Abstract: This invention relates to a packaged sterile wound dressing comprising a dressing saturated with a pain relieving composition, a method of providing pain relief due to a wound of a subject using said dressing, and a method of manufacturing the packaged sterile wound dressing.

Abstract: An oil separation assembly for use in a high pressure reciprocating compressor is provided. The compressor includes a suction chamber, a crankcase chamber, and at least one partition member at least partially separating the suction chamber and the crankcase chamber. The at least one partition member includes at least one opening. The oil separation assembly can include at least one demisting structure positioned within the crankcase chamber adjacent the at least one partition member at the at least one opening. At least one securing structure can be secured in operable relation with the at least one demisting structure so as to secure the at least one demisting structure relative to the opening. The oil separation assembly can further include a second demisting structure positioned within the suction chamber adjacent the at least one partition member at the at least one opening.

Abstract: A multiport assembly includes a shell defining a cavity, a plurality of apertures extending through the shell to the cavity, and a plurality of optical connector ports defining connector insertion paths, a plurality of optical adapter assemblies positioned within the cavity of the shell, and a plurality of sealing piston securing members associated with respective ones of the connector insertion paths, where each of the sealing piston securing members is repositionable between an engaged position, in which at least a portion of the sealing piston securing member intersects the connector insertion path, and a disengaged position, in which a securing portion of the sealing piston securing member is spaced apart from the connector insertion path, and where a width of a button portion of each of the sealing piston securing members is greater than width defined by each of the plurality of apertures.

Abstract: A piston pump is provided comprising a cylinder with an inner cylinder wall and a working space. The piston pump includes a piston inside the cylinder and has a piston head with a first and second projections extending from its lateral surface to the cylinder wall. These first and second projections enclose a cavity between the piston head and the cylinder wall. The piston head also includes a channel for routing a flushing fluid to the cavity. The first and second projections are configured to promote flow of the flushing fluid out of the cavity and into the working space of the cylinder.

Abstract: An apparatus for screening earth formation components and a method of making the apparatus, the apparatus including a base pipe configured to allow the passage of formation fluid therethrough, and a foam layer disposed radially outwardly of the base pipe and configured to allow the passage of formation fluid therethrough and minimize the passage of formation solids therethrough, the foam layer-including a plurality of hollow structures forming windows therebetween.

Abstract: A port shield assembly includes a cup, a fitting, and a retaining pin. The cup includes a top with a hole, a sidewall, a cavity defined by the top and the sidewall, and a side port in the side wall. The fitting includes a body with a first end and a second end, a flange at the first end, and a central bore extending from the first end. The fitting also includes a port that communicates with the central bore, and a cross bore near the second end. The fitting extends through the hole of the cup and a retaining pin is disposed in the cross bore to retain the cup between the first end and the second end of the fitting.

Abstract: In general, a piston-type pump includes a wash flow path that allows a wash liquid such as water to pass through to provide washing and cleaning as the pump operates. The pump may be used in precision liquid dispensing systems and particularly with liquid solutions that have a tendency to precipitate solid particulate. By washing a portion of the pump piston, the liquid solution being dispensed and any solid particulates may be carried away and removed from the pump.

Abstract: The present invention refers to a fuel mixture that contains combustible solid powder and produced by mixing combustible solid powder and liquid fuel. It is in a simple way to make use of renewable biomass materials instead of fossil fuel for driving internal combustion engine to provide powder, in favor of saving fossil fuel resource. And an engine can use the fuel mixture.

Abstract: The compressor is provided with an oil separator for separating oil from refrigerant gas introduced into a separation chamber, an annular space for reserving oil separated from the refrigerant gas, and a reservoir chamber for reserving the thus separated oil. The oil separator is provided in a cylindrical hole formed in a discharge chamber from which the refrigerant gas is discharged and a lid for partitioning the cylindrical hole from the discharge chamber is provided in the cylindrical hole. The oil separator introduces the refrigerant gas from the discharge chamber to the separation chamber via the introduction passage. The annular space is provided around the lid and connected to the reservoir chamber via an oil passage. The reservoir chamber is connected to a crank chamber of a pressure lower than that in the discharge chamber.

Abstract: The invention relates to a fluid system for a pump circuit (10), in particular a hydraulic high-pressure pump circuit, having a function block (12), in the housing of which fluid-conducting paths extend and to which valve components (32, 46) can be connected at least partially. The filter device is an at least partially integrated constituent part of the function block of the fluid system as a result of the fact that a filter device (46) with its filter housing (56) can be connected to the function block (12) in such a way that at least one filter element (70) is received in the installation space (72) of the function block.

Abstract: Disclosed is a hydraulic pump for a brake system including a piston installed in a bore formed in the modulator block having an inlet and an outlet such that the piston can reciprocate and having a channel communicating with the inlet, a plug installed in the bore for dividing the inside of the bore into a pressure chamber, in which the piston is located, and a discharge chamber communicating with the outlet and having an orifice communicating the pressure chamber and the discharge chamber with each other, and a discharge valve installed in the discharge chamber for opening and closing the orifice, wherein a filter for filtering oil, fed into the bore through the inlet, is installed in the bore, and surrounds the outer surface of the piston so as to guide the piston. Since the filter for filtering the oil serves as a guide member guiding the piston as well as a filtering member, the hydraulic pump reduces the number of components and reduces an occupied space.

Abstract: An adjusting system of a motor vehicle for the adjustment of a locking piece is disclosed. The locking piece may be arranged to close a motor vehicle opening. The adjusting system includes a first and second casing extending oblong-wise in a length-wise direction. The second casing has a smaller cross section than the first and is arranged within the first casing so as to be adjustable in the length-wise direction. Sealing elements are arranged on the casings to protect them against humidity and soiling. A pressure compensation opening is also included and is arranged to compensate for pressure between a casing interior space and a casing environment.

Abstract: A non-pressure head for a fluid cylinder, which includes a drain channel formed in the flange by a raised portion of the flange extending from a plane of the flange in the same direction as the head portion. The channel is cold formed in the flange. For the piston stop, the flange has an opening of a diameter smaller than a diameter of a piston on the piston rod to form a stop for the piston. A plurality of spaced ribs are provided between the flange and the head. The ribs are raised portions of the flange and the head and are cold formed in the flange and the head.

Abstract: Disclosed is a water softener capable of producing soft water at various temperatures and facilitating the regeneration of an ion exchange resin thereof. The water softener includes a water softening tank in which an internal region containing therein the ion exchange resin is partitioned into a plurality of water softening regions which are individually assigned into a predetermined temperature; a regeneration tank integrated with the water softening tank into a single body and containing the regeneration material of the ion exchange resin; a cold/hot control valve to supply raw water to a selected one of the plurality of water softening regions according to the temperature of the raw water to rapidly supply the soft water at a desired temperature to a user; and a regeneration valve to facilitate the periodic regeneration of the ion exchange resin through a simple manual operation.

Abstract: A pump (1) with an oscillating part having a housing (2) with a working chamber (3) and a crankcase (4) defined from the working chamber by the pump part. A pump drive mechanism (6) with a drive shaft (7) is located inside the crankcase (4) and the drive shaft is mounted on bearings (8, 9) that are arranged in the walls of the crankcase. The pump has a suction inlet separate from the crankcase. The pump (1) includes at least one flow channel in the crankcase wall for compensating pressure in the crankcase when the pump part oscillates and a flow damper arranged in the at least one flow channel. In a preferred embodiment, the at least one passage hole having at least one bearing therein is configured as the flow channel.

Abstract: A piston pump for an electronically controllable vehicle brake system including a particularly simple, inexpensive, and space-saving throttle, and a filter hydraulically upstream of it, which prevents the throttle from becoming clogged with impurities. The pressure fluid outlet is routed at least partway along the circumferential surface of the bushing and, in the region of this section, the filter and throttle are embodied in one piece with the circumferential surface of the bushing.

Abstract: A brake actuator assembly includes a housing defining a spring chamber. A spring is disposed in the spring chamber, the spring being biased toward an extended position and movable against the bias toward a caged position. A release assembly is provided for selectively moving and retaining the spring against the bias toward the caged position, the release assembly comprising a hollow release bolt having a fluid passage passing therethrough by which fluid passage the spring chamber is in fluid communication with an environment surrounding the housing. A filter is disposed within the fluid passage in the hollow release bolt for filtering fluid passing through the fluid passage.

Abstract: A brake actuator assembly includes a housing defining a spring chamber. A spring is disposed in the spring chamber, the spring being biased toward an extended position and movable against the bias toward a caged position. A release assembly is provided for selectively moving and retaining the spring against the bias toward the caged position, the release assembly comprising a hollow release bolt having a fluid passage passing therethrough by which fluid passage the spring chamber is in fluid communication with an environment surrounding the housing. A filter is disposed within the fluid passage in the hollow release bolt for filtering fluid passing through the fluid passage.

Abstract: A lightweight spacer for mounting a vacuum brake booster on a panel provides integral flexible sealing lips to seal the interfaces between the panel, spacer, and booster. Integral retaining tabs are provided for holding the spacer in place on the booster during shipping and installation of the booster. Tubular inserts within the spacer are retained and cushioned against rattling by a thin web of material extending over the end of the insert.

Abstract: The invention relates to a piston pump for a hydraulic, slip-controlled vehicle brake system. The piston pump has a piston, which is inserted with a part of its length into a sleeve. A tubular filter that encompasses the piston is attached to the sleeve and constitutes a captive retainer, which secures the piston in a captive fashion in the sleeve. In order to reduce an axial mobility of a sealing ring that seals the piston in the pump housing, the invention proposes attaching the filter, which limits the axial mobility of the sealing ring, to the sleeve in an axially mobile fashion.

Abstract: A spacer for separating a brake booster from a wall comprises a support and a boot. The support is disposed between the booster and the wall, and has a breather port. The boot is integral with the support, and has a generally conical shape tapering from the wall toward a push rod of the booster.

Abstract: A control valve retaining element (22) for a brake booster (10) has a hollow cylindrical base member (28) and a first retaining collar (30), which is connected to the base member (28) and has at least one side wall for supporting a bellows end (20). To enable such a retaining element to be manufactured less expensively and positioned easily and securely on an actuating rod (16) of a brake booster (10), a second retaining collar (36) extends radially inwards from a first end of the base member (28) and in peripheral direction, wherein the second retaining collar (36) comprises a first lateral face (38) for cooperation with a stop (44) of the actuating rod (16) and a second lateral face (40) lying opposite the first lateral face (38) for cooperation with a compression spring (46).

Abstract: The present invention relates to a vacuum brake force booster which includes a valve piston with a pedal push rod that is axially slidable in a vacuum housing, further including a control housing and a poppet valve connected to the valve piston, and an air filter. The air filter is arranged in the valve piston and forms, in conjunction with an associated valve piston sealing seat for the air filter abuttable thereon, a variable flow cross-section for the outside air that flows through the poppet valve.

Abstract: A spring brake actuator has a sealed spring chamber with a hot set large force compression spring. An alternative embodiment has the hot set spring guided by the actuator rod.

Abstract: Disclosed is an easily removable and replaceable filter for attachment to the breather holes in the housing of a spring or service brake actuator. The invention has a hollow shaft and flange for snap fitment into a brake actuator breather hole, and includes a plurality of ventilation openings and a membrane made of material which allows air to pass into and out of the spring brake housing, while keeping foreign material out. The present invention may be easily adapted for use on any of a large number of existing spring or service brake housing assemblies (including piston, diaphragm, dual-diaphragm, dual-piston, and/or piston & diaphragm) at minimal cost. When the filter(s) of the present invention are installed, any unused breather openings in the spring brake housing should be plugged so that all air is filtered through the membrane in the filter.

Abstract: A piston pump which is intended for use in a vehicle for a hydraulic, slip-controlled braking system. To enable producing the piston pump inexpensively, a bush is made without undercuts as an upset part integrally with a bottom which has a valve seat for the outlet valve of the piston pump.

Abstract: A piston pump for a slip-controlled hydraulic brake system for a vehicle. A tubular filter is mounted on a bush of the piston pump; the filter has a filter ring that forms a guide ring and is spaced apart from the bush and axially guides the piston by a part of the piston that protrudes from the bush. A separate guide ring is dispensed with, and the structural length of the piston pump can be shortened.

Abstract: A piston pump with a piston that is displaceable in a bush. In order to keep the piston in the bush for retention therein a hollow-cylindrical filter, mounted on the bush, with yielding fingers that engage a groove of the piston keep the piston in the bush until the bush has been inserted into a pump housing.

Abstract: A pneumatic brake booster having a valve (7) actuated by movement of an operating rod (8) within a hub (6) from a position of rest to an extreme actuation position. In the position of rest, the valve (7) is closed to a pressure source (A) and when moved toward the extreme actuation opened to the pressure source (A). A purification filter (9) located between the pressure source (A) and valve (7) is made of a compressible material which has a minimum volume with the valve in the rest position and a maximum volume when the operating rod (8) reaches the extreme actuation position.

Abstract: The invention relates to a piston pump having a piston that is axially displaceable in a bush. In order to keep the piston in the bush in a manner secured against loss, a tubular filter is secured to the bush in the extension thereof; the filter has a smaller inside diameter than the bush and in this way keeps the piston in the bush.

Abstract: A brake system has a brake booster secured to a dash panel which separates an engine compartment from a passenger compartment of a vehicle. A bracket off-sets the booster into the engine compartment from the dash panel. A cylindrical body has a flange on a first end located between the housing of the brake booster and the bracket. The cylindrical body has a partition wall located between the first end and a second end and a radial opening located between the partition wall and the second end. The partition wall has a central opening through which an input rod extends to provide a valve with an input force. An end boot, secured to the second end of the cylindrical body and the input rod, forms a resonant chamber within the cylindrical body. The radial opening provides unrestricted communication air from the engine compartment to the resonant chamber while the central opening forms an orifice to control the air flow from the resonant chamber into the valve body.

Abstract: A compressor having a cam plate disposed in a crank chamber and mounted on a drive shaft. The cam plate is tiltable between a maximum inclined angle position and a minimum inclined angle position with respect to a plane perpendicular to an axis of the drive shaft according to a differential pressure in the crank chamber and in a cylinder bore. The cam plate varies the stroke of a piston based on an inclination thereof to control the displacement of the compressor. A supply passage connects a discharge chamber with the crank chamber to deliver the gas from the discharge chamber to the crank chamber. The supply passage has an inlet that is open in the discharge chamber. A control valve is disposed midway on the supply passage. The control valve adjusts the amount of the gas introduced into the crank chamber from the discharge chamber through the supply passage to control the pressure in the crank chamber. A filter is disposed at the inlet of the supply passage to filter the oil.

Abstract: A gas supply apparatus (1) particularly for supplying oxygen comprises a gas separator (2) for separating oxygen from the other constituents of the air. The oxygen passes to a piston cavity (6) of a compressor unit (7) where it is compressed and passed to a storage means (12) from where it can be dispensed via a pressure regulator (13) to a number of emergency oxygen masks (14). The compressor unit (7) includes a number of moving parts lubricated by oil within a first cavity (8). Cavity (8) is separated from the piston cavity (6) by a purge cavity (9). In the event of an oil leak from the first cavity (8), the oil will gather in the purge cavity (9) where it is purged therefrom by the waste gas from the separator unit (2) after the oxygen has been removed. If any of the waste gas leaks from the purge cavity (9) into the piston cavity (6) it will mix with the oxygen compressed therein and form a safe mixture.

Abstract: A passive compressor is disclosed which includes a free piston or a flexible membrane whose movement is controlled by pressure variations in a main chamber. The pressure in the main chamber changes according to the pressure in the motor crankcase, as the main chamber is coupled to the crankcase by a crankcase transfer passage duct.As the free piston or flexible membrane moves towards the main chamber, it causes a pressure decrease in the air chamber which subsequently admits external air through an inlet valve. When the free piston or the flexible membrane moves in the direction of the air chamber, the increased pressure on the piston or membrane forces the external air into the motor cylinder, through an air transfer passage duct, and towards a port on the cylinder that is opened due to the position of the motor piston. The inlet valve prevents the loss of pressure in the air chamber. Alternatively, the main chamber may be directly attached to the motor crankcase.

Abstract: A power cylinder (10) has two pistons (12, 20) slidably mounted within separate cylinders (14, 22) to define inner and outer chambers (16, 18; 24, 26) within each cylinder. One or more rods (28) are coupled between the pistons. The outer chambers (18, 26) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The inner chambers (16, 24) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The fluid flow aforesaid may be achieved by using two hollow rods (128, 130) and allowing the fluid to flow through the rods between the respective chambers. A guard (44) may surround first and second cylinders (14, 22). Bearings (46, 48) may be fixed around the opposed inner ends of cylinders (14, 22) to allow slidable displacement of the cylinders relative to guard (44).

Abstract: Filtrate separating device having a pair of walls connected by a frame defining a receiving space for sludge to be filtered. The walls being displaceable away from one another, and made of a flexibly deformable liquid and gas impermeable material.

Abstract: A boot (19) protecting the pedal-sided end (18) of the control valve housing (5) of a vacuum brake force booster is fixed by a spacer. The spacer is preferably configured as a dual-walled annular sleeve (20). It is axially secured in the same position as a ring sealing the control valve housing (5) against the booster housing (1). An axial extension (26) of sleeve (20) insures that the boot (19) is kept remote from the booster housing (1) and from the control valve housing (5), respectively, so that air can be taken in between boot (19) and control valve housing (5) for ventilating the working chamber (3). This design allows the air required for ventilation to travel very closely to the baffle wall, thereby minimizing noise in the passenger cabin of the automobile.

Abstract: The invention provides a brake booster including in a preferred embodiment a housing, first and second annular flexible diaphragms spaced from one another forming a sealed second chamber within the housing and a sealed first chamber between the first diaphragm and the first end of the housing, a generally annular shaped power piston for connection with the master cylinder piston, a chamber valve seat separating the first and second chambers, an inlet valve slidably mounted within the power piston, and a control valve spring biased away from the power piston and connected with the pedal linkage and being slidably and sealably mounted within first end of the housing.

Abstract: A fluid power apparatus (10) includes a power piston (40) dividing a working chamber (18) from a first chamber (16), the power piston (40) biased toward a rest position by a spring (17) and the piston (40) displaced by means of restricting fluid flow between the working chamber (18) and first chamber (16). In order to keep contaminants from entering the first chamber (16), a collapsible filter (80) is disposed about a piston rod (13) of the power pistion (40), the filter (80) having at an end cap (88) with a central opening (91) through which extends the piston rod (13) and at an opposite end member (98) a flange (95) which serves as a seat (97) for the spring (17). The end member (98) seats sealingly against the power piston (40) while the end cap (88) has a sealing mechanism (92) about the periphery of the central opening (91) to provide sealing between the end cap (88) and input rod (13).

Abstract: The invention provides an open breather chamber in front of the breather chamber proper with the cross-sectional and length ratios lying within certain configurations so that solids, fluid and steam particles will enter the breather chamber and not cause problems within a chamber containing working components.

Abstract: A pressure switch comprising a housing, a diaphragm that divides the inside of the housing into a pressure chamber and an atmospheric chamber, a switch portion mounted in the atmospheric chamber, and a resilient cap fitted over the housing. A porous filter is held between the housing and the cap. The diaphragm is actuated according to the difference between the pressures inside the chambers. The switch portion consists of a movable contact and a fixed contact, and is connected to terminals.

Abstract: The pressure relief valve is debris resistant, self-cleaning, and self-actuating in a cryopump. It includes an o-ring carried by a valve member within a valve cylinder. In opening, the valve member moves away from an end port to open vent ports in the side of the valve cylinder while withdrawing the o-ring to a debris free and protected region of the valve. As the valve member is moved into the closed position in response to an atmospherical pressure differential, a wiper ring cleans debris from the inner surface of the valve cylinder. A taper is provided on the inner surface of the cylinder to release compression on the vacuum sealing o-ring upon opening and to compress the o-ring as the valve member moves to the closed position. The wiper ring is expansible in order to provide a wiping action along the entire taper and prevent debris from reaching the o-ring. The end of the valve cylinder opposite to the end port serves as a shock absorber as the valve is opened.

Abstract: A muffler device for use in a brake booster system in which there are inserted in an air suction passage cylindrical noise shielding member having at one end an outer flanged portion extending radially outwardly and at the other end an inner flanged portion extending radially inwardly, the circumferential wall of the noise shielding means being defined with an air suction opening; and cylindrical noise absorbing member with a gas permeability being inserted into the inner circumference of the circumferential wall, in such a manner that noises as generated at the valve mechanism during the operation of the brake booster may effectively be prevented from propagating to the outside by aid of the noise shielding member and the noise absorbing member together.

Abstract: The system for generating braking pressure, consisting of a pneumatic assistance servomotor (2) mounted so as to overhang on a master cylinder (1) which it actuates by a tubular pullrod component (14) in which extends the control pushrod (11) of the distribution valve (10), incorporates a pre-assembled unitary valve assembly (10) screwed to the end of the tubular pullrod component (14) so as to connect the latter to the movable piston wall (6) of the servomotor, the valve (10) being linked by a cylindrical flexible sealing component (50) to a central annular zone (19) of the front wall (4) of the servomotor casing which is closed by a labyrinth filtering structure (80) with draining means (86).

Abstract: In a compressor which includes an upper and lower head portions and an interposed diaphragm, provisions are made for increasing the service life of the diaphragm by reducing the incidence failure of the diaphragm due to fretting products and airborne contaminants, which collect at the outer edge of the diaphragm which results in stress concentrations at the outer edge of the diaphragm, and specifically by providing a plurality of concentric grooves in the upper head of the compressor to remove the fretting products and gas borne contaminants from build up at the outer edge of the diaphragm.

Abstract: A motor-driven radial plunger pump has an outer housing enclosing a motor section and a pump section drivingly connected thereto. The motor section has a motor housing cooperating with the outer housing to define a fluid passage having a fluid inlet adjacent to a part of the motor housing in which a brush unit is disposed. The fluid passage contains a filter element and has a recess disposed upstream thereof and adjacent to motor magnets so that magnetic particles contained in the fluid flow are magnetically adhered to and deposited on the bottom of the recess. The pump section has a rotor with radial plungers slidably disposed in cylinder bores in the rotor. The cylinder bores have radially inner end successively communicated with a suction passage communicated with the fluid passage between the outer and motor housings through feed holes formed in a coupling disc plate drivingly connecting the motor with the rotor.

Abstract: A plunger apparatus for pumping fluid in a well having a tubular barrel, the apparatus providing an upper portion adapted to be secured on a tubing string for axial movement within the barrel, the upper portion providing a bore axially therethrough and mounting a filter element in communication with a plurality of passages communicating transversely through the upper portion from the bore to an interface defined between the exterior surface of the upper portion and the well barrel; an elongated, sleeve-like intermediate portion secured on the upper portion and providing a bore axially therethrough; and a lower portion secured on the intermediate portion and providing a bore axially therethrough and mounting a valve member internally of the bore; and a plurality of sealing members circumscribing the upper portion and lower portion and bounding the interface defined between the apparatus and the well barrel.

Abstract: A hermetically sealed, creep acting pressure switch has a sensor assembly comprising a bulged metallic membrane welded between a port fitting and a support. A switch assembly, attached to the sensor assembly, includes a housing which has a switch chamber in which, in one embodiment, a pair of stationary contacts are mounted. A piston having a force receiving surface at one end is biased into engagement with the membrane with an adjustable calibrated force. An electrically conductive contact bridge is mounted on and is movable with the piston. The switch can be normally open or normally closed depending on which side of the contact bridge the stationary contacts are mounted. In an alternate embodiment a miniature switch is mounted in the switch chamber and is adapted to be actuated by the piston.

Abstract: A double action slurry pump is provided having a shelf-flushing piston assembly mounted in a mating cylinder. The piston assembly includes a first piston having a peripheral sealing means and a reciprocating piston rod for driving the first piston. Second and third power pistons mounted adjacent opposite sides of the first piston include sealing discs and form respective first and second chambers with the first piston and the adjacent cylinder wall. The second and third power pistons serve to pump the slurry on the sides opposite the flushing fluid chambers. Each of the pumping pistons includes hollow carriers that cooperate with shoulders fixed to the piston rod to provide limited lost motion movement. The resulting lost motion serves to vary the size of the first and second chambers. During the stroke of the piston assembly in one direction, feed lines in the piston rod provide flushing fluid to the expanding second chamber.

Abstract: Apparatus and method for hydraulic actuation via multiple synchronized hydraulic motors with air purging, synchronizing, and force limiting features.