Spaced Patents (Class 138/148)
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Patent number: 4694865Abstract: The invention relates to a conduit for the transport of liquid and/or gaseous media or suspensions, comprising at least one media pipe and at least one envelope. The media pipe is arranged so as to be axially displaceable inside the envelope or envelopes on sliding parts under formation of an air gap separating the envelope from the media pipe. The sliding parts are held at the joints of the individual elements of the envelope. They preferably extend by a radially outer segment between the elements of the envelope and form a support for the media pipe together with a radially inner segment. A single annular sliding part is preferably inserted in each joint of the elements of the envelope. In the case of an annular sliding part without a segment extending between the elements of the envelope, the part is conveniently pushed outward by self-tensioning due to the elasticity of its shape.Type: GrantFiled: June 25, 1985Date of Patent: September 22, 1987Inventor: Otto Tauschmann
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Patent number: 4693279Abstract: A device for the detachable fixing of an internal structure to a circular wall of a pipe or container.The device comprises one or more deformable annular members having blocks regularly distributed over its periphery. The application of radial forces between the blocks reduces the diameter level therewith and makes it possible to fit and remove the device.Application more particularly to the fixing of internal structures in the primary circuit of pressurized water reactors.Type: GrantFiled: February 5, 1986Date of Patent: September 15, 1987Assignee: Commissariat a l'Energie AtomiqueInventor: Gilles Aubert
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Patent number: 4691741Abstract: The shroud is formed from sheet material and is cylindrical in shape. A plurality of spacers are associated with the sheet material. These spacers are designed to engage the outer surface of a duct to hold the cylindrical sheet material in radially outwardly-spaced relationship to the duct, defining thereby an insulating air gap between the outer surface of the duct and the shroud. The angular space between the spacers serves as gas channels to permit gas to flow between the shroud and the outer surface of the duct, along the length of the duct. The shroud has a straight axially-extending slot along its entire length for easy removal from a duct. An axially-extending edge receiving pocket is formed on the shroud adjacent to the slot for receiving the adjacent longitudinally extending edge of the slot to hold the shroud in a cylindrical shape and to provide a gas tight closure for the slot.Type: GrantFiled: July 12, 1985Date of Patent: September 8, 1987Assignee: General Connectors CorporationInventors: Steven N. Affa, Ira R. Newman, Robert S. Allison
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Patent number: 4674542Abstract: The double-wall welded tube has two portions of the tube, in the region of which the weld (10) is located, which are each defined by the outer surface of a fold (6, 7) formed by the material constituting, in this region, the double wall of the tube. In this way, the regin in which the weld is effected is perfectly homogeneous and the weld can therefore be of very high quality.Type: GrantFiled: March 18, 1985Date of Patent: June 23, 1987Assignee: Ugine Gueugnon S.A.Inventor: Raymond Baillet
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Patent number: 4669757Abstract: A tubular conduit assembly for conveying a pressurized fluid is described which includes a plastic inner tube for conveying the pressurized fluid, and a flexible metal outer tube disposed coaxially around the inner tube. The outer tube is constructed from a plurality of interlocking, generally channel-shaped members. In one form of the present invention, the outer tube is comprised of two alternately facing, U-shaped metal strips which are helically wound together and slidably engaged. A predetermined radial separation is provided between the exterior diameter of the inner tube and the interior diameter of the outer tube. This predetermined separation permits a limited amount of expansion for the inner tube while resisting a blowout at normally high pressures and temperatures. While the conduit assembly is initially flexible to facilitate routing, one or more portions of the conduit assembly may be made less flexible, semi-rigid or rigid in order to retain a desired shape of the conduit assembly.Type: GrantFiled: August 5, 1982Date of Patent: June 2, 1987Inventor: Donald D. Bartholomew
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Patent number: 4659601Abstract: A size-adjustable construction element involves use of channel spacers to maintain spaced parallel relationship and positive physical contact between adjacent panel members. A preferred embodiment of the invention comprises multilayered mirror insulation having an adjustment section to permit use of a standard size component to fit nonstandard dimensions and further includes channel spacers that effectively reduce convection between adjacent layers, provide positive structural support, provide a bearing surface for ease of adjustment and maintain the parallel space relationship between adjacent sheets.Type: GrantFiled: March 12, 1984Date of Patent: April 21, 1987Assignee: The Babcock & Wilcox CompanyInventors: Patrick H. Elliott, James L. Funk
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Patent number: 4656713Abstract: A process and an apparatus for forming an air gap pipe are provided. Inner and outer pipes are bent or deformed into comparable configurations such that the inner pipe can be mounted within the outer pipe. The outer pipe then is split longitudinally by a preprogrammed cutting apparatus. The cutting of the outer pipe terminates just short of the complete longitudinal length of the pipe to facilitate rematching later in the process. The cutter includes a follower to trace the actual configuration of the pipe and thereby to offset differences from one pipe to the next. An array of clamps are provided to align the outer pipe halves relative to one another and to facilitate the reattachment.Type: GrantFiled: October 24, 1985Date of Patent: April 14, 1987Assignee: AP Industries, Inc.Inventors: Bruno A. Rosa, Jon W. Harwood, Walter G. Moring, III, Peter L. Resuggan
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Patent number: 4656712Abstract: A method is provided for manufacturing a heat shield for an exhaust system component. The exhaust system component preferably is of tubular nonlinear configuration. The heat shield is formed from a larger pipe having an internal diameter greater than the outer diameter of the exhaust system component. Appropriately dimensioned inwardly directed supports are formed in the larger pipe. The larger pipe then is bent into a nonlinear configuration substantially identical to the configuration of the exhaust system component. The outer pipe then is cut longitudinally in half along its entire length to define a unitary nonlinear heat shield which can be mounted to the exhaust system component. A portion of the remaining half of the larger pipe can be reattached to the heat shield to provide an air gap pipe along a portion of the length of the exhaust system component.Type: GrantFiled: June 9, 1986Date of Patent: April 14, 1987Assignee: AP Industries, Inc.Inventors: Jon Harwood, Michael Clegg, Bruno A. Rosa, Walter G. Moring
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Patent number: 4654094Abstract: The present invention relates to an improved cooling process for the manufacture of high-pressure reinforced hose. Hose to be treated is passed through a cooling chamber where it is contacted with a cryogenic fluid which totally flashes to a cold gas upon contact with the hose. A portion of the cold gas is passively recycled to provide further cooling. One end of the cooling chamber is sealed to prevent moisture build-up and freezing inside the chamber.Type: GrantFiled: August 30, 1985Date of Patent: March 31, 1987Assignee: Air Products and Chemicals, Inc.Inventor: Richard D. Ritter
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Patent number: 4653541Abstract: A dual wall safety tube assembly comprises an inner, seamless, stainless steel tube of extended length and an outer, welded stainless steel tube of the same length, in which the inner tube is connected as a process line without any junctions except for end couplings and the outer tube is similarly connected as a monitoring or inerting conduit. The assembly may include further options of electric heating cable, plastic jacketing and thermal insulation of fiberglass or similar material.Type: GrantFiled: June 26, 1985Date of Patent: March 31, 1987Assignee: Parker Hannifin CorporationInventors: Richard M. Oehlschlaeger, John R. Greco
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Patent number: 4654107Abstract: The present invention relates to an improved cooling chamber for the manufacture of high-pressure reinforced hose. Hose to be treated is passed through a tubular passageway in the cooling chamber where it is contacted with a cryogenic fluid. A portion of the cryogenic fluid is passively recycled via a recycle loop to provide further cooling within the tubular passageway. An end seal is attached to one end of the cooling chamber to prevent moisture build-up and freezing inside the chamber.Type: GrantFiled: August 30, 1985Date of Patent: March 31, 1987Assignee: Air Products and Chemicals, Inc.Inventor: Richard D. Ritter
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Patent number: 4652020Abstract: A pipework junction (10, 11) has internal insulation to limit the effect of thermal shock in the form of a two part (14, 15) internal sleeve in which the parts of the sleeve are joined (34) and are, for the most part of their external surfaces, spaced from the junction by a small clearance (20) adequate to ensure that they do not lock to the junction when subjected to thermal shock. Piston rings (62) may be provided to restrain flow along the small clearance and the sleeve may be stabilized in the junction by having an expanded part (63) engaging a recess (64), which also serves to restrain flow along the small clearance.Type: GrantFiled: March 11, 1985Date of Patent: March 24, 1987Assignee: National Nuclear Corporation LimitedInventor: John E. Gilroy
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Patent number: 4619292Abstract: An air gap pipe and a method for forming the same are provided. The air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples in the outer pipe. The outer pipe is placed in a condition for receiving the inner pipe by longitudinally cutting the outer pipe in half with a pre-programmed plasma arc or laser cutting apparatus. The two halves of the outer pipe are secured together to provide vents, if necessary, for selective dissipation of heat.Type: GrantFiled: January 30, 1985Date of Patent: October 28, 1986Assignee: APX Group, Inc.Inventor: Jon W. Harwood
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Patent number: 4615359Abstract: The shroud is formed from sheet material and is cylindrical in shape. A plurality of spacers are associated with the sheet material. These spacers are designed to engage the outer surface of a duct to hold the cylindrical sheet material in radially outwardly spaced relationship to the duct, defining thereby an insulating air gap between the outer surface of the duct and the shroud. The angular space between the spacers serves as gas channels to permit gas to flow between the shroud and the outer surface of the duct, along the length of the duct. The shroud has a straight axially extending slot along its entire length for easy removal from a duct. An axially extending edge receiving pocket is formed on the shroud adjacent the slot for receiving the adjacent longitudinally extending edge of the slot to hold the shroud in a cylindrical shape and to provide a gas-tight closure for the slot.Type: GrantFiled: June 1, 1983Date of Patent: October 7, 1986Inventors: Stephen N. Affa, Robert S. Allison, Ira R. Newman
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Patent number: 4607665Abstract: A mechanical spacer for holding an inner pipe fixed in place within an encasing outer pipe in a multiple wall pipe assembly. The spacer functions in place of a bracket in a double wall-chimney pipe assembly. The unitary spacer requires no external hardware nor requires welding, screwing, riveting or the like step in the manufacturing or assembly of the pipe assembly.Type: GrantFiled: May 20, 1985Date of Patent: August 26, 1986Assignee: Marco Manufacturing, Inc.Inventor: Samuel B. Williams
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Patent number: 4590652Abstract: An air gap pipe and a method for forming the same are provided. The air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples in the outer pipe. The outer pipe is placed in a condition for receiving the inner pipe by longitudinally cutting the outer pipe in half with a pre-programmed plasma arc or laser cutting apparatus. The two halves of the outer pipe are secured together to provide vents, if necessary, for selective dissipation of heat.Type: GrantFiled: November 14, 1984Date of Patent: May 27, 1986Assignee: APX Group Inc.Inventor: Jon W. Harwood
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Patent number: 4590116Abstract: The invention relates to a heat insulating piece comprising a transporting duct of a storage enclosure for liquids or gases, and a heat insulating covering.At least one layer of heat insulating material is deposited on the outer surface of the wall of the duct or of the enclosure, and an outer wall is disposed around said layer and is maintained with stiffeners which also reinforce the structure of the piece.Type: GrantFiled: February 6, 1984Date of Patent: May 20, 1986Assignee: BronzaviaInventor: Claude Joly
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Patent number: 4585059Abstract: A heat transfer tube assembly comprising a pair of fluid circulation tubes disposed co-axially one within the other, the inner tube being held substantially concentric within the outer tube by a plurality of pairs of diametrally opposed depressions or dimples formed in the peripheral surface of the outer tube at regular intervals. Each depression or dimple projects inwardly such as to engage and indent the peripheral surface of the inner tube and to cause a corresponding portion of the inner tube to bulge inwardly during forming of the dimples in the periphery of the outer tube by forming punches or, preferably, by two pairs of diametrally opposed rolls, each provided with an appropriate dome-shaped protuberance on its peripheral surface for roll forming the dimples as a result of longitudinally feeding the outer tube, with the inner tube disposed within the outer tube, between the rotating rolls.Type: GrantFiled: September 20, 1982Date of Patent: April 29, 1986Assignee: H & H Tube & Mfg. Co.Inventor: Marlow Lee
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Patent number: 4573400Abstract: An insulated chimney pipe for use with boilers or open fires has a plurality of sections comprising an outer wall of galvanized steel connected by two end caps to an inner wall formed of a refractory material comprising alumino-silicate fibres bonded together with an inorganic colloidal bonding agent.Type: GrantFiled: July 19, 1983Date of Patent: March 4, 1986Assignees: Morganite Ceramic Fibres Limited, Insulated Chimneys (Trim) LimitedInventor: Martin Foy
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Patent number: 4571801Abstract: In a compact thermal flowmeter unit of the type wherein a portion of the fluid in a main flow path is shunted through a laminar-flow sensor passageway, that section of the main flow path which the sensor bypasses is occupied by an appropriate range-governing cartridge selected from among a family of externally-similar tubular flow-regulating cartridges each having a different flow capacity as determined by the totals of cross-sectional areas of its plurality of linear flow channels each exhibiting an effective ratio of length to cross-section which promotes laminar flow but is nevertheless advantageously relatively short.Type: GrantFiled: November 30, 1984Date of Patent: February 25, 1986Assignee: MKS Instruments, Inc.Inventor: James H. Ewing
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Patent number: 4570679Abstract: Two corrugated metal tubes in a low temperature conduit system are spaced apart by a ceramic spacer made of braided ceramic threads, each thread being composed of stranded or twisted together ceramic filaments, the space between adjacent loops of this spacer is filled with super-insulation being comprised of multiple metal foils spaced apart by a ceramic webbing, mesh, plaits, sheets or the like.Type: GrantFiled: September 26, 1984Date of Patent: February 18, 1986Assignee: Kabelmetal Electro GmbHInventor: Klaus Schippl
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Patent number: 4570678Abstract: The conduit system is comprised of a corrugated inner and a corrugated outer tube with a helical spacer in between, the spacer being comprised of intertwined, stranded and/or, braided ceramic fibers.Type: GrantFiled: April 23, 1984Date of Patent: February 18, 1986Assignee: Kabelmetal Electro GmbHInventors: Gerhard Ziemek, Klausdieter Schippl
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Patent number: 4538337Abstract: A method of prestressing a tubular apparatus having coaxial inner and outer metal tubes which are connected to each other at axially spaced locations. After the inner and outer tubes are connected to each other so that the tubular apparatus may be heat-treated or otherwise processed before it is prestressed, the diameter of at least a portion of the inner tube is increased so that it is shortened to thereby establish a prestressed condition between the inner and outer tubes with the inner tube under tension and the outer tube under compression.Type: GrantFiled: June 27, 1984Date of Patent: September 3, 1985Assignee: The Babcock & Wilcox CompanyInventors: Richard L. Holbrook, Dean L. Mayer
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Patent number: 4534923Abstract: Double walled thermoplastic tubes, with corrugated outer walls and smooth inner wall are formed with integral bell sections spaced along the tube. The outer, corrugated wall is formed with a bell section. One of the walls is pierced between the ends of the bell section to allow the escape of air, and the inner wall is pressed outwards into engagement with the bell section of the outer wall.Type: GrantFiled: November 3, 1983Date of Patent: August 13, 1985Inventor: Manfred A. A. Lupke
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Patent number: 4531551Abstract: An improved double wall hose and the method of forming the hose characterized by the hose comprising a helically wound member having a center part with extensions extending in opposite directions so that when adjacent turns of the member are joined together, a plurality of cavities are formed with one of the cavities containing a helical reinforcing member. Preferably, the reinforcement is of a material harder than the material forming the rest of the member and the turns of the member when joined together provide smooth continuous inner and outer wall surfaces for the hose.Type: GrantFiled: December 9, 1983Date of Patent: July 30, 1985Assignee: Siemens AktiengesellschaftInventors: Leo Eichelberger, Hans-Joachim Ciszewski
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Patent number: 4522234Abstract: Pipe comprising intermediate tube radially spaced between outer and inner tubes, a support adjacent one end of inner tube fixedly mounting intermediate tube to outer and inner tubes and a shock mount adjacent the other end of intermediate tube fixedly attached to the intermediate tube positioning intermediate tube between inner and outer tubes and including a resilient part providing for limited relative axial and rotational movement between intermediate tube and outer tube at said second support, said resilient part having lower modulus of elasticity than said first support and being elastomeric to damp out relative rotational vibrations of said tubes through its internal friction, threaded portions on ends of outer tube for making mechanical connection with correlative threaded portions on ends of outer tube of similar pipe, telescopic portions on ends of intermediate tube for making fluid conducting connection with correlative portions on ends of intermediate tube of similar pipe, pin and socket on ends ofType: GrantFiled: December 21, 1981Date of Patent: June 11, 1985Assignee: Smith International Inc.Inventors: Jackson M. Kellner, William R. Garrett
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Patent number: 4509447Abstract: A double-wall structural vessel includes an inner tubular liner and an outer tubular shell surrounding the liner in spaced relation, both the liner and the shell comprising helically curved strips of material, and a continuous and helically curved spacer/stiffener therebetween. The liner and shell are relatively shifted axially such that the shell edges are out of alignment with the liner edges, and the spacer spans contiguous edges at successive turns of the liner as well as at successive turns of the shell, and is secured to the strips as well as to the liner edges and to the shell edges.Type: GrantFiled: June 28, 1983Date of Patent: April 9, 1985Assignee: Universal Spiralweld Enterprises, Inc.Inventor: Richard H. Smith, Sr.
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Patent number: 4508182Abstract: A method of and apparatus for controlling the azimuthal drift of a drill bit in an inclined well bore is described. The method comprises prestressing a drill collar member in torsion to adjust the angle in the horizontal plant that the drill bit makes with the longitudinal axis of the well bore when the drill collar is subjected to the gravitational, axial, and torsional forces of the drilling operation. The drill collar includes an inner tubular member and an outer tubular member. The two are held against relative rotation at one end. The desired torque is placed in the members by rotating the other ends of the members relative to each other in the desired direction. A splined member engages grooves in the inner and outer surfaces of the members to hold the members in their prestressed state.Type: GrantFiled: July 20, 1983Date of Patent: April 2, 1985Assignee: Dailey Petroleum Services Corp.Inventor: Edward O. Anders
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Patent number: 4495970Abstract: A synthetic resin pipe which includes two identical complementary, extruded semi-cylinders joined by electromagnetic bonding along abutting longitudinal edges to form a smooth walled cylindrical pipe. In one embodiment of the invention, the smooth walled pipe forms an internal sleeve or liner within an external corrugated pipe having contiguous circumferential corrugations over its length, and having the troughs of the corrugations bonded to the outer surface of the internal sleeve.In the method for forming the pipe, two identical flat plastic sheets are extruded, then vacuumed formed into semi-cylinders each having radially outwardly projecting longitudinal flanges extending from opposite side edges thereof. A paste or dispersion containing ferro-magnetic particles is then applied to the flanges on the sides thereof adjacent the concavity of the respective semi-cylinder. The semi-cylinders are next arranged in registry to form a cylinder with the flanges abutting.Type: GrantFiled: April 18, 1983Date of Patent: January 29, 1985Assignee: Thyssen-Bornemisza Inc.Inventors: Harold T. Pate, William R. Laney, Donald H. Shell
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Patent number: 4475341Abstract: An exhaust manifold device for an engine including at least one pair of cylinders arranged substantially in the form of a V and a turbosupercharger driven with exhaust gases of the cylinders to supply compressed air thereto. The exhaust manifold device comprises a pair of exhaust gas inlet members for receiving the exhaust gases, the inlet members being connected integrally with either of the cylinders, a pair of communication members for conducting the exhaust gases, the communication members having the longitudinal lengths thereof variable and either ends thereof connected with either of the inlet members, and an exhaust gas collecting member for collecting the exhaust gases to supply same to the turbosupercharger, the collecting member being connected with the respective other ends of the communication members.In hot temperature operation, the thermal expansion of the exhaust manifold device can be effectively absorbed, thus eliminating undue stresses.Type: GrantFiled: May 19, 1982Date of Patent: October 9, 1984Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kazuo Inoue, Kentaro Kato
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Patent number: 4470188Abstract: A method of prestressing a tubular apparatus having coaxial inner and outer tubes which are connected to each other at axially spaced locations comprises, after the inner and outer walls are connected to each other and the tube is heat-treated or otherwise processed, reducing the diameter of the outer wall so that the outer wall is elongated. The elongation of the outer wall establishes a prestressed condition between the inner and outer walls, with the inner wall under tension and the outer wall under compression. The reduction in diameter of the outer wall can be accomplished by using a roll extrusion machine, a tube reducer or a draw bench.Type: GrantFiled: August 31, 1982Date of Patent: September 11, 1984Assignee: The Babcock & Wilcox CompanyInventors: Richard L. Holbrook, Dean L. Mayer
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Patent number: 4461743Abstract: An apparatus for injecting a mixture of pure oxygen or oxygen-enriched air (at least 25 percent oxygen) and purge water into a wet oxidation reactor operating at elevated temperature and pressure. An annular space between the oxygen carrying pipe and a second, larger pipe is filled with heat transfer resisting material, either maintained static or passed through the annular space to remove heat therefrom. The temperature of the oxygen and purge water is maintained at less than 250.degree. F., preferably less than 150.degree. F. to minimize evaporation of the purge water. Thus, backflow of organic matter into the oxygen pipe is prevented; plugging of the oxygen pipe by salts is also prevented.Type: GrantFiled: February 8, 1982Date of Patent: July 24, 1984Assignee: Sterling Drug Inc.Inventors: Ajit K. Chowdhury, Gerald L. Bauer, Richard W. Lehmann
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Patent number: 4461323Abstract: A bent honeycomb pipe includes an outer pipe section bent at a predetermined curvature, a bent central pipe section coaxial with the outer pipe section and a bent honeycomb-shaped section interposed between the outer and central pipe-sections, all three sections being simultaneously coextruded to form a single-piece construction.Type: GrantFiled: February 6, 1979Date of Patent: July 24, 1984Assignee: NGK Spark Plug Co., Ltd.Inventors: Akira Morikawa, Yoshinori Narita
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Patent number: 4456058Abstract: The present invention relates to a heat exchanger tube support for supporting a plurality of heat exchanger tubes in a conduit of a heat exchanger. The heat exchanger tube support includes three identical elements each having a flattened W-shaped configuration defined by a central projection and two diverging leg sections. A channel is defined in the area between each leg section and the projection. The elements are secured together with a leg section of each element being welded to a leg section of each adjacent element and with the projections extending radially outward. The elements enclose an interior area through which a central heat exchanger tube passes. Six outer heat exchage tubes are supported in a radial array on the heat exchanger tube support within each channel. The leg sections of each element extend to the inside wall of the conduit to space the heat exchanger tubes from the inside wall.Type: GrantFiled: November 30, 1982Date of Patent: June 26, 1984Assignee: Brown Fintube CompanyInventor: John R. Powell
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Patent number: 4440195Abstract: Tube of thermoplastic material, comprising longitudinal channels of rounded cross section and having such wall stresses that, after axially cutting the tube, the edge parts beside the cut edges overlap each other for less than 5% of the outer circumference of the tube.Type: GrantFiled: December 20, 1982Date of Patent: April 3, 1984Assignee: Wavin B.V.Inventor: Jan P. van Dongeren
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Patent number: 4440337Abstract: A method of producing similar deep-drawn parts for double-walled structural parts having uniformly spaced walls and edge welding. During every deep-drawing procedure, a respective planar outer plate, which is placed upon the lower part of the tool, as is a filler plate, as well as a preformed or preshaped inner plate, which is placed over the tool punch, are shaped in common, whereby the preformed inner plate and the outer plate receive their final form or shape, and the filler plate is deformed into a preshaped inner plate for a subsequent deep-drawing procedure. The tool for carrying out this method is characterized in that the smallest spacing between the tool punch and the lower part of the tool corresponds to the entire thickness of the two inner plates and one outer plate.Type: GrantFiled: October 8, 1981Date of Patent: April 3, 1984Assignee: Klockner-Humboldt-Deutz AktiengesellschaftInventor: Rolf Eckert
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Patent number: 4435460Abstract: The formation of articles using an elongated strip which has on it a series of longitudinally positioned upstanding ribs to form between them a series of longitudinally positioned channels and including connectors on the strip spaced apart transversely on the strip whereby the strip can be wound helically to form an elongated object with the connectors interengated along a helical line to lock the strip in object form.Type: GrantFiled: June 18, 1980Date of Patent: March 6, 1984Assignee: Rib Loc (Hong Kong) Ltd.Inventor: Julian M. Menzel
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Patent number: 4432485Abstract: A corrutherm expansion fixture is provided for supporting a part in a desired configuration during a brazing operation. The fixture includes a discontinuous corrugated ring formed from material which is expansible when subjected to high temperature. The fixture also includes a continuous inner ring and a discontinuous outer ring between which the corrugated ring is disposed. The inner ring resists inward movement of the corrugated ring when expansion force is exerted by the corrugated ring. The outer ring supports the part to be brazed and transmits the expansion force to the part to retain it in the desired configuration as the force is exerted on the outer ring by the corrugated ring.Type: GrantFiled: September 21, 1981Date of Patent: February 21, 1984Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: William E. Smith
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Patent number: 4432395Abstract: The invention relates to a pipe part with a socket being provided with longitudinally extending channels. The channels extend into the wall of the socket. The socket engages a J-shaped retaining ring which forms with the socket a recess for retaining the flange of a seal that includes a sealing sleeve. The retaining ring adheres to the outer side of the socket by an adhesive.Type: GrantFiled: April 21, 1982Date of Patent: February 21, 1984Assignee: Wavin B.V.Inventors: Joannes H. Beune, Roelof H. Marissen
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Patent number: 4431469Abstract: An electrical connection insulator comprising an outer tube formed from a mono-layered film of a non-adhesive, heat stable, dielectric, synthetic, polymeric resin enclosing an inner tube formed from a mono-layered film of a non-adhesive, heat shrinkable, dielectric, synthetic, polymeric resin. The outer surface of the inner tube is attached to a selected minor portion of the inner surface of the outer tube by an adhesive strip spirally wound about the body of the inner tube. An electrical connection is covered with the insulator by disposing it within the inner tube, heat-shrinking the inner tube about the connection, and then sealing the outer tube about the heat-shrunk inner tube under heat and pressure.Type: GrantFiled: September 28, 1982Date of Patent: February 14, 1984Assignee: Niemand Bros.Inventor: Rocco Falcomato
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Patent number: 4429654Abstract: A structural vessel includes helically curved inner and outer spaced strips of material each having a plurality of helical turns, with contiguous edges of each two successive turns of the inner and outer strips being seamed together, and a helically curved structural beam disposed between the strips and secured thereto along their turns. A floatable work housing is provided for vessel fabrication, the housing having a sealed opening through which the completed portion of the vessel progressively extends and is floated on a body of water to avoid a need for external supports and bearings.Type: GrantFiled: July 10, 1981Date of Patent: February 7, 1984Inventor: Richard H. Smith, Sr.
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Patent number: 4428591Abstract: A plastic pipe comprises an inner wall and an outer wall, being integral with longitudinal partitions betweem them and bounding longitudinally extending channels and a circumferential, helically or non-helically extending groove, which groove has been formed by closing the channels by pressing channel wall parts onto each other. A retaining ring may be snapped into an external groove.Type: GrantFiled: May 17, 1982Date of Patent: January 31, 1984Assignee: Wavin B.V.Inventors: Roelof H. Marissen, Joannes H. Beune
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Patent number: 4417603Abstract: A fluid-conveying, flexible, lagged pipe for building up in particular a liquefied natural gas carrying pipe-line connecting an off-shore platform for working submarine oil fields or like underwater pools to a tanker ship and comprising an inner tubular duct including an inner helical metal spring, an intermediate layer of yielding composite material and an outer helical metal spring like the inner spring but longitudinally offset by half a pitch of turns with respect to the latter so that the turns of said outer spring be nested between those, respectively, of said inner spring.Type: GrantFiled: February 2, 1981Date of Patent: November 29, 1983Assignee: TechnigazInventor: Gilles Argy
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Patent number: 4410013Abstract: A steel tubing and more particularly a composite dual tubing which can be suitably used for an exhaust pipe capable of effectively reducing the radiated noise from the exhaust pipe of automobiles. A metallic dual tubing of the present invention comprises: lugs (20a); lugs (20a) and heat-resistant filler material (24); or, the spacer member (16) and the heat-resistant filler member (17).Type: GrantFiled: September 8, 1981Date of Patent: October 18, 1983Assignee: Nippon Steel CorporationInventors: Takesada Sasaki, Hiroshi Endo, Yoshimasa Zama, Masahiko Shiraishi, Yosinari Miura, Masayuki Yamaguchi
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Patent number: 4398567Abstract: A device for conducting a fluid in heat transfer relationship with another liquid comprises a conduit through which the fluid flows to be heated or cooled by the other fluid flowing around the conduit. An elongated, thread like element helically extends around the conduit with the windings spaced from each other, causing the fluid flowing around the conduit to undergo circulation for improved heat transfer relationship.Type: GrantFiled: October 15, 1980Date of Patent: August 16, 1983Assignee: Cinderella ABInventor: Thorleif Moll
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Patent number: 4390383Abstract: Plastic pipes comprising an inner and outer wall being interconnected by lengthwise extending connecting partitions, forming channels, the ends of the channels being each separately sealed by sealingly pressing the end walls of a channel to each other after these walls have been heated to a temperature surpassing the plasticizing temperature.Type: GrantFiled: March 25, 1981Date of Patent: June 28, 1983Assignee: Wavin B.V.Inventor: Jan P. van Dongeren
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Patent number: 4387915Abstract: An end pipe (18) of a tractor exhaust system is adapted for connection to an upright outlet pipe (12) from an exhaust muffler (10) so that when the end pipe (18) or muffler (10) is to be replaced, the pipes (18, 12) can easily be separated. This is achieved by ensuring that only very small areas of the pipes (18, 12) contact each other.The end pipe (18) has an insert (20) therein which has a lower converging frusto-conical portion (24) which acts as a seating for a converging end (14) of the outlet pipe (12). A ring (28) with a convex inner face (in cross-section) is also provided in the end pipe (18) near its lower end. This ring (28) contacts the outer surface of the outlet pipe (12). In this way, the outlet pipe (12) is maintained out of contact with the end pipe (18), except at the ring (28), and the converging end (14) of the outlet pipe.Type: GrantFiled: June 1, 1982Date of Patent: June 14, 1983Assignee: Deere & CompanyInventor: Henning Adickes
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Patent number: 4381801Abstract: The thermal insulation is formed of a plurality of sheet metal elements which are aligned in interfitting manner to define a multiplicity of cells for disposition within or about a pipe or tube. The elements rest against the wall of the tube in a resilient manner and the cells defined by the elements retard heat transfer to and from the pipe wall.Type: GrantFiled: August 17, 1979Date of Patent: May 3, 1983Assignee: Sulzer Brothers LimitedInventor: Alfred Brunner
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Patent number: 4364417Abstract: A pipe rupture restraint and shield diffuser assembly is installed on a pipe at a location where the pipe is subject or postulated to rupture and includes a cylindrical casing surrounding the pipe and having holes therethrough and a plurality of diffuser rings disposed in longitudinally spaced relation in an annular space between the casing and the pipe to form flow obstructions along the annular space whereby upon rupture of the pipe jet flow is diffused by flow past the diffuser rings and through the holes in the casing. The assembly can be attached directly around the pipe or can be independently supported.Type: GrantFiled: August 19, 1980Date of Patent: December 21, 1982Assignee: NPS Technologies, Inc.Inventor: Jan D. Lefter
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Patent number: 4344461Abstract: Pipe part with socket being provided with longitudinally extending channels, said channels also extending in the wall of the socket, said socket being provided with an annular groove, formed by sealingly pressing the walls of the channels onto each other, the socket further engaging a J-shaped retaining ring forming with the socket a recess for retaining the flange of a sealing means, comprising a sealing sleeve.Type: GrantFiled: December 28, 1979Date of Patent: August 17, 1982Assignee: Wavin B.V.Inventors: Joannes H. Beune, Roelof H. Marissen