US3707275A - Hoisting device - Google Patents

Hoisting device Download PDF

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Publication number
US3707275A
US3707275A US69709A US3707275DA US3707275A US 3707275 A US3707275 A US 3707275A US 69709 A US69709 A US 69709A US 3707275D A US3707275D A US 3707275DA US 3707275 A US3707275 A US 3707275A
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United States
Prior art keywords
drum
rope
roller
windings
housing
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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
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US69709A
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English (en)
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Carter H Arnold
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Individual
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Individual
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Publication of US3707275A publication Critical patent/US3707275A/en
Assigned to BARCLAYSAMERICAN/BUSINESS CREDIT, INC. reassignment BARCLAYSAMERICAN/BUSINESS CREDIT, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SKY CLIMBER, INC., A CORP. OF WA.
Assigned to FIDELCOR BUSINESS CREDIT CORPORATION reassignment FIDELCOR BUSINESS CREDIT CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SKY CLIMBER, INC., A CORP OF WA
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66D1/7442—Capstans having a horizontal rotation axis
    • B66D1/7447—Capstans having a horizontal rotation axis driven by motor only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0183—Details, e.g. winch drums, cooling, bearings, mounting, base structures, cable guiding or attachment of the cable to the drum
    • B66D2700/0191—Cable guiding during winding or paying out
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/11—Cable drum feed for presser

Definitions

  • Prior art hoists of the subject type usually include a drum having a plurality of peripherally extending parallel grooves in which the rope windings are received and the shunting of' the rope from'one winding to an adjacent winding is accomplished by guide elements fixedly secured relative to the housing of the drum. Since the forces on the rope are normally quite high the engagement of the rope with the shunting elements has created a considerableamount of friction with its attendant loss of power'and has also caused wear on the rope and the shunting elements. 'By the present invention both wear and friction are minimized by providing rollers for shunting the rope from one winding to an adjacent winding. Furthermore, by the present invention the tension rollers which apply tension to the rope are driven in the direction of travel of the rope so as to further minimize wear and friction.
  • hoists of the type shown in US. Pat. No. 3,063,653 are designed for use in hoisting applications wherein one end of the rope is always loaded and the other end is always slack.
  • the hoist of the present invention lends itself to use in'hoisting applications wherein either end may be loaded or unloaded.
  • Another advantage of the present-invention is that a closed tamper proof housing is provided and the drum is made self-reeving by a unique arrangement of the tension and transfer rollers.
  • This self-reeving feature the proper operation of the rollers can not be in- .terfered with even by the operator and, when the drum is first reeved, it may be done simply by feeding the rope in an opening in the housing so that said rope is reeved around the drum and shunted from one groove to another automatically without intervention of the operator.
  • FIG. 1 is a side elevation of the hoist with one side broken away to show internal structure
  • FIG. 2 is a schematic perspective of the rope windings showing the manner in which the transfer rollers act on the rope;
  • FIG. 3 is a partial elevation and vertical section through the hoist taken in a plane indicated by lines 3 3 of FIG. 1; v
  • FIG. 4 is a schematic developed view of the rollers around the periphery of the drum showing their contours and arrangement relative to each other;
  • FIG. 5 is a view similar to FIG. 4 showing the shunting action of the transfer rollers
  • FIG. 6A is a schematic view of a portion of the drum periphery showing the manner in which the drum drives the rollers
  • FIG. 6B is a view similar to FIG. 6A but with the drum rotating in the opposite direction;
  • FIG. 7 is a longitudinal section through a tension roller and the periphery of the drum as taken in a plane indicated by lines 7 --7 of FIG. 1;
  • FIG. 8 is a longitudinal section through a transfer roller and the periphery of the'drum as talten in a plane indicated by lines 8--8 of FIG. 1;
  • FIG. 9 is a schematic of a hoisting arrangement wherein both ends of the rope may be loaded.
  • FIG. 10 is a vertical sectional view partly in elevation of a modified rope guide for testing the straightness of the wire
  • FIG. 11 is a fragmentary expanded top plan view of the drum periphery adjacent the-rope windings showing a modified form of the invention
  • FIG. 12 is a fragmentary cross section through the drum as taken in a plane indicated by lines 12-12 of FIG. 11. I
  • the invention includes a housing generally designated. 1 which supports an electric motor or air motor 2 which in turn drives a worm gear 3 through a worm 4.
  • the worm gear 3 drives a drum shaft 5 which in turn is rotatably supported on side plates 6,7 of housing .1.
  • Control of the hoist may be'effected by switches (not shown) actuated by handle 8.
  • Fixedly secured to shaft 5 is the hoisting drum 10.
  • a scaffold or other load may be con nected to housing 1 by support member 9.
  • the periphery of drum 10 is provided with a plurality of circumferentially extending parallel grooves which are numbered 11 to 16 from right to left in FIGS. 7 and 8. As will be seen later on the tension end 18 of rope 20 is received in the first groove 11 and extends substantially 300 around said groove until it is shunted to groove 12. The rope is wrapped in groove 12 for substantially 300 until it is shunted to groove 12 and so on until the rope is fed off groove'l6 to constitute the tail end or slack end 19 of the rope.
  • Transfer roller 22 and the mounting thereof is shown in detail in FIG. 8 and the roller comprises a generally cylindrical body portion 30 which is provided at its opposite ends with sleeve bearings 31 for rotatably supporting the roller structure on a fixed shaft 32 extending between opposite side plates 6,7 of the hoist houswell into the associated groove 12 of the drum thereby permitting a smooth shunting action of the rope.
  • a shell'37 Surrounding the body portion 30 of the roller 22 is a shell'37 preferably formed of a tough resilient plastic material such as polyurethane. As will be seen later on this shell .37 is contoured to provide annular grooves cooperating with the rope in a manner to be described.
  • the opposite ends of the roller 22 are diametrically enlarged and formed to provide a pair of generally axially directed frustoconical surfaces 38,39 which are adapted to cooperate respectively with complementary formed enlarged ends 40,41 ofdrum 10;
  • the body portion 30 of roller 22 is preferably formed of steel and the opposite ends 38,39, engaging the ends 40,41 of steel drum 10, act to position the transfer roller in a predetermined position axially relative to the drum thereby properly positioning the wire windings.
  • roller 22 slight axialshifting of roller 22 is permitted to conform to the inherent t'endencyof the rope windings to walk axially along the length of the drum due to the helical form of the windings; Depending upon the I direction of rotation of the drum the roller 22 is urged against one or the other of the ends 40,41 of the drum providing a substantially positive positioning of the windings.
  • the remaining transfer rollers are identical in structure and mounting to the above described roller 22 except that, as seen in FIGS. 4, and 6, the annular projection 35 is in a different position for each roller as indicated since said projections cooperate with different grooves of the drum 10.
  • Atspaced points around the periphery of the drum l0 and interposed between each pair of adjacent transfer rollers are a plurality of tension rollers which are spring urged radially inwardly of the drum in order to enhance the frictional engagementbetween the rope and the periphery of the drum.
  • additional similar tension rollers 48,49,50' are also provided, it being understood that the greater number of tension rollers the greater will be the traction developed between the rope and the drum periphery. The required pressure in the rope is thus reduced and reeving made easier.
  • tension roller 43 is shown in detail and it is seen that the same is provided with an inner cylindrical portion 53 to the opposite ends of which are secured sleeve bearings/S4 rotatably supported on shaft 56.
  • the opposite ends of shaft 56 are mounted in blocks 57,58 slidably supported for movementradially of the drum in grooves 59,60 formed in side plates 6,7 of the housing 1.
  • the blocks 57,58 are urged radially inwardly of the drum 10 at all times by means of compression springs 62.
  • a shell 64 also preferably formed of polyurethane plastic and peripherally formed to cooperate with the rope windings in a manner to be described.
  • the remaining tension rollers are similar to roller 43 in construction and mounting" except that their peripheries are appropriately formed depending upon the location of the tension rollers relative to'the rope windings.
  • the tension rollers are similarly formed with frustoconical ends 66,67 adapted to cooperate with the complementarily formed end portions 40,41 of the drum 10.
  • the steel drum 10 is driving the polyurethane tension roller 43 by frictional engagement with the left hand end of the latter.
  • upon reversal of the direction of rotation of the drum tension roller 43 is shifted to the right in FIG. 7 so that the roller is driven through engagement of the drum with its right hand end.
  • FIGS. 2, 5 and 6B the engagement between rope and the transfer rollers is shown for the condition in which the drum 10 is rotating-in a counterclockwise direction as seenin FIG. 1 and the rope is moving rela: tive to the housing in a direction from right to left in FIGS. 5 and 6B-
  • the opposite sides of transfer rollers 22, 23, 24 and 25 become active and transfer roller 26 functions to shunt the rope from groove 16 to groove 15 but in such an event transfer roller 21 becomes inoperative. This action can best be seen with reference to FIG. 5.
  • the peripheral grooves in the tension rollers are appropriately formed to permit continuous frictional engagement with the rope.
  • the relatively wide groove 69 that receives the rope 20 is of sufficient width to permit the shifting of the associated rope juncture depending upon the rotation of the latter.
  • the minimum diameter of groove 69 is also less than the minimum diameter of the remaining grooves since the rope 20 is displaced radially outwardly between adjacent grooves.
  • One of the most important features of the present invention is the arrangement of transfer rollers and tension rollers as above described which results in the guided by the tension rollers and transfer rollers until it reaches transfer roller 21 which shunts it into adjacent groove 12 where it is immediately gripped by tension.
  • the performance of the hoist of FIGS. 1,3 may be enhanced by forming the frustoconical end portion 66 to a slightly smaller effective diameter than the opposite end 67.
  • FIG. 7 it is seen that, as the hoist is raising the load, the tension roller 43 is being driven by the left hand end 40 of the drum and the tail end of the rope is urged out of groove 16 by roller 43 which, acting at a greater radius on drum has a greater peripheral speed than the drum.
  • the drum rotation is reversed frustoconical end 67 acting at a smaller radius on shoulder 41 provides a slight drag with respect to the unloaded end.
  • the result of this structure is that the windings are more effectively urged against the grooves and traction is improved.
  • FIGS. 1,3 The hoisting arrangement of FIGS. 1,3 is appropriate for use in raising and lowering scaffolding, however the invention is not restricted to such an arrangement.
  • FIG. 9 there is shown schematically a hoisting arrangement wherein the hoist housing 1' is fixed to an elevated structure and the rope ends 18, 19' are run over sheaves 80,81 and are connected to cages 82,83 respectively.
  • the cages 82,83 may be simultaneously loaded and unloaded or one load may be employed as a counterweight to permit raising the other with twice the load for a given horsepower than if no counterweight were present.
  • the present invention lends itself to this last mentioned application because of the fact that the tension rollers and shunt rollers are provided at spaced points around the entire periphery of the drum so that adequate traction is provided at all times regardless of the direction of drum rotation and regardless of the" tension differential in the rope ends.
  • a drum having graduated groove diameters is not used in an arrangementsuch as shown in FIG. 9.
  • transfer rollers as distinguished from fixed guides reduce the wear and loss of power but it also prevents excessive wear and damage to the rope.
  • the provision of the plastic 78 results in a reduction of the effective area of engagement between the rope and the hard metal of the groove thus increasing the unit pressure.
  • the plastic 78 also keeps foreign matter out of the bottom of the groove and improves the reeving action.
  • FIG. 1 a tubular guide is shown to direct the end of rope 18 to short guide 72 and tension roller 49.
  • FIG. 10 An alternative arrangement is illustrated in FIG. 10 wherein the rope. 18 is inserted into the housing 1 through a tubular guide 86 formed with an enlarged diameter section 87. This section 87 connects at its lower end with a flared portion 88 which in turn connects with a continuation 89 of guide 86.
  • the lower end of enlarged section 87 thus provides an annular shoulder 90 which engages and acts as an abutment stop for the end of the wire in the event the terminal portion of the wire deviates from a straight line beyond a predetermined limit.
  • a predetermined limit For example, the terminal portion schematically indicated by dot dash proper selforeeving past the. various rollers unlikely.
  • annular shoulder 90 may be varied to test the straightness of the wire so that any predetermined degree of straightness may be achieved. 4
  • FIGS. 11, 12 that portion of the drum 10 that cooperates with transfer rollers 23, 24, is shown together with tension rollers 45; 46J
  • This embodiment of the invention includes a fixed guide 92 positioned on each side of each transfer roller.
  • Each guide is carried by a shaft 93 which is fixedly secured at its opposite ends in side plates 6, 7.
  • guides 92 may be made from relatively thin plate and are secured to their supporting shafts 93 at an angle so that they are coplanar with the central plane of the associated transfer roller.
  • the guides 92 associated with transferroller 24 serve to constrain the rope between the adjacent tension roller and the transfer roller.
  • the rope end coming from the tension roller 46 strikes the guide 92 between said tension roller 46 and transfer roller 24 and is directed to the working side of the latter.
  • the fixed guide 92 on the left side of roller 24 deflects the rope to the working side of roller 24.
  • This action of the rope is indicated by dotted linesin FlG. 1 1.
  • each guide 92 may be positioned closely adjacent the periphery of the drum and, as shown in FIG. 12, the extent of each guide may be increased toward 'the drum to provide substantially complete restraint of the wire at all times.
  • shunt roller 26 could be interchanged with tension roller 48.
  • The, arrangement thus resulting would be similar to that shown in pending application Ser. No. 69,710 filed Sept. 4, 1970. a
  • a hoisting device comprising:
  • said deflecting means comprising a roller free for axial movement and rotatably supported in said housing and in engagement with a winding of said rope at one side of the latter,
  • said drum being formed at one of its opposite ends with an annular coaxial abutment and said roller being formed with an annular abutment adapted to engage said drum at said drum abutment to limit movement of said roller axially relative to said drum.
  • a device wherein said drum is formed with a coaxial abutment at each end and said roller is rotatably supported on a shaft carried by said housing and is adapted to shift axially on said shaft into engagement with one or the other of the abutments on said drum.
  • a device according to claim 1 wherein said roller is provided with a peripherally extending groove in registration with an adjacent undefiected winding therein.
  • a hoisting device comprising:
  • said drum being formed with a plurality of axially spaced parallel grooves in planes perpendicular to the axis of said drum,
  • roller being provided with a plurality of peripherally extending grooves adapted to receive said rope windings therein for reducing the pressure on said rope
  • said drum being formed at one of its opposite ends with an annular coaxial abutment and said tension roller being formed with an annular abutment adapted to engage said drum abutment to limit movement of said roller axially relative to said drum.
  • a device wherein said drum is formed at each of its opposite ends with an axially inwardly directed coaxial shoulder and said roller is supported for slidable axial movement into engagement with one or the other of said shoulders.
  • a hoisting device incorporating automatic reeving wherein a wire rope is reeved around a drum in a plurality of windings and means is provided for leading the free end of such rope circumferentially around said drum to so form said windings without manual intervention, said device comprising:
  • shunt rollers for deflecting said rope from one winding to an adjacent winding during rotation of said drum with the deflected portions of said rope in engagement with the periphery of said drum
  • a hoisting device comprising:
  • said drum being formed with a plurality of axially spaced parallel grooves in planes perpendicular to the axis of said drum,
  • said rope having 'a loaded end and a slack end whereby the tension in said rope decreases along the lengths of said windings toward said slack end,
  • said groove being formed to a larger diameter at said loaded end than at said slack end to reduce the relative movement between rope and drum and to improve traction and decrease wear
  • the difference in diameter between the loaded and slack ends of the drum being in the orderof the difference in lengths of the windings at said ends due to elongation of the rope at said loaded end.
  • a hoisting device comprising:
  • said drum being formed with a plurality of axially spaced parallel grooves in planes perpendicular to the axis of said drum,
  • shunt rollers for deflecting said rope from one winding to an adjacent winding during rotation of said drum with the deflected portions of said rope forming said junctures in engagement with the periphery of said drum
  • each of said rollers being rotatably supported in said housing and each being positioned with its axis of rotation substantially parallel to the periphery of said drum and spaced apart peripherally of said drum from an adjacent roller.
  • a device according to claim 10 wherein said rollers are spaced apart around the entire periphery of said drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
US69709A 1970-09-04 1970-09-04 Hoisting device Expired - Lifetime US3707275A (en)

Applications Claiming Priority (1)

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US6970970A 1970-09-04 1970-09-04

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US (1) US3707275A (xx)
BE (1) BE772139A (xx)
CA (1) CA948617A (xx)
CH (1) CH531985A (xx)
DE (1) DE2144330A1 (xx)
FR (1) FR2105246B1 (xx)
GB (1) GB1339596A (xx)
NL (1) NL7112134A (xx)
SE (1) SE379030B (xx)
ZA (1) ZA715926B (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186283A (en) * 1991-09-26 1993-02-16 Otis Elevator Company Triple-wrap traction arrangement
US20060273293A1 (en) * 2005-04-20 2006-12-07 Atlas Devices Llc Powered rope ascender and portable rope pulling device
US20070012813A1 (en) * 2005-07-12 2007-01-18 Poly-Clip System Gmbh & Co. Kg Clip reel and system for unwinding a clip reel
US20070194290A1 (en) * 2005-04-20 2007-08-23 Atlas Devices Llc Device to enable rope pulling functionality using a rotational power source
US20080128668A1 (en) * 2006-11-14 2008-06-05 Atlas Devices Llc Multiple line powered rope ascender and portable hoist
US20080203370A1 (en) * 2005-04-20 2008-08-28 Atlas Devices, Llc Powered Rope Ascender and Portable Rope Pulling Device
WO2009028932A1 (en) * 2007-08-24 2009-03-05 Heerema Marine Contractors Nederland B.V. Axial displacement device, line deployment system, and a method for deploying a line
US20140061557A1 (en) * 2012-09-03 2014-03-06 Soletanche Freyssinet Traction system using a multi-tendon cable with a deflection angle
US9988251B2 (en) * 2013-05-13 2018-06-05 David R. Hall Motorized lifting device with mounting flanges
US20220306433A1 (en) * 2021-03-25 2022-09-29 Bernward Welschof Ejector for a Forestry Winch
US20220306432A1 (en) * 2021-03-25 2022-09-29 Bernward Welschof Ejector for a Forestry Winch
CN116730229A (zh) * 2023-08-09 2023-09-12 河南东起机械有限公司 一种基于伺服控制的环保节能型往复式卷扬机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015000466A2 (de) * 2013-07-02 2015-01-08 Technische Universität Dresden Treibtrommeltrieb

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13325C (de) * R. LÜDERS in Görlitz Kraftsammelnde Bremse
US772074A (en) * 1902-11-25 1904-10-11 Edward S Isham Elevator.
GB656661A (en) * 1948-05-24 1951-08-29 Carrimore Six Wheelers Ltd Improvements in and relating to hose reels
DE956441C (de) * 1955-04-02 1957-01-17 Stahl Maschinenfabrik R Seilwicklungsvorrichtungen fuer Seiltrommeln
US2917279A (en) * 1956-11-13 1959-12-15 Carter H Arnold Hoisting device
US2922623A (en) * 1955-11-14 1960-01-26 Horace B Simmons Hoists
US2976017A (en) * 1958-07-07 1961-03-21 Le Bus Royalty Company Pressure bar for cable spooling drums
US3226090A (en) * 1963-06-18 1965-12-28 Aircraft Armaments Inc Materials handling arrangement
US3353793A (en) * 1966-07-01 1967-11-21 North American Aviation Inc Cable retainer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13325C (de) * R. LÜDERS in Görlitz Kraftsammelnde Bremse
US772074A (en) * 1902-11-25 1904-10-11 Edward S Isham Elevator.
GB656661A (en) * 1948-05-24 1951-08-29 Carrimore Six Wheelers Ltd Improvements in and relating to hose reels
DE956441C (de) * 1955-04-02 1957-01-17 Stahl Maschinenfabrik R Seilwicklungsvorrichtungen fuer Seiltrommeln
US2922623A (en) * 1955-11-14 1960-01-26 Horace B Simmons Hoists
US2917279A (en) * 1956-11-13 1959-12-15 Carter H Arnold Hoisting device
US2976017A (en) * 1958-07-07 1961-03-21 Le Bus Royalty Company Pressure bar for cable spooling drums
US3226090A (en) * 1963-06-18 1965-12-28 Aircraft Armaments Inc Materials handling arrangement
US3353793A (en) * 1966-07-01 1967-11-21 North American Aviation Inc Cable retainer

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186283A (en) * 1991-09-26 1993-02-16 Otis Elevator Company Triple-wrap traction arrangement
US7581715B2 (en) 2005-04-20 2009-09-01 Atlas Devices, Llc Powered rope ascender and portable rope pulling device
US20080017838A1 (en) * 2005-04-20 2008-01-24 Atlas Devices, Llc Powered rope ascender and portable rope pulling device
US7934698B2 (en) 2005-04-20 2011-05-03 Atlas Devices, Llc Powered rope ascender and portable rope pulling device
US7261278B2 (en) 2005-04-20 2007-08-28 Atlas Devices, Llc Powered rope ascender and portable rope pulling device
US20070194290A1 (en) * 2005-04-20 2007-08-23 Atlas Devices Llc Device to enable rope pulling functionality using a rotational power source
US20060273293A1 (en) * 2005-04-20 2006-12-07 Atlas Devices Llc Powered rope ascender and portable rope pulling device
US20080203370A1 (en) * 2005-04-20 2008-08-28 Atlas Devices, Llc Powered Rope Ascender and Portable Rope Pulling Device
US20070012813A1 (en) * 2005-07-12 2007-01-18 Poly-Clip System Gmbh & Co. Kg Clip reel and system for unwinding a clip reel
US7475521B2 (en) * 2005-07-12 2009-01-13 Poly-Clip System Gmbh & Co. Kg Clip reel and system for unwinding a clip reel
US20080128668A1 (en) * 2006-11-14 2008-06-05 Atlas Devices Llc Multiple line powered rope ascender and portable hoist
AU2008293102B2 (en) * 2007-08-24 2014-10-30 Heerema Marine Contractors Nederland S.E. Axial displacement device, line deployment system, and a method for deploying a line
US20110108786A1 (en) * 2007-08-24 2011-05-12 Heerema Marine Contractors Nederland B.V. Axial displacement device, line deployment system, and a method for deploying a line
WO2009028932A1 (en) * 2007-08-24 2009-03-05 Heerema Marine Contractors Nederland B.V. Axial displacement device, line deployment system, and a method for deploying a line
US8702067B2 (en) * 2007-08-24 2014-04-22 Heerema Marine Contractors Nederland Se Axial displacement device, line deployment system, and a method for deploying a line
US20140061557A1 (en) * 2012-09-03 2014-03-06 Soletanche Freyssinet Traction system using a multi-tendon cable with a deflection angle
US9708164B2 (en) * 2012-09-03 2017-07-18 Soletanche Freyssinet Traction system using a multi-tendon cable with a deflection angle
US9988251B2 (en) * 2013-05-13 2018-06-05 David R. Hall Motorized lifting device with mounting flanges
US20220306433A1 (en) * 2021-03-25 2022-09-29 Bernward Welschof Ejector for a Forestry Winch
US20220306432A1 (en) * 2021-03-25 2022-09-29 Bernward Welschof Ejector for a Forestry Winch
CN116730229A (zh) * 2023-08-09 2023-09-12 河南东起机械有限公司 一种基于伺服控制的环保节能型往复式卷扬机
CN116730229B (zh) * 2023-08-09 2023-11-03 河南东起机械有限公司 一种基于伺服控制的环保节能型往复式卷扬机

Also Published As

Publication number Publication date
ZA715926B (en) 1972-04-26
DE2144330A1 (de) 1972-03-09
NL7112134A (xx) 1972-03-07
SE379030B (xx) 1975-09-22
AU3310571A (en) 1973-03-08
FR2105246B1 (xx) 1975-02-21
CA948617A (en) 1974-06-04
BE772139A (fr) 1972-01-17
GB1339596A (en) 1973-12-05
FR2105246A1 (xx) 1972-04-28
CH531985A (de) 1972-12-31

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