1356 results about "Expansion chamber" patented technology

A sound suppressor for a firearm comprises a cylindrical housing having a rear end cap attached to the housing and having means for mounting to the muzzle of a firearm, a front end cap attached to the housing and having a centrally positioned aperture, and at least one baffle element positioned within the housing between the rear end cap and front end cap. The baffle element comprises a flat plate with an integral rearward-protruding cone with the cone having an entrance aperture and an exit aperture, with the cone having an elongated aperture that extends from the entrance aperture toward the flat plate. An initial coaxial spacer element is positioned between the rear end cap and the baffle element, with the initial coaxial spacer element having at least one gas port and at least one notch at an edge of the initial coaxial spacer element. Inner and outer expansion chambers are formed between the rear end cap, the initial coaxial spacer element and the baffle element. A coaxial spacer element is positioned between the front end cap and the baffle element, and the coaxial spacer element has at least one gas port and at least one notch at an edge of the coaxial spacer element. Inner and outer expansion chambers are formed between the baffle element, the coaxial spacer element and the front end cap.

An apparatus and method for providing an etching gas source for etching one or more microstructures located within a process chamber. the apparatus has a gas source supply line attached to a gas source and one or more chambers for containing an etching material. In use, the etching material is transformed into an etching material vapor within one or more of the chamber and the gas supply line provides a supply of carrier gas to the etching material vapor and also supplies the etching material vapor transported by the carrier gas to the process chamber. Advantageously, the apparatus of the invention does not require the incorporation of any expansion chambers or other complicated mechanical features in order to achieve a continuous flow of etching gas.

The silicon etching apparatus using XeF2 includes: a basic structure composed of a loading chamber tot loading XeF2, an expansion chamber for collecting sublimated XeF2 gas, and an etching chamber for performing an etching process; and a means for injecting nitrogen prior to the etching process to eliminate air moisture in the apparatus and thus preventing the formation of HF. The silicon etching apparatus using XeF2 further includes: an injector having a predefined shape provided in the etching chamber for uniformly injecting the XeF2 gas downward on to surface of a wafer; a feedback controller for feedback controlling the internal pressure of the loading chamber in order to prevent sublimation of the residual XeF2 in the loading chamber; and a weight scale for measuring the weight of XeF2 in the loading chamber.

In an infusion apparatus, an infusion line (4) connects a container (2) of an infusion fluid to an extracorporeal blood circuit (23). A first valve (6) closes the infusion line downstream of an infusion pump (5). An expansion chamber (9), provided with a pressure sensor (10), is arranged between the infusion pump and the first valve. A second valve (8) closes a vent line (7) of the expansion chamber. The processor closes the first valve when the container is emptied. After replacement with a new and full container, the processor restarts the pump and selectively opens the first valve or the second valve according to the increase in pressure measured in the expansion chamber.

A pneumatically driven setting tool for driving in fastening elements, includes a chamber (17) forming a storage chamber (22) for storing the pressure medium produced by the compression device (30, 130) and an expansion chamber (26) adjoining the drive-in piston (13), which is displaceable in a guide (12), at a side of the drive-in piston (13) remote from the piston stem (14), communicating with the storage chamber (22), and having an opening (18) connecting the expansion chamber (26) with the drive-in piston (13), at least one check valve (44, 54, 142) arranged between the compression device (30, 130) and the chamber (17), and a piston retaining device (47) for retaining the drive-in piston (13) in its initial position (80) in which the chamber (17) is sealed against the guide (12).

A portable ventilator for providing an air-recipient with compulsory respiration is provided with an outlet manifold and a single-expansion-chamber muffler configured so that airflow through an inhale outlet port of the muffler is pulse-free and a transmission loss, defined as the ratio of sound power generated by the at least one compressor and incident on the muffler to the sound power transmitted by the muffler, is sufficient to deaden the sound power of the compressor.

A machine for the manufacture of inflated plastic dunnage and other fluid filled units is disclosed. In a disclosed and pictured dunnage embodiment, the machine includes a hollow shaft rotatably mounted on a frame. In the preferred embodiment the shaft is solid. With either embodiment a drive is operably connected to the shaft for causing the shaft to rotate about its axis and a drum mounted on the shaft to rotate with the shaft. The drum is in the form of a pair of closely spaced discs having perimetral, cylindrically contoured sealing surfaces for support and, in cooperation with driven metal belts, transport of a web being formed into dunnage units. Sets of heating and cooling shoes having spaced arcuate surfaces are complementally positioned adjacent the drum surfaces with the cooling shoes downstream from the heating shoes in the direction of dunnage formation rotation. A nozzle is mounted generally tangentially of the drum at a location midway between the discs. Each of the cooling shoes includes an air expansion chamber communicating through a shoe inlet when in use with a supply of air under pressure. In the hollow shaft embodiment one cooling shoe chamber has an outlet in communication with the nozzle via the shaft.

A suppressor for a firearm includes a first gas expansion section of relatively large size sufficient to reduce the temperature and pressure of the gas expelled from a muzzle during discharge of the firearm to a level that avoids rapid degrading of structural members such as baffles in the suppressor that are downstream of the muzzle. The gas is channeled through multiple paths to distribute its energy more equally. Preferably, the suppressor is formed with a lightweight, thermally-conductive composite portion. The composite portion provides lightweight, bursting strength with good thermal conductivity and little contribution to vibrational instability of the muzzle to which it is attached. The composite portion may be of a carbon fiber, silicon, boron, or metallic base. In one embodiment, a first expansion chamber is in communication with the muzzle and with a second expansion chamber and in another embodiment, the first expansion chamber communicates with the muzzle and with the second expansion chamber The composite portions of the suppressor provide good bursting strength and heat conductivity with light weight. In some embodiments, a series of baffles creates turbulence in the gas, slowing its motion and distributing the energy more evenly over space.

The present invention is of device, system, and method for cooling and heating an operating tip of a cryoprobe using a single source of compressed gas. Cooling of the operating tip is effected by Joule-Thomson expansion of a high-pressure cooling gas through a Joule-Thomson orifice into an expansion chamber. Heating of the operating tip is effected by electrical resistance heating. In preferred embodiments, heating of the operating tip is effected by electrical resistance heating of low-pressure gas flowing towards the operating tip. Preferably, gas from a single gas source is supplied to the probe during both cooling and heating phases, a cooling gas being supplied at high pressure when used for cooling and at low pressure when used for heating. Low-pressure gas supplied during the heating phase is heated as it flows towards the operating tip, preferably by electrical resistance heating within the body of the probe. A single gas input lumen is used during both cooling and heating phases to transport gas into the probe, and a single gas exhaust lumen is used during both cooling and heating phases to conduct gas out of the probe.

An engine uses a top dead center piston stop device. It is fed by compressed air, via a working capacity, which, in the bi-energy version, includes a device for heating the air supplied by additional energy. The active expansion chamber consists of a variable volume or charge piston sliding in a cylinder, coupled to a space above the engine piston via a passage. When stoped at upper dead center, the pressurized air is admitted into the expansion chamber with the smallest volume thereof and, under the effect of thrust, increases the volume thereof by producing work; the expansion chamber is then kept at a maximum volume during expansion of the engine cylinder driving back the engine piston in its downward stroke, providing work of its own. During exhaust, the two pistons travel in an upward stroke and simultaneously reach top dead center in order to resume a new cycle.

To provide a muffler structure capable of lowering muffler cost. A muffler structure is provided in which a sound absorbing material is laid on the inside surface of an outer tube. The sound absorbing material is retained by an inner tube made of a metal that is punched with a plurality of holes. The inner tube is divided into a plurality of expansion chambers. Exhaust gas from an engine is led into the fiat expansion chamber by an inlet pipe. The exhaust gas is discharged out after being supplied to the second and third expansion chambers in succession through the connecting pipes. In the muffler structure, the inner tube is made of an approximately flat metal that is punched with a plurality of holes by bending the metal into circular form until its opposite edges are butted to each other, and is fitted in the outer tube, with the butt portions not jointed, so that the butt portions will come behind the connecting pipe when viewed from the inlet pipe side.

A rivet gun includes a pneumatic motor (4), that drives a segment stem 7. A pneumatic cylinder (21) actuates a hydraulic cylinder (22) which sends oil under pressure to an expansion chamber (10) provided for moving back the segment stem (7) and buckling the rivet (2) fixing it to a laminate structure (100). The rivet gun also includes a change-over switching device (30) linked to controls (50,60) for reversing rotation of the motor (4). The controls (60) include an inlet valve (61) operated by a trigger (64) for connecting a compressed air infeed duct 14 with a feed-discharge duct (23) leading to the pneumatic cylinder (21). A discharge valve (63) is disposed in series with the inlet valve (61) and has an adjustment ring (176) for adjusting of the maximum traction force. Another discharge valve (90) is disposed in series with the discharge valve (63) previously mentioned and is provided for adjustment of the stroke of the segment stem (7).

A nozzle assembly for a material application device includes an expansion chamber for slowing down the velocity of powder fed to the nozzle from a dense phase pump. The nozzle assembly includes a nozzle insert that forms the expansion chamber and provides air assist function. The nozzle includes an integral deflector, and further includes a passageway for a charging electrode so that the electrical path is routed away from the powder path, while permitting the electrode tip to be centered in the powder spray pattern from the nozzle. The nozzle also includes air wash for the electrode. The nozzle outlet orifice has a cross-sectional area that is equal to or greater than the inlet cross-sectional area so that a slow moving dense phase powder cloud is produced by the nozzle.

An airbag module for a vehicle includes a gas generator for generating a gas and a multi-chamber airbag operatively connected to the gas generator for receiving the gas. The airbag defines a first inflation chamber, at least one second inflation chamber, at least one third inflation chamber and a fourth inflation chamber. The airbag includes internal vents configured to allow selective communication between the first chamber and each of the at least one second chamber and the at least one third chamber and selective communication between the at least one second chamber and the fourth chamber. The internal vents are configured to maintain a higher pressure in selective chambers by restricting ability of the gas to escape the selective chamber. The order of internal venting between the respective inflation chambers controls the pressure and timing of inflation of the multi-chamber airbag.

A seat mounted side impact airbag module for protecting an occupant of a vehicle has an airbag with a first inflation chamber for engaging the pelvic region of the vehicle occupant and a second inflation chamber for engaging the thoracic region of the vehicle occupant. The inflation chambers are separated by a chamber separator. An inflator provides inflation gas to fill the airbag housed in a tubular housing manifold having a first aperture and a second aperture. The housing manifold is shaped to retain the inflator and create two discrete flows of inflation gas. A first flow of inflation gas goes into the first inflation chamber via the first aperture and a second flow of inflation gas goes into the second inflation chamber via the second aperture. The chamber separator is tightly sealed around the housing manifold to prevent the first flow and second flow to pass into the other inflation chamber. The chamber separator may be rubber coated with the housing manifold having a recess adapted to accept and hold the chamber separator sealed in a gas tight manner around the exterior of the housing manifold.

An exhaust system for a motorcycle having an engine mounted on a front half of a body frame of the motorcycle includes a plurality of first exhaust pipes extending from exhaust ports of the engine, a collecting section at which the first exhaust pipes are collected, a second exhaust pipe including a substantially straight portion connected to a downstream side of the collecting section and disposed under a crankcase of the engine, an expansion chamber connected to a downstream side of the second exhaust pipe and located under a rear wheel suspension arranged behind the engine, an exhaust outlet disposed on a most downstream portion of the expansion chamber, and an exhaust throttle valve and an exhaust gas sensor disposed on the straight portion of the second exhaust pipe.

A portable surface cleaning apparatus including a base module for movement along a surface , an upright handle pivotally attached to the base module, a liquid dispensing system including a flexible bladder defining a fluid supply chamber for holding a supply of cleaning fluid , a fluid recovery system including a tank on the base module having a fluid recovery chamber for holding recovered fluid and housing the flexible bladder, and a fluid passageway between the fluid supply chamber and the recovery chamber, whereby the recovery chamber is in fluid communication with the fluid supply chamber and the pressure in the flexible bladder is equalized with the pressure in the tank as the cleaning fluid is dispensed from the supply chamber and the dirty liquid is collected in the recovery chamber. In a further embodiment the tank has an outlet opening in a bottom portion thereof and a drain plug is removably mounted in the outlet opening. In another embodiment a lid mounted on the tank defines an expansion chamber having an inlet opening, an outlet passage, and first and second diverters against which the working air flow reverses direction twice between the inlet opening of the expansion chamber and the tank. In another embodiment the working air conduit includes a manual actuator knob having an over-center linkage mechanism connected to a conversion valve for movement between first and second positions and thereby selectively moving the conversion valve between open and closed positions, whereby fluid communication between the tank and the suction nozzle is selectively opened and closed. In a further embodiment, a flow indicator is mounted to the base module and has a visibility window observable to a user and the flow indicator is disposed in the fluid supply conduit and is responsive to the flow of fluid through the fluid supply conduit to visually indicate the flow of fluid through the supply conduit to the user. Another embodiment includes a pump primer connected to the pump and having a housing defining a priming chamber with a valved opening connected to the vacuum source, an inlet opening connected to the fluid supply chamber, and an outlet opening connected to an inlet for the pump. A further embodiment includes a first mechanical connector extending between the motor drive shaft and the pump drive shaft, whereby the motor drives both the agitation brush and the pump. In a further embodiment, the base module includes an upper housing portion and a lower housing portion and an upright handle is pivotably mounted to the rear portion of the base module through at least one bearing for rotatable reception in the housing. In another embodiment , an elevator assembly is reciprocally mounted to the base module and movable in response to movement of the upright handle from an operative position to the upright position for upwardly pivoting a pivot arm mounting an agitation brush.

The invention concerns a damping device for damping the kinetic energy of movable cabinet components, which has a first damping element with a first cylinder that has a first piston, which slides lengthwise in it, and at least one more (second) damping element with a second cylinder that has a second piston, which slides lengthwise in it. Both damping elements are located one behind the other in a serial arrangement and form an integral system. The invention is characterized by the fact that each of the two damping elements are each designed as pneumatic (air) dampers, and a compression chamber and an expansion chamber respectively contain variable volumes; whereby, the damping effects of the damping elements are affected by the guide canals, which control the air distribution and air flow within and between the compression chambers and / or expansion chambers.

Turbofan jet engines utilizing the Carnot cycle for improved performance with isothermal compression of combustion air and, in part, isothermal expansion of thermally heated air, the engines having a turbofan compressor rotor with hollow fan blades in a core bypass passage through the engine and an annular, peripheral thermal chamber with staged turbine blades in an expansion chamber where heated gases are supplied to multiple stages to maintain peak temperatures.

A double-acting pump for ejecting a product from a container includes a piston which is axially slideable in a housing and is sealed by the housing. A hollow piston rod extends the axial bore of the piston and is slideable in a closing cap and has an actuating head, wherein, when the actuating head is actuated, the piston builds up a pressure in a pressure chamber against a restoring force of a spring. An outlet duct extends through the actuating head to an outlet opening. When subjected to the restoring force of the spring, the piston releases a passage between the pressure chamber and openings of a second housing portion. A medium which kills germs and bacteria is arranged in an expansion chamber. The dispensing stroke volume of the piston corresponds to the volume of a drop of the liquid.

A process for producing a tire having an expandable chamber utilized for extending and retracting studs provided in the periphery of the tire. In one embodiment, a non-stick film is strategically positioned between the casing and the tread prior to curing the tread onto the casing. The interface at either side of the film forms the sides of an expandable chamber. The tread side of the chamber is inset and studs are affixed thereto. Expansion of the chamber extends the studs out of the inset and into engagement with a road surface. Alternative processes provide a channel in the tread and the expansion chamber formed in the channel.