With Spiral Seam Patents (Class 138/150)
  • Patent number: 8944114
    Abstract: Mortar-coated steel pipe comprise a steel cylinder having a mortar layer disposed therein, such mortar layer being free of any metallic reinforcement. An overcoat is disposed over the mortar layer and is formed from a material that is a dielectric and/or a barrier to moisture and oxygen entering the mortar layer, e.g., a polymeric material. The pipe may include a further concrete or mortar layer disposed over the overcoat, forming an outermost pipe surface. The outer layer can be cement, mortar, or other material. The mortar layer thickness is about 2 to 30 mm, the overcoat thickness is about 0.1 to 2 mm, and any outer layer thickness is about 1.2 to 4 cm. The pipe is made by compression coating method, where mortar layer and overcoat are applied simultaneously. When an outer layer is desired, it is preferably applied at the same time as the mortar layer and overcoat.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 3, 2015
    Assignee: Ameron International Corporation
    Inventors: Richard I. Mueller, Ralph S. Friedrich, Qizhong Sheng
  • Publication number: 20130291991
    Abstract: Pipe sections and methods for forming pipe sections are disclosed. A pipe section includes a hollow body, the hollow body having an inner surface and an outer surface, the inner surface defining an interior. The pipe section further includes a barrier layer surrounding the hollow body, the barrier layer having an inner surface and an outer surface. The barrier layer is formed from a polyarylene sulfide composition. The polyarylene sulfide composition includes a polyarylene sulfide and a crosslinked impact modifier. Such pipe sections exhibit high strength characteristics and flexibility as well as resistance to degradation, even in extreme temperature environments, while maintaining desirable processing characteristics.
    Type: Application
    Filed: April 15, 2013
    Publication date: November 7, 2013
    Inventors: Michael A. Ruby, David W. Eastep, Joseph J. Grenci, Christopher McGrady, Xinyu Zhao, Rong Luo
  • Publication number: 20110226374
    Abstract: In one aspect, the present disclosure relates to a tubular assembly with gap control. Embodiments disclosed herein relate to one or more embodiments of and methods for controlling gaps between helically wrapped layers in a pipe structure. A tubular assembly includes a fluid barrier, a first layer, and a second layer comprising a plurality of non-interlocking helical wraps and disposed on an outer surface of the first layer, in which the first layer is disposed between the fluid barrier and the second layer and configured to at least partially displace into a space created between adjacent non-interlocking helical wraps of the second layer.
    Type: Application
    Filed: March 17, 2010
    Publication date: September 22, 2011
    Applicant: DEEPFLEX INC.
    Inventors: Mark Kalman, Liang Yu
  • Publication number: 20110114215
    Abstract: Reinforced composite pipes and methods for making the same, generally employ at least one polymeric reinforcement phase, typically provided as an intermediate form. The intermediate form is typically applied over a core pipe, and may be consolidated. An optional jacket may be employed.
    Type: Application
    Filed: November 9, 2010
    Publication date: May 19, 2011
    Inventors: Mark B. Jeruzal, Martinus W. Aarts, Bernard A. Fehr, David G. McLeod
  • Patent number: 7870876
    Abstract: A hose having both excellent flexibility and shape retainability and advantageous in construction efficiency and cost efficiency. The hose comprises hard synthetic resin reinforcement material (2) spirally fed and having, on both sides of the top part (2D) thereof in the tube axial direction, receiving surfaces (2a) and (2b) positioned on the radial inner side toward the end part thereof and a soft synthetic resin hose body for covering the spirally fed reinforcement materials (2). The reinforcement materials (2) are spirally fed in the state of the top parts being positioned on the radial outer side thereof, a soft synthetic resin tape material (3) is fed to the fed reinforcement (2), and while covering parts (3A) projected in a generally arc shape to the center of the reinforcement materials (2) by melting the tape material or with an adhesive agent.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: January 18, 2011
    Assignee: Kanaflex Corporation Inc.
    Inventor: Shigeki Kanao
  • Patent number: 7766050
    Abstract: A method of forming a double film layered continuous conduit is disclosed. The method includes applying at least one film of ribbon spirally around a former where at least half of each turn of ribbon overlaps the next turn of the ribbon, such that the leading and trailing edges overlap. A bead of molten plastic is then applied between the overlap.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: August 3, 2010
    Assignee: Fisher & Paykel Healthcare Limited
    Inventor: Bhavna Patel
  • Patent number: 7726345
    Abstract: A flexible cable may include an elongated shaped strip helically wound around itself to form a generally tubular body having at least one interior passageway and at least one conductor at least partially disposed within the interior passageway. The elongated shaped strip may include a non-rectangular cross-sectional thickness having a central portion disposed between a first and a second end portion. The first and second end portions may extend generally outwardly from the central portion from generally opposite sides. At least a portion of the central portion may include a cross-sectional thickness TC which is less than a maximum cross-sectional thickness TM of the elongated shaped strip. The first and second end portions may include a first and a second cross-section thickness TS1, TS2, respectively, wherein at least one of the first and second cross-section thicknesses TS1, TS2 is greater than the cross-sectional thickness TC.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: June 1, 2010
    Inventor: Allan Stikeleather
  • Patent number: 7703480
    Abstract: A method of fabricating a composite tubular member includes providing a mandrel having a central longitudinal axis and wrapping a plurality of composite fiber layers around said mandrel wherein the longitudinal axis thereof is oriented at a first angle with respect to the longitudinal axis of said mandrel. The composite tubular member produced does not have any longitudinal seams and is thus considerably stronger and more durable than prior art composite tubes.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: April 27, 2010
    Assignee: Hillerich & Bradsby Co.
    Inventor: George W. Burger
  • Publication number: 20100012217
    Abstract: A metallic tube, including a first cylindrical member, which is formed from a flat metal strip, and a second cylindrical member, which is formed from a flat metal strip, wherein the first cylindrical member is embedded within the second cylindrical member.
    Type: Application
    Filed: August 1, 2006
    Publication date: January 21, 2010
    Inventor: Brian G. Herbst
  • Publication number: 20090107571
    Abstract: The present invention generally relates to flexible hose articles and methods. Some embodiments include hoses that can be reversibly bent and/or shaped. Furthermore, some embodiments can comprise methods for making and/or using such hose articles.
    Type: Application
    Filed: October 30, 2007
    Publication date: April 30, 2009
    Inventor: Bruno Ranieri Torchio
  • Publication number: 20080216911
    Abstract: Provided is an integrated spiral duct including: a curved duct; and straight connection ducts formed at both ends of the curved duct, wherein the curved duct is integrally formed with the straight connection ducts in spiral type without any joint. Therefore, since a metal strip is continuously wound to form a duct without any joint, it is possible to reduce the number of manufacturing processes to remarkably increase productivity, quality, and durability.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 11, 2008
    Inventor: Kyu-Seok Cha
  • Patent number: 7418980
    Abstract: The present invention relates to a vacuum cleaner hose manufactured by continuously spirally winding one row or two rows of band-shaped materials extruded with an electric wire inserted therein. The vacuum cleaner hose is formed by spirally winding and sticking a band-shaped material having protrusions connected to each other in a line. In one embodiment, the vacuum cleaner hose is formed from one row of the band-shaped material 2 having a plurality of the hollow protrusions 4 inserted with the electric wire 5 and at least one hollow protrusion 4a inserted with no electric wire 5 is formed into the hose 1. In another embodiment, the vacuum cleaner hose is formed from two rows of the band-shaped materials 2 in which the protrusions of only one row of the band-shaped materials 2 are inserted with the electric wire 5.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: September 2, 2008
    Inventor: Hyun Mi Lee
  • Patent number: 7412956
    Abstract: A cylinder barrel (1) for housing a piston comprises a sheet metal liner (2) and a reinforcing structure (10) located outside the sheet metal liner (2). The reinforcing structure (10) comprises a glass-fiber-reinforcing layer (12) and a carbon-fiber-reinforcing layer (13). The glass-fiber-reinforcing layer (12) comprises a plain cloth (20) made of glass fiber covering the sheet metal liner (2). The carbon-fiber-reinforcing layer (13) comprises a carbon fiber string (31) wound around the outer circumference of the glass-fiber-reinforcing layer (12) along a spiral path. According to the this construction, the reinforcing structure (10) has a high flexibility which is required for preventing cracks in the reinforcing structure (10) while maintaining a high rigidity of the entire cylinder barrel (1).
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: August 19, 2008
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Mitsunori Gotou, Tadashi Hiraga
  • Publication number: 20080128043
    Abstract: An insulated length of pipe includes a length of pipe and a flexible insulating material coating lengthwise surrounding the length of pipe. The flexible insulating coating comprises syntactic foam and a length conformable tape including a relatively narrow elastomeric extrusion spirally wrapped around the length of pipe and embedded within the syntactic foam where the elastomeric extrusion comprises a gelatinous filler. The majority of the insulating coating includes syntactic foam whose flexibility is increased by relatively narrow conformable tape wound spirally (e.g., helically) around the pipe.
    Type: Application
    Filed: January 22, 2007
    Publication date: June 5, 2008
    Inventor: Lou Watkins
  • Patent number: 6932119
    Abstract: An elongate flexible plastic tubing includes a helical support bead, and defines a central passage opening on opposite ends of the tubing. The tubing may also include one or more lumens extending helically in the support bead from end to end of the tubing. Also, the tubing may include one or more electrical conductors also extending helically from end to end of the tubing. Additionally, one or plural fiber optic conductors may extend helically from end to end of the tubing. The lumen(s), electrical conductors, and fiber optic conductors, are available for utilization to, for example: conduct electricity, carry out electrical resistance heating of fluid flow in the central passage, carry electrical signals, carry fluid, transmit fluidic signals, or to convey light, and/or optical signals, along a length of the tubing.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: August 23, 2005
    Inventor: Eric Carlson
  • Patent number: 6904941
    Abstract: A variable diameter cylinder made from a sheet having first and second edges that are opposite to each other and that slideably connect with each other to form a helical joint of a cylinder such that sliding the edges of the sheet along the joint varies a diameter and length of the cylinder. When marked with a scale, the cylinder acts as a measuring device that is both highly accurate and easy to use. A helical-based scale can be used alone, or a linear scale can be used in combination with a Vernier scale.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: June 14, 2005
    Inventor: David W. Howard
  • Patent number: 6889715
    Abstract: A flexible pipe in which a layer of wound tape extends adjacent a surface of a tubular member to limit or prevent molecular migration through the tubular member.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: May 10, 2005
    Assignee: Wellstream International Limited
    Inventors: Dana J. Fraser, Charles Basil Firth
  • Patent number: 6840286
    Abstract: A flexible tubular pipe comprising at least one metal profile spiralled in a helix about a longitudinal axis of the flexible pipe. The profile consists of a metal strip, each turn of which comprises two separate box sections which are obtained by bending the said strip so that the free edges of the strip are turned down between the two box sections and are in contact with a strip portion provided on an upraised bulge formed between the two box sections. The contact portion ties approximately along the neutral fiber of the profile. Each box section has a trapezoidal shape. Connectors above or below the profile connect windings. The edges of the connectors extend into the bulges. Profiling or extra elements are provided for the connectors.
    Type: Grant
    Filed: November 12, 2001
    Date of Patent: January 11, 2005
    Assignees: Coflexip, Institut Francais du Petrole
    Inventors: Philippe Espinasse, Patrice Joël Louis Jung
  • Patent number: 6827109
    Abstract: A flexible hose and a method for manufacturing the same includes a hose tube having a smooth exterior surface. The hose tube exterior surface has a fabric and cover laminated or wrapped thereon. The lead end of a single wire is helically wound about the hose tube on top of the cover. The wire in turn is at least partially encased by a rubber ridge preferably having a height greater than the thickness of the hose tube wall. The rubber ridge tapers in the direction of valleys formed between the ridges, and the resulting hose structure has improved flexibility by enabling the hose to flex at every valley, yet sufficient strength for heavy duty applications.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: December 7, 2004
    Assignee: Salem-Republic Rubber Company
    Inventor: Donald C. McCaughtry
  • Publication number: 20040216796
    Abstract: A flexible hose of the invention has a hose wall which is formed by laminating resin layers. The resin layer acting as a gas barrier is formed by spirally winding a gas barrier resin strip and thermally fusing or bonding axially adjoining edges of the strip to each other. The resin layers are thermally fused or bonded to one another to become one piece.
    Type: Application
    Filed: March 23, 2004
    Publication date: November 4, 2004
    Inventors: Kouki Fukui, Nobuo Shindo, Hiroshi Ikegami, Shigeto Tachibana
  • Publication number: 20040099324
    Abstract: A flexible pipe in which a layer of wound tape extends adjacent a surface of a tubular member to limit or prevent molecular migration through the tubular member.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Applicant: Wellstream, Inc.
    Inventors: Dana J. Fraser, Charles Basil Firth
  • Patent number: 6659136
    Abstract: A flexible hose having air-permeability is formed by either: sandwiching an air-permeable tape between tape end edge portions, as leading and trailing in a hose longitudinal direction, of a soft resin tape that is helically wound integrally with the air-permeable tape; or by helically winding only an air-permeable tape. The flexible hose can be properly used as a cleaner hose of a discharge circulation type by using it as an outer tube of a double tube structure. By providing lubricating properties to an inner circumference of the outer tube or an outer circumference of the inner tube, it is possible to prevent wear which might otherwise be caused by rubbing contact between the inner tube and outer tube.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: December 9, 2003
    Assignee: Totaku Industries, Inc.
    Inventors: Kouki Fukui, Hiroyuki Masui, Toshihiro Nakanishi, Isao Kurimoto, Masahiko Ogake
  • Patent number: 6634387
    Abstract: A reinforced flexible tubular pipe including an inner liner (3) that forms a barrier against outflow of medium that flows through the pipe, the inner liner (3) being encased by at least one reinforcing layer having a space in which a number of profiles are configured that are coiled around the inner liner such that the profiles are completely or partially surrounded by a lumen (10) that allows transport of fluids in the longitudinal direction of the pipe. Outside the reinforcing layer an outer coating (9) is provided to form a barrier against inflow of fluids or gases from the surroundings of the pipe to the reinforcing layer. At least one flow path (11) is provided to convey fluid or gas away from the lumen (10). This flow path (11) is provided with an inlet opening that debouches in the lumen (10) and an outlet opening (13) that ends in the inner liner of the tubular pipe.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: October 21, 2003
    Assignee: NKT Flexibles A/S
    Inventor: Kristian Glejbøl
  • Publication number: 20030183293
    Abstract: A flexible method that includes a tubular member defining a longitudinal passage adapted to contain a conveyed fluid, and a plurality of layers of flexible material helically wrapped around the tubular member.
    Type: Application
    Filed: March 26, 2002
    Publication date: October 2, 2003
    Applicant: Wellstream, Inc.
    Inventor: Dana J. Fraser
  • Publication number: 20030120257
    Abstract: There is disclosed a method for introducing a helical formation (11) into a flexible tubular material (12). The material (12) is supported together with a surrounding helical former (13) so as to deform the material (12) to have a helical indentation (11) corresponding to the shape of the former (13). The material (12) is then set in that configuration and the former (13) is removed.
    Type: Application
    Filed: November 20, 2002
    Publication date: June 26, 2003
    Inventors: John Graeme Houston, Peter Arno Stonebridge, John Bruce Cameron Dick, Robert Gordon Hood, Allana Johnstone, Christophe Emmanuel Sarran, Craig McLeod Duff
  • Patent number: 6426462
    Abstract: A device for connection between the ends of tubes (2) protecting one or more cables (9) and a box (4), has a flexible sheath (3) that makes it possible, at the exit from the tubes (2), to connect the cables (9) coming from the tubes (2) to the box in providing for the protection of the said cables (9) and enabling the moving away of the box (4) to be accessed.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: July 30, 2002
    Assignee: France Telecom
    Inventors: Pierre Mignon, Daniel Crespel, Yannick Schreiber
  • Patent number: 6367510
    Abstract: A helically wound and helically ribbed plastic tubing incorporating one or plural support beads with at least one of the support beads defining one or plural helical lumens. The support bead is free of joints or bonding lines extending between the lumen(s) and ambient so that the lumen is free of unintended fluid communication between the lumen and ambient, and the lumen is capable of transporting or containing gaseous or fluid materials without leakage. The support bead may encapsulate an electrical conductor, which may be a heating wire for the purpose of providing a heat source to fluid flow in the central passage of the tubing product. Alternatively, the electrical conductor may be an energy or signal conducting element suited for sensing purposes or data transmission along a length of the tubing, for example. A lumen termination fitting may connect to the tubing. Apparatus and methods for making the tubing product are also disclosed.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: April 9, 2002
    Inventor: Eric Carlson
  • Patent number: 6286557
    Abstract: A sheath for at least partially covering a tubular member, includes a helically wound strip having an electrically conductive portion extending through the strip from an inner surface of the strip to an outer surface of the strip. The conductive portion also extends continuously substantially helically along at least part of the length of the sheath. The sheath, and in particular the strip, may be formed from a flame retardant material.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: September 11, 2001
    Assignee: Spiral Guard Australia Pty. Ltd.
    Inventor: Peter Andrew John May
  • Publication number: 20010017164
    Abstract: A flexible hose having an air-permeability and formed either: by sandwiching an air-permeable tape between the tape end edge portions, as leading and trailing in the hose longitudinal direction, of a soft resin tape to be helically wound, and by winding the air-permeable tape integrally with the soft resin tape; or by winding only the air-permeable tape helically. Especially, the air-permeable flexible hose can be properly used as a cleaner hose of the discharge circulation type by using it as an outer tube of a double tube. By giving lubricating properties to the inner circumference of the outer tube or the outer circumference of the inner tube, on the other hand, it is possible to prevent the wear which might otherwise be caused by the rubbing contact.
    Type: Application
    Filed: February 22, 2001
    Publication date: August 30, 2001
    Inventors: Kouki Fukui, Hiroyuki Masui, Toshihiro Nakanishi, Isao Kurimoto, Masahiko Ogake
  • Patent number: 6192941
    Abstract: A flexible tubular hose, in particular for transporting fluids under pressure, comprising pressure-resistant armoring constituted by winding at least one pair of interlockable metal section wires, one of which has a T-section and the other of which has a U-section, the ribs of the T-section wire being directed toward the outside of the flexible tubular hose and the ribs of the U-section wire being directed toward the axis of the flexible tubular hose.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: February 27, 2001
    Assignee: Coflexip
    Inventors: José Mallen-Herrero, Pascal Estrier, Anne Vincent
  • Patent number: 6016847
    Abstract: The invention relates to a flexible tubular conduit having at least one tubular layer constituted by at least one molded strip of a cross section substantially in the form of an elongated S, wound helically and having a cross section formed of a first and of a second principal cylindrical coaxial spans joined together by an inclined central portion, each of the first and second principal cylindrical spans being united by a first convex radial portion to a first secondary cylindrical span and by a second convex radial portion to a second secondary span.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: January 25, 2000
    Assignee: COFLEXIP
    Inventors: Patrice Jung, Guy Le Bail
  • Patent number: 6009912
    Abstract: A metal pipe and method of forming the same with an integrally formed liner for use in corrosive and abrasive environment utilizes a liner formed of a comparatively thick polymer which is thermally bonded to the metal pipe. An intermediate polymer/adhesive layer is applied to the metal pipe to facilitate thermal/chemical bonding. The intermediate layer is preferably applied to the sheet metal in a pre-treatment process prior to roll forming ribs into the sheet metal. The polyethylene liner is applied after the pipe has been formed, to provide a smooth, hydraulically efficient surface which is resistent to the corrosive action of sulfuric acid and the like encountered in sanitary applications, as well as abrasion caused by the flow of water-born debris such as dirt and gravel as is encountered in culvert applications.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: January 4, 2000
    Inventor: James R. Andre
  • Patent number: 5899237
    Abstract: An abrasion resistant composite hose comprises (a) an outer layer composing a spiral tape of a soft synthetic resin, where adjacent side edges of the spiral tape join each other to form the outer layer, (b) a spiral reinforcement of a hard synthetic resin for retaining and reinforcing the outer layer, and (c) an inner layer comprising a spiral strip formed by a rubber, where adjacent side edges of the spiral strip join each other to form the inner layer, and the outer layer and inner layer join each other. In such a composite hose having this structure, at least a periphery of the strip except an exposed surface to an inner surface of the hose is covered with a covering element comprising a rubber adhesive to the soft synthetic resin constituting the outer layer, and the rubber strip is formed by a rubber having higher abrasion resistance than the covering element to obtain a composite hose having enhanced abrasion resistance.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: May 4, 1999
    Assignee: Tigers Polymer Corporation
    Inventors: Youichi Akedo, Seiji Shiga, Tetsuya Inagake, Shoji Hattori, Yoshiki Yoshitomi
  • Patent number: 5896894
    Abstract: Recesses or openings (4) are arranged in a wall of an elongated tubular covering (3) made of resinous plastics that are resistant to temperature stresses and/or aggressive media; these openings are covered from the outside by a microporous layer (5) made of a fluoropolymer that is resistant to high temperatures.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: April 27, 1999
    Assignee: Eilentropp KG
    Inventors: Klaus Schwamborn, Manfred Sikora, Walter Steffes
  • Patent number: 5881775
    Abstract: A heat exchanger tube (2, 2a, 2b) is made using a hollow, impermeable, monolithic ceramic inner tube (4) and wrapping the inner tube with a circumferentially extending reinforcing material (12) impregnated with a slurry of ceramic particles, particle carrier medium and thermoset binder. The combination of the inner tube and the impregnated reinforcing material is first heated to solidify the thermoset binder. The combination is then sintered to drive off the particle carrier medium and themoset binder to create a two-layer heat exchanger tube including the inner tube and an outer tube (6).
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: March 16, 1999
    Assignee: Hexcel Corporation
    Inventors: Thomas K. Owen, James R. Watts, Milton F. Custer, Kevin D. McVicker
  • Patent number: 5837083
    Abstract: A method of forming a hollow elongated or tubular body consisting of the steps of winding one or more strips of material in self-overlapping fashion to produce a multi-layer tubular structure, the or each strip prior to winding being pre-formed to provide a transverse cross-section having at least one step which, in each convolution of the strip accommodates the overlapping portion of the next convolution.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: November 17, 1998
    Inventor: John Peter Booth
  • Patent number: 5795634
    Abstract: A heat insulating noise reducing duct includes: an internal layer formed by helically winding a flat fibrous band and integrally bonding outer circumferential faces of adjacent joint parts of the band by resin reinforcing bands to thereby form a substantially smooth cylindrical shape; one or more resin linear bodies helically wound between these adjoining resin reinforcing bands and bonded to the fibrous band; an open-cell foam layer formed by helically winding an open-cell foam resin band onto an outer circumferential face of the inner layer while making its paired side edges abut each other; an intermediate sheet layer formed by helically winding a thin resin sheet-like band onto an outer circumferential face of the open-cell foam band while partially overlapping the resin sheet-like band, and by integrally bonding the overlapped parts; a closed-cell foam layer formed by helically winding a closed-cell foam resin band onto an outer circumferential face of the sheet layer while making its paired side edges a
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: August 18, 1998
    Assignee: Totaku Industries, Inc.
    Inventor: Kouki Fukui
  • Patent number: 5780123
    Abstract: A tubular liner, for lining the inner wall of a pipe, comprises a plurality of composite liner tubes, each liner type contains an inner layer of a resin-absorbable sheet and an outer layer of hermetic plastic film. The composite liner tubes are joined by spirally stitched abutting ends. In an embodiment, the inner resin-absorbable sheets are joined. An adhesive can be applied to the inner and outer walls of the resin-absorbable sheet along the stitched spiral seam.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: July 14, 1998
    Assignees: Yokoshima & Company, Shonan Gosei-Jushi Seisakusho K.K.
    Inventors: Takao Kamiyama, Yasuhiro Yokoshima
  • Patent number: 5769127
    Abstract: A pipe wall has an inner wall cylindrically formed of a soft material of rubber, synthetic rubber or synthetic resin, a rising rib bonded at its base portion onto an outer circumferential surface of the inner wall so as to extend therefrom in an outer circumferential direction, and an outer wall coupled at its base end portion with the rising rib so as to extend in an axial direction of the pipe in a position separated at a predetermined distance circumferentially from the inner wall, the rib and the outer wall being formed of a hard synthetic resin material and wound spirally, wherein only a top end portion of the outer wall is coupled with a preceding winding of the outer wall, and separable dividing portion is formed between the top end portion and the base end portion.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: June 23, 1998
    Inventors: Shiro Kanao, deceased, by Chizuko Kanao, heir, by Shigeki Kanao, heir
  • Patent number: 5662145
    Abstract: A dual bias weld is an improved weld for joining strips to be formed into coiled tubing. Tubing is formed from a first strip and a second strip, the first and second strips being of the same width. A planar end surface is formed on an end of the first strip, the plane of the planar end surface being defined by a line lying along a top surface of the first strip at an acute angle with respect to the longitudinal direction of the first strip and a line lying along an edge surface of the first strip at an acute angle with respect to the longitudinal of the first strip. Similarly, a planar end surface is formed on an end of the second strip, the plane of the planar end surface being defined by a line lying along a top surface of the second strip at an acute angle with respect to the longitudinal direction of the second strip and a line lying along an edge surface of the second strip at an acute angle with respect to the longitudinal direction of the second strip.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 2, 1997
    Assignee: Quality Tubing, Inc.
    Inventor: Robert E. Stagg
  • Patent number: 5526849
    Abstract: A flexible duct and method for making the duct are disclosed. The duct includes an inner wall bonded to an outer wall, so as to sandwich a wire resilient helix and a yarn helix therebetween. The yarn helix is axially displaced from the wire helix so that the turns of the yarn helix are intermediate of the turns of the wire helix. The method of manufacturing the duct includes forming the wire and yarn helix about the inner wall and bonding the outer wall to the inner wall so as to sandwich the helix between the inner and outer walls.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: June 18, 1996
    Inventor: William R. Gray
  • Patent number: 5329973
    Abstract: A rigid polyvinyl chloride pipe comprises a strip member A that comprises a rigid polyvinyl chloride strip 1 with a U-shaped cross section consisting of an intermediate portion 1a of a predetermined width having a generally flat surface on at least one lateral side and two ribs 1b that extend from opposite sides of the intermediate portion 1a in a generally perpendicular direction with respect to the intermediate portion, with a layer of flexible synthetic resin 2 highly fusible to the rigid polyvinyl chloride resin being fused integrally to substantially the entire outer surface of the lateral side of both ribs 1b.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: July 19, 1994
    Inventor: Shiro Kanao
  • Patent number: 5191911
    Abstract: A system for making a long length of seam-welded tubing from shorter lengths of flat metal strip which are spliced end-to-end and formed into tubular form and seam-welded. Adjoining ends of two successive lengths of the strip are trimmed at supplementary angles, one of which is an acute angle. The trimmed ends are abutted and welded, preferably with weldment extending beyond each such end. All surfaces of the weld are finished to match the dimensions of the strip. The tubing, along with the welded joints, is heat treated as the tubing is formed to produce a product substantially free of internal surface roughness along the splice welds.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: March 9, 1993
    Assignee: Quality Tubing, Inc.
    Inventor: Jon D. Dubois
  • Patent number: 5131325
    Abstract: A reusable printing sleeve for supporting flexible printing plates, the sleeve having a limited circumferential resilience, whereby when subjected to air jets emitted from the apertures in the wall of a printing cylinder, the sleeve is dilated to facilitate the application of the sleeve to the cylinder or its removal therefrom. The sleeve is constituted by four or five interlaminated layers. The innermost one or two layers are comprised of wide strips of plastic film helically wound about a cylindrical shape. The outer three layers of the sleeve are constituted of three interlaminated layers each formed by helically wound of synthetic plastic tape. All three outer layers are wound at helix angles substantially different from the innermost layer or layers.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: July 21, 1992
    Assignee: Flexographic Technology, Inc.
    Inventor: Richard M. Blauvelt
  • Patent number: 5063969
    Abstract: A self-erecting, coiled metal tube comprises a helically wound ribbon of spring material having an inside surface and an outside surface, the ribbon having adjacent turns stressed to coil in tight overlapping and telescoping engagement, and a textured surface formed on the outside surface of the ribbon so that when the ribbon is extended, the textured surface of an underlapped turn of ribbon bears against the inner surface of an overlapped turn of ribbon to create friction between the adjacent turns of ribbon and control the length of extension of the ribbon tube and strengthen the tube.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: November 12, 1991
    Assignee: Ametek, Inc.
    Inventor: Kenneth J. Snyder
  • Patent number: 5060698
    Abstract: A large-caliber pipe consisting of thermoplastic, constructed from an extruded hollow plastic profile having helical turns welded along a helical contact seam. The hollow plastic profile is a multi-cell profile having a rectangular overall cross section and a rectangular cross section of the cells. The plastic has an integrated reinforcement consisting of embedded fibers in a quantity of 5 to 30% by weight, preferably about 10% by weight, based on the total weight. At least a proportion of the fibers is oriented in the direction of the turns. The orientation of the fibers results in an anisotropic modulus of elasticity and hence an increased annular rigidity and stability.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 29, 1991
    Assignee: George Aristovoulos Petzetakis
    Inventors: Costas Anastassakis, John Charaktinos
  • Patent number: 5046531
    Abstract: A synthetic resin pipe intended for underground use is disclosed having both an improved strength and flexibility but reduced weight. An inner layer of the body of the pipe is formed of a synthetic resin, and a reinforcing layer is wound around the inner layer. The reinforcing layer is porous, and may be composed of a helically wound punched metal belt, mesh, or the like. An outer layer composed of a helically wound belt of synthetic resin having a high fusibility with the material of the inner layer is formed over the reinforcing layer. A reinforcing rib, forming the corrugations of the pipe, is wound around the outer layer. If desired, the reinforcing rib can be made integral with the belt of the outer layer.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: September 10, 1991
    Inventor: Shiro Kanao
  • Patent number: 4965105
    Abstract: An insulation sleeve for the can-shaped soluble anode of a round galvanic primary cell, which immobilizes emerging electrolyte and shields retained moisture from the exterior, and which electrically insulates the electrode conductor, includes a helically wound paper web having a plastic lining on one side and a lengthwise paper edge which is endlessly folded over, and which is wound onto a winding spindle so that the folded-over edge helically overlaps the opposite edge of the paper web to allow the superimposed plastic layers to be welded to one another in the overlapping zone. By successively winding a conventional paper strip with the plastic-lined paper web, an even stronger sleeve tube is obtained, which can then be cut into individual sleeves.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 23, 1990
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Klaus Ruggeberg, Horst-Udo Jose
  • Patent number: 4950122
    Abstract: A container of monococque construction having a peripheral wall comprised of concentric inner and outer walls, with the space between the walls being filled with a plastics material. At least one of the inner and outer walls is a spirally-wound tube having raised seams projecting into the space between the inner and outer walls. The container is particularly adapted to form the body of a waste compactor for use as a bulk container for both fluid and particulate materials.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: August 21, 1990
    Inventor: Stig-Ragnar J. Landsdorff
  • Patent number: RE33060
    Abstract: A high speed yarn carrier or tube comprising a plurality of spirally wound plies of paper and incorporating, beneath the very thin overlapped outer surface defining ply, a strong underply provided with opposed deckle edges overlapped to a width no greater than that of the individual deckle edges. The deckle edge overlap is preferably less than a full overlapping whereby a small sink or depression is formed at the overlap.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: September 19, 1989
    Assignee: Sonoco Products Company
    Inventors: McCleery B. Cunningham, Clement D. LeHardy