Abstract: A method of forming a tube involves the punching of tabs from overlapping longitudinal seam and folding the tabs to mechanically fix the opposed lateral edges of the sheet material forming the tube.

Abstract: A pressure-stable cylinder comprises a cover having a dome shape groove and a through hole; an inner wall of the dome shape groove having threads; a cylinder having an opening and an opening section around the opening having a threaded tapered shape matching to the dome shape groove of the cover; the opening section of the cylinder being formed with a plurality of first washers; one end of the opening section having a coupling groove and a second washer; a bellow coupled to the second washer; a disk placed below the bellow; and a compressible spring placed between the disk and a bottom of the cylinder; the compressible spring resisting against the disk so that the cylinder has a predetermined pressure. In assembly, the washer and the bellow are steadily fixed to the coupling groove of the cylinder. The washers have an effect of draining-proof and air-tightness.

Abstract: A heat pipe includes a hollow body having a receiving space and an open end, a cover member covering the open end, and having a filling hole in fluid communication with the receiving space and extending through an outer side of the cover member, an elastic sealing member fitted within the filling hole, and a heat transfer fluid disposed in the receiving space. The elastic sealing member is pierceable to provide a passage for injection of the heat transfer fluid through the elastic sealing member, and is contractible to seal the passage.

Abstract: An improved sealing cap in particular for a collector tube in an air-conditioning unit for vehicles suitable for being axially inserted in a cylindrical portion (11) at an end of said collector tube comprises at least two moulded elements able to be coupled (12, 13, 22), a first (12) element being equipped with a portion (16) with the same diameter as the collector and at least one portion with a smaller diameter (17, 21) suitable for stably receiving a second element (13, 22) to define at least one seat (15, 150) for a sealing ring (14), which is realised with the coupling of the at least two elements. The portion with a smaller diameter (17, 21) defines a base of the seat (15, 150), a side surface (19, 28) of the second element (13, 22) and a side surface (20, 29) of the portion with the same diameter as the collector (16) respectively defining sides of said seat (15, 150).

Abstract: A flexible hose with connect flange and a method for obtaining such a hose. The flexible hose (1) whereof the elastomer wall (1a) is reinforced by at least a main carcass (2) comprises flexible cables, including at least at one of its ends an annular flange (3), provided with longitudinal perforations, whereto is fixed at least the main carcass, the flange having an external diameter not greater than the external diameter of the hose wall proximate to the flange. The flange comprises perforations (34a) emerging on one or more indentation(s) (12) provided on the outer surface (9) of the hose wall and whereof the dimensions enable to house therein at least linking elements (15) externally accessible for abutting connection of pipes without interposition of an intermediate component between their respective flanges.

Abstract: In a metal bellows accumulator, a metallic bellows unit is disposed within a pressure space defined in a main shell, and one end of the metallic bellows unit is fixedly secured to one end wall of the main shell. The metallic bellows unit sections the pressure space into an outer chamber serving as a gas chamber in which a pressurized gas is enclosed, and an inner chamber serving as a liquid chamber communicating with a liquid port formed in the end wall of the main shell. A stopper (auxiliary shell) for limiting collapsing movement of the metallic bellows unit is disposed within the liquid chamber and has a communication passage hole. The liquid port always communicates with a liquid chamber to which an inner circumferential surface of a bellows portion of the metallic bellows unit is exposed via the communication passage hole.

Abstract: A hydroaccumulator, especially a membrane accumulator, has an accumulator housing with two housing parts and a separating element in the housing. The separating element can be a separating membrane dividing the accumulator housing into a gas chamber and a fluid chamber. The gas chamber is connected to carry gas to and from gas refiller through a connection. The gas refiller is formed from an additional housing part connected to the accumulator housing to form a unit. The connection is at least one connecting opening in the accumulator housing connecting the interior of the additional housing part to the gas chamber. Additional gas accumulator volume is provided without otherwise conventional pipework to save money and installation space and avoid conventional leaks which occur in the area of the pipework.

Abstract: A bellows-type hydraulic accumulator includes a shell, a bellows unit, and a stay in order to accumulate pressurized liquid within a liquid chamber, divided into a fixed-volume liquid chamber and a variable-volume liquid chamber communicating with the fixed-volume liquid chamber via a communication port formed in the stay. A pipe is inserted into a liquid inlet/outlet port communicating with the fixed-volume liquid chamber, to thereby form an inflow passage inside the pipe and an outflow passage outside the pipe. A tip end of the pipe is located within the communication port of the stay with a predetermined radial clearance formed between the tip end and a wall surface of the communication port, to thereby enable pressurized liquid to be supplied to the variable-volume liquid chamber from the tip end of the pipe and to be discharged from the variable-volume liquid chamber to the fixed-volume liquid chamber via the radial clearance.

Abstract: The present invention is an improved method for installing a liner to repair a pipeline. The method involves placing a flexible lining hose that is coated with a thermosetting resin in the pipeline. A thermosetting resin is also applied to the interior walls of the pipeline. A calibration hose is introduced into the lining hose and pressurized fluid is injected therein. The fluid presses the lining hose against the interior surface of the pipeline and cures the first and second thermosetting resins. The curing of the resins bonds the lining hose to the pipeline to form a rigid monolithic composite structure having high mechanical strength.

Abstract: A spray extension device for a spray can includes at least a pair of telescopable extension tubes fitted to and in fluid communication with the valve stem of a spray can. Advantageously, the extension tubes are fitted to a closure cap which, in turn, is fitted to the valve stem, and, thereby, in fluid communication with the interior of the can. Depressing of the closure cap causes the valve stem to issue fluid therethrough, into the tubes.

Abstract: A micro channel unit having a shape designed to reduce a pressure drop when fluid passes through a connecting channel portion is provided. The micro channel unit includes a micro channel with a width of micrometer dimensions through which liquid flows. The micro channel includes a plurality of straight channel portions and connecting channel portions that connect each pair of adjacent straight channel portions. The connecting channel portions are wider than the straight channel portions connected by the connecting channel portions. The use of the micro channel unit can reduce the pressure drop when fluid passes through the connecting channel portions, thereby reducing the amount of power required to drive the fluid flow and further enabling miniaturization of microfluidic devices such as pumps and peripheral devices.

Abstract: A hydraulic accumulator, especially a piston accumulator, includes an accumulator housing (10) with at least one gas chamber (12) and a fluid chamber (14). These chambers are separated from each other by a separating element (16). At least one of these chambers (12, 14) can be filled with a pressure medium or at least partially emptied through at least one valve control unit (26) which has switching valves (28, 30). One switching valve (28) is accommodated in a corresponding valve location (29), and can be moved in the direction of movement of the separating element (16) from an opening position into closing position and vice-versa. Expensive line network between the hydraulic accumulator and the valve control unit is avoided. Sealing or leakage problems, such as are common in a line network, never occur. The valve control unit (26) is accommodated in a valve block (24) which is independent from the housing (10).

Abstract: Disclosed herein is a hose for introduction and distribution of inflator gas which is characterized in that the hose is placed in an air bag apparatus for side collision and distributes the inflator gas upon operation of the air bag, that outside surface and/or inside surface of the hose are/is coated with rubber or synthetic resin and that the hose has a distribution hole.

Abstract: What is new in the art to which my invention pertains is that it allows for a repair or restoration of a pressure retaining item that has local material degradation to an acceptable state of condition for continued operation without the need to cut out the degraded section of material or breach the pressure boundary of a pressure retaining item. Common methods of repair include removal of degraded or affected material section and replacement with a new section of equivalent material by joining the new material to an existing item at a location of adequate thickness using full or complete penetration welds. This type of repair may be referred to in the industry as a “flush patch repair”. An additional type of repair where a section of material degradation may be localized is a “weld build-up repair’ wherein weld metal is deposited onto the existing area of affected material to return the material to its original thickness.

Abstract: A spoolable composite tube capable of being spooled onto a reel for storage and for use in oil field applications. The spoolable tube exhibits unique anistropic characteristics that provide improved burst and collapse pressures, increased tensile strength, compression strength, and load carrying capacity, while still remaining sufficiently bendable to be spooled onto a reel in an open bore configuration. The spoolable composite tube can include an inner liner, an interface layer, fiber composite layers, a pressure barrier layer, and an outer protective layer. The fiber composite layers can have a unique triaxial braid structure.

Abstract: A hydropneumatic pressure reservoir (1) forms a housing from at least two housing shells (3, 5) connected together. At least the end region of the one housing shell (5) includes an outwardly-extending, funnel-like guide surface between its free end and a sealing element for bringing together the two housing shells (3, 5). At least on elastic sealing element (41) is provided on at least one retaining surface for generation of a tensioning force on the boundary region (21) of the membrane (13). A simplified construction with improved sealing in the critical connection of the pressure reservoir is achieved.

Abstract: A fluid line assembly is disclosed that includes an outer fluid line and an inner fluid line disposed substantially within the outer fluid line. The inner and outer fluid lines each include a slip joint. In an embodiment of the invention, at least one of the slip joints includes a reservoir in communication with the interior of the corresponding fluid line. Among other things, the reservoir is suitable for receiving fluid from the corresponding fluid line as the fluid line assembly is contracted and expelling fluid into the corresponding fluid line as the fluid line assembly is extended. In another embodiment of the invention, the inner and outer fluid lines include a ball joint assembly.

Abstract: A fluid conduit wall enclosing a hollow interior for the flow of fluid includes an outer surface provided with a low emissivity coating having a coating emissivity of less than 0.2 and a thickness at least sufficient to provide the coating emissivity. One embodiment provides a fluid conduit with multiple spaced-apart walls. An outer surface of an inner wall of a first member and an inner surface of an outer wall of a second member define a gap therebetween. At least one of such surfaces includes the low emissivity coating. A method for providing such coating deposits the coating, for example by reactive vaporization, concurrently on both surfaces from within the gap after assembly of the members.

Abstract: A nebulizer assembly, and more particularly, for nebulizing liquids into aerosols, includes an oscillation driver connected with an aerosol excitation device at one end thereof, a liquid delivery device adjacently disposed to the aerosol excitation device for supplying an impingement baffle provided in the aerosol excitation device with micro liquid bodies having tension liquid membranes, so that energy is completely acted upon the micro liquid membranes for excitation into aerosol particles, thereby achieving aimed excitation without causing unnecessary loads.

Abstract: A sprinkler discharges a column of water downwardly onto a deflector that has a plurality of peripheral tines with a respective non-radial tapered notch separating each adjacent pair of tines. Opposed cutouts with tabs in the central portion of the deflector combine with the notches and with depressed peripheral tabs to produce a predetermined spray pattern.