US2132189A - Flexible metal tube - Google Patents

Flexible metal tube Download PDF

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Publication number
US2132189A
US2132189A US147321A US14732137A US2132189A US 2132189 A US2132189 A US 2132189A US 147321 A US147321 A US 147321A US 14732137 A US14732137 A US 14732137A US 2132189 A US2132189 A US 2132189A
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United States
Prior art keywords
flexible metal
strip
metal tube
metal strip
layer
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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
US147321A
Inventor
Roemer Friedrich
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.)
Metallschlauch Fabrik Pforzheim Vorm HCH Witzenmann GmbH
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Pforzheim Metallschlauch
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands

Definitions

  • This invention relates to flexible metal tubing of spirally wound, profiled metal strip.
  • Such tubing ordinarily incorporates a special packing thread.
  • An object of the present invention is to provide new and improved flexible metal tubing in which packing thread is eliminated.
  • the entire width of the profiled metal strip is covered, either on one side only or on both sides, with elastic material such as rubber.
  • Fig. 1 represents a fragmentary, longitudinal- 5 edges of the flanges of the strip.
  • reference I denotes the profiled metal strip and 2 an elastic protective or insulating layer or covering of rubber or the like.
  • a protective or insulating layer 2 is arranged on each side of the metal strip I, so that the joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by an outer 5 and an inner elastic layer and therefore by a double layer.
  • the elastic layer 2 is disposed only on the inner side of the metal strip I and therefore only on the inner side of the flexible tube.
  • the joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by a single elastic layer.
  • Fig. 3 shows a form in which the elastic layer 45 is located on the outer side of the metal strip l and therefore on the outer side of the flexible tube.
  • the joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by a single elastic layer.
  • the metal strip 0 is covered on both sides and the covering 2 extends about the peripheral edges of the flanges on the strip.
  • care is taken that the metal flanges of the strip overlap to a sufli- 10 cient extent as clearly illustrated in the figure.
  • the covering consists of rubber or the like it prevents the transmission of electric current from the interior of the tubing to the outside, and when the fullest possible prevention of contact is desired the coating is preferably provided on the outside of the metal strip, or on both sides.
  • the side or sides provided with the. covering are protected against premature wear, oxidation or rusting and so on.
  • the outside covering protects polished furniture being damaged when the tubing is being moved about or manipulated.
  • I claim:-- I p j Flexible metal tubing of spirally wound 'metal strip having loosely interlocked flanges forming a joint between two adjacent windings, and a layer of elastic materialvextending over the whole width of atleast one surface of said strip and forming a complete covering for the corresponding surface of the tube, the portion of said layer lying between said flanges forming" 40 a seal therefor.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Description

Oct. 4, 1938. ROEMER I 2,132,189
FLEXIBLE METAL TUBE Filed June 9, 1937 fave/7mm E 0.? mar Patented Get. 4, 1938 UNITED STATES PATENT UFFICE' FLEXIBLE METAL rune Baden, Germany Application June 9, 1937, Serial No. 147,321
- In Germany May 9, 1934 2 Claims.
This invention relates to flexible metal tubing of spirally wound, profiled metal strip. Such tubing ordinarily incorporates a special packing thread.
An object of the present invention is to provide new and improved flexible metal tubing in which packing thread is eliminated. To this end, and in accordance with the invention, the entire width of the profiled metal strip is covered, either on one side only or on both sides, with elastic material such as rubber.
Typical embodiments of the invention are illustrated on the accompanying drawing.
Fig. 1 represents a fragmentary, longitudinal- 5 edges of the flanges of the strip.
In all the illustrated forms, reference I denotes the profiled metal strip and 2 an elastic protective or insulating layer or covering of rubber or the like.
In the example illustrated by Fig. 1 a protective or insulating layer 2 is arranged on each side of the metal strip I, so that the joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by an outer 5 and an inner elastic layer and therefore by a double layer.
In the form of the inventionillustrated by Fig: 2 the elastic layer 2 is disposed only on the inner side of the metal strip I and therefore only on the inner side of the flexible tube. The joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by a single elastic layer.
Fig. 3 shows a form in which the elastic layer 45 is located on the outer side of the metal strip l and therefore on the outer side of the flexible tube. Here, also, the joint between each pair of interlocking flanges of the two adjacent strip windings is sealed by a single elastic layer.
In the construction shown by Fig. 4, the metal strip 0 is covered on both sides and the covering 2 extends about the peripheral edges of the flanges on the strip. To prevent the windings of the metal strip from disengaging and the tube from being thereby opened, care is taken that the metal flanges of the strip overlap to a sufli- 10 cient extent as clearly illustrated in the figure.
It will be apparent that in every case a sealed joint between the windings of the metal strip is obtained, either by a double layer or single layer, without the necessity for any special interr'nediate layer in the form of a packing thread or the like.
As the covering consists of rubber or the like it prevents the transmission of electric current from the interior of the tubing to the outside, and when the fullest possible prevention of contact is desired the coating is preferably provided on the outside of the metal strip, or on both sides. The side or sides provided with the. covering are protected against premature wear, oxidation or rusting and so on. Moreover, when the-flexible metal tubing is employed in connection with domestic appliances, such as vacuum cleaners, the outside covering protects polished furniture being damaged when the tubing is being moved about or manipulated.
I claim:-- I p j 1. Flexible metal tubing of spirally wound 'metal strip having loosely interlocked flanges forming a joint between two adjacent windings, and a layer of elastic materialvextending over the whole width of atleast one surface of said strip and forming a complete covering for the corresponding surface of the tube, the portion of said layer lying between said flanges forming" 40 a seal therefor.
2. Flexible metal tubing as claimed in claim 1 characterized in that layers of said elastic material extend over both surfaces of the metal strip and the edges thereof.
FRIEDRICH ROEMER.
US147321A 1934-05-09 1937-06-09 Flexible metal tube Expired - Lifetime US2132189A (en)

Applications Claiming Priority (1)

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DE2132189X 1934-05-09

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913623A (en) * 1972-07-17 1975-10-21 Emil Siegwart Flexible corrugated tube
US5109889A (en) * 1988-12-27 1992-05-05 Shiro Kanao Pressure-resistant helical corrugated pipe
US5573038A (en) * 1988-12-27 1996-11-12 Kanao; Shiro Pressure-resistant helical corrugated pipe including a thin metal reinforcing plate
US20060208489A1 (en) * 2003-07-11 2006-09-21 Wallace Neil E Watertight joint
US20060283515A1 (en) * 2005-06-21 2006-12-21 Shigeki Kanao Synthetic resin pipe
WO2011036245A1 (en) * 2009-09-25 2011-03-31 Westfalia Metallschlauchtechnik Gmbh & Co. Kg Extendible coiled tube
US20160003381A1 (en) * 2013-03-04 2016-01-07 Contitech Rubber Industrial Ktf. Flexible metal pipe, method and apparatus for producing the same, and hose comprising the flexible metal pipe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913623A (en) * 1972-07-17 1975-10-21 Emil Siegwart Flexible corrugated tube
US5109889A (en) * 1988-12-27 1992-05-05 Shiro Kanao Pressure-resistant helical corrugated pipe
US5573038A (en) * 1988-12-27 1996-11-12 Kanao; Shiro Pressure-resistant helical corrugated pipe including a thin metal reinforcing plate
US20060208489A1 (en) * 2003-07-11 2006-09-21 Wallace Neil E Watertight joint
US20060283515A1 (en) * 2005-06-21 2006-12-21 Shigeki Kanao Synthetic resin pipe
US7156128B1 (en) * 2005-06-21 2007-01-02 Kanaflex Corporation Synthetic resin pipe
WO2011036245A1 (en) * 2009-09-25 2011-03-31 Westfalia Metallschlauchtechnik Gmbh & Co. Kg Extendible coiled tube
US20110232796A1 (en) * 2009-09-25 2011-09-29 WESTFALIA Metallschlauchtechnik GmbH & Co., KG Stretchable stripwound hose
US8973618B2 (en) 2009-09-25 2015-03-10 Westfalia Metallschlauchtechnik Gmbh & Co. Kg Stretchable stripwound hose
US20160003381A1 (en) * 2013-03-04 2016-01-07 Contitech Rubber Industrial Ktf. Flexible metal pipe, method and apparatus for producing the same, and hose comprising the flexible metal pipe

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