Abstract: A fire suppression nozzle assembly includes a nozzle having a first tube defining an axially extending passageway. The passageway includes a plurality of primary outlets disposed on a sidewall of the first tube. The nozzle also includes a second tube circumscribing the first tube to define a chamber. The primary outlets provide fluid communication between the passageway and the chamber. A sidewall of the second tube has a first set of radially facing secondary outlets axially offset from the primary outlets in a first direction and a second set of radially facing secondary outlets axially offset from the primary outlets in a second direction opposite the first direction. The nozzles disclosed herein are configured such that gas exiting a plurality of outlet holes is balanced.

Abstract: A fire suppression system includes an inert gas source to supply inert gas to an enclosure via distribution piping. The system includes a fire suppression nozzle that is installed in the enclosure. The nozzle includes an inlet that connects to the distribution piping and includes a plurality of outlet holes. During discharge of the inert gas, the sound power level from, the nozzle is no greater than 125 dB for a frequency range from 500 to 10,000 Hz for a coverage area up to 32 ft.×32 ft. in compliance with UL 2127. The nozzles disclosed herein are configured such that gas exiting a plurality of outlet holes is balanced.

Abstract: One aspect of the present disclosure provides an exhaust unit including a housing, a wall member, a catalyst, and a muffler chamber. The housing includes a feed inlet and a discharge outlet. The housing is configured such that an exhaust gas of an internal combustion engine is introduced from the feed inlet, and the exhaust gas is discharged from the discharge outlet. The wall member is disposed in the housing, and forms a cylindrical flow path that guides a flow of the exhaust gas introduced from the feed inlet to curve along an outer circumference of an interior of the housing. The catalyst is disposed in the flow path. The muffler chamber communicates with the flow path in a downstream side of the catalyst in the flow path. The wall member serves as a part of a wall that defines an inside and an outside of the muffler chamber.

Abstract: A silencer is equipped with a hollow tubular portion in which a discharge flow passage is formed that communicates on one end side thereof with a discharge port of a fluid pressure device (ejector) through which a pressure fluid is discharged, a cap member attached to another end part of the tubular portion, a sound absorbing member attached to an inner wall surface of the tubular portion, and a plurality of discharge ports adapted to discharge the pressure fluid, which has passed through the discharge flow passage in an axial direction of the tubular portion, in radial directions perpendicular to the axial direction.

Abstract: A silencer for a clutch air booster may include an exhaust retainer including a disk-shaped bottom portion seated on the upper side of an outlet body of the clutch air booster and a retainer hole formed in the center of the bottom portion, a valve seated on the exhaust retainer to cover the retainer hole, a valve housing coupled to an outer side of the exhaust retainer and forming an inner space configured to accommodate the valve, and a rubber cap coupled to an outer side of the valve housing to cover an upper side of the valve housing.

Abstract: An oil separator includes a casing that has an inlet for air and an outlet for air, and an impingement member that is provided inside the casing. Air that contains oil is introduced through the inlet into the casing and caused to strike the impingement member so that the oil is separated from the introduced air and is recovered. The outlet opens in the horizontal direction of the casing. The oil separator further includes an L-shaped elbow member that is attached to the outlet. The elbow member protrudes in the horizontal direction from the outlet and is bent upward.

Abstract: An oil separator includes a casing that has an inlet for air and an outlet for air, and an impingement member that is provided inside the casing. Air that contains oil is introduced through the inlet into the casing and caused to strike the impingement member so that the oil is separated from the introduced air and is recovered. The outlet opens in the horizontal direction of the casing. The oil separator further includes an L-shaped elbow member that is attached to the outlet. The elbow member protrudes in the horizontal direction from the outlet and is bent upward.

Abstract: A fire suppression nozzle assembly includes a nozzle having a first tube defining an axially extending passageway. The passageway includes a plurality of primary outlets disposed on a sidewall of the first tube. The nozzle also includes a second tube circumscribing the first tube to define a chamber. The primary outlets provide fluid communication between the passageway and the chamber. A sidewall of the second tube has a first set of radially facing secondary outlets axially offset from the primary outlets in a first direction and a second set of radially facing secondary outlets axially offset from the primary outlets in a second direction opposite the first direction. The nozzles disclosed herein are configured such that gas exiting a plurality of outlet holes is balanced.

Abstract: The invention relates to a vehicle silencer (1). The vehicle silencer (1) comprises a first housing part (2) having a first outer casing (10) and a second housing part (3) having a second outer casing (21). The vehicle silencer (1) also comprises a resonator inner element (31) that is interlockingly accommodated in at least one of the housing parts (2, 3), and at least one chamber dividing wall (17), as well as at least one first inner pipe section (15) connecting to an inner perimeter (51) of the chamber dividing wall (17), wherein at least one first (6) and a second resonator chamber (7) are formed by the two housing parts (2, 3) and the resonator inner element (31).

Abstract: A silencer reduces the noise from a venting high or low pressure gas outlet port. The exhaust holes are on the side of the cylindrical body. A lower nut is loosened to point the exhaust holes downwind for safety concerns. A disposable soft module embodiment and an all metal non-disposable embodiment is disclosed.

Abstract: Example noise attenuators for use with process control devices are described herein. An example apparatus includes a first plate and a second plate disposed in a fluid passageway of a noise attenuator. The second plate is spaced apart from the first plate. The example apparatus also includes a first support rod extending along a central axis of the fluid passageway. The first support rod is coupled to the first plate and to the second plate. The example apparatus further includes a second support rod extending along an axis parallel to and offset from the central axis. The second support rod is coupled to the first plate and the second plate.

Abstract: A device (100) for placing a seal (J) on a mounting (S) including a vibration generator (10), that includes: a main body (11); a distal portion (12), movable relative to the main body, onto which a cap (13) having a contact surface (13a) for engaging with the seal is attached; and drive elements (14), configured to drive the distal portion in reciprocal translation relative to the main body, such as to place the seal on the mounting when the contact surface (13a) of the cap (13) engages with the seal (J) that is placed on the mounting (S). The device includes: a grasping handle (20), connected to the main body; and resilient connection elements (30a, 30b) that are located between the main body and the grasping handle and are configured such as to limit the propagation, in the grasping handle, of the vibrations generated by the reciprocal translation movement.

Abstract: The invention relates to a method for manufacturing a fuel tank on the basis of thermoplastic material, the method comprising the following method steps: producing semifinished products in sheet form from a fiber composite material with a matrix of thermoplastic material, laminating the semifinished products with a laminate that comprises at least one barrier layer for hydrocarbons, heat-treating the laminated semifinished products until the thermoplastic material plasticizes, thermoforming the plasticized semifinished products in a thermoforming mold to form shells and joining the shells to form an essentially closed tank.

Abstract: A sleeve is disclosed for use with a hammer. The sleeve may have a generally cylindrical body with a first end and a second end. The sleeve may also have a plurality of channels spiraling at least partially around the generally cylindrical body between the first and second ends.

Abstract: A reversible pneumatic vane motor includes a stator housing with a pressure air inlet passage and an exhaust air outlet passage, a cylinder supported in the stator housing, a vane carrying rotor rotatable in the cylinder and forming a clearance seal portion with the cylinder, air communication ports located at opposite sides of the seal portion for supplying motive pressure air or scavenging exhaust air from the cylinder, a primary outlet diametrically opposite the clearance seal portion, and a directional valve for connecting alternatively the air communication ports to the pressure air inlet passage and the exhaust air outlet passage. The motor also includes auxiliary outlet ports which are located between the primary outlet and each one of the air communication ports, and the directional valve includes control parts for opening up and closing, respectively, communication between the auxiliary outlet ports and the atmosphere via the exhaust air outlet passage.

Abstract: A powered hammer includes a housing having a proximal end and a distal end. The distal end includes an opening for a tool to pass through. The powered hammer further includes a shroud member coupled to the housing and configured to surround an outer surface of the distal end of the housing. The shroud member includes an opening on a lower surface thereof. The opening is configured to allow the tool to pass through. The shroud member is made from a ceramic material with a layer of fiber glass disposed adjacent to the outer surface of the distal end of the housing. The shroud member is configured to reduce heat transfer to the housing from an ambient environment proximate the distal end of the housing.

Abstract: A muffler integrated type gasoline particulate filter includes a filter having first and second surfaces and first channels and second channels alternately arranged, each of the first channels being closed at the second surface and each of the second channels being closed at the first surface, the filter collecting exhaust gas particulates when exhaust gas passes through a wall surface disposed between the first and second channels. The muffler integrated type gasoline particulate filter further includes protruding walls formed on an inner wall surface of each of the first and second channels in a longitudinal direction thereof. The protruding walls reduce noise of the exhaust gas flowing along each of the first and second channels.

Abstract: Illustrative embodiments of diaphragm pumps including a muffler-mounted sensor are disclosed. In one illustrative embodiment, a diaphragm pump includes a shaft coupled to at least one diaphragm, an exhaust chamber configured to receive a motive fluid that has driven reciprocation of the at least one diaphragm and the shaft, a muffler disposed at least partially within the exhaust chamber, the muffler having a sensor mounting chamber defined therein, and a proximity sensor disposed in the sensor mounting chamber, a sensing end of the proximity sensor being flush with an end of the sensor mounting chamber nearest the shaft.

Abstract: Hand-held power tools with an external composite sleeve having a forward portion and a rearward portion and defining an axially extending cavity. The power tools also include an internal metal housing having a substantially cylindrical body with a plurality of circumferentially spaced apart, longitudinally-extending front posts that project radially outward from the cylindrical body. The metal housing resides in the composite sleeve. The front posts can be closely spaced to or abut an inner surface of the forward end (e.g., front cap) of the sleeve. In a front exhaust configuration, the front posts and sleeve cooperate to define a plurality of circumferentially spaced apart gap spaces, a respective gap space bounded by adjacent posts, an outer surface of the cylindrical body and the inner surface of the sleeve.

Abstract: A sound suppressor device for an air drying unit of a compressed-air supply system having a sound suppressor housing on which is arranged an inlet opening for the supply of condensate-laden compressed air to be discharged from the air drying unit and at least one outlet opening for the discharge of the condensate-laden compressed air to the outside, wherein the inlet opening issues into at least one pre-chamber of the sound suppressor housing, which pre-chamber issues into post-chambers which are connected in parallel and which are arranged around a heating rod arranged centrally in the sound suppressor housing.

Abstract: A portable pneumatic power wrench has a housing with a handle, a motor, a pressure air inlet passage, and an outlet passage for ducting exhaust air from the motor out of the housing. An outlet unit is connected to the outlet passage and has a first outlet opening section forming a main exhaust air flow path, a second outlet opening section forming an additional exhaust air flow path, and a manually operable valve arranged to control the additional exhaust air flow path by opening or closing the second outlet opening section. The total outlet flow area of the main exhaust air flow path and the additional exhaust air flow path gives an augmented torque output of the power wrench.

Abstract: The blowdown silencing system includes an initial restrictor in communication with a blast pot vessel for controlling the flow of pressurized air from the vessel into a first expansion chamber. The outlet of the first expansion chamber is in communication with a reducer. The reducer outlet is in communication with a shut-off valve, which may be manually controlled or automatic. The shut-off valve may be upstream or downstream of the reducer. The outlet of the reducer/shut-off valve is introduced into a muffler system which includes an exhaust path and a deflector for absorbing and/or deflecting abrasive particles which may be evacuated from the blast pot vessel during blowdown.

Abstract: A pneumatic nailing machine includes a striking cylinder accommodated in a main housing to permit a piston and driver assembly to be moved for driving a nail when compressed air is supplied into the cylinder. A valve member is movable relative to the cylinder between an air-supplying position and an air-exhausting position. A winding air channel has an intake port disposed downstream of a head valve zone, an outflow port angularly displaced from the intake port, and a channel body which extends radially from the intake port, axially into a mounting shell mounted on the main housing, and circumferentially toward the outflow port. Compressed air exhausted from the cylinder can expand in the air channel and the flow rate of the compressed air is reduced so as to efficiently attenuate noise.

Abstract: A method and system for reducing or eliminating banding in a rendering device caused by pressure pulsations from a blower. The pressure pulsation frequency resulting from a plurality of pressure pulsations propagated from a blower can be reduced by forming an obstruction device at an outlet of the blower. Total airflow and total pressure propagated by the blower are maintained by modifying or removing an existing restrictor plate thereby reducing acoustic noise associated with the pressure pulsations in a xerographic cavity.

Abstract: A method of controlling a discharge of an exhaust gas from a pneumatic device includes directing the exhaust gas from an exhaust port of the pneumatic device into proximity with a heated portion of the pneumatic device, expanding the exhaust gas in proximity with the heated portion of the pneumatic device to heat the exhaust gas, and discharging the exhaust gas to atmosphere.

Abstract: A sound damper for compressed air systems of vehicles includes a housing, an insulator and at least one web. The housing has an air inlet and an air outlet. The insulator is located in the housing, and the web is located in the housing such that it protrudes at least partially into the insulator. Air that flows through the housing from the air inlet to the air outlet is conducted by the web into the insulator.

Abstract: A silencer is described for damping the outflow noise of compressed air from compressed air appliances, in particular compressed air appliances of vehicles, with an inlet port, with at least one outlet port and with a pot-like housing which is arranged between these ports and which has a pot casing and a pot bottom, a sound-absorbing material in the form of a cartridge of a filter knit, serving for noise damping, being arranged in the inner space of the pot-like housing, characterized in that a layer of fibrous material is arranged between the cartridge and the pot casing.

Abstract: The invention relates to a sound dampening housing for a rock drill which moves along a feed beam in a longitudinal direction thereof, the sound dampening housing being attachable to the feed beam of the rock drill on its both sides so that together with the feed beam the sound dampening housing constitutes a substantially closed space. The sound dampening housing is double-shelled, and an airspace is provided between its inner shell and its outer shell.

Abstract: A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favorably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber.

Abstract: An absorptive muffler assembly includes a first body and a second body surrounding the first body. A resilient mount having at least one resilient portion and at least one support arm supports the first body and isolates the second body from vibrations of the first body.

Abstract: A muffler for mounting to a handheld pneumatic tool, such as a die grinder. The muffler comprises a hollow open-ended casing having an inner wall lined with a thick layer of an insulating material. The muffler is sleeve mounted about a coupler positioned between an exhaust end of the pneumatic tool and an air adapter supplying compressed air to the pneumatic tool for operation thereof. A plate comprising a plurality of perforations is positioned at a first face of the casing adjacent the air adapter. A biasing member is further placed between the plate and the air adapter for biasing a second face of the casing against the exhaust end. In this manner, during operation of the pneumatic tool, released air expelled at the exhaust end is directed through the casing to reduce a level of the noise at the exhaust end.

Abstract: A noise damper for a compressed air device includes a tubular housing part provided with an air inlet and an inserted insulating material, in particular, an inserted knitted fabric roll. The air inlet is embodied in the envelope of the tubular housing part such that the supplied air tangentially flows through the insulating material or the knitted fabric roll, is radially deviated inside the tubular housing part, and axially flows out from at least one end of the tubular housing part.

Abstract: An exhaust-gas muffler (1) has a housing (2) through which at least one sleeve (11) projects. At one end, the sleeve (11) has an attachment opening (10) and at the opposite-lying end has an access opening (14). To avoid a contamination of the sleeve (11) during operation, a plug (15, 25, 35, 40, 45, 55) of a pressed metal wire is arranged in the access opening (14).

Abstract: A method of controlling a discharge of an exhaust gas from a pneumatic device includes directing the exhaust gas from an exhaust port of the pneumatic device into proximity with a heated portion of the pneumatic device, expanding the exhaust gas in proximity with the heated portion of the pneumatic device to heat the exhaust gas, and discharging the exhaust gas to atmosphere.

Abstract: A noise suppressor for an apparatus having a cooling fan and cooling duct includes a muffler including a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting the intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate, and a distance d between the reflection plate and the intake plane is set such that d<c/(2×f) where f is the sound-absorption frequency of the muffler and c is the speed of sound.

Abstract: Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing.

Abstract: A muffler for mounting to a handheld pneumatic tool, such as a die grinder. The muffler comprises a hollow open-ended casing having an inner wall lined with a thick layer of an insulating material. The muffler is sleeve mounted about a coupler positioned between an exhaust end of the pneumatic tool and an air adapter supplying compressed air to the pneumatic tool for operation thereof. A plate comprising a plurality of perforations is positioned at a first face of the casing adjacent the air adapter. A biasing member is further placed between the plate and the air adapter for biasing a second face of the casing against the exhaust end. In this manner, during operation of the pneumatic tool, released air expelled at the exhaust end is directed through the casing to reduce a level of the noise at the exhaust end.

Abstract: A muffler for an engine in oilfield applications has a tube with nozzles in its inlet section for spraying a mist of water from the well into the exhaust gases produced by the engine, so that a significant portion of the water is converted to water vapor and exits with the exhaust gases at the outlet of the tube. Vortex generators on the interior surface of the midsection of the tube create turbulence in the exhaust gases and water mist. A sump at the outlet section of the tube collects the remaining water and pollutants trapped by the water for subsequent disposal.

Abstract: A resilient mount useful in a muffler assembly includes a support arm, a bracket arm and at least one resilient portion. In one example, the resilient portion comprises neoprene to provide a cushion between the support arm and the bracket arm. The resilient mount is for supporting at least one absorptive body within a housing and isolating the housing from vibrations of the absorptive body.

Abstract: A silencer includes a cylindrical member held between a body connected to an exhaust side of a fluid pressure device and a disk-shaped retaining member. A net-shaped sound absorber is disposed around an outer circumference of the cylindrical member. A pressure fluid flows from the body into the interior of the cylindrical member and is discharged toward the sound absorber through a plurality of first through fifth exhaust holes formed in the cylindrical member. Accordingly, dust in the pressure fluid is removed by the sound absorber, which is formed of a plurality of stacked filters, and further, the pressure fluid is discharged to the outside after exhaust noises have been absorbed by the sound absorber.

Abstract: Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing.

Abstract: A noise reducing device includes a housing defining an expansion chamber therein and having a longitudinal axis along the length of the expansion chamber and a tool port in fluid communication with the expansion chamber, the tool port being oriented transversely relative to the longitudinal axis so as to cause fluid directed from the tool port to the expansion chamber to whirl about the expansion chamber.

Abstract: The present invention provides a silencer, which is coupled to a pneumatic device to reduce noise. The silencer (10) of the present invention has a double pipe structure, which includes an inner casing (11), which is coupled to an outlet of the pneumatic device, and an outer casing (12), which is coaxially provided around the inner casing (11). A space (18) is defined between the inner casing and the outer casing. The space communicates with an air guide hole (15), which is formed in one end of the inner casing. Furthermore, an acoustical absorbent (22) is provided in the space (18). Preferably, the acoustical absorbent has a spiral shape. Thus, compressed air, which has passed through the pneumatic device, passes through the acoustical absorbent of the silencer. At this time, almost all noise is absorbed by the acoustical absorbent.

Abstract: Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing.

Abstract: An exhaust system comprising: an exhaust chamber having a longitudinal axis and an outer wall defining alternating longitudinally-extending ribs and grooves; and an insert within the exhaust chamber, the insert including a plurality of fins extending generally perpendicular to the longitudinal axis, each fin including a distal edge extending substantially close to the plurality of ribs, the insert defining expansion chambers between adjacent fins. Pressurized gas flowing through the exhaust chamber flows along the grooves and expands within the expansion chambers to reduce the pressure of the pressurized gas prior to the gas exiting the exhaust chamber. The fins may in some embodiments be sufficiently stiff to resist substantial deflection under the influence of the gas.

Abstract: A noise reducing device includes a housing defining an expansion chamber therein and having a longitudinal axis along the length of the expansion chamber and a tool port in fluid communication with the expansion chamber, the tool port being oriented transversely relative to the longitudinal axis so as to cause fluid directed from the tool port to the expansion chamber to whirl about the expansion chamber.

Abstract: A pulsation dampener for receiving a fluid medium containing pressure pulsations. The pulsation dampener can include a body having an inner surface, an inlet, and an outlet, and a fluid path defined at least partially by the inner surface of the body. The fluid path can include a first chamber in fluid communication with the inlet and having a first cross-sectional area, a second chamber positioned adjacent the first chamber and having a second cross-sectional area different from the first cross-sectional area, and a third chamber in fluid communication with the outlet and positioned adjacent the second chamber opposite the first chamber and having a third cross-sectional area different from the second cross-sectional area. The fluid path can be configured such that the second cross-sectional area is greater than the first cross-sectional area and the third cross-sectional area.

Abstract: Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing.

Abstract: A surface cleaning apparatus is disclosed. The surface cleaning apparatus comprises a fluid flow path extending from a dirty fluid inlet to a clean air outlet and including a suction motor. At least one cleaning stage is positioned in the fluid flow path. The suction motor is positioned in a housing of the surface cleaning apparatus and upstream of the clean air outlet. A sound dampening passage is provided downstream from the suction motor and in fluid flow communication with the clean air outlet. At least a portion of the sound dampening passage comprises a first layer of a sound reflecting material and an inner layer of sound absorbing material. Such a passage is useable in other household apparatus that have an air exit.

Abstract: A muffler suited for use in discharging exhaust gas from an engine. The muffler generally includes a housing that defines a muffler interior, an inlet aperture, and an outlet aperture. A baffle that defines a baffle interior is positioned to divide the muffler interior into an inlet space and an intermediate space. A first aperture is defined within the baffle to provide fluid communication between the inlet space and the intermediate space and a second aperture is formed within the baffle to provide for fluid communication between the intermediate space and the baffle interior. A flow guide is integrally formed with the baffle and is positioned to direct exhaust gas from the baffle interior through the outlet aperture.