Abstract: The combination apparatus silences and filters air flow, separates air-contaminant mixtures, and maintains a regulated vacuum therein. An air filter joins an annular housing which has an outer wall and a channel defining a central axis, the channel having a primary gas inlet coupled to the air filter and a primary gas outlet and a channel wall. The apparatus has a secondary inlet port passing through the outer wall. A secondary outlet port defines an opening in the channel wall such that there is no straight line flow path between the secondary inlet and the secondary outlet. An air silencer is contained within the channel. A passageway between the secondary inlet and the secondary outlet is defined exteriorly by the outer wall and interiorly by the channel wall. A vacuum regulating means is disposed within the annular housing and is positioned next to an opening in the secondary outlet to regulate the amount of vacuum imposed within the passageway so that it does not exceed a determined maximum.

Abstract: In 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.

Abstract: The combination apparatus, preseparator, vacuum regulator and check valve silences and filters air flow and separates air-contaminant mixtures. The combination apparatus comprises an annular housing having an outer wall and a channel defining a central axis. The channel has a primary gas inlet coupled to an air filter, a primary gas outlet coupled to an engine induction system, and a channel wall therebetween. A secondary inlet port passes through the outer wall and a secondary inlet port defines an opening in the channel. A baffle is axially disposed within the housing defining a first and second flow passageway. Second baffles are disposed within the first and second passageways to effect serpentine flow through each flow passageway and filter material is disposed within each flow passageway. A preseparator is coupled between the secondary inlet and an engine breather and has an annular housing with preseperator baffles disposed therein for effecting serpentine flow therethrough.

Abstract: A noise attenuating air cleaner assembly for an internal combustion engines or the like operating in a dusty environment. The air cleaner assembly having a silencer assembly arranged concentric inside an air filter cartridge assembly and a noise attenuating end wall assembly closing an end of the air filter cartridge assembly attenuating air cleaner assembly to provide a source of clean air to the engine and to reduce transmitted induction noise.

Abstract: The combination apparatus silences and filters air flow and separates air-contaminant mixtures. An air filter joins an annular housing which has an outer wall and a channel defining a central axis, the channel having a primary gas inlet coupled to the air filter and a primary gas outlet and a channel wall. The apparatus has a secondary inlet port passing through the outer wall. A secondary outlet port defines an opening in the channel wall such that there is no straight line flow path between the secondary inlet and the secondary outlet. An air silencer is contained within the channel. A passageway between the secondary inlet and the secondary outlet is defined exteriorly by the outer wall and interiorly by the channel wall.

Abstract: Methods and apparatuses for cleaning and/or muffling a gas discharge which in one aspect includes a hollow body with a filter element mounted therein through which the discharge gas flows and in which liquids entrained in the gas are filtered out, the body having one or more liquid collection areas from which liquid can be removed from the apparatus for disposal or for re-use. The apparatus also can serve as a noise muffler to reduce the noise level of the gas discharge.

Abstract: There is disclosed a silencer for a pneumatic system, including a sound muffler containing a primary filter and removable cartridge containing an oil mist reclassifying filter.

Abstract: A breathing air garment for isolating a wearer from hostile environments containing toxins or irritants includes a suit and a separate head protective enclosure or hood engaging a suit collar in sealing attachment. The hood and suit collar are cylindrically shaped and dimensioned to enable the wearer to withdraw his hands from the suit sleeves to perform manual tasks within the hood interior. Breathing air is supplied from an external air line with an air delivery hose attached to the hood interior. The hose feeds air into an annular halo-like fiber-filled plenum having spaced discharge orifices attached to the hood top wall. A plurality of air exhaust/check valves located at the suit extremities cooperate with the hood air delivery system to provide a cooling flow of circulating air from the hood throughout the suit interior. A suit entry seal provided on the suit rear torso panel permits access into the suit and is sealed with an adhesive sealing flap.

Abstract: A supplied air respirator having a detachable air flow baffle therein, the baffle having increased air flow efficiency with a low noise operating level. The baffle is formed from a flexible plastic tubing having openings spaced laterally and circumferentially therein and having a foam layer sealingly secured there around and preferably having a cover thereover. The baffle can be formed in a partial or substantially complete loop within the respirator and is detachably secured therein with clips or loops.

Abstract: A combination acoustical muffler and exhaust converter for use with internal combustion engines, comprising an elongated hollow cylinder adapted to be connected to a source of exhaust gas, screen means positioned at a plurality of longitudinally spaced locations within said cylinder for partitioning the cylinder into a plurality of chambers arranged in series flow relation with each other and with respect to the flow of exhaust gas through said cylinder, the screens having a silencing action on said exhaust gas, magnet means in one of said chambers for exerting a magnetic pressure on the gas passing therethrough to serve to separate ferrous particles from the exhaust gas stream, a packing material of mineral material, such as mineral wool, in another of said chambers for condensing moisture in said exhaust gas and for removing hydrocarbon therefrom, and a material such as a ceramic material of an extremely fine porous nature, in still another of said chambers for removing carbon monoxide from said exhaust gas

Abstract: A combined sound damper and oil trap for compressed air apparatus comprising an oil trap having a hose or tube (5) which is directly connected to the compressed air apparatus and which at the outer end thereof encloses a scraper sleeve (7), whereby a radial space is formed between the scraper sleeve (7) and the hose or tube. The hose or tube is connected to an oil collector housing (1) whereas the scraper sleeve (7) is connected to a pressure chamber (2) which in turn directly communicates with a filter housing (3) containing a sound damper. The said sound damper comprises both a diffusor plate (11) provided between the pressure chamber and the filter housing (3) and a filter (12) which is mounted at the outlet end of the filter housing. The diffusor plate (11) provides a damping of low frequency noise and a substantially even distribution of the outlet air over the entire diffusor plate, and the filter (12) provides both a separation of oil mist from the outlet air and a damping of high frequency noise.

Abstract: An air intake pipe, for mounting to the air filter of an internal combustion engine has two air flow channels having different lengths. A duct is provided between the air flow channels connecting them over their entire length. The duct is dimensioned to provide both sound attenuation and acoustic wave interference between intake noises in the two channels. Thus, the intake pipe acts as an intake noise silencer.

Abstract: A pulsation and noise suppressor assembly with an air filter intended for induction system in thermodynamic engines. A tubular housing with at least one bracket connecting a filter and its shield to a suppression cartridge unit. Inside the housing is a replaceable cartridge for suppressing pulsations and noise, the latter consisting of minimum one tube with optionally shaped holes made in the tube walls and arranged in rows along the tube generating lines with angular displacement each to another. The holes connecting a tube interior to the outer space. The cartridge tubes are eccentric to each other forming at least two chambers for suppressing noise and pulsation. Each tube wall thickness is proportional to the tube diameter, and each chamber volume is larger than that of the adjacent chamber from its internal side, the cross-section area of the holes being advantageously proportional to the tube diameter.

Abstract: This invention relates to improvements in an air-cleaner for internal combustion engines, more particularly, to an improved air-cleaner having such sound-silencing construction that an air-cleaner element is removably fixed in a vibration-isolating cover which is provided in the housing of the air-cleaner.

Abstract: A smog control device for use particularly on automobiles and comprising an enclosure connectable to the automotive exhaust system and having a passageway therein defined principally by baffles, and a pair of different sized vaned rotors coaxially mounted on a single shaft are disposed in the passageway such that the first smaller rotor is upstream from the second, larger rotor, whereby the first rotor is driven by the automotive exhaust flow and the second rotor is driven by the first rotor to create a partial vacuum in the passageway between the rotors, the partial vacuum being instrumental in causing the precipitation and caking of exhaust pollutants on downstream baffles which are removable for cleaning. A small motor could also be used to drive the rotors.

Abstract: Internal combustion engine exhaust gas muffler and purifier with segmented hollow shell and removable middle segment, said shell having an upstream exhaust gas expansion chamber, a downstream sound-absorbing and sound-collecting chamber, and a middle, removable cartridge receiving housing, the cartridge being filled with small particles of exhaust gas purifying material.

Abstract: A particle separator for separating and removing foreign particles from engine inlet air incorporates a plurality of identical channel assemblies. The channel assemblies are arranged in side-by-side fashion in a defined panel area. Separation is achieved by accelerating the particles to a high velocity and bending the airstream such that the particle inertia carries the particles into a capture area. A small percentage of the incoming air is used to induce particulate matter to proceed into the capture area. By use of a turbulence generator particulates are kept in suspension in the capture area to enable easy exhaustion overboard.

Abstract: A vacuum sweeper, particularly for collecting borings, has an upright cylindrical receptacle with a tangential inlet for admission of an air stream which carries borings and/or other solids and an open top which is overlapped by a platelike air filter disposed below a cover which is separably connected with the receptacle and has downwardly extending projections to prevent upward flexing of the filter. A side channel vacuum pump is installed in the cover and has an inlet which draws air from the receptacle via filter and a passage of the cover, and an outlet which communicates with a sound deadening annular channel provided in the cover and concentrically surrounding the rotor of the pump. The open end of the channel extends upwardly and contains a spherical float which rises therein to a level indicating the rate of air flow from the channel.