Abstract: Described generally herein are tissue therapy devices, which may comprise a sealant layer and a suction apparatus. The sealant layer functions so as to create a sealed enclosure between it and the surface of a patient by forming, preferably, an airtight seal around an area of tissue that requires negative pressure therapy. The tissue therapy device may comprise a suction apparatus. The suction apparatus is typically in fluid communication with the sealant layer and functions so as to reduce the amount of pressure present underneath the sealant layer. The reduced pressure is self-created by the suction apparatus. Together the sealant layer and the suction apparatus preferably create a closed reduced pressure therapy system. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of the air molecules under the sealant layer.

Abstract: Disclosed is a pressure damping device for a brake system. The pressure damping device is installed at the brake system having a hydraulic block provided with a first hydraulic circuit to control transfer of fluid pressures generated by a first port of a master cylinder and discharged from a first pump to a first wheel, and a second hydraulic circuit to control transfer of fluid pressures generated by a second port of the master cylinder and discharged from a second pump to a second wheel, and the hydraulic block includes a bore connecting the master cylinder with discharge outlets of the first and second pumps and formed between first and second main oil paths to communicate with the first and second main oil paths, and a pressure damping unit provided in the bore and having a volume changed according to the fluid pressures from the first and second pumps.

Abstract: The present invention relates to improvements in or relating to pump installations, It has particular relevance in the field of reciprocating piston pumps, such as condensate removal pumps which are used to remove condensate from air conditioning installations. We describe a liquid pulse damping device (20) comprising a body (21) having an inlet (22) and an outlet (23) in fluid communication. Intermediate the inlet and outlet is at least one liquid flow direction changing element (24, 25). Preferably, the at least one flow direction changing element (24, 25) is in the form of an elongate element having a closed end (30, 31) and a side wall, suitably a cylindrical side wall, having at least one bore (40) formed therethrough.

Abstract: A pressure stabilizer for mediating changes in pressure within a pipeline is provided. The pressure stabilizer incorporates a plurality of perforations about a central pipeline and a circumferential enclosure about the perforations. This structure allows excess fluid to flow from the central pipeline into the space provided between the central pipeline and the circumferential enclosure. As the pressure increases within the overflow space, the medium applies a pressure to an elastomeric membrane, which in turn transfers the pressure to a plurality of dampening materials. The elastomeric membrane can be filled with a porous material providing a smoother transition within the pressure dampening process. The elastomeric membrane and respective dampening materials can be placed within the circumferential enclosure assembled about the central pipeline or utilized with a pressure-stabilizing chamber.

Abstract: A hydraulic accumulator, especially a pulsation damper, comprises a metal bellows (19) that has a terminal element (35) which can be displaced along the wall of a housing (1) at least on one bellows end (31) during expansion and compression of the bellows (19), a guiding means (47) being interposed between the terminal element and the housing. Said guiding means comprises, on at least one peripheral zone of the terminal element (35), on its outer periphery, first annular sections (51) that are radially spaced apart from the wall of the housing (1) and that are separated from each other by second annular sections (53) and radially project over the first annular sections (51).

Abstract: A depth compensated subsea accumulator with a cylinder with a cylinder end, a first larger bore, a cylinder shoulder and a second smaller bore, a piston sealingly and slidably engaging the first large bore with a single direction seal and having a rod attached to a first side, the rod sealingly and slidably engaging the second smaller bore, the piston having a working fluid on the first side and a compressed gas on the second side, the working fluid on the first side of the piston having a higher pressure than the gas on the second side of the piston while the piston is moving between the cylinder end and the cylinder shoulder, when the piston sealingly engages the cylinder shoulder, a portion of the working fluid on the first side of the piston within a seal diameter having a lower pressure than the gas on the second side of the piston and a portion of the working fluid on the first side of the piston outside the seal diameter having a higher pressure than the gas on the second side of the piston, such that

Abstract: A tube-equipped, flanged, pressure transfer structure comprises a flange for connecting to a counterflange; a tube, which is secured to the flange; a hydraulic path, which extends from a first opening in a front end surface of the tube facing away from the flange to a second opening in the rear end surface of the flange facing away from the tube; and an isolating diaphragm, which covers the first opening and is connected pressure-tightly with the front end surface of the tube along a peripheral edge, wherein the hydraulic path is filled or fillable with a pressure transfer liquid, in order to transfer a pressure presiding at the isolating diaphragm to the second opening, wherein the tube has a front section having the end surface and a first diameter and an intermediate section with a second diameter, which is less than the first diameter, and wherein the front section is shorter than the intermediate section.

Abstract: The method and device of the present invention reduces the pulsation of fluid from a pump. The damping device and method works on either the positive pressure or negative pressure side of the pump. Under positive pressure the device is attached downstream from the outlet port of a pump, the device having an input port in fluidic communication with the outlet port of the pump, an outlet port, an outer wall with an opening, and a membrane covering the opening, the outer wall of the device and the membrane forming a contained volume. As fluid from the outlet port of the pump passes into the device, it enters the contained volume which expands and contracts, thereby vitiating the pulsations in the fluid flow downstream of the device. Alternatively, under negative pressure the device is attached upstream from the inlet port of a pump.

Abstract: A pressure compensator for a subsea device for performing a pressure compensation between an ambient medium surrounding the subsea device and a liquid medium filling a volume of the subsea device is provided. The pressure compensator has at least one outer bellow and a first chamber enclosed by the outer bellow. It further has at least one inner bellow which is arranged inside the first chamber, and a second chamber enclosed by the inner bellow. Between the outer bellow and the inner bellow, a compensation volume is confined, which is provided with a fluid connection to the volume of the subsea device.

Abstract: A low pressure accumulator for an anti-lock brake system of a vehicle. The low pressure accumulator includes a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening, a piston moving back and forth in the cylinder, a spring installed in the cylinder to elastically support the piston, and a plug installed in the opening of the cylinder to support one end of the spring. The plug includes a vent to ventilate air through an inside and an outside of the cylinder.

Abstract: A refrigerant storage device that arranges two end plates to form a cavity and includes a turbulator plate within the cavity. The turbulator plate is arranged within the cavity to reinforce the cavity by providing a plurality of reinforcement portions between the end plates. The cavity is sized and the turbulator plate is configured so a liquid portion of refrigerant flowing through the cavity collects onto the turbulator plate. The device has a rectangular shape that simplifies vehicle packaging and allows the device to be readily integrated into a plate-type refrigerant-to-liquid coolant heat exchanger. The device is formed by a stacking arrangement of parts that provides for a readily scalable design.

Abstract: The present invention is directed to a fluid conduit assembly. In accordance with one embodiment of the present invention, the inventive fluid conduit assembly includes a fluid conduit having an inlet, at least one outlet and a fluid flow passageway therebetween configured to allow for fluid to be communicated between said inlet and said at least one outlet. The inventive fluid conduit assembly further includes at least one damper disposed within the passageway of the fluid conduit. The damper includes a sealed vent configured to vent gases captured by the damper during a brazing process performed on the fluid conduit when unsealed.

Abstract: A pressure store comprising sub-chambers (8, 54, 28) arranged in a housing (2), a first sub-chamber (8) arranged between the housing (2) and a flexible separating diaphragm (40), a second sub-chamber (54) arranged between the separating diaphragm (40) and a supporting body (48), and a third sub-chamber (28) encompassed by the supporting body (48), wherein the first sub-chamber (8) can be filled with a first fluid, wherein the second sub-chamber (54) and the third sub-chamber (28) are connected to one another in fluid-conducting fashion and can be filled with a second fluid, and wherein the first and the second sub-chamber (8, 54) vary in terms of their respective sizes as a result of movements of the separating diaphragm (40) as a function of the respective filling state, is characterized in that the first fluid is a storage medium and the second fluid is a working medium, and in that the second sub-chamber (54) is increased in size during the extraction of storage medium from the pressure store and is reduce

Abstract: A guiding device for a metal bellows (3), on at least one bellows end (37) movable along the wall of a housing (10) during the expansion and contraction of the bellows (3). A guiding element is provided between the end body and the housing (10). The guiding element is formed by a plurality of separate guiding bodies (49) disposed in intervals from each other on the circumference of the end body (39).

Abstract: A surge tank is sized to retain a volume of fluid. A fluid inlet/outlet port is attached to the tank, and an elastomeric bladder is disposed within the tank and separates the fluid from a volume of gas. A nozzle system is disposed within the tank and has a nozzle member comprising a first plurality of axially elongate perforations, and a second plurality of perforations. The nozzle member can extend a partial or complete distance with tank. The tank body includes a throat that extends outwardly from a portion of the tank adjacent the port, and a portion of the nozzle member comprising the first plurality of perforations is disposed within the throat. An annular space exists adjacent the nozzle member in the neck to facilitate the flow of solid constituent within the fluid from the tank and into the nozzle member.

Abstract: A pressure compensator is configured to compensate for volume variations of an insulation medium or other liquid of a subsea installation. The pressure compensator includes a first bellows chamber having a first bellows part. The first bellows chamber is in flow connection with an insulation medium or liquid chamber of the subsea installation, and the walls of the first bellows chamber are configured to separate the insulating medium from surroundings. The first bellows chamber is surrounded by a second bellows chamber having an end wall, a side wall and a second bellows part formed by a diaphragm. The second bellows chamber is configured to form a closed intermediate space around the first bellows chamber. The walls of the second bellows chamber are configured to separate at least the bellows parts of the first bellows chamber from the surrounding water. The second bellows chamber is filled with an intermediate medium.

Abstract: The invention is a combination accumulator and reservoir which stores energy when the accumulator deforms from its original shape in response to the flow of a pressurized fluid from the reservoir. The stored energy is returned when the fluid flow is reversed and the accumulator discharges the fluid and returns to its original shape. At least one part of the novelty of the invention is that the accumulator and the fluid reservoir reside in the same housing such that the volume of each varies inversely. Accordingly, the invention is more compact and weighs less than conventional accumulators. Another feature of the invention is that fluid is located around the bladder accumulator to lubricate contact between the bladder and sides of the reservoir.

Abstract: An accumulator for a hot melt dispensing system includes an accumulator body; a flow passage through which hot melt adhesive flows to a dispenser; an energy storage device for storing energy based on pressure of the hot melt adhesive in the flow passage and using stored energy to apply pressure to the hot melt adhesive when pressure in the flow passage decreases; and a heating element for heating the hot melt adhesive in the accumulator.

Abstract: Pressure compensation device (100) deployed in an element that contains a flammable substance that compensates pressures between interior (101) of the element and exterior atmosphere (102) in which said element is deployed, by means of a continuous primary circulation (300) of air through primary channel (103) in said device (110) that communicates interior (100) and exterior (102) of the element, further comprising a secondary channel (104) integrated in the device (100) itself, communicating interior (102) and exterior (102) of the element, comprising said secondary channel (104) in the interior zone of the element a sheet (105) such that, in the event primary continuous circulation (300) of air through primary channel (103) is interrupted, said continuous circulation continues through secondary circulation (400) of air to interior (101) of the element, this secondary circulation (400) of air being capable of breaking sheet (105) of secondary channel (104).

Abstract: A device for storing fluid, of a transmission hydraulic system, having at least one storage chamber that is defined by a housing and a delimiting device, which can be connected with the hydraulic system. The volume of the chamber depends on operation of the delimiting device and/or the housing. The delimiting device and/or housing can be set such that the storage chamber has a defined volume, in opposition to a restoring effort of the housing and/or delimiting device, starting from an operating condition which differs from the operating condition equivalent to the minimum volume of the storage chamber toward their operating condition equivalent to the minimum storage chamber volume. When the holding device is actuated, the operating conditions of the delimiting device and/or the housing assembly vary between operating conditions in which the storage chamber volume is either a maximum or corresponds to the defined storage chamber volume.

Abstract: An accumulator for a hydraulic system includes a polymer liner defining a cavity. A metal bellows assembly is housed in the cavity and separates the cavity into a first chamber and a second chamber, with the first and second chambers isolated from one another by the bellows assembly. A composite shell substantially encases the liner. The liner and shell are configured so that the first chamber receives hydraulic fluid from and delivers hydraulic fluid through an opening in the liner and the shell as the bellows assembly expands and compresses due to pressurized gas in the second chamber balancing fluid pressure changes in the first chamber. In one embodiment, the metal bellows assembly includes hydroformed bellows.

Abstract: A pressure tank, in particular hydraulic accumulator (3, 5), has a parting element (1) separating a space (11) for a first gaseous working medium from a space for a second fluid working medium in the tank. The parting element is flexible, can move under deformation and defines a domed main parting plane extending from an annular edge (13). The parting element (1) is produced from a substance having a fluoroplastic material, preferably a substance composed entirely of fluoroplastic material.

Abstract: An apparatus useful in the assembly of printer cartridges includes a plurality of accumulator bags removeably secured to a carrier sheet. Each accumulator bag includes a first polymer film panel and a second polymer film panel welded together to form a pressurizable chamber with an aperture formed in the bag to provide access to the pressurizable chamber. An annular adhesive element is secured to each bag such that an aperture of the annular adhesive element is generally concentric with the aperture of the accumulator bag. The carrier sheet includes an upper adhesive stripe, a lower adhesive stripe, and a silicone stripe. The plurality of accumulator bags is removeably secured to the carrier sheet by adhering an upper portion of each bag to the upper adhesive stripe, adhering a lower portion of each bag to the lower adhesive stripe, and positioning the annular adhesive element in contact with the silicone stripe.

Abstract: An expansion tank (10) for a vehicle cooling system (18) of an engine using a liquid coolant (16) includes a tank body (12) defining a first volume (V1) containing coolant (16), wherein the coolant defines a variable coolant elevation level (CEL) within the tank body. The tank body (12) also defines an upper volume (20) containing air. A bladder (14) is disposed in the tank body (12) and defines a second volume (V2) containing air. The bladder (14) includes a flexible membrane (36) actuated by an actuator (46). When the engine is stopped or is below a predetermined temperature, the flexible membrane (36) is moveable to a first position (FP) which lowers the coolant elevation level (CEL), and when the engine is started or reaches a predetermined temperature, the flexible membrane (36) is moveable to a second position (SP) which raises the coolant elevation level. A communicating line (38) is in fluid communication between the upper volume (20) and the second volume (V2) to fluidly communicate air therebetween.

Abstract: A compact fluid accumulator both stores a relatively large amount of fluid and provides good fluid pressure stability. The accumulator includes a piston slidably disposed in a cylinder having a fluid inlet/outlet at one end which communicates with a first chamber and one face of the piston. Engaging the opposite face of the piston, and disposed in a second chamber, is a compression spring. The second chamber is filled with a gas which is at atmospheric pressure when the accumulator is relaxed. When pressurized hydraulic fluid fills the first chamber, the piston moves against the pressure of the spring and gas in the second chamber. The present invention thus provides an accumulator having the relatively small size of a gas filled accumulator without the leakage problem of a super-atmospheric gas charge—the extra force being provided by the compression spring.

Abstract: An outer gas type or inner gas type accumulator has a mechanism for reducing a pressure difference generated when liquid in a liquid chamber and gas expand thermally at a zero-down time, the pressure difference between the inside and outside of a bellows is reduced to suppress abnormal deformation of the bellows, a movable plate supported by a spring is provided at the bellows cap side of an oil port, the movable plate is supported by the spring and away from a seal in normal operation, the movable plate is pushed by the bellows cap and contacts with the seal while elastically deforming the spring, in a zero-down state, and when the liquid and the gas expand thermally in the zero-down state, the bellows cap moves to a position where the liquid pressure and the gas pressure balance, while the movable plate keeps contact with the seal.

Abstract: To cause a safety mechanism for an emergency to be activated at lower pressure in comparison with a rupture plate, an accumulator comprises an accumulator housing, a stay having a liquid passage provided in the end surface portion on an end of a stepped tubular portion of the stay, a bellows with a bellows cap, a safety mechanism for pressure drop, and a safety mechanism for an emergency which is structured such that, in an emergency such as a fire, the bellows cap or a member held by the bellows cap presses the stay by high pressure due to the fire in the housing, to buckle the stay at a step of the stepped tubular portion, and open a liquid chamber, wherein a thin portion is provided circumferentially partially at the step of the stay to readily incline the end surface portion of the stay when the stay is buckled.

Abstract: A rotary pressure production turbine for pressurizing a hydraulic fluid is disclosed comprising a plurality of piston assemblies. Each piston assembly comprises a hollow needle piston shaft having through which hydraulic fluid is moved from a low pressure volume to a high pressure volume as the piston shaft moves in a first direction. A rotary actuator actuates each piston shaft. From the high pressure volume, hydraulic fluid is moved to a common high pressure header and delivered to an aspirated accumulator where the fluid can be stored and subsequently utilized. In some embodiments, the fluid is utilized to operate an electric generator for use in a hybrid-electric vehicle. In some embodiments, the rotary actuator is driven by an internal combustion engine, while in others the rotary actuator is driven by a vehicle drive train in a regenerative braking application.

Abstract: The invention relates to a pressure compensating device for fluid-conducting systems, with a pressure container (1) for the pressure compensation, an elastic diaphragm (3), which forms a cavity (5) for receiving the fluid, and a pressure chamber of gas (7) adjoining the cavity (5). The diaphragm (3) is connected via a connecting mount (15) to a connecting pipe (17) for the fluid. A pipe (21) for the fluid, led separately to the connecting pipe (17), extends via the connecting mount (15) into the cavity (5), while being concentrically encircled by a hollow cylinder (25) shaped like a sieve, which defines an annular space (27) and opens into an end piece (29), into which the pipe (21) opens. Moreover the end piece (29) features sieve-like perforations (31) for the fluid to flow out into the cavity (5). The separately led pipe (21) extends into the fluid-conducting system, while the connecting pipe (17) for the fluid opens into the fluid-conducting system.

Abstract: A pulsation damping capsule for connection to the pressure side of a piston pump having a metal membrane housing that is assembled from two membrane shells joined together in a hermetically sealed manner. The metal membrane housing separates an internal space from a surrounding pressure medium. The membrane shells are connected along a circumferential seam such that the pulsation damping capsule can compress and expand in a resilient-elastic manner as an energy convertor when subjected to external pressure as a result of pressure medium pulses. A reshapeable mass is arranged in the internal space and when the membrane shells are in the resilient-elastically compressed state, the mass completely fills an intermediate space that remains between the two membrane shells, so that the mass is precisely matched to the internal contour of the reshaped membrane shells while avoiding the formation of hollow spaces.

Abstract: An exemplary pump includes a pump housing defining a pump cavity, a movable pumping member situated in the pump cavity, and at least one pressure-absorbing member located inside the pump housing. The housing also has an inlet and an outlet, and includes at least one interior non-wearing location that contacts liquid in the pump housing when the pump housing is primed with the liquid. The movable pumping member, when driven to move, urges flow of the liquid from the inlet through the pump cavity to the outlet. The at least one pressure-absorbing member is located inside the pump housing at the non-wearing location and contacts the liquid. The pressure-absorbing member has a compliant property to exhibit a volumetric compression when subjected to a pressure increase in the liquid contacting the pressure-absorbing member, the volumetric compression being sufficient to alleviate at least a portion of the pressure increase.

Abstract: A pipe joint, capable of absorbing water hammer shock, includes a tubular body, an elastic gasket, an inlet conduit and an outlet conduit. The tubular body has a passageway therethrough in which the elastic gasket is disposed. The elastic gasket divides the passageway of the tubular body into a first room and a second room and defines therein a plurality of holes each communicating with the first and second rooms. The inlet conduit is joined to one end of the tubular body and has a port in fluid communication with the first room of the tubular body. And, the outlet conduit is joined to the other end of the tubular body and has a port in fluid communication with the second room of the tubular body.

Abstract: Systems and apparatus for suppressing/controlling pressure spikes in a fluid pipe system are described. In one aspect, an apparatus for controlling pressure spikes in a fluid pipe system includes, for example, a fluid pressure spike suppression pipe (“damper pipe”) portion with multiple openings for connecting to at least two network pipes in a fluid system pipe network. The damper pipe has a diameter that is larger than respective diameters of the network pipes within which fluid pressure spikes are to be suppressed. First and second openings for connecting to the network pipes are respectively positioned at proximal and distal ends of the damper pipe. The first opening in the damper pipe is for fluid ingress into the damper pipe via a first pipe network pipe. The second opening in the damper pipe is for fluid egress out of the damper pipe and into a second network pipe.

Abstract: An accumulator includes a non-cylindrical outer vessel defining a gas-filled interior chamber, and an inner member positioned in the gas-filled interior chamber. The inner member has a gas-receiving portion in fluid communication with the gas-filled interior chamber of the outer vessel for receiving gas, and a working fluid-receiving portion separate from the gas-receiving portion for receiving working fluid.

Abstract: An accumulator membrane unit (2) for inclusion into an accumulator chamber (6) in an accumulator (1) for storing hydraulic energy under pressure. The accumulator membrane unit includes membrane elements (3) that are sealingly joined at their peripheries and limit an inside membrane volume (V) which varies in dependence of a pressure at an outside of the accumulator membrane unit. The invention also concerns an accumulator, a method and a rock drilling machine.

Abstract: A pressure-compensated accumulator bottle is provided. In one embodiment, the accumulator bottle includes a housing and an interior wall that generally define first, second, and third chambers within the housing. In this embodiment, a spring is disposed in the second chamber and configured to apply a biasing force on a first piston disposed within the first chamber. Further, in this embodiment, an additional piston is disposed within the third chamber and is configured to facilitate balancing of the pressure of a fluid disposed in the second chamber with the pressure of the external environment such that the magnitude of a second biasing force applied on the first piston by the pressure of the fluid depends at least in part on the pressure of the external environment. Hydraulic circuits and systems including a pressure-compensated accumulator bottle are also disclosed.

Abstract: The present invention relates to a fluid accumulator chamber (1) of a fluid clutch device having an inner boundary wall (2) which runs around a central axis of rotation (M), having an outer boundary wall (3) which runs around axis of rotation (M), and having at least one filling opening (4) arranged in the outer boundary wall (3), wherein the outer boundary wall (3) has, at the location of the filling opening (4), a maximum spacing (R1) to the central axis (M), which spacing decreases continuously to a point (P) of minimum spacing (R3) to the central axis (M).

Abstract: Methods and apparatus to charge accumulators are described. An example system to charge an accumulator apparatus includes a piston disposed within a housing to define a first chamber adjacent a first side of the piston and a second chamber adjacent a second side of the piston. A fill probe having a body and a passageway between a first end of the fill probe and a second end of the fill probe removably couples to the piston to fluidly couple to the passageway of the fill probe to the second chamber of the housing when the accumulator is in a charging condition. A valve is fluidly coupled to the piston to enable fluid flow to the second chamber of the housing via the piston when the fill probe is coupled to the piston.

Abstract: Generally, the subject matter disclosed herein relates to length-adjustable pressure-retaining components used in piping systems. In one illustrative embodiment, a device comprising a first pressure component and an adjustable spacer ring operatively coupled to the first pressure component is disclosed, wherein the adjustable spacer ring is adapted to adjust a combined overall length of said the pressure component and the adjustable spacer ring.

Abstract: A method for manufacturing high speed pressure compensator-type drip irrigation tubes and the tubes obtained thereby having absolute radial orientation of molecular chains, the orientation imparting strength as well as flexibility to the tube material. The said method comprises extruding a tube using a plurality of extruders; blowing up the extruded tube by introducing a pressure inside the tube relatively higher than the pressure outside the tube; drawing the blown tube simultaneously to the blowing of tube; flattening the blown tube by heat welding the collapsed halves together and forming a tape immediately, subsequent to the process of blowing and drawing the tube; extrusion of a bonding polymer on one border of the tape; printing flow channels into the hot and viscous bonding polymer; and forming a tube by lengthwise folding the tape and heat welding the overlapping borders together using the bonding polymer.

Abstract: A guiding device for metal bellows (19) which comprises a terminal element (35) on at least one bellows end (31), said terminal element being movable along the wall of a housing (1) during expansion and compression of the bellows (19), a guiding means (47) being interposed between the terminal element and the housing (1). The guiding device is characterized in that the guiding means comprises at least one annular element (47) which surrounds a peripheral zone of the terminal element (35), said annular element, on its outer periphery, forming first annular sections which are radially spaced apart from the wall of the housing (1) and which are separated from each other by second annular sections that radially project over the first annular sections.

Abstract: The invention is an accumulator system in which multiple elastomeric accumulators are attached in series or parallel in order to generate total differential pressure in excess of that generated in a non-series system. Also disclosed is a “stacked” accumulator system. The system stores energy when the accumulators deform from their original shape in response to the flow of a pressurized fluid. The stored energy is available for use when the fluid is released from the accumulators and the accumulators return to their original shape.

Abstract: A hydraulic accumulator, especially a pulsation damper, comprises a metal bellows (19) that has a terminal element (35) which can be displaced along the wall of a housing (1) at least on one bellows end (31) during expansion and compression of the bellows (19), a guiding means (47) being interposed between the terminal element and the housing (1). Said guiding means comprises, on at least one peripheral zone of the terminal element (35), on its outer periphery, first annular sections (51) that are radially spaced apart from the wall of the housing (1) and that are separated from each other by second annular sections (53) that radially project over the first annular sections (51). The terminal element (35) is axially elongated by a peripheral sleeve part (63) which extends towards the immobile bellows end (29), the end of the sleeve part (63) resting as a stop element on a part (25) which is fixed to the housing when the bellows (19) is compressed.

Abstract: A volume accumulator (15), including a guide housing (33), a separating element (34) and a spring element (35). The separating element (34) is slidably mounted on an inner lateral face of the guide housing (33) and the spring element (35) is seated against the separating element (34) on one side and on the guide housing (33) on the other side. According to the invention, at least one indentation (47) is provided on the guide housing (33), with the indentation protruding into the guide housing (33). In the direction of the spring element (35), the indentation (47) has an open end against which the spring element (35) is seated.

Abstract: A fluid system comprises a pressure vessel with a baffle oriented at a skew angle. The baffle divides the vessel into first and second volumes. A first port is provided to introduce a pressurizing fluid into the first volume, and a second port is provided to circulate a working fluid within the second volume. A purge aperture is provided to purge the pressurizing fluid from the second volume across the baffle into the first volume, and a flow aperture is provided to transfer the working fluid through the baffle between the first and second volumes.

Abstract: A volume accumulator (15), including a guide housing (33) and a separating element (34), wherein the separating element (34) is slidably mounted on an inner lateral face of the guide housing (33). At least one indentation (41) is located on the guide housing (33), with the indentation protruding into the guide housing (33), wherein in the direction of the separating element (34) the indentation (41) has an open end that serves as a stop for the separating element (34). A volume accumulator (15), including a guide housing (33) and a separating element (34), wherein the separating element (34) is slidably mounted on an inner lateral face of the guide housing (33). At least one indentation (41) is located on the guide housing (33), with the indentation protruding into the guide housing (33), wherein in the direction of the separating element (34) the indentation (41) has an open end that serves as a stop for the separating element (34).

Abstract: The invention is a combination accumulator and reservoir which stores energy when the accumulator deforms from its original shape in response to the flow of a pressurized fluid from the reservoir. The stored energy is returned when the fluid flow is reversed and the accumulator discharges the fluid and returns to its original shape. At least one part of the novelty of the invention is that the accumulator and the fluid reservoir reside in the same housing such that the volume of each varies inversely. Accordingly, the invention is more compact and weighs less than conventional accumulators. Another feature of the invention is that fluid is located around the bladder accumulator to lubricate contact between the bladder and sides of the reservoir.

Abstract: The claimed innovation relates to an energy accumulator using compressed air for hybrid electric vehicles, which makes it possible to recover the electric energy generated from the vehicle kinetic energy, and store it using compressed air. This configuration increases the global efficiency, performance and operational reliability of the vehicle, reduces energy waste and ensures the availability and use of regenerating brakes in these conditions.

Abstract: A hydropneumatic accumulator includes a shell in which gas and fluid ports are connected, respectively, with gas and fluid reservoirs of variable volume separated by a movable separator. The gas reservoir contains a compressible regenerator that fills the gas reservoir so that the separator movement reducing the gas reservoir volume compresses the regenerator. The regenerator is made from leaf elements located transversally to the separator motion direction and dividing the gas reservoir into intercommunicating gas layers of variable depths. The regenerator is preferably made from interconnected elastic metal leaf elements to allow variation of the bending strain degree so that the local bending strains of the leaf elements should not exceed the elastic limits at any position of the separator. The efficiency of fluid power recuperation and durability of the regenerator are increased.

Abstract: The Water Distribution System is specifically applicable in cold climates in which water distribution systems may be subjected to freezing during the winter months. The Water Distribution System is applicable to domestic, industrial, recreational and institutional water distribution systems including water transmission and distribution mains and service connections. The Water Distribution System has applications in specific terrain and climatic conditions such as high bedrock, high groundwater table and permafrost. The Water Distribution System may, in specific terrain and climatic conditions, use uninsulated or insulated water mains and service connections, but without heat tracing or water bleeding in any case. The Water Distribution System is applicable to single and multiple complex distribution pipe systems arranged as parallel or looped, or combination of both arrangements.