US3490496A - Coaxial tubing having improved spacer means - Google Patents

Coaxial tubing having improved spacer means Download PDF

Info

Publication number
US3490496A
US3490496A US3490496DA US3490496A US 3490496 A US3490496 A US 3490496A US 3490496D A US3490496D A US 3490496DA US 3490496 A US3490496 A US 3490496A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
ribbon
inner tube
tubing
tubes
coaxial tubing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Thornton Stearns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vacuum Barrier Corp
Original Assignee
Vacuum Barrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/153Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/12Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
    • F16L59/125Helical spacers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/141Arrangements for the insulation of pipes or pipe systems in which the temperature of the medium is below that of the ambient temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/18Double-walled pipes; Multi-channel pipes or pipe assemblies

Description

T- STEARNS 3,490,496

COAXIAL-TUBING HAVING IMPROVED SPACER MEANS Jan. 20,- 1970 Filed Jan. 15, 1968 FIG 6 United States Patent 3,490,496 COAXIAL TUBING HAVING IMPROVED SPACER MEANS Thornton Stearns, Winchester, Mass, assignor to Vacuum Barrier Corporation, Woburn, Mass., a corporation of Delaware Filed Jan. 15, 1968, Ser. No. 697,747 Int. Cl. F161 9/18 US. Cl. 138-112 14 Claims ABSTRACT OF THE DISCLOSURE Coaxial tubing, as for cryogenic transfer lines, has a spacer for inner and outer preferably spirally corrugated tubes, the spacer being a plastic ribbon spirally twisted about its own axis and also wound helically around the inner tube to contact the inner tube at spaced intervals only and with its opposite continuous edges contacting the inner tube at said intervals in alternation, as for example, at every 90 of its revolution around the inner tube, thus simultaneously presenting its other continuous edge facing radially outwardly in alternation at every 90 interval so that the ribbon extends at every 90 interval transversely of the annular space between the two tubes for maintaining the two tubes in concentric relation. In modified forms, layers of insulating wrap may be interposed either between the spacing and the outer tube or around the inner tube radially inwardly of the spacer of both, and the ribbon, instead of being of uniform width, may have its edges notched to conform better to the contour of the inner tube and give better stability to the spacer.

This invention relates to coaxial tubing and more particularly to flexible transfer lines for cryogenic liquids having concentric spaced tubes providing an interveningannular insulating space which may contain insulation or be evacuated or both, though the tubing is also useful for other purposes such as electrical cable.

Coaxial tubing, whether rigid or having a degree of flexibility, requires some structure between the tubes which will maintain the tubes in generally concentric relation.

Unfortunately, any solid rigidifying structure bridging the space between the tubes and provided for this purpose forms a path for thermal leakage (or dielectric losses) and the greater the minimum cross-sectional dimension of the structure and the greater the contact area thereof with the tube walls, the greater the losses. Additionally, the provision of bridging rigidifying structure can complicate evacuation of the annular insulating space after fabrication of the tubing.

One form of spacer means that has found use is a plastic square or rectangular ribbon which is wound spirally around the inner tube and has a thickness approximating the minimum radial dimension of the annular insulating space and a cross-width dimension sufficient to prevent its collapse. Such ribbons are particularly used where the outer tube is continuously formed around the ribbon-wound inner tube.

In accordance with this invention, the losses encountered in such prior structures as well as the amount of ribbon material required per unit length of coaxial tubing are substantially reduced by the expedient of twisting a flat ribbon about its own axis before or as it is laid into the inner tube so that, for example, a 180 twist is made in the ribbon for each quarter revolution of helical winding around the inner tube, with the consequence that a ribbon of uniform width approximating the maximum radial dimension of the annular space between the tubes will at most contact the tubes edgewise only at spaced intervals with one continuous edge of the ribbon first contacting the inner tube and then contacting or at least facing the outer tube at the next twist and thus alternating so on down the length of the tubing. Meanwhile, the opposite edge of the ribbon alternately also contacts first the inner and then faces or contacts the outer tube down the length of the tubing at intervals spaced between the intervals of contact of the first edge and usually offset circumferentially around the inner tube from the points of contact of the one edge with the inner tube. For the purpose of the description herein given, the inner tube may be smooth or corrugated with or without surrounding insulation wrap. If corrugated, it may also include a surrounding reinforcing wire braid. Similarly the outer tube may be smooth or corrugated with or without an inner lining of insulation.

Assemblies of this invention provide substantial advantages which will hereinafter be described after a better understanding of the structures is provided by reference to typical embodiments of the invention as shown in the accompanying drawings wherein:

FIG. 1 is a vertical cross-sectional view through a typical embodiment of the invention; and

FIG. 2 is a similar cross-sectional view taken with the tubing of FIG. 1 rotated end to end 180;

FIG. 3 is a plan view of a modified form of ribbon that may be used in lieu of the ribbon shown in FIGS. 1 and 2;

FIG. 4 is a similar plan view of a still further modified form of ribbon;

FIG. 5 is a cross-sectional view showing the ribbon of FIG. 4 in the structure of FIG. 1;

FIG. 6 is a vertical cross-sectional view showing a modified form of assembly; and

FIG. 7 is a cross-sectional view of an assembly like that of FIG. 6 but omitting insulating wrap on the inner tube.

In FIGS 1 and 2 of the drawings, 10 indicates a spirally corrugated inner tube and 12 a spirally corrugated outer tube. Such tubing is commonly made of copper and has a degree of flexibility on a fairly large radius. Helically wound around the inner tube 10 is a length of flat metal or plastic ribbon 20, preferably polytetrafluoroethylene, of uniform width with a pitch of approximately 45 relative to the axis of the tubing.

The ribbon 20 is twisted 180 about its own axis every of its revolution around the tube 10 so that one or the other of its opposite edges contacts the inner tube edgewise once every 90 of each revolution.

Thus edge 21 of ribbon 20 faces radially outwardly at points A, C, E, G, I, K and M, whereas it faces radially inwardly and contacts the inner tube 10 at points B, D, F,H,J,Land N.

The opposite edge 22 of the ribbon accordingly faces radially inwardly and contacts tube 10 at points A, C, E, G, I, K and M; and faces radially outwardly at the intervening points B, D, F, H, I, L and N.

Also it will be noted that where either one of the edges faces radially inwardly, it tends to seat itself in one of the troughs 30 intervening the crests 32 on the inner tube 10. This tends to happen at the points B, F, J and N in FIG. 1 and at D, H, and L in FIG. 2 of the drawings, although for the purposes of clarity, the drawing shows the ribbon in a more nearly symmetrical spiral at these points.

Normally the ribbon is of such width that it may, but does not necessarily, contact the outer tube at all the twist points, but the ribbon does form a spacer which will maintain the two tubes in concentric spaced configuration.

The pitch of the ribbon may be something other than 45 and the ribbon may be twisted at closer os longer intervals along its length than those shown in the drawings, depending upon how much support between the two tubes is necessaryor desirable. In any event, as shown in the drawings, there never is any bridging contact between the two tubes so far as the'spacer is concerned except at the points A-N inclusive, where the ribbon is radially oriented, with the increments of the ribbon between these points always laying spaced from the outer tube due to the twisting configuration of the ribbon.

For example, where the outer tube has an inside diameter of 1.245 inches and the inner tube has an outside diameter of .795 inch, the ribbon may be .285 inch wide and .04 inch thick. In cryogenic use, with a vacuum better than 10 torr, heat leakage has been reduced to only 1.2 B.t.u. per hour per linear foot when measured between room temperature and 320 F. For larger lines the tape width may run up to .4 inch and a greater thickness may be used running up to .1 inch or more depending upon the radial dimension between the tubes.

Application of the structure of the invention is not confined to corrugated tubing but is useful also with straight rigid tubes. The inner tube when corrugated may include an outer tubular braided reinforcing wrap 50, as shown in FIG. 6, such is is often now used with other spacer constructions for increasing the pressure rating and as shown for instance in US. Patent No. 3,240,234.

FIG. 3 shows a modified ribbon 20a, the same as that used in FIGS. 1 and 2 except that its edges are provided with cut-outs or notches 40 in staggered relation down the length of the ribbon and spaced at such intervals that the notches will, in theassembled line, engage the inner tube at the points where the twisting ribbon will extend approximately radially across the annular space between the tubes. The notches may have a radius slightly greater than that of the inner tube because of the angle of contact as shown in FIG. 5. The notched configuration does afford a gain in stability in the ribbon because of the more conforming contour of the ribbon with the surface of the tube at the contacting points.

FIG. 4 shows a still further modified form of ribbon 20b wherein the notches-40 instead of being staggered down the length of then'bbon appear periodically on opposite sides of the ribbon, thus making it immaterial which particular side of the ribbon is presented to the inner tube since both sides are notched. FIG. 5 shows thei ribbon of FIG. 4 positioned in the tubing of FIGS. 1 an 2.

In FIG. 6 the diameter of outer tube 12a has also been enlarged so that helically or spirally loosely wound multiple layers of insulation of the type, for example, described in US. Patent No. 3,240,234, and comprising alternate layers of aluminum coated plastic film with fiberglass sheetingin a loose Wrap may be made a part of the inner tube. The reinforced and insulation wrapped inner tube is then wound with the twisted ribbon 20, 20a or 20b. Thereafter another layer of insulation is wrapped over the ribbon and then the assembly is enclosed in the outer tube 12a. The insulation 52 and 54 is thus compressed only at the points of radial orientation of the ribbon, leaving the optimal density of the wrapping, as explained in US. Patent No. 3,236,406, throughout the remainder of the annular space between the tubing.

FIG. 7 shows loose wrap multiple layer insulation interposed only outside of the wound ribbon 20, again with compression of the layers occurring substantially only at the points of radial orientation of the ribbon. As is obvious, instead of omitting, as in FIG. 7, the inner tube insulation layer, the outer tube insulating liner 54 may be omitted while retaining the inner tube insulation wrap 52 with or without the reinforcing tubular wire braid 50. There is thus provided a spacer means in all forms which may be readily placed between the two tubes during continuous forming operations using a minimum of material for the spacer. Under certain circumstances, particularly in larger sizes, two or more separate twisted ribbons may be wound on the inner tube in spaced relation both having the same pitch and having either the same or difierent twist intervals.

The construction also makes it easier to draw a vacuum from the passage between the two tubes, whether containing insulation layers or not, because of the minimum obstruction by the spacer, less than is encountered with untwisted ribbon. Moreover, the required rigidity against collapse is afforded, because of the twists, by a much thinner ribbon than that which could be used in the absence of the twists of the ribbon about its own axis.

What is claimed is:

1. Coaxial tubing comprising:

inner and outer concentrically arranged tubes, and

spacing means extending longitudinally of said tubing between said tubes and comprising a continuous fiat ribbon, said ribbon being twisted about its own axis to present opposite continuous edges which contact said inner tube alternately at spaced intervals along said edges with said flat ribbon extending radially of said tubing only at the same intervals.

2. Coaxial tubing as claimed in claim 1, wherein said ribbon is of uniform width.

3. Coaxial tubing as claimed in claim 1, wherein said ribbon is a plastic ribbon.

4. Coaxial tubing as claimed in claim 1, wherein said edges face radially outwardly between their successive adjacent points of contact with said inner tube.

5. Coaxial tubing as claimed in claim 1, wherein edges of said ribbon have notches where said edges contact said inner tube to aid stabilizing said ribbon.

6. Coaxial tubing as claimed in claim 3, wherein said ribbon has additional notches in its edges opposite the notches at the inner tube contacting intervals.

7. Coaxial tubing as claimed in claim 1, wherein said inner tube includes an outer loose wrap of multiple layers of insulation compressed only at said spaced intervals.

8. Coaxial tubing as claimed in claim 1, wherein a loose wrap of multiple layers of insulation surround said ribbon, said wrap being compressed only where said edges face radially outwardly.

9. Coaxial tubing as claimed in claim 8, wherein said inner tube includes an outer wrap of loose multiple layers of insulation compressed only at said spaced intervals.

-10. Coaxial tubing as claimed in claim 1, wherein said twisted ribbon is helically wound around said inner tube.

11. Coaxial tubing as claimed in claim 10, wherein said ribbon is twisted per each quarter revolution of its helical winding around said inner tube.

12. Coaxial tubing as claimed in claim 10, wherein the pitch of said helical winding is about 45 relative to the axis of said tubing.

13. Coaxial tubing as claimed in claim 10, wherein said ribbon extends radially of said tubing only at circumferentially spaced intervals along its helical winding.

14. Coaxial tubing as claimed in claim 13, wherein said inner tube has a spirally corrugated configuration to form an outer surface having external crests and intervening grooves and said radially extending portions of said ribbon are seated in the grooves between the crests in the walls of said inner tube.

References Cited UNITED STATES PATENTS Re. 8,745 6/1879 Merriam 138-114 1,959,367 5/1934 Kennedye 138-148 2,714,395 8/1955 Epstein 138-413 3,332,446 7/1967 Mann 138148 FOREIGN PATENTS 1,008,040 10/ 1965 Great Britain.

HERBERT F. ROSS, Primary Examiner US. Cl. X.R. 138-114

US3490496A 1968-01-15 1968-01-15 Coaxial tubing having improved spacer means Expired - Lifetime US3490496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US69774768 true 1968-01-15 1968-01-15

Publications (1)

Publication Number Publication Date
US3490496A true US3490496A (en) 1970-01-20

Family

ID=24802366

Family Applications (1)

Application Number Title Priority Date Filing Date
US3490496A Expired - Lifetime US3490496A (en) 1968-01-15 1968-01-15 Coaxial tubing having improved spacer means

Country Status (7)

Country Link
US (1) US3490496A (en)
JP (1) JPS498963B1 (en)
BE (1) BE726941A (en)
DE (1) DE1901069C2 (en)
FR (1) FR2000268A1 (en)
GB (1) GB1257701A (en)
NL (1) NL160646C (en)

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646972A (en) * 1970-02-27 1972-03-07 Kabel Metallwerke Ghh Multitubing system
JPS477759U (en) * 1971-02-18 1972-09-28
US3706208A (en) * 1971-01-13 1972-12-19 Air Prod & Chem Flexible cryogenic liquid transfer system and improved support means therefor
US3717718A (en) * 1970-12-01 1973-02-20 Kabel Metallwerke Ghh High pressure cable
US3724507A (en) * 1972-03-06 1973-04-03 Dayco Corp Continuously manufactured flexible conduit
JPS4877411A (en) * 1971-12-27 1973-10-18
JPS4947261U (en) * 1972-07-26 1974-04-25
JPS4968053U (en) * 1972-09-21 1974-06-13
US3831636A (en) * 1970-12-28 1974-08-27 Kabel Metallwerke Ghh Armored tubing with helical or circular corrugation
JPS49118453U (en) * 1973-02-06 1974-10-09
US3866670A (en) * 1969-02-22 1975-02-18 Kabel Metallwerke Ghh Tube bundle cable
US4303105A (en) * 1979-09-28 1981-12-01 Kabel-Und Metallwerke Gutehoffnungshuette Ag Insulated transmission line for cryogenic media
US4354657A (en) * 1980-12-29 1982-10-19 Karlberg John E Supports for coaxial conduits
US4766662A (en) * 1984-08-15 1988-08-30 Dayco Products, Inc. Method of protecting hose with a plastic abrasion-resistant protective sleeve
US4967799A (en) * 1984-08-15 1990-11-06 Dayco Products, Inc. Plastic abrasion-resistant protective sleeve for hose and method of protecting hose
US5343738A (en) * 1992-10-16 1994-09-06 Furon Company Double walled containment fuel transfer hose
US5377670A (en) * 1986-09-23 1995-01-03 Smith; Charles A. Insulated breathing tube
US5556679A (en) * 1994-04-15 1996-09-17 A. O. Smith Corporation Flexible dual wall hose or pipe assembly
US5865216A (en) * 1995-11-08 1999-02-02 Advanced Polymer Technology, Inc. System for housing secondarily contained flexible piping
EP0949444A2 (en) 1998-04-09 1999-10-13 Semperit Aktiengesellschaft Holding Flexible cryogenic hose
US6032699A (en) * 1997-05-19 2000-03-07 Furon Company Fluid delivery pipe with leak detection
US6186181B1 (en) * 1998-04-23 2001-02-13 Alcatel Flexible line pipe
USRE37114E1 (en) 1993-11-01 2001-03-27 Advanced Polymer Technology, Inc. Secondary containment flexible underground piping system
US6346671B1 (en) * 1997-08-29 2002-02-12 Alcatel Coaxial high-frequency cable
US6349748B1 (en) * 1999-03-29 2002-02-26 Robroy Industries, Inc. Insulated tubing
US20040216795A1 (en) * 2003-04-30 2004-11-04 Klaus Schippl Flexible conduit
US20050072484A1 (en) * 2003-09-12 2005-04-07 Hans-Georg Haertl Conduit for drawing off and/or supplying a fluid
US20060130881A1 (en) * 2004-12-21 2006-06-22 Sanjay Rastogi Method of cleaning optical tools for making contact lens molds using super-cooled fluids
US20060131769A1 (en) * 2004-12-22 2006-06-22 Bausch & Lomb Incorporated Pre-polymer extraction using a super-cooled fluid
US20060201567A1 (en) * 2005-03-14 2006-09-14 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
US20070132125A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Use of a super-cooled fluid in lens processing
US20070132121A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Method of cleaning molds using super-cooled fluids
US20070132119A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Use of a super-cooled fluid in the manufacture of contact lenses
US20070132120A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Preferential release of an ophthalmic lens using a super-cooled fluid
WO2008071637A2 (en) * 2006-12-11 2008-06-19 Single Buoy Moorings Inc. Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
US20080203607A1 (en) * 2007-02-26 2008-08-28 Advanced Drainage Systems, Inc. Pipe Extrusion Die Flow Path Apparatus and Method
US20080203608A1 (en) * 2007-02-26 2008-08-28 Advanced Drainage Systems, Inc. Defined Ratio Dual-Wall Pipe Die
US20080290538A1 (en) * 2007-05-23 2008-11-27 Biesenberger Jeffrey J Extruder ramp-up control system and method
US20090127852A1 (en) * 2007-11-16 2009-05-21 Sutton Gerald S Three-Wall Corrugated Pipe Couplings and Methods
US20090127853A1 (en) * 2007-11-16 2009-05-21 Sutton Gerald S Three-wall corrugated pipe couplings and methods
US20090133697A1 (en) * 2005-05-23 2009-05-28 Resmed Limited Connector system for an apparatus that delivers breathable gas to a patient
US20090200694A1 (en) * 2008-02-11 2009-08-13 Advanced Drainage Systems, Inc. Extrusion die vacuum seals and methods
US20100089074A1 (en) * 2008-10-14 2010-04-15 Sutton Gerald S Apparatus and Method for Cooling an Outer Wall of Pipe
US8114324B2 (en) 2008-10-14 2012-02-14 Advanced Drainage Systems, Inc. Apparatus and method for pressing an outer wall of pipe
US20130112201A1 (en) * 2010-05-25 2013-05-09 Fisher & Paykel Healthcare Limited Breathing tube
US8550807B2 (en) 2008-05-28 2013-10-08 Advanced Drainage Systems, Inc. In-mold punch apparatus and methods
US8733405B2 (en) 2005-03-14 2014-05-27 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
US20170146175A1 (en) * 2014-07-10 2017-05-25 Witzenmann Gmbh Line assembly

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210173C2 (en) * 1972-03-03 1983-08-04 Kabelmetal Electro Gmbh, 3000 Hannover, De
DE3334770C2 (en) * 1983-09-26 1994-03-31 Kabelmetal Electro Gmbh Pipe for the drainage of frozen media
FR2568849A1 (en) * 1984-05-15 1986-02-14 Air Liquide Appliance for supplying hot water to a deep-sea diver and flexible hose for such an appliance
GB2179977B (en) * 1985-09-04 1989-08-23 Shell Int Research Fire resistant structure
GB2182999B (en) * 1985-11-15 1989-09-27 Italiana Serrature Torino A fuel filler member for vehicles
DK432787D0 (en) * 1986-08-21 1987-08-19 Kabelmetal Electro Gmbh Thermally insulated line pipes
EP0327148B1 (en) * 1988-02-02 1991-11-27 FIAT AUTO S.p.A. Insulating device for an internal combustion engine exhaust system
JP2011220506A (en) * 2010-04-14 2011-11-04 Sumitomo Electric Ind Ltd Heat insulating pipe and superconductive cable
JP5505866B2 (en) * 2010-04-30 2014-05-28 住友電気工業株式会社 The heat-insulated pipe and the superconducting cable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959367A (en) * 1932-09-24 1934-05-22 Charles B Kennedye Well casing
US2714395A (en) * 1952-05-24 1955-08-02 Epstein Saul Inner spacer for double wall vent pipe
GB1008040A (en) * 1961-12-13 1965-10-22 Stork & Co Nv Improvements in or relating to a method for concentrically mounting tubes
US3332446A (en) * 1964-05-15 1967-07-25 Douglas B Mann Cryogenic transfer line arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240234A (en) * 1960-02-24 1966-03-15 Union Carbide Corp Hose for low-temperature liquids
DE1840230U (en) * 1961-08-05 1961-10-26 Rohrwerk Haltern G M B H Armored line pipe from metal.
US3236406A (en) * 1963-08-29 1966-02-22 Union Carbide Corp Spaced wall insulated container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959367A (en) * 1932-09-24 1934-05-22 Charles B Kennedye Well casing
US2714395A (en) * 1952-05-24 1955-08-02 Epstein Saul Inner spacer for double wall vent pipe
GB1008040A (en) * 1961-12-13 1965-10-22 Stork & Co Nv Improvements in or relating to a method for concentrically mounting tubes
US3332446A (en) * 1964-05-15 1967-07-25 Douglas B Mann Cryogenic transfer line arrangement

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866670A (en) * 1969-02-22 1975-02-18 Kabel Metallwerke Ghh Tube bundle cable
US3646972A (en) * 1970-02-27 1972-03-07 Kabel Metallwerke Ghh Multitubing system
US3717718A (en) * 1970-12-01 1973-02-20 Kabel Metallwerke Ghh High pressure cable
US3831636A (en) * 1970-12-28 1974-08-27 Kabel Metallwerke Ghh Armored tubing with helical or circular corrugation
US3706208A (en) * 1971-01-13 1972-12-19 Air Prod & Chem Flexible cryogenic liquid transfer system and improved support means therefor
JPS477759U (en) * 1971-02-18 1972-09-28
JPS4877411A (en) * 1971-12-27 1973-10-18
JPS5723156B2 (en) * 1971-12-27 1982-05-17
US3724507A (en) * 1972-03-06 1973-04-03 Dayco Corp Continuously manufactured flexible conduit
JPS4947261U (en) * 1972-07-26 1974-04-25
JPS4968053U (en) * 1972-09-21 1974-06-13
JPS49118453U (en) * 1973-02-06 1974-10-09
US4303105A (en) * 1979-09-28 1981-12-01 Kabel-Und Metallwerke Gutehoffnungshuette Ag Insulated transmission line for cryogenic media
US4354657A (en) * 1980-12-29 1982-10-19 Karlberg John E Supports for coaxial conduits
US4766662A (en) * 1984-08-15 1988-08-30 Dayco Products, Inc. Method of protecting hose with a plastic abrasion-resistant protective sleeve
US4967799A (en) * 1984-08-15 1990-11-06 Dayco Products, Inc. Plastic abrasion-resistant protective sleeve for hose and method of protecting hose
US5377670A (en) * 1986-09-23 1995-01-03 Smith; Charles A. Insulated breathing tube
US5343738A (en) * 1992-10-16 1994-09-06 Furon Company Double walled containment fuel transfer hose
USRE37114E1 (en) 1993-11-01 2001-03-27 Advanced Polymer Technology, Inc. Secondary containment flexible underground piping system
US5556679A (en) * 1994-04-15 1996-09-17 A. O. Smith Corporation Flexible dual wall hose or pipe assembly
US5865216A (en) * 1995-11-08 1999-02-02 Advanced Polymer Technology, Inc. System for housing secondarily contained flexible piping
US6032699A (en) * 1997-05-19 2000-03-07 Furon Company Fluid delivery pipe with leak detection
US6346671B1 (en) * 1997-08-29 2002-02-12 Alcatel Coaxial high-frequency cable
EP0949444A2 (en) 1998-04-09 1999-10-13 Semperit Aktiengesellschaft Holding Flexible cryogenic hose
EP0949444A3 (en) * 1998-04-09 2003-01-22 Semperit Aktiengesellschaft Holding Flexible cryogenic hose
US6186181B1 (en) * 1998-04-23 2001-02-13 Alcatel Flexible line pipe
US6349748B1 (en) * 1999-03-29 2002-02-26 Robroy Industries, Inc. Insulated tubing
US20040216795A1 (en) * 2003-04-30 2004-11-04 Klaus Schippl Flexible conduit
US6840284B2 (en) * 2003-04-30 2005-01-11 Nexans Flexible conduit
US20050072484A1 (en) * 2003-09-12 2005-04-07 Hans-Georg Haertl Conduit for drawing off and/or supplying a fluid
US20060130881A1 (en) * 2004-12-21 2006-06-22 Sanjay Rastogi Method of cleaning optical tools for making contact lens molds using super-cooled fluids
US20060131769A1 (en) * 2004-12-22 2006-06-22 Bausch & Lomb Incorporated Pre-polymer extraction using a super-cooled fluid
US7484535B2 (en) 2005-03-14 2009-02-03 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
US8733405B2 (en) 2005-03-14 2014-05-27 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
US20060201567A1 (en) * 2005-03-14 2006-09-14 Advanced Drainage Systems, Inc. Corrugated pipe with outer layer
US9211398B2 (en) * 2005-05-23 2015-12-15 Resmed Limited Connector system for an apparatus that delivers breathable gas to a patient
US20090133697A1 (en) * 2005-05-23 2009-05-28 Resmed Limited Connector system for an apparatus that delivers breathable gas to a patient
US20070132121A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Method of cleaning molds using super-cooled fluids
US20070132120A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Preferential release of an ophthalmic lens using a super-cooled fluid
US20070132119A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Use of a super-cooled fluid in the manufacture of contact lenses
US20070132125A1 (en) * 2005-12-08 2007-06-14 Bausch & Lomb Incorporated Use of a super-cooled fluid in lens processing
CN101589262B (en) 2006-12-11 2011-10-26 单点系泊公司 Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
WO2008071637A3 (en) * 2006-12-11 2008-09-04 Single Buoy Moorings Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
WO2008071637A2 (en) * 2006-12-11 2008-06-19 Single Buoy Moorings Inc. Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
US20100024911A1 (en) * 2006-12-11 2010-02-04 Single Buoy Moorings Inc. Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
US8122914B2 (en) 2006-12-11 2012-02-28 Single Buoy Moorings Inc. Cryogenic transfer hose having a fibrous insulating layer and method of constructing such a transfer hose
EP2159468A1 (en) * 2006-12-11 2010-03-03 Single Buoy Moorings Inc. cryogenic transfer hose having a fibrous insulating layer
US20080203608A1 (en) * 2007-02-26 2008-08-28 Advanced Drainage Systems, Inc. Defined Ratio Dual-Wall Pipe Die
US20080203607A1 (en) * 2007-02-26 2008-08-28 Advanced Drainage Systems, Inc. Pipe Extrusion Die Flow Path Apparatus and Method
US8496460B2 (en) 2007-02-26 2013-07-30 Advanced Drainage Systems, Inc. Pipe extrusion die flow path apparatus and method
US7980841B2 (en) 2007-02-26 2011-07-19 Advanced Drainage Systems, Inc. Defined ratio dual-wall pipe die
US20080290538A1 (en) * 2007-05-23 2008-11-27 Biesenberger Jeffrey J Extruder ramp-up control system and method
US8820801B2 (en) 2007-11-16 2014-09-02 Advanced Drainage System, Inc. Multi-wall corrugated pipe couplings and methods
US8820800B2 (en) 2007-11-16 2014-09-02 Advanced Drainage Systems, Inc. Multi-wall corrugated pipe couplings and methods
US20090127853A1 (en) * 2007-11-16 2009-05-21 Sutton Gerald S Three-wall corrugated pipe couplings and methods
US20090127852A1 (en) * 2007-11-16 2009-05-21 Sutton Gerald S Three-Wall Corrugated Pipe Couplings and Methods
US20090200694A1 (en) * 2008-02-11 2009-08-13 Advanced Drainage Systems, Inc. Extrusion die vacuum seals and methods
US7988438B2 (en) 2008-02-11 2011-08-02 Advanced Drainage Systems, Inc. Extrusion die vacuum seals
US8550807B2 (en) 2008-05-28 2013-10-08 Advanced Drainage Systems, Inc. In-mold punch apparatus and methods
US20100089074A1 (en) * 2008-10-14 2010-04-15 Sutton Gerald S Apparatus and Method for Cooling an Outer Wall of Pipe
US8114324B2 (en) 2008-10-14 2012-02-14 Advanced Drainage Systems, Inc. Apparatus and method for pressing an outer wall of pipe
US9295801B2 (en) * 2010-05-25 2016-03-29 Fisher & Paykel Healthcare Limited Breathing tube
US20130112201A1 (en) * 2010-05-25 2013-05-09 Fisher & Paykel Healthcare Limited Breathing tube
US20170146175A1 (en) * 2014-07-10 2017-05-25 Witzenmann Gmbh Line assembly

Also Published As

Publication number Publication date Type
JPS498963B1 (en) 1974-03-01 grant
GB1257701A (en) 1971-12-22 application
FR2000268A1 (en) 1969-09-05 application
DE1901069C2 (en) 1982-02-18 grant
NL6900406A (en) 1969-07-17 application
BE726941A (en) 1969-07-15 grant
DE1901069A1 (en) 1969-09-04 application
NL160646C (en) 1979-11-15 grant

Similar Documents

Publication Publication Date Title
US3307590A (en) Pipe insulation
US3311133A (en) Flexible conduit
US3529071A (en) Superconducting cable for transmitting high electrical currents
US3473575A (en) Thermally insulated pipe
US2913009A (en) Internal and internal-external surface heat exchange tubing
US4515397A (en) Vacuum insulated conduit
US4068853A (en) Stuffing box seal
US5376758A (en) Stabilized flexible speaker cable with divided conductors
US2997519A (en) Multicoaxial line cables
US6855889B2 (en) Cable separator spline
US3522413A (en) Composite electrically heated tubing product
US3512581A (en) Cryogenic devices
US6711329B2 (en) Flame retardant tubing bundle
US3927247A (en) Shielded coaxial cable
US2882083A (en) Spirally wound gasket
US5393260A (en) Flexible double wall vent pipe
US3673315A (en) Shielded cable
US3435852A (en) Flexible ducting
US2578280A (en) Tubing bundle or cluster
US2804494A (en) High frequency transmission cable
US3814138A (en) Hose construction
US6454897B1 (en) Method for manufacturing a flexible duct
US6003561A (en) Flexible cryogenic conduit
US5617900A (en) Multilayer flexibility resilient thermal shielding sleeves
US6563045B2 (en) Lightweight shielded conduit