and an air-cleaning device provided to the engine is disclosed. The air-cleaning device is provided with an air filter and a hollow resonator. The air filter is provided at a position where a space within an air-cleaning case splits into an upstream space and a downstream space, and the resonator is provided to the downstream space and positioned at a predetermined interval with respect to the air-cleaning case. Air is introduced through the downstream space to an internal space of the resonator.

Abstract: Air filter and silencers comprise an air filter element having an annular body with openings at opposed ends. A top is attached over one of ends, has an outer flange sealed to the element, and includes a central section extending across the air filter element end. The top central section has a convex-shaped geometry with a radius of curvature projecting outwardly and away from the air filter element. The top central section includes a sound deadening material directed towards the air filter element. The top central section has a radius of curvature greater than the radius of an inside diameter of the air filter element. The air filter and silencer is used with an air filter assembly that includes a housing removably attached to the air filter and silencer, and that has an internal chamber projecting axially into the air filter and silencer with a sound deadening material disposed therein.

Abstract: A combined exhaust gas aftertreatment/dust ejector unit (10) is provided for use with a combustion process (14) and an air cleaner (16) of the combustion process (14). The unit (10) includes an elongate housing (30) containing an exhaust gas aftertreatment device (40) and having a radial exhaust gas outlet (34) to direct an exhaust gas flow (12) radially from the housing (30), and a dust ejector (60) including an ejector outlet (62) positioned in the exhaust gas outlet (34). The exhaust gas outlet (34) and the ejector outlet (62) have elliptical shaped cross sections (68,70), with the ejector outlet cross section (70) spaced inwardly from the exhaust gas outlet (34) to define a reduced flow area (72) for the exhaust gas flow (12) to accelerate the exhaust gas flow (12) past the ejector outlet (62).

Abstract: An air filter housing (10) for at least one compact air filter element (20) has at least one filter chamber (1) that at the ends has at least one hose connector socket (2, 3), respectively. The compact air filter element (20) is insertable chamber into the filter chamber between the hose connector sockets (2, 3) with sealing of the cross-section of the filter. At least one resonator chamber element (5, 6) is attached to the air filter housing (10) and is connected with the filter chamber (1) by at least one air-conducting channel (7, 8, 9) or slot.

Abstract: A dust collector includes turbofans with inducers fixed to the shafts of electric motors. The electric motors are fixed to the rectangular body with mounting legs. The dust collector further includes a single dust collecting filter under the turbofans. The turbofans have a diameter ranging from 40% to 50% of the length of the short side of the body.

Abstract: A filter assembly for use with compressor assemblies such as oxygen concentrators, ventilators and other breathing apparatus including a compartmented housing member having at least one inlet opening, an outlet opening, a filter member, and an adjustment member associated with the at least one outlet opening for varying the size of the at least one outlet opening for adjusting the amount of ambient air entering the filter assembly.

Abstract: An air filter system for an internal combustion engine of a vehicle can have an indicator for signaling restricted flow of air through a replaceable air filter member mounted to a filter assembly. At least one sidewall can be associated with the replaceable air filter member to be positioned with an air stream passing through the air filter member. A resettable air filter status indicator can provide a visually perceivable signal external of the filter assembly. The resettable air filter status indicator can be integrally formed in the sidewall for indicating if a mounted air filter member requires replacement in response to air intake differential pressure with respect to atmospheric pressure on a downstream side of air flow through the replaceable filter member being above a predetermined threshold value.

Abstract: Provided are an expansion-type silencer (10) including a substantially rectangular parallelepiped-shaped expansion chamber (16) surrounded by six partition walls and having a suction port (20) and an exhaust port (22) which are formed in the partition walls, and an oxygen concentrator using the expansion-type silencer (10). The expansion-type silencer (10) has a rib (24) extending from one of the partition walls of the expansion chamber (16) formed with the exhaust port (22) toward the interior of the expansion chamber (16) while being in contact with both of a pair of parallel partition walls adjacent to the one of partition walls. The rib (24) is formed with an air passage (26) for providing communication between the exhaust port (22) and the expansion chamber (16).

Abstract: A filter assembly configured for acoustic dampening for use with compressor assemblies such as oxygen concentrators including a compartmented housing member having an inlet opening, an outlet opening, a filter member, and a plurality of noise attenuating members positioned and located therewithin. The configuration of the compartmented housing member in conjunction with the positioning and location of the filter member and the noise attenuating members therewithin all contribute to absorb and dissipate any sound waves generated within the housing member due to air flow movement therethrough. This substantially reduces and minimizes noise associated with the present filter assembly.

Abstract: A silencer for a vacuum cleaner is provided and includes at least one hermetic expansion chamber mounted in an exhaust channel of the vacuum cleaner and allowing an exhaust airflow from the vacuum cleaner to pass through. The expansion chamber at its two sides has an inlet and an outlet connected to the exhaust channel. A silencing board is mounted in the expansion chamber, separating the inlet from the outlet. Pores are distributed throughout in the silencing board. The silencer integrates several different silencing structures together, and, when mounted to the exhaust port of the vacuum cleaner, can considerably diminish the noise generated by the vacuum cleaner in operation.

Abstract: A low cost combined air cleaner and resonator includes two housing members which snap together. An air filter is captured between the two members. A first of the members receives the air filter, and the second of the two members has an enlarged plenum to provide a resonator function. The combined air cleaner and resonator thus provides a low cost way of achieving both functions in a system for supplying clean air to a vehicle engine.

Abstract: A disposable assembly for filtering air drawn into an air intake and for muffling noise exiting from the air intake is provided. The assembly includes a unitary cylindrical housing having air inlet apertures at a proximal end thereof and a longitudinal filter assembly disposed therein. This filter assembly includes a hollow filter element having an air inlet side which is adjacent but spaced from the lateral enclosure of the housing and an air outlet side opposite thereto with an air impermeable silencing member disposed adjacent the air outlet side. This silencing member includes a plurality of discrete air holes therein and forms a second acoustic chamber interiorly thereof. A coupling member at the housing proximal end removably attaches the assembly to the air intake. The various chambers in the assembly as well as the silencing member and filter serve to dampen the noise.

Abstract: A low cost combined air cleaner and resonator includes two housing members which snap together. An air filter is captured between the two members. A first of the members receives the air filter, and the second of the two members has an enlarged plenum to provide a resonator function. The combined air cleaner and resonator thus provides a low cost way of achieving both functions in a system for supplying clean air to a vehicle engine.

Abstract: An air cleaner assembly 10 includes a filter located within a housing 12 between an air inlet 20 and outlet 22 for filtering airflow therebetween. The air inlet 20 extends from the housing 12 to communicate with an air intake port located at a vehicle location where fresh air is available. A resonator device 28 is mounted within the housing 12. The resonator device 12 includes a resonator volume 30 and a tuning neck 32. The resonator volume 30 fits into the housing 12 to reduce bulk and readily lend itself to adaptation to space requirements. The tuning neck 32 is mounted within the outlet 22 such that noise and vibration are communicated directly to the resonator device 28.

Abstract: An enclosure for an air aspirating machine, such as a compressor 11 for a fuel cell drive 13, which represents a closed volume, so that said volume can be used acoustically for the air that is being drawn in. An air intake 17 is extended into the enclosure 12, which is made of a sound damping and absorbing material 18, so that the resonant cavity 19 acts as a series resonator. The air is drawn in via an air inlet 21 of the compressor 11. Alternatively, the resonant cavity can also be used as a parallel resonator in that the intake path for the air is sealed within the enclosure 12 and is provided only with sound communicating openings to the resonant cavity.

Abstract: An apparatus which absorbs gas that has been discharged from a pipe at a high velocity and which releases the gas to the atmosphere at a reduced velocity and with relatively low noise. The apparatus includes a container which has a container interior, a container inlet through which the gas enters the container interior, and a container outlet, preferably located at the top of the container, through which the gas is released to the atmosphere. The container further includes a container expanded section and a container main section. The container expanded section, which acts to reduce the velocity of the gas, is located intermediate the container inlet and the container main section and has an inner surface cross-sectional area which expands from the container inlet to the container main section. The container also includes deflector vanes for diverting the flow of the gas within the container interior towards the container outlet.

Abstract: An integral filter and resonator apparatus includes filter elements positioned upstream of a Helmholtz resonator. The first embodiment includes filter elements positioned side by side within the housing. Other embodiments include a filter element with a tube which curves slightly downstream from the element. Another embodiment includes coupled chambers for attenuating the noise.