WO1994018046A1 - Line trolley - Google Patents

Line trolley Download PDF

Info

Publication number
WO1994018046A1
WO1994018046A1 PCT/NZ1994/000008 NZ9400008W WO9418046A1 WO 1994018046 A1 WO1994018046 A1 WO 1994018046A1 NZ 9400008 W NZ9400008 W NZ 9400008W WO 9418046 A1 WO9418046 A1 WO 9418046A1
Authority
WO
WIPO (PCT)
Prior art keywords
trolley
bucket
locking arm
conductor
base
Prior art date
Application number
PCT/NZ1994/000008
Other languages
French (fr)
Inventor
Bryan David Scott
Original Assignee
Powermark New Zealand Limited
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 Powermark New Zealand Limited filed Critical Powermark New Zealand Limited
Priority to AU59809/94A priority Critical patent/AU685773B2/en
Publication of WO1994018046A1 publication Critical patent/WO1994018046A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H9/00—Brakes characterised by or modified for their application to special railway systems or purposes
    • B61H9/02—Brakes characterised by or modified for their application to special railway systems or purposes for aerial, e.g. rope, railways
    • 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
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

Definitions

  • This invention relates to power transmission conductor maintenance and more particularly to equipment for use in the maintenance of extra high voltage power transmission conductors of the type supported by pylons.
  • An object of the invention is therefore to provide a trolley for use on power transmission conductors in either live or de-energised condition.
  • a further object of the invention is to provide a trolley which offers a useful alternative choice.
  • the invention provides a trolley including a foam sandwich construction bucket, the trolley comprising trolley wheels supported by support arms from the top edge of the bucket, the bucket including fixing plates for a brake mechanism adapted in use to contact at least one conductor on which the trolley wheels are mounted so that a user can control movement of the trolley on the conductor.
  • the foam sandwich construction bucket may be formed with a foam polyurethane or the like base covered on each side by a layer of fibreglass about 3.5mm in thickness.
  • Figure 1 shows a side view of an example of the trolley according to the invention
  • Figure 2 shows an end view of the trolley shown in Figure i;
  • Figure 3 shows a plan view of the trolley shown in Figures 1 and 2;
  • Figure 4 shows a side view of an assembled brake mechanism (left hand version) for the trolley.
  • Figure 5 shows a view in the direction of arrows V-V of the brake mechanism shown in Figure 4.
  • the trolley shown in the drawings is designed for use on extra high voltage power conductors of the type supported by pylons.
  • the trolley has a bucket 1 which is preferably of the shape shown.
  • the trolley is dimensioned to carry one or two operators and their equipment.
  • the bucket 1 at the interior of its base is about 750mm x 400mm.
  • the bucket 1 is of a foam sandwich construction with a base of about 60mm thick polyurethane or the like rigid foam 2.
  • On each side of the foam 2 is a layer 3 of about 3.5mm fibreglass.
  • At the ends 4 of the bucket 1 can be a lip or ledge 5 reinforced by a mild steel plate (not shown) sandwiched between the layers 3 of the fibreglass.
  • the sides 6 of the bucket 1 can be raised (as shown in Figure 2) above the level of the ledge 5 for safety reasons.
  • the overall height of the sides 6 can be about 900mm.
  • the sides 6 can be given rigidity along their upper edge 7 by providing a return 8 ( Figure 2) .
  • the reinforced ledge 5 provides a mounting base for a set of base plates 9 on which trolley support arms 10 are mounted.
  • the connections between the base plates 9 and their respective support arms 10 are via a knuckle joint 11 which allows the support arms 10 to move in and out in the direction of the arrows 12 ( Figure 2).
  • the trolley support arms 10 support the trolley wheels 13 which are mounted on suitable axles 14.
  • the inside ends of the axles 14 have mounted in association therewith securing brackets 15 ( Figure 2) which in use, are locked together.
  • the brackets 15 can be joined by a high strength alloy steel chain and karabiner assembly (not shown) when the trolley is supported on transmission conductors.
  • At each end of the bucket 1 can be a lifting eye 16 used for transporting the trolley or for connecting a safety cable (not shown) .
  • End walls 17 of the bucket 1 can have a pair of plates 18 pultruded from a fibreglass material and fixed into the moulded surface layer 3 of fibreglass.
  • the plates 18 act as mountings for a brake mechanism mountable in the trolley.
  • the brake mechanism is shown in detail in Figures 4 and 5.
  • Each brake mechanism is generally the same and the left hand assembly is shown by way of example.
  • the right hand brake assembly is a mirror image of the example shown which is indicated by arrow 20.
  • the assembly 20 consists of a handle 21 pivoted at 22 to a lug 23 on the ledge 5.
  • the handle 21 has a free end 24 which is used to move the handle in an arc generally indicated by arrow 25.
  • the handle 21 has a brake pad 26 bolted to it.
  • the brake pad 26 consists of angled plates 27 with a rubber or rubber composite pad 28.
  • the position of the handle 21 is controlled by hand and can be locked in the position shown by locking arms 28, 29.
  • the arm 28 is a length of channel pivoted to the plate 18 and connected at its other end to arm 29.
  • the arm 29 is pivotally connected to point 30 on the handle 21. In their locked position a tapered section 31 of the arm 29 abuts the bottom of the channel of the arm 28.
  • the metal parts of the unit are either aluminium, stainless steel or where mild steel is used it is sandblasted and protected by a suitable protective coating.
  • Any bolts or screws used to locate the parts together are preferably locked by the use of a suitable locking medium such as 'loctite' Trade Mark.
  • the base plates 9 at each end of the bucket 1 are linked by a metal conductor such as a stainless steel wire rope 19 so that in use, if the line trolley is mounted on live transmission conductors, the metal components of the trolley are at the same potential.
  • the trolley can be used in a similar manner to other trolleys and because of the insulated/isolated characteristics of the bucket 1 users thereof can work on conductors while live without the need for some other equipment which has been needed in the past, or at a minimum approach distance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Magnetic Heads (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Handcart (AREA)

Abstract

A power line trolley has a foam sandwich construction bucket (1, 2, 3) with trolley wheels (13) supported by support arms (10) from the top edge (5) of the bucket (1). The bucket (1) includes fixing plates (18) for a brake mechanism adapted in use to contact at least one conductor on which the trolley wheels (13) are mounted so that a user can control movement of the trolley on the conductor.

Description

LINE TROLLEY
This invention relates to power transmission conductor maintenance and more particularly to equipment for use in the maintenance of extra high voltage power transmission conductors of the type supported by pylons.
At present maintenance of power conductors is undertaken with great care and under strict maintenance procedures if the power lines or conductors are "live" or energised. Safety equipment is naturally required to afford protection to persons carrying out the work which can be extremely dangerous if accidents occur. Commonly work is carried out in New Zealand on de-energised conductors which interrupts continuity of supply.
If maintenance work is carried out on live conductors the operators must ensure that they do not get closer than the minimum approach distance to another voltage phase or to anything which will earth i.e. they must have a minimum and safe clearance from the ground, trees or pylons otherwise they can be electrocuted.
An object of the invention is therefore to provide a trolley for use on power transmission conductors in either live or de-energised condition.
A further object of the invention is to provide a trolley which offers a useful alternative choice.
Further aspects and advantages of the invention will become apparent from the following description which is given by way of example only. The invention provides a trolley including a foam sandwich construction bucket, the trolley comprising trolley wheels supported by support arms from the top edge of the bucket, the bucket including fixing plates for a brake mechanism adapted in use to contact at least one conductor on which the trolley wheels are mounted so that a user can control movement of the trolley on the conductor.
The foam sandwich construction bucket may be formed with a foam polyurethane or the like base covered on each side by a layer of fibreglass about 3.5mm in thickness.
Further aspects of the invention which should be considered in all its novel aspects will become apparent from the following description.
An example of the invention will now be described with reference to the accompanying drawings in which:
Figure 1 shows a side view of an example of the trolley according to the invention;
Figure 2 shows an end view of the trolley shown in Figure i;
Figure 3 shows a plan view of the trolley shown in Figures 1 and 2;
Figure 4 shows a side view of an assembled brake mechanism (left hand version) for the trolley; and
Figure 5 shows a view in the direction of arrows V-V of the brake mechanism shown in Figure 4. The trolley shown in the drawings is designed for use on extra high voltage power conductors of the type supported by pylons.
The trolley has a bucket 1 which is preferably of the shape shown. The trolley is dimensioned to carry one or two operators and their equipment. The bucket 1 at the interior of its base is about 750mm x 400mm. The bucket 1 is of a foam sandwich construction with a base of about 60mm thick polyurethane or the like rigid foam 2. On each side of the foam 2 is a layer 3 of about 3.5mm fibreglass.
At the ends 4 of the bucket 1 can be a lip or ledge 5 reinforced by a mild steel plate (not shown) sandwiched between the layers 3 of the fibreglass.
The sides 6 of the bucket 1 can be raised (as shown in Figure 2) above the level of the ledge 5 for safety reasons. The overall height of the sides 6 can be about 900mm. The sides 6 can be given rigidity along their upper edge 7 by providing a return 8 (Figure 2) .
The reinforced ledge 5 provides a mounting base for a set of base plates 9 on which trolley support arms 10 are mounted. The connections between the base plates 9 and their respective support arms 10 are via a knuckle joint 11 which allows the support arms 10 to move in and out in the direction of the arrows 12 (Figure 2). The trolley support arms 10 support the trolley wheels 13 which are mounted on suitable axles 14. The inside ends of the axles 14 have mounted in association therewith securing brackets 15 (Figure 2) which in use, are locked together.
The brackets 15 can be joined by a high strength alloy steel chain and karabiner assembly (not shown) when the trolley is supported on transmission conductors.
At each end of the bucket 1 can be a lifting eye 16 used for transporting the trolley or for connecting a safety cable (not shown) .
End walls 17 of the bucket 1 can have a pair of plates 18 pultruded from a fibreglass material and fixed into the moulded surface layer 3 of fibreglass. The plates 18 act as mountings for a brake mechanism mountable in the trolley. The brake mechanism is shown in detail in Figures 4 and 5.
Each brake mechanism is generally the same and the left hand assembly is shown by way of example. The right hand brake assembly is a mirror image of the example shown which is indicated by arrow 20. The assembly 20 consists of a handle 21 pivoted at 22 to a lug 23 on the ledge 5. The handle 21 has a free end 24 which is used to move the handle in an arc generally indicated by arrow 25. The handle 21 has a brake pad 26 bolted to it. The brake pad 26 consists of angled plates 27 with a rubber or rubber composite pad 28. The position of the handle 21 is controlled by hand and can be locked in the position shown by locking arms 28, 29. The arm 28 is a length of channel pivoted to the plate 18 and connected at its other end to arm 29. The arm 29 is pivotally connected to point 30 on the handle 21. In their locked position a tapered section 31 of the arm 29 abuts the bottom of the channel of the arm 28. The metal parts of the unit are either aluminium, stainless steel or where mild steel is used it is sandblasted and protected by a suitable protective coating.
Any bolts or screws used to locate the parts together are preferably locked by the use of a suitable locking medium such as 'loctite' Trade Mark.
The base plates 9 at each end of the bucket 1 are linked by a metal conductor such as a stainless steel wire rope 19 so that in use, if the line trolley is mounted on live transmission conductors, the metal components of the trolley are at the same potential.
In use the trolley can be used in a similar manner to other trolleys and because of the insulated/isolated characteristics of the bucket 1 users thereof can work on conductors while live without the need for some other equipment which has been needed in the past, or at a minimum approach distance.
Thus by this invention there is provided a line trolley for use on power transmission cable when live or otherwise.
A particular example of the invention has been described by way of example and it is envisaged that improvements and modifications can take place without departing from the scope of the appended claims.

Claims

CLAIMS :
1. A trolley including a foam sandwich construction bucket, the trolley comprising trolley wheels supported by support arms from the top edge of the bucket, the bucket including a fixing plate for a brake mechanism adapted in use to contact at least one conductor on which the trolley wheels are mounted in such a manner that a user can control movement of the trolley on the conductor.
2. A trolley as claimed in claim 1 in which the base of the bucket is about 750mm x 400mm.
3. A trolley as claimed in claim 1 or claim 2 in which the base of the bucket comprises polyurethane of about 60mm thickness.
4. A trolley as claimed in any one of claims 1 - 3 in which the foam layer is sandwiched between two layers of fibreglass of about 3.5mm thickness.
5. A trolley as claimed in any one of claims 1 - 4 comprising four trolley wheels, one at each corner of the bucket and each supported by a support arm.
6. A trolley as claimed in claim 5 further comprising a mounting base at each of its ends, the mounting bases adapted to support a set of base plates on which the support arms are mounted.
7. A trolley as claimed in claim 6 in which each support arms is connected to a base plate via a knuckle joint, thus allowing the support arms to move.
8. A trolley as claimed in any one of claims 1 - 7 in which each trolley wheel is mounted to its respective support arm by a suitable axle, secured thereto by a securing bracket, the bracket adapted to be joined by a high strength alloy steel chain and karabiner assembly when the trolley is supported on a transmission conductor.
9. A trolley as claimed in any one of claims 1 - 8 further comprising a lifting eye suitable for connection to a safety cable or for transportation of the trolley.
10. A trolley as claimed in any one of claims 1 - 9 further comprising a braking mechanism.
11. A trolley as claimed in claim 10 in which the braking mechanism includes a handle pivotally connected to a lug on a mounting base, the handle having a brake pad attached to it and wherein the handle is adapted to be adjusted by hand and to be locked in position if required.
12. A trolley as claimed in claim 11 in which a first locking arm is pivotally connected at one end to the fixed plate and connected at its other end to a second locking arm and wherein the second locking arm is pivotally connected at its second end to the handle.
13. A trolley as claimed in claim 12 in which the end of the second locking arm connected to the first locking arm is tapered and fits inside the first locking arm, abutting the bottom of the first locking arm.
14. A trolley as claimed in any one of claims 1 - 13 in which any metal parts are of stainless steel, aluminium or mild steel and where mild steel is used, are sandblasted and protected by a suitable protective coating.
15. A trolley as claimed in any one of claims 1-14 in which any bolts or screws used to connect parts together are locked by a suitable locking medium.
16. A trolley as claimed in claim 15 in which the locking medium is loctite®.
17. A trolley as claimed in claim 6 in which the base plates are linked by a metal conductor such that in use, if the trolley is mounted on a live transmission conductor, any metal components of the trolley are at the same potential.
18. A trolley as claimed in any preceding claim wherein the bucket is about 900mm in height.
19. A trolley substantially as herein described with reference to the drawings.
20. A trolley as claimed in claim 1 and substantially as herein described with reference to the drawings.
PCT/NZ1994/000008 1993-02-14 1994-02-11 Line trolley WO1994018046A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU59809/94A AU685773B2 (en) 1993-02-14 1994-02-11 Line trolley

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ244856 1993-02-14
NZ24485693 1993-02-14

Publications (1)

Publication Number Publication Date
WO1994018046A1 true WO1994018046A1 (en) 1994-08-18

Family

ID=19924155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1994/000008 WO1994018046A1 (en) 1993-02-14 1994-02-11 Line trolley

Country Status (2)

Country Link
AU (1) AU685773B2 (en)
WO (1) WO1994018046A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044873A1 (en) * 1996-05-20 1997-11-27 Bicc Public Limited Company Access trolley
US6494141B2 (en) 2000-02-22 2002-12-17 Hydro-Quebec Remotely operated vehicle for inspection and intervention of a live line
CN101964503A (en) * 2010-08-24 2011-02-02 自贡电业局 Improved paying-off pulley
CN105207125A (en) * 2015-11-02 2015-12-30 国网四川省电力公司成都供电公司 Pulley mechanism used in electrical installation process
DE202018105698U1 (en) * 2018-10-05 2020-01-09 Zasche handling GmbH crab frame

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU603032A2 (en) * 1976-04-15 1978-04-15 Московские Отделы Специального Конструкторско-Технологического Бюро Треста "Электросетьизоляция" Carriage for moving along split-phase wires
SU1026218A1 (en) * 1981-01-21 1983-06-30 Производственное Объединение По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Split-phase wire travelling grab
SU1092635A1 (en) * 1983-02-11 1984-05-15 Проектно-Конструкторское Бюро Главэнергостроймеханизации Trolley for displacement of split phase on wires
SU1241340A1 (en) * 1983-03-05 1986-06-30 Levin Boris A Device for moving carriage for servicing aerial electric power line along wires
SU1309137A2 (en) * 1983-09-08 1987-05-07 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Device for moving trolley for servicing aerial power line along wires
SU1339707A2 (en) * 1985-12-25 1987-09-23 Производственное Объединение По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Trolley for moving along wire of split phase of overhead power transmission line
SU1390677A1 (en) * 1986-01-30 1988-04-23 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Device for moving a carriage over the lines of a suspension power transmission line for maintenance
EP0265354A1 (en) * 1986-10-23 1988-04-27 Denis Creissels S.A. Rescue vehicle, especially for cableway installations
JPS63161804A (en) * 1986-12-24 1988-07-05 四国電力株式会社 Method of attaching working machine on lines
JPS63234814A (en) * 1987-03-20 1988-09-30 藤井電工株式会社 Method of fitting snow-proof ring
SU1504698A1 (en) * 1986-05-26 1989-08-30 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Arrangement for moving trolley for maintenance of overhead power lines along wires
JPH01321805A (en) * 1988-06-21 1989-12-27 Kansai Electric Power Co Inc:The Suspender
SU1584016A1 (en) * 1988-09-13 1990-08-07 Производственное Объединение По Наладке, Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Trolley for moving along wires of split phase of aerial power transmission line

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU603032A2 (en) * 1976-04-15 1978-04-15 Московские Отделы Специального Конструкторско-Технологического Бюро Треста "Электросетьизоляция" Carriage for moving along split-phase wires
SU1026218A1 (en) * 1981-01-21 1983-06-30 Производственное Объединение По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Split-phase wire travelling grab
SU1092635A1 (en) * 1983-02-11 1984-05-15 Проектно-Конструкторское Бюро Главэнергостроймеханизации Trolley for displacement of split phase on wires
SU1241340A1 (en) * 1983-03-05 1986-06-30 Levin Boris A Device for moving carriage for servicing aerial electric power line along wires
SU1309137A2 (en) * 1983-09-08 1987-05-07 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Device for moving trolley for servicing aerial power line along wires
SU1339707A2 (en) * 1985-12-25 1987-09-23 Производственное Объединение По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Trolley for moving along wire of split phase of overhead power transmission line
SU1390677A1 (en) * 1986-01-30 1988-04-23 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Device for moving a carriage over the lines of a suspension power transmission line for maintenance
SU1504698A1 (en) * 1986-05-26 1989-08-30 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Arrangement for moving trolley for maintenance of overhead power lines along wires
EP0265354A1 (en) * 1986-10-23 1988-04-27 Denis Creissels S.A. Rescue vehicle, especially for cableway installations
JPS63161804A (en) * 1986-12-24 1988-07-05 四国電力株式会社 Method of attaching working machine on lines
JPS63234814A (en) * 1987-03-20 1988-09-30 藤井電工株式会社 Method of fitting snow-proof ring
JPH01321805A (en) * 1988-06-21 1989-12-27 Kansai Electric Power Co Inc:The Suspender
SU1584016A1 (en) * 1988-09-13 1990-08-07 Производственное Объединение По Наладке, Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" Trolley for moving along wires of split phase of aerial power transmission line

Non-Patent Citations (14)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 1428B/10, Class R51; & SU,A,603 032 (MOSC ELEKTROSETIZOL), 23 March 1978. *
DERWENT ABSTRACT, Accession No. 84-093646/15, Class X12; & SU,A,1 026 218 (SOYUZTEKHENERGO ASS), 30 June 1983. *
DERWENT ABSTRACT, Accession No. 85-010555/02, Class X12; & SU,A,1 092 635 (GLAVENERGOSTROIMEKH), 15 May 1984. *
DERWENT ABSTRACT, Accession No. 87-049297/07, Class X12; & SU,A,1 241 340 (LEVIN B A), 30 June 1986. *
DERWENT ABSTRACT, Accession No. 87-354425/50, Class X12; & SU,A,1 309 137 (ENERGOMEKHANIZATSIY), 7 May 1987. *
DERWENT ABSTRACT, Accession No. 88-117808/17, Class X12; & SU,A,1 339 707 (SOYUZTEKHENERGO COM), 23 September 1987. *
DERWENT ABSTRACT, Accession No. 88-22544/32, Class X12; & JP,A,63 161 804 (SHIKOKU DENRYOKU K K), 5 July 1988. *
DERWENT ABSTRACT, Accession No. 88-306484/43, Class X12; & SU,A,1 390 677 (ENERGOMEKHANIZATSIY), 23 April 1988. *
DERWENT ABSTRACT, Accession No. 88-318579/45, Class X12; & JP,A,63 234 814 (FUJII DENKO K K), 30 September 1988. *
DERWENT ABSTRACT, Accession No. 90-074188/10, Class X12; & SU,A,1 504 698 (ENERGOMEKHANIZATSIY), 30 August 1989. *
DERWENT ABSTRACT, Accession No. 91-107863/15, Class X12; & SU,A,1 584 016 (SOYUZTEKHENERGO POW), 7 August 1990. *
MODERN PLASTICS ENCYCLOPEDIA, issued mid-October 1991, Volume 68, Number 11, McGraw Hill Inc., pages 260-287. *
PATENT ABSTRACTS OF JAPAN, E-901, page 161; & JP,A,1 321 805 (KANSAI ELECTRIC POWER CO INC), 27 December 1989. *
PLEASURE BOATING, RIGBY LIMITED, 1977, pages 77 to 79. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997044873A1 (en) * 1996-05-20 1997-11-27 Bicc Public Limited Company Access trolley
US6494141B2 (en) 2000-02-22 2002-12-17 Hydro-Quebec Remotely operated vehicle for inspection and intervention of a live line
CN101964503A (en) * 2010-08-24 2011-02-02 自贡电业局 Improved paying-off pulley
CN105207125A (en) * 2015-11-02 2015-12-30 国网四川省电力公司成都供电公司 Pulley mechanism used in electrical installation process
DE202018105698U1 (en) * 2018-10-05 2020-01-09 Zasche handling GmbH crab frame

Also Published As

Publication number Publication date
AU685773B2 (en) 1998-01-29
AU5980994A (en) 1994-08-29

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