GB2242000A - Improvements relating to flexible tubing - Google Patents

Improvements relating to flexible tubing Download PDF

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Publication number
GB2242000A
GB2242000A GB9006041A GB9006041A GB2242000A GB 2242000 A GB2242000 A GB 2242000A GB 9006041 A GB9006041 A GB 9006041A GB 9006041 A GB9006041 A GB 9006041A GB 2242000 A GB2242000 A GB 2242000A
Authority
GB
United Kingdom
Prior art keywords
tube
strip
spirals
sub
length
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.)
Granted
Application number
GB9006041A
Other versions
GB9006041D0 (en
GB2242000B (en
Inventor
Raymond Frederick Margrie
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.)
Critchley Group Ltd
Original Assignee
Critchley Ltd
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
Application filed by Critchley Ltd filed Critical Critchley Ltd
Priority to GB9006041A priority Critical patent/GB2242000B/en
Publication of GB9006041D0 publication Critical patent/GB9006041D0/en
Publication of GB2242000A publication Critical patent/GB2242000A/en
Application granted granted Critical
Publication of GB2242000B publication Critical patent/GB2242000B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F16L11/24—Hoses, i.e. flexible pipes wound from strips or bands
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0475—Tubings, i.e. having a closed section formed by a succession of articulated units

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Indoor Wiring (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A flexible tube is created as a tightly-formed spirally-extending strip. This strip is then cut along its centre line 1 to create two separate interlocked sub-spirals 2 and 3. By this means the flexibility of the tube is increased. Furthermore the sub-spirals 2 and 3 may be unwound from one another to form the open spiral branches 2A and 3A respectively, thus creating a branched tubing member e.g. to hold electrical cables. <IMAGE>

Description

Improvements Relating to Flexible Tubing It is an object of this invention to enhance the flexibility of a spirally-defined tube. Tubing of this nature is particularly suited for use to act as a binding for electrical cables as it can be bent to follow a desired path. Also it can be stretched temporarily to create gaps into which the cables can be pressed in a progressive manner.
According to the present invention there is provided a flexible tube comprising a tightly-formed spirallyextending strip, the strip being cut along a line or lines along its length to create a plurality of subspirals interlocked with one another.
The additional cut or cuts substantially enhance the flexibility of the tube. Furthermore the sub-spirals can be fully unwound from one another to create an open spiral tube whose flexibility is still further enhanced.
In a particularly advantageous arrangement the subspirals are unwound from one another along part of their length only to create a branched tubing member.
The invention further extends to a method of forming a flexible tube comprising a plurality of interlocked spirals wherein a tightly formed spirally-extending strip is created and the strip is then cut along its length to define a plurality of interlocked sub-spirals.
The spirally-extending strip may be formed by cutting a tube along a spiral path down the length of the tube. Alternatively a flat strip may be wound along a spiral path about a former of circular cross-section and the strip is then heat-set to conform to the shape of the former.
The invention may be performed in various ways but one preferred embodiment will now be described with reference to the accompanying drawing which illustrates a branched trunking tube member.
A flexible tube is created as a tightly-formed spirally-extending strip. This strip is then cut along its centre line 1 to create two separate interlocked sub-spirals 2 and 3. By this means the flexibility of the tube is increased. Furthermore the sub-spirals 2 and 3 may be unwound from one another to form the open spiral branches 2A and 3A respectively, thus creating a branched trunking member. Electrical cables fed through the main limb 4 can then be distributed in differing directions through the branches 2A and 3A. It will be appreciated that the spirally-extending strip (or a section thereof) could be subjected to two or more cuts along the length of the strip, thus enabling multiple branching or sub-branching to be created.

Claims (7)

CLAIMB
1. A flexible tube comprising a tightly-formed spirally-extending strip, the strip being cut along a line or lines along its length to create a plurality of sub-spirals interlocked with one another.
2. A tube according to Claim l, wherein the subspirals are fully unwound from one another to create an open spiral tube whose flexibility is still further enhanced.
3. A tube according to Claim 1, wherein the sub-spirals are unwound from one another along part of their length only to create a branched tubing member.
4. A method of forming a flexible tube comprising a plurality of interlocked spirals wherein a tightly formed spirally-extending strip is created and the strip is then cut along its length to define a plurality of interlocked sub-spirals.
5. A method according to claim 4, wherein the tube is cut along a spiral path down the length of the tube.
6. A method according to claim 4, wherein a flat strip is wound along a spiral path about a former of circular cross-section, the strip is then heat set to conform to the shape of the former.
7. A flexible tube or a method of forming such a tube and substantially as hereinbefore described with reference to the accompanying drawings.
GB9006041A 1990-03-16 1990-03-16 Improvements relating to flexible tubing Expired - Lifetime GB2242000B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9006041A GB2242000B (en) 1990-03-16 1990-03-16 Improvements relating to flexible tubing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9006041A GB2242000B (en) 1990-03-16 1990-03-16 Improvements relating to flexible tubing

Publications (3)

Publication Number Publication Date
GB9006041D0 GB9006041D0 (en) 1990-05-09
GB2242000A true GB2242000A (en) 1991-09-18
GB2242000B GB2242000B (en) 1993-05-19

Family

ID=10672789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9006041A Expired - Lifetime GB2242000B (en) 1990-03-16 1990-03-16 Improvements relating to flexible tubing

Country Status (1)

Country Link
GB (1) GB2242000B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737277A1 (en) * 1995-07-27 1997-01-31 Conducto Silencer sleeving of wound flexible coils slid over hydraulic piping in vehicle hydraulic systems - includes leakage path for tuning being produced whilst sleeving is formed

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566679A (en) * 1943-11-19 1945-01-09 Crabtree & Co Ltd J A Improvements in and connected with supports for electric cables and the like
GB885165A (en) * 1958-11-26 1961-12-20 Okonite Co Electric cable systems
GB959160A (en) * 1962-02-20 1964-05-27 Stewart Warner Corp Flexible shaft assembly
GB1081339A (en) * 1965-04-28 1967-08-31 Angus George Co Ltd Improvements in flexible ducting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566679A (en) * 1943-11-19 1945-01-09 Crabtree & Co Ltd J A Improvements in and connected with supports for electric cables and the like
GB885165A (en) * 1958-11-26 1961-12-20 Okonite Co Electric cable systems
GB959160A (en) * 1962-02-20 1964-05-27 Stewart Warner Corp Flexible shaft assembly
GB1081339A (en) * 1965-04-28 1967-08-31 Angus George Co Ltd Improvements in flexible ducting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737277A1 (en) * 1995-07-27 1997-01-31 Conducto Silencer sleeving of wound flexible coils slid over hydraulic piping in vehicle hydraulic systems - includes leakage path for tuning being produced whilst sleeving is formed

Also Published As

Publication number Publication date
GB9006041D0 (en) 1990-05-09
GB2242000B (en) 1993-05-19

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20100315