WO1984004291A1 - Improvements in or relating to winches - Google Patents

Improvements in or relating to winches Download PDF

Info

Publication number
WO1984004291A1
WO1984004291A1 PCT/GB1984/000144 GB8400144W WO8404291A1 WO 1984004291 A1 WO1984004291 A1 WO 1984004291A1 GB 8400144 W GB8400144 W GB 8400144W WO 8404291 A1 WO8404291 A1 WO 8404291A1
Authority
WO
WIPO (PCT)
Prior art keywords
winch
capstan
winch according
friction
cable
Prior art date
Application number
PCT/GB1984/000144
Other languages
French (fr)
Inventor
John Thomas Hird Webb
Original Assignee
Webb John Thomas H
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 Webb John Thomas H filed Critical Webb John Thomas H
Priority to BR8406815A priority Critical patent/BR8406815A/en
Priority to DE8484901789T priority patent/DE3469433D1/en
Priority to AT84901789T priority patent/ATE32598T1/en
Priority to IN314/MAS/84A priority patent/IN160709B/en
Publication of WO1984004291A1 publication Critical patent/WO1984004291A1/en
Priority to FI845058A priority patent/FI78053C/en
Priority to DK627384A priority patent/DK153021B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7405—Capstans having two or more drums providing tractive force

Definitions

  • THIS INVENTION relates to improvements in or relating to winches.
  • Winches have been proposed, and are described and illustrated in U.S. Patent Specification Nos. 4,274,606 and 4 ⁇ 230,306, in which a tailing means is provided at the tail end of a rotatable drum.
  • the tailing means is intended to receive only a single turn of rope or cable and comprises a circumferential groove and/or a high friction material.
  • An increase in tension in the turn of rope received by the tailing means has the effect of increasing the force with which the same is gripped by the tailing means.
  • the tailing means holds the tail end of rope in position so that, on the one hand, an increase in the tension applied to the load end of the rope will not cause the turns of rope to slip around the drum and, on the other hand, the tail end of the rope will not become slack and, possibly, foul the line.
  • U.S. Patent Specification. No. 4,272,606 stresses that the area of increased friction must only be provided at the tail end of the drum, because a number of turns of rope adjacent the tail end might otherwise become slack. Thus, in these previously proposed winches, the rope or cable and the cable bearing surface are subjected to uneven frictional wear.
  • U.K. Patent Specification No. 1,599,521 describes a dual axis quadruple capstan winch in which cable tension is overcome by providing a large number of grooves so that a large number of turns of cable are borne by the winch.
  • the driving capstans of the winch are disposed on more than one axis, it is difficult correctly to balance the torque applied by the load about the two axes.
  • This invention provides ⁇ winch comprising ⁇ rot ⁇ t ⁇ ble bearing surface for a cable, wherein the friction between the surface and a given cable material at a given cable tension varies continuously, or sfepwise in a plurality of steps, along a rotational axis.
  • the winch includes a capstan having a surface the coefficient of friction of which increases along the rotation axis of the capstan. Additionally, or alternatively, the winch comprises a capstan provided with a plurality of circumferential grooves, the cable bearing surface area of each groove being different.
  • the friction acting between the cable and the capstan can be kept at substantially the same level by increasing the coefficient of friction and/or by decreasing the effective contact area (and thus increasing the pressure) between the cable and the capstan.
  • the circumferential grooves are worn at substantially the same rate, facilitating maintenance.
  • the present invention enables the provision of a winch fn which cable tension is overcome in relatively few turns of cable, so that a single axis twin capstan winch, which has not been previously proposed, becomes feasible.
  • the present invention also provides a capstan winch in which the driving capstans of the winch are disposed on a single axis and comprise first and second capstans.
  • the first and second capstans are drivable in contrarotat ⁇ on, for example by means of an epicyclic gear train, and a brake ⁇ s provided for securing the first and second capstans against rotation with respect to each other, so that they act as a single fixed capstan.
  • the first and second capstans can continue to support a load even whilst parts of the driving mechanism are removed for inspection or repair.
  • Figure 1 is a schematic side elevational view of a single-axis twin capstan winch in accordance with the invention
  • Figure 2 illustrates the path followed by a cable guided by the twin capstan winch of Figure 1 .
  • Figure 3 is a cross-sectional view taken along the line III- III of Figure 1.
  • Figure 1 shows a twin capstan winch comprising a first, single groove, capstan 1 and a second capstan 2, sharing a common rotation axis, and a plurality of sheaves or grooved pulleys 3.
  • three sheaves 3 are rotatably mounted on a shaft 4 which is parallel to the common rotation axis of the first and second capstans 1, 2.
  • a fourth sheave 3 is rotatably mounted on a shaft 5 which is slightly offset from that axis to facilitate passing cable over the fourth sheave 3 and the single groove capstan 1.
  • the capstans 1, 2 are adapted to be driven in rotation by means of a motor 6, a sun gear 7 fixed to a drive shaft of the motor 6, a planet gear 8 rotatably mounted on an integral shaft 9 of the second capstan 2 and an internal gear 10 of the first capstan 1.
  • a brake (not shown) is also provided for preventing relative rotation of the capstans 1, 2 if desired.
  • the second capstan 2 is provided with three circumferential grooves 1 1 which are offset along the capstan rotation axis relative to the grooves of the three sheaves 3 on the parallel shaft 4 by half a groove's width.
  • the circumferential grooves 1 1 comprise a high friction material and the coefficient of friction increases from the high tension (load) end to the low tension (tail) end of the second capstan 2.
  • Preferred high friction materials include Silumin, which is a high silicon content aluminium such as AL20 with more than 12% silicon content, and, for use in potentially corrosive environments, high friction polymers such as polyurethanes, polypropylenes and Ka ⁇ tex, which is a polyvinylchloride based material. "Silumin” and “Kautex” are Trade Names.
  • each groove comprises alternating areas of Kautex and Silumin, the former providing the high friction component and the latter serving to support the cable.
  • the coefficient of friction of at least some of the surface of the second capstan 2 for a steel cable should preferably be significantly greater than that of steel on steel.
  • the density decreases exponentially from the high tension (load) end to the low tension (tail) end of the second capstan 2.
  • the widths of the grooves may also be varied (not shown) so as to vary the pressure between the cable and the surface of each groove at a given cable tension.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Pulleys (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Ropes Or Cables (AREA)
  • Air Bags (AREA)
  • Earth Drilling (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Superheterodyne Receivers (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Chain Conveyers (AREA)
  • Insulated Conductors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Braking Arrangements (AREA)
  • Soil Working Implements (AREA)
  • Window Of Vehicle (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Handcart (AREA)
  • Moulding By Coating Moulds (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Jib Cranes (AREA)
  • Friction Gearing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)

Abstract

A winch comprises a capstan (2) provided with a plurality of circumferential grooves (11). The grooves (11) comprise a high friction material and the density of the material of each groove (11) is different, so that the coefficient of friction of the cable bearing surface increases from the load end to the tail end of the capstan (2).

Description

"improvements in or relating to winches"
THIS INVENTION relates to improvements in or relating to winches.
Winches have been proposed, and are described and illustrated in U.S. Patent Specification Nos. 4,274,606 and 4^230,306, in which a tailing means is provided at the tail end of a rotatable drum. The tailing means is intended to receive only a single turn of rope or cable and comprises a circumferential groove and/or a high friction material. An increase in tension in the turn of rope received by the tailing means has the effect of increasing the force with which the same is gripped by the tailing means. The tailing means holds the tail end of rope in position so that, on the one hand, an increase in the tension applied to the load end of the rope will not cause the turns of rope to slip around the drum and, on the other hand, the tail end of the rope will not become slack and, possibly, foul the line. U.S. Patent Specification. No. 4,272,606 stresses that the area of increased friction must only be provided at the tail end of the drum, because a number of turns of rope adjacent the tail end might otherwise become slack. Thus, in these previously proposed winches, the rope or cable and the cable bearing surface are subjected to uneven frictional wear.
U.K. Patent Specification No. 1,599,521 describes a dual axis quadruple capstan winch in which cable tension is overcome by providing a large number of grooves so that a large number of turns of cable are borne by the winch. However, because the driving capstans of the winch are disposed on more than one axis, it is difficult correctly to balance the torque applied by the load about the two axes.
It is an object of the present invention to enable the provision of a winch whereby the above disadvantages may be overcome or at least miligated. This invention provides α winch comprising α rotαtσble bearing surface for a cable, wherein the friction between the surface and a given cable material at a given cable tension varies continuously, or sfepwise in a plurality of steps, along a rotational axis.
Advantageously, the winch includes a capstan having a surface the coefficient of friction of which increases along the rotation axis of the capstan. Additionally, or alternatively, the winch comprises a capstan provided with a plurality of circumferential grooves, the cable bearing surface area of each groove being different.
Thus, as the tension in the cable decreases, the friction acting between the cable and the capstan can be kept at substantially the same level by increasing the coefficient of friction and/or by decreasing the effective contact area (and thus increasing the pressure) between the cable and the capstan. As a result, the circumferential grooves are worn at substantially the same rate, facilitating maintenance. Also, whilst in the absence of the features of the present invention the cable tension would decrease very gradually as the number of turns of cable increases, the present invention enables the provision of a winch fn which cable tension is overcome in relatively few turns of cable, so that a single axis twin capstan winch, which has not been previously proposed, becomes feasible.
Accordingly, the present invention also provides a capstan winch in which the driving capstans of the winch are disposed on a single axis and comprise first and second capstans. Preferably, the first and second capstans are drivable in contrarotatϊon, for example by means of an epicyclic gear train, and a brake ϊs provided for securing the first and second capstans against rotation with respect to each other, so that they act as a single fixed capstan. When fixed in this way the first and second capstans can continue to support a load even whilst parts of the driving mechanism are removed for inspection or repair.
For a better understanding of the present invention, and to show how the same may be put into effect, reference will now be made, by way of example, to the accompanying drawings, in which: Figure 1 is a schematic side elevational view of a single-axis twin capstan winch in accordance with the invention,
Figure 2 illustrates the path followed by a cable guided by the twin capstan winch of Figure 1 , and
Figure 3 is a cross-sectional view taken along the line III- III of Figure 1.
Referring now to the drawings, Figure 1 shows a twin capstan winch comprising a first, single groove, capstan 1 and a second capstan 2, sharing a common rotation axis, and a plurality of sheaves or grooved pulleys 3. As can be seen in Figure 3, three sheaves 3 are rotatably mounted on a shaft 4 which is parallel to the common rotation axis of the first and second capstans 1, 2.
Also, a fourth sheave 3 is rotatably mounted on a shaft 5 which is slightly offset from that axis to facilitate passing cable over the fourth sheave 3 and the single groove capstan 1. The capstans 1, 2 are adapted to be driven in rotation by means of a motor 6, a sun gear 7 fixed to a drive shaft of the motor 6, a planet gear 8 rotatably mounted on an integral shaft 9 of the second capstan 2 and an internal gear 10 of the first capstan 1. A brake (not shown) is also provided for preventing relative rotation of the capstans 1, 2 if desired.
The second capstan 2 is provided with three circumferential grooves 1 1 which are offset along the capstan rotation axis relative to the grooves of the three sheaves 3 on the parallel shaft 4 by half a groove's width. The circumferential grooves 1 1 comprise a high friction material and the coefficient of friction increases from the high tension (load) end to the low tension (tail) end of the second capstan 2.
Preferred high friction materials include Silumin, which is a high silicon content aluminium such as AL20 with more than 12% silicon content, and, for use in potentially corrosive environments, high friction polymers such as polyurethanes, polypropylenes and Kaυtex, which is a polyvinylchloride based material. "Silumin" and "Kautex" are Trade Names. In a preferred arrangement, each groove comprises alternating areas of Kautex and Silumin, the former providing the high friction component and the latter serving to support the cable. The coefficient of friction of at least some of the surface of the second capstan 2 for a steel cable should preferably be significantly greater than that of steel on steel. It has been found that, for some materials at least, such as polyurethane, a relationship exists between the density of the material and its coefficient of friction for a given cable material. Accordingly, in one arrangement the density decreases exponentially from the high tension (load) end to the low tension (tail) end of the second capstan 2. The widths of the grooves may also be varied (not shown) so as to vary the pressure between the cable and the surface of each groove at a given cable tension.
During use, tension in the cable guided by the winch is overcome by friction between the cable and the capstans, so that the cable at the tail end of the winch is almost completely slack. At least 40%, and as much as 50%, of the cable tension is taken up by the first capstan 1 , about which the degree of wrap is between 250° and 280°, usually about 270°. The friction would normally decrease gradually from the load end to the tail end of the second capstan 2. However, because the coefficient of friction between the grooves 1 1 and the cable increases from the load end to the tail end of the second capstan 2, the frictional force is spread evenly over the second capstan 2, as a result of which the cable, and the grooves N , are not subjected to unduly high frictional forces in any one place. At the same time, sufficient tension is maintained in the last few turns of cable adjacent the tail end to prevent the same from becoming slack.

Claims

1. A winch comprising a rotatable bearing surface for a cable, wherein the friction between the surface and a given cable material at a given cable tension varies continuously, or stepwise in a plurality of steps, along a rotational axis.
2. A winch according to Claim 1, wherein the coefficient of friction of the surface for a given cable material increases gradually, or stepwise in a plurality of steps, along the rotational axis.
3. A winch according to Claim 2, wherein the surface comprises a high friction material.
4. A winch according to Claim 3, wherein the coefficient of friction of the high friction material on steel is substantially greater than the coefficient of friction of steel on steel.
5. A winch according to Claim 3, wherein the high friction material comprises a high friction polymer.
6. A winch according to Claim 5, wherein the high friction polymer is a polyurethane, a polypropylene or a polyvinylchloride.
7. A winch according to Claim 3, wherein the high friction material comprises silicon enriched aluminium.
8. A winch according to Claim 2, which comprises a capstan provided with a plurality of circumferential grooves, the coefficient of friction of the surface of each groove being different.
9. A winch according to Claim 2, wherein the surface comprises material the density of which decreases. exponentially along the rotational axis.
10. A winch according to Claim 1 , which comprises a capstan provided with a plurality of circumferential grooves, the cable bearing surface area of each groove being different.
11. A winch according to any one of the preceding claims, which is a single axis twin capstan winch.
12. A capstan winch in which the driving capstans of the winch are disposed on a single axis and comprise first and second capstans.
13. A capstan winch according to Claim 12, wherein the first and second capstans are drivable in rotation, and linked to each other, by means of an epϊcyclϊc gear train.
14. A capstan winch according to Claim 12 or 13, which further comprises means for securing the first and second capstans against rotation with respect to each other.
PCT/GB1984/000144 1983-04-27 1984-04-27 Improvements in or relating to winches WO1984004291A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR8406815A BR8406815A (en) 1983-04-27 1984-04-27 WINCH WITH ROTATING CABLE SUPPORT SURFACE AND WINDOW WINCH
DE8484901789T DE3469433D1 (en) 1983-04-27 1984-04-27 Improvements in or relating to winches
AT84901789T ATE32598T1 (en) 1983-04-27 1984-04-27 IMPROVEMENTS TO WINCHES.
IN314/MAS/84A IN160709B (en) 1983-04-27 1984-04-30
FI845058A FI78053C (en) 1983-04-27 1984-12-20 VINSCH.
DK627384A DK153021B (en) 1983-04-27 1984-12-21 GAME

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838311454A GB8311454D0 (en) 1983-04-27 1983-04-27 Winches

Publications (1)

Publication Number Publication Date
WO1984004291A1 true WO1984004291A1 (en) 1984-11-08

Family

ID=10541768

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1984/000144 WO1984004291A1 (en) 1983-04-27 1984-04-27 Improvements in or relating to winches

Country Status (19)

Country Link
EP (1) EP0150187B1 (en)
JP (1) JPS60501156A (en)
AT (1) ATE32598T1 (en)
AU (1) AU588217B2 (en)
BR (1) BR8406815A (en)
CA (1) CA1246540A (en)
DD (1) DD218340A5 (en)
DE (1) DE3469433D1 (en)
DK (1) DK153021B (en)
FI (1) FI78053C (en)
GB (2) GB8311454D0 (en)
HU (1) HU195162B (en)
IL (1) IL71687A (en)
IN (1) IN160709B (en)
IT (1) IT1174524B (en)
NO (1) NO844918L (en)
RO (1) RO94168B (en)
WO (1) WO1984004291A1 (en)
ZA (1) ZA843155B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102826475A (en) * 2012-09-10 2012-12-19 江苏科技大学 Horizontal type inclined cable-tension attenuating winch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR22347A (en) * 1984-10-30 1987-02-23 Webb John Thomas H DEVELOPMENT OF THE CRANES OR WITH THE CRANES
GB9713669D0 (en) * 1997-06-27 1997-09-03 Lewmar Marine Ltd Winch
NO973054L (en) * 1997-07-01 1999-01-04 Huse As I P Drawing winch device

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389878A (en) * 1943-12-31 1945-11-27 American Steel & Wire Co Strand engaging drum
US2685801A (en) * 1952-02-28 1954-08-10 Tishman David Sheave tread
FR1105165A (en) * 1952-10-17 1955-11-28 Entpr S Soc Gen Winch improvements
GB868968A (en) * 1957-04-23 1961-05-25 Gerald Alger Monroe Petersen Apparatus for hauling in or hauling in and paying out transmission cable
DE1221413B (en) * 1961-10-25 1966-07-21 Nautec Corp Cable winch with two traction sheaves and a storage drum
FR1465703A (en) * 1965-12-03 1967-01-13 Chantiers De Nantes Atel Operating and storage device for cables, trailers and the like
US3776519A (en) * 1972-01-11 1973-12-04 Fairey Winches Ltd Cable handling apparatus
FR2377962A1 (en) * 1977-01-20 1978-08-18 Wharton Engs Elstree Ltd MULTI-PULLEY TRACTION SYSTEM
US4230306A (en) * 1978-02-21 1980-10-28 Barlow Marine Limited Self-tailing winch
US4274606A (en) * 1979-08-30 1981-06-23 Hans Bernwall Self-tailing winch
DE3043125A1 (en) * 1980-11-15 1982-07-01 Aktien-Gesellschaft Weser, 2800 Bremen Research ship friction windlass - has pulleys with grooves accommodating fishing net ropes

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389878A (en) * 1943-12-31 1945-11-27 American Steel & Wire Co Strand engaging drum
US2685801A (en) * 1952-02-28 1954-08-10 Tishman David Sheave tread
FR1105165A (en) * 1952-10-17 1955-11-28 Entpr S Soc Gen Winch improvements
GB868968A (en) * 1957-04-23 1961-05-25 Gerald Alger Monroe Petersen Apparatus for hauling in or hauling in and paying out transmission cable
DE1221413B (en) * 1961-10-25 1966-07-21 Nautec Corp Cable winch with two traction sheaves and a storage drum
FR1465703A (en) * 1965-12-03 1967-01-13 Chantiers De Nantes Atel Operating and storage device for cables, trailers and the like
US3776519A (en) * 1972-01-11 1973-12-04 Fairey Winches Ltd Cable handling apparatus
FR2377962A1 (en) * 1977-01-20 1978-08-18 Wharton Engs Elstree Ltd MULTI-PULLEY TRACTION SYSTEM
US4230306A (en) * 1978-02-21 1980-10-28 Barlow Marine Limited Self-tailing winch
US4274606A (en) * 1979-08-30 1981-06-23 Hans Bernwall Self-tailing winch
DE3043125A1 (en) * 1980-11-15 1982-07-01 Aktien-Gesellschaft Weser, 2800 Bremen Research ship friction windlass - has pulleys with grooves accommodating fishing net ropes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102826475A (en) * 2012-09-10 2012-12-19 江苏科技大学 Horizontal type inclined cable-tension attenuating winch

Also Published As

Publication number Publication date
DK627384D0 (en) 1984-12-21
IN160709B (en) 1987-08-01
IT8420732A1 (en) 1985-10-27
AU588217B2 (en) 1989-09-14
GB8410905D0 (en) 1984-06-06
HU195162B (en) 1988-04-28
GB2138768B (en) 1986-04-23
ATE32598T1 (en) 1988-03-15
GB8311454D0 (en) 1983-06-02
IL71687A (en) 1987-12-31
EP0150187A1 (en) 1985-08-07
ZA843155B (en) 1984-12-24
FI845058A0 (en) 1984-12-20
HUT34930A (en) 1985-05-28
RO94168A (en) 1988-06-30
AU2867084A (en) 1984-11-19
EP0150187B1 (en) 1988-02-24
DK627384A (en) 1984-12-21
FI845058L (en) 1984-12-20
FI78053B (en) 1989-02-28
BR8406815A (en) 1985-03-19
DE3469433D1 (en) 1988-03-31
JPS60501156A (en) 1985-07-25
IT1174524B (en) 1987-07-01
RO94168B (en) 1988-07-01
FI78053C (en) 1989-06-12
CA1246540A (en) 1988-12-13
IT8420732A0 (en) 1984-04-27
DK153021B (en) 1988-06-06
GB2138768A (en) 1984-10-31
NO844918L (en) 1984-12-07
DD218340A5 (en) 1985-02-06
IL71687A0 (en) 1984-07-31

Similar Documents

Publication Publication Date Title
CN105143092B (en) Towing capstan
JP5341125B2 (en) Wedge and socket terminator, tension clamp and elevator system
US20130181177A1 (en) Lifting device with a toothed belt as supporting means
JPS625879B2 (en)
CA1186676A (en) Elevator winding device
CA1311742C (en) Rope traction device
DE682482C (en) Encapsulated log winch with electric motor drive (electric pulley block)
AU588217B2 (en) Improvements in or relating to winches
US4579547A (en) V-belt
JP2003532840A (en) belt
CA2016510A1 (en) Device for transmitting a drive force between a flexible element and a rotatable body
NZ209806A (en) Winch;friction of rotatable cable bearing surface varies along rotational axis
US5332195A (en) Rope traction device
EP2089305A1 (en) Drive for lifts
JP2500287B2 (en) Continuously variable transmission system
RU2783014C1 (en) Device for tensioning a rope coming from a remotely positioned drum
EP1163184B1 (en) Power transmission and bearing arrangement for a drum
FI78886B (en) Towing device.
SU1198877A2 (en) Rope-guiding drum
JPS6330731Y2 (en)
WO2006027840A1 (en) Drive device of elevator
SU962171A1 (en) Apparatus for monitoring tension of flexible pull member of hoist
PL147379B1 (en) Hoisting winch
WO1984001361A1 (en) Cable reeling device
GB2163725A (en) Winding and re-winding unit for covers, canopies and other sheet materials

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): AU BR DK FI HU JP KP MC NO RO SU US

AL Designated countries for regional patents

Designated state(s): AT BE CF CG CH CM DE FR GA GB LU MR NL SE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 1984901789

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 845058

Country of ref document: FI

WWP Wipo information: published in national office

Ref document number: 1984901789

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1984901789

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 845058

Country of ref document: FI