US3258130A - Arrangement controlling the pivoting arm of a crane and cranes incorporating said arrangement - Google Patents

Arrangement controlling the pivoting arm of a crane and cranes incorporating said arrangement Download PDF

Info

Publication number
US3258130A
US3258130A US359155A US35915564A US3258130A US 3258130 A US3258130 A US 3258130A US 359155 A US359155 A US 359155A US 35915564 A US35915564 A US 35915564A US 3258130 A US3258130 A US 3258130A
Authority
US
United States
Prior art keywords
sprocket wheel
pinion
tower
crane
speed
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.)
Expired - Lifetime
Application number
US359155A
Other languages
English (en)
Inventor
Mieville Andre
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.)
INTERNAZIONALEN BAUMASCHINEN
Original Assignee
INTERNAZIONALEN BAUMASCHINEN
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 INTERNAZIONALEN BAUMASCHINEN filed Critical INTERNAZIONALEN BAUMASCHINEN
Application granted granted Critical
Publication of US3258130A publication Critical patent/US3258130A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear

Definitions

  • Cranes of such a type are well-known and have achieved a considerable success by reason of their easy assembling and efficiency and they are widely used on all building sites in the case both of houses or of engineering works where it is necessary to hoist mortar, bricks or the like building materials.
  • cranes of a novel type are required, which are capable of raising and positioning structural elements of an intricate shape and which are comparatively large-sized, said cranes being capable of ensuring a maximum safety and an optimum efficiency in operation.
  • the jib and the counterjib are carried by a ring-shaped member provided with bearing sections or flanges and actuated in unison with a sprocket wheel adapted to be driven into rotation by an electric motor with the interposition of a speed-reducing gear which actuates in its turn a pinion engaging directly said sprocket wheel.
  • the electric motor, speed-reducing gear and pinion are mounted permanently on the crane tower in such prior arrangements.
  • a drawback is met therein which consists in that the connection between the pinion and the sprocket wheel is governed permanently by the position of the jib with reference to the pinion the axis of which is stationary and by the conditions of loading of the crane.
  • C designates the sprocket wheel
  • P the pinion the speed-reducing gear
  • A the ring-shaped member rigid with and overlying the sprocket Wheel C
  • T the tower of the crane
  • 11 designate four pairs of rollers mounted loose at the upper end of the tower T inside the sprocket wheel and opposing the translation of the latter.
  • the electric motor M controlling the speed-reducing gear R and permanently secured to the tower T is not illustrated.
  • the counterjib is designated by CF.
  • FIG. 1 shows the arrangement when the jib F carries no load in the position illustrated.
  • the pinion P and the sprocket wheel C have a tendency to move apart and to show a comparatively large clearance between them, whereby the pinion teeth which engage only a small fraction of the surface of the teeth of the sprocket wheel are subjected to an exaggerated stress per unit of surface and may become blunt, taking also into account the action of a possible sliding.
  • FIG. 2 illustrates in contradistinction the condition for which the jib F is subjected to a load while it extends in the same direction as in FIG. 1.
  • One of the objects of the present invention consists in providing a rotary arrangement showing none of the above drawbacks while operating under unvarying perfect coupling conditions independently of the presence or of the absence of a load on the jib and of the angular position of said jib with reference to the pinion.
  • a further object of the invention is constituted by a crane and chiefly a crane mounted on a tower and incorporating a balanced arrangement controlling the rotation of the arm.
  • the improved arrangement according to the invention includes at least one speed-reducing gear carried by the sprocket wheel without being rigid with the stationary section of the crane and adapted however to execute movements of a reduced amplitude, whereby it is always possible to set the pinion associated with the sprocket wheel under unvarying coupling conditions with the latter for any position of and/or for any load on the rotary section of the crane.
  • the sprocket wheel is given an I-shaped transverse cross-section and the speed reducing gear is carried by at least one pair of carrier rollers or shoes engaging the interval between the upper and lower flanges of the sprocket wheel. There are preferably two such pairs of carrier rollers or shoes.
  • the speed reducing gear is guided by at least one pair, and preferably by two pairs of centering shoes.
  • the speed reducing gear is carried by a plate carrying simultaneously the pair or pairs of carrier rollers or shoes and the pair or pairs of centering rollers or shoes.
  • the surfaces of the stops or of the movable speed reducing gear associated with the latter are provided with damping elements of an elastic material, such for instance as small rubber buffers or slightly projecting springs adapted not only to damp the engagement between the speed reducing gear and the stationary stops, but also to absorb part of the kinetic energy of the arms constituted by the jib and counter-jib when the latter start or stop at the end of their travel. Since the speed reducing gear or gears are carried by the jib, they are subjected to the acceleration of the arms when starting or stopping and cooperate in ensuring a greater uniformity for the movement of the arms under the action of the uninterrupted engagement with the damping means provided for the entire rotary section of the crane.
  • damping elements of an elastic material such for instance as small rubber buffers or slightly projecting springs adapted not only to damp the engagement between the speed reducing gear and the stationary stops, but also to absorb part of the kinetic energy of the arms constituted by the jib and counter-jib when the latter start or stop at the end of
  • the means ensuring constant coupling conditions include two speed-reducing gear and pinion systems driven by a single motor and arranged in diametrically opposed relationship While they are interconnected by a rigid coupling constituted by a rod for instance.
  • Such an arrangement provides the advantage consisting in that the speed reducing gears are controlled and tensioned by the motor in a constantly balanced manner since any initial lack of balance is automatically cut out by a slight shifting of the motor towards the speed reducing gear which is idling and by a corresponding increase of the stress exerted on the speed reducing gear which has been precedingly subjected to a lesser load.
  • the present invention covers also the hoisting cranes particularly when carried on towers, which incorporate the arrangement disclosed constituted by a single speed reducing gear and pinion system or by two such systems fitted on the sprocket wheel C, instead of being fitted on the crane tower.
  • FIGS. 1 and 2 are, as already mentioned, explanatory figures,
  • FIG. 3 is a diagrammatic plan view, similar to FIGS. 1 and 2, of the improved arrangement,
  • FIG. 4 is a cross-section through line IV-IV of FIG. 3,
  • FIG. 5 is a front view of a crane incorporating the arrangement according to the invention.
  • FIG. 6 is a diagrammatic plan view of a preferred arrangement with a motor driving two speed reducing gears.
  • the tower is again designated by the reference letter T, the ring-shaped member on which the jib F and the counter-jib CF are fitted by the reference letter A, the sprocket wheel by C, the speed-reducing gear controlled by the motor M by the reference letter R, the pinion by the reference letter P and the four pairs of rollers on the sprocket wheel C by the numbers 1-1.
  • the speed reducing gear R is no longer secured through a plate to the tower T, but is suspended to the sprocket wheel C by means of one or more pairs of rollers or carrier shoes S4. Preferably two pairs of rollers or carrier shoes are provided for each speed reducing gear.
  • the sprocket wheel C is given in the present case a cross-section in the shape of an I which allows the speed reducer R and the corresponding pinion P to be carried directly by said sprocket wheel C upon insertion, between the two upper and lower flanges defined by the cross-section of the sprocket wheel in a manner somewhat similar to the bead and flange of a rail, of at least one pair of rollers 8-8 to which are secured the rods ss carrying the Whole speed-reducing gear and pinon system (III- IG. 4).
  • the carrier rollers SS may be replaced by s oes.
  • FIG. 3 illustrates the case where the suspended speed reducing gears are distributed in diametrically opposed relationship at R and R2. It should be mentioned that it is also possible to obtain constant coupling conditions with a single speed reducing gear R. In the latter case, the motor M may be fitted directly on the speed-reducing gear R. In addition to the pinion P and to the pairs of carrier rollers SS already mentioned, it is possible to associate with each speed reducing gear two pairs 2-2 of rollers guiding the sprocket wheel C and a pulley Z which is driven by the motor M through the agency of a transmission belt Q.
  • a plate H secured to the tower T is provided with two lateral stops J on which are also fitted damping cushion 19 or the like means.
  • the damping means are illustrated at 20.
  • Said damping means 19 and 20 may as well be secured to the sides of the speed-reducing gears R and R2 facing the stops I and 12.
  • the operation of said damping means is of a considerable importance since they do not serve solely for damping the contact between the speed-reducing gears and the stops but they also allow the whole arrangement of speed-reducing gears suspended to the jib to exert a damping action on the entire rotary section of the crane when the latter is subjected to an acceleration at the start and at the stop.
  • the oscillations of said arrangement are absorbed by the damping means 19 and 2t), and consequently the speed reducing gears absorb a fraction of the kinetic energy of the pivoting arms.
  • the improved arrangement including a speed reducing gear which is independent of the stationary section of the crane and is fitted on the rotary sprocket wheel, it is possible to make sure that the pinion controlled by the speed reducing gear remains permanently under the same coupling conditions with reference to the sprocket Wheel without being subjected to wear or to break.
  • the operation of the improved arrangement is very simple.
  • the motor M transmits motion through the agency of the belt Q to the pulley Z which is connected by means which are not illustrated with the pinion P.
  • the pinion P thus driven by the motor M drives the sprocket wheel C and has a tendency to move with the latter and to carry along with it the box or plate carrying the speed-reducing gear R.
  • the box moves, but meets the stop I so that it remains stationary and holds the pinion P against movement and consequently the latter remains also stationary and only the sprocket wheel C moves together with the ring-shaped member A the jib F and the counterjib CF.
  • FIG. 4 which is a cross-section of FIG. 3 along the line 1V1V, there is shown on the left-hand side the pair of rollers SS carrying the speed reducing gear R in contacting relationship with the part 3d of a tooth or of a pin of the sprocket wheel C while on the right-hand side there is shown a pair of rollers 3-3 guiding the sprocket wheel C associated with the speed reducer R2.
  • the same right-hand side of FIG. 4 also shows the engagement between P2 and the tooth 32 of the sprocket wheel C.
  • the left-hand side of FIG. 4 shows in contradistinction the rods or pins ss projecting beyond the rollers SS and holding the speed reducing gear R.
  • FIG. 3 a single motor M secured to the tower is illustrated.
  • two speed-reducing gears R and R2 are used, it is of considerable interest to use a single central motor M which may be subjected to small displacements as disclosed in FIG. 6.
  • the motor M or its base 43 is rigid with a section of the tower T or is pivotally secured for instance at by means of two rods 41 and 42 whereas the same motor is connected with the other section of the tower T by an elastic element 35 which allows it to execute small movements.
  • the motor M upon starting, the motor M is nearer the second gear R2 so that the belt Q of the first gear Q is more tensioned than Q2 and consequently is subjected to a greater stress; said belt generates automatically a reaction: in other words it urges the motor M towards the speed reducing gear R.
  • FIG. 5 is a diagrammatic front view of a complete crane incorporating the improved arrangement.
  • B A designates the pedestal of the tower which runs on rails 50 while E1, E2 En designate standard superposed sectional elements forming the tower T and which are superposed during the assembly by a shifting of the head of the tower T by means of a worm V.
  • CF designate furthermore the counterjib and F the jib, said jib and counterjib being secured to the ring-shaped member A superposed over the sprocket wheel C.
  • the references 15 and 16 designate the ties connecting the outer ends of the counterjib and of the jib with an upper ring-shaped member A l adapted to be shifted in unison with A and C.
  • Said upper ring-shaped member A1 may be given a diameter less than that of A whereby the movable head of the tower T extending between A and All may be given a frustoconical shape instead of the cylindrical shape illustrated.
  • the motor M is secured to the tower T and may execute movements of a reduced amplitude whereas the speed reducing gear is independent of the tower T and is carried by the sprocket wheel C and may execute movements of a very reduced amplitude so that the coupling between the pinion and the sprocket wheel remains unchanged whatever may be the position of the arms and whatever may be the load carried by the jib.
  • the sprocket wheel C may also be constituted by two or more separate ring-shaped members, in which case the arrangement according to the invention may be applied to either of said members indifferently but preferably to the upper ring-shaped member.
  • stops carried by said tower -a rotary section comprising a ring-shaped member rev-olvably carried by said stationary section, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member,-a pinion meshing permanently with said sprocket wheel, a motor, a speed reducing gear controlled by the motor controlling said pinion and carried by the sprocket wheel independently of the stationary section of the crane and holding said pinion is permanent unvary'ing meshing conditions with the sprocket wheel said stops allowing a smal'l range of movement of said gear and pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxial-1y rigid with said member and provided with upstanding and depending peripheral flanges, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor, controlling said pinion and carried by the sprocket wheel independently of the tower of the crane, and carrier members fitted between the flanges of the sprocket wheel and holding the speed-reducing gear in position said stops allowing a small range of movement of said gear and pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, stops carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket whee l coaxially rigid with said member, and and provided with upstanding and depending peripheral flanges, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor, controlling said pinion and carried by the sprocket wheel independently of the tower of the crane, and two pairs of rollers fitted between the flanges of the sprocket wheel and holding the speed-reducing gear in position said stops allowing a small range of movement of said gear and pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, centering rollers fitted between the sprocket wheel and the tower, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor, controlling said pinion and carried by the sprocket wheel independently of the tower of the crane said stops allowing a small range of movement of said gear and said pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, stops carried by said tower, at jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor and controlling said pinion, a plate carrying the speed-reducing gear independently of the tower, means centering the plate with reference to the sprocket wheel and at least one pair of rollers through which the plate is carried by the sprocket wheel said stops allowing a small range of movement of said gear and said pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion meshing perma nently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor and controlling said pinion, a plate carrying the speedsreducing gear independently of the tower, stops on said plate, two pairs of rollers centering the plate with reference to the sprocket wheel said stops allowing a small range of movement of said gear and pinion relative to said sprocket wheel and two pairs of rollers through which the plate is carried by the sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaX-ially rigid with said member, a pinion meshing permanently with said sprocket wheel, a motor, a speedareducing gear controlled by the motor and controlling said pinion, a plate carrying the motor and the speed-reducing gear independently of the tower, stops on said plate, two pairs of rollers centering the plate with reference to the sprocket wheel and two pairs of rollers through which the plate is carried by the sprocket wheel said stops allowing a small range of movement of said gear and pinion relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib secured to said member in diametrically op- 8 posed relationship, a sprocket wheel coaxially rigid with said member, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor, controlling said pinion and carried by the sprocket wheel independently of the tower of the crane, and stops carried by the tower and engaging the speed-reducing gear at either end of its path to allow a small range of movement of said gear and said pinion relative to said sprocket wheel.
  • a rotary section com-prising a ring-shaped member revolvably carried by said tower, a jib and a counterjib secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion meshing permanently with said sprocket wheel, a motor, a speed-reducing gear controlled by the motor, controlling said pinion and carried by the sprocket wheel independently of the tower of the crane, stops carried by the tower and engaging the speed-reducing gear at either end of its path to allow a small range of movement of said gear and said pinion relative to said sprocket wheel, and shock-absorbing means fitted on at least one of the following parts, the stops and the cooperating areas of the speed-reducing gear.
  • a tower crane comprising a tower including a number of superposed elements and a rotary head revolvably carried at the upper end of said tower and including a ring-shaped member, a jib and a counterjib secured rigidly to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, two pinions meshing permanently with said sprocket wheel, and a speed-reducing gear controlling each pinion, a plate carrying each speed-reducing gear, at least one pair of rollers through which each plate is carried by the sprocket wheel, at least one pair of rollers centering each plate with reference to the sprocket wheel and means rigidly interconnecting the two plates to set the speed-reducing gears in diametrically opposed relationship, a motor carried by the tower, and controlling both pinions and projecting stops carried by the tower and engaging the plate to allow a small range of movement of each gear and pinion relative to said sprocket wheel, said movement ensuring permanent unvarying coupling
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion system comprising two pinions meshing permanently with said sprocket wheel, a motor, a speed-reducing gear system .of the crane, the two systems including pinions and carried by the sprocket wheel independently of the tower of the crane, the two systems including pinions and their associated speed-reducing gears being diametrically opposed with reference to the sprocket wheel said stops allowing a small range of movement of said gear and pinion systems relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion system comprising two pinions meshing permanently with said sprocket wheel, a motor, a speed-reducing gear system controlled by the motor controlling said pinions and carried by the sprocket wheel independently of the tower of the crane, the two systems including pinions and their associated speed-reducing gears being diametrically opposed with rcference to the sprocket wheel, and a rod rigidly interconnecting the two speed-reducing gears said stops allowing a small range of movement of said gear and pinion systems relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion system consisting of two pinions meshing permanently with said sprocket wheel, a motor carried by the tower, at speed-reducing .gear system controlling each pinion and carried by the sprocket wheel independently of the tower of the crane, two belts controlled by the motor and controlling each the speed-reducing gear corresponding to one pinion, the two systems including pinions and their associated speed-reducing gear being diametrically opposed with reference to the sprocket wheel, and a rod rigidly interconnecting the two speed-reducing gears said stops allowing a small range of movement of said gear and pinion systems relative to said sprocket wheel.
  • a rotary section comprising a ring-shaped member revolvably carried by said tower, a jib and a counter-jib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pinion system including two pinions meshing permanently with said sprocket wheel, a motor carried by the tower, a speedreduoing gear system controlling each pinion and carried by the sprocket wheel independently of the tower of the crane, two belts controlled by the motor and controlling each the speed-reducing gear corresponding to one pinion, the two systems including pinions and the associated speed reducing gears being diametrically opposed with reference to the sprocket wheel, and a rod rigidly interconnecting the two speed reducin-g gears said stops allowing a small range of movement of said gear and pinion systems relative to said sprocket wheel.
  • a tower crane comprising a tower including a number of superposed elements and a rotary head revo lvably carried at the upper end of said tower and including a ringashaped member, a jib and a counterjib rigidly secured to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, a pin-ion meshing permanently with said sprocket wheel, and a speed-reducing gear controlling said pinion and carried by the sprocket Wheel independently of the tower, a motor carried by the tower and controlling the pinion and projecting stops carried by the tower and engaging the speed-reducing gear to define a small range of movement 'of said pinion and gear relative to said sprocket Wheel, said movement ensuring permanent unvarying coupling conditions between the pin-ion and the sprocket wheel.
  • a tower crane comprising a tower including a number of superposed elements and a rotary head revolvably carried at the upper end of said tower and in cluding a ring-shaped member, a jib and a counterjib secured rigidly to said member in diametrically opposed relationship, a sprocket wheel coaxially rigid with said member, two pinions meshing permanently with said sprocket wheel, and a speed-reducing gear controlling each pinion and carried by the sprocket wheel independently of the tower, the two pinions and cooperating speed-reducing gears lying in diametrically opposed relationship and a rod rigidly interconnecting the two speed-reducing gears, a motor carried by the tower and controlling both pinions and projecting stops carried by the tower and engaging the speed-reducing gear to define a small range of movement of said gear and pinion relative to said sprocket wheel, said movement ensuring permanent unvarying coupling conditions between the pinion and the sprocket wheel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US359155A 1963-04-11 1964-04-13 Arrangement controlling the pivoting arm of a crane and cranes incorporating said arrangement Expired - Lifetime US3258130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH462163A CH392006A (it) 1963-04-11 1963-04-11 Dispositivo per la rotazione del braccio girevole di una gru

Publications (1)

Publication Number Publication Date
US3258130A true US3258130A (en) 1966-06-28

Family

ID=4279525

Family Applications (1)

Application Number Title Priority Date Filing Date
US359155A Expired - Lifetime US3258130A (en) 1963-04-11 1964-04-13 Arrangement controlling the pivoting arm of a crane and cranes incorporating said arrangement

Country Status (3)

Country Link
US (1) US3258130A (it)
CH (1) CH392006A (it)
ES (1) ES298580A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847105A (en) * 1970-12-14 1974-11-12 American Waterweed Harvesting Aquatic harvester
US3949881A (en) * 1974-11-11 1976-04-13 The Manitowoc Company Swing drive assembly
US4061230A (en) * 1976-01-08 1977-12-06 Pedestal Crane Corporation Crane crosshead assembly mounted on a pedestal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511048A (en) * 1982-06-04 1985-04-16 Handling Systems, Inc. Jib crane system having a rotatable mast

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132184A (en) * 1937-10-13 1938-10-04 Walter Charles Gonthier Dredge or excavator
US2461877A (en) * 1946-08-19 1949-02-15 Vickers Armstrongs Ltd Means for moving and controlling the motion of machinery
US2858945A (en) * 1953-09-22 1958-11-04 M Tichauer S A R L Soc Pivoting and hoisting arrangement for the distributing assembly of a tower crane
US2863531A (en) * 1956-11-19 1958-12-09 Moore Corp Lee C Tower erecting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132184A (en) * 1937-10-13 1938-10-04 Walter Charles Gonthier Dredge or excavator
US2461877A (en) * 1946-08-19 1949-02-15 Vickers Armstrongs Ltd Means for moving and controlling the motion of machinery
US2858945A (en) * 1953-09-22 1958-11-04 M Tichauer S A R L Soc Pivoting and hoisting arrangement for the distributing assembly of a tower crane
US2863531A (en) * 1956-11-19 1958-12-09 Moore Corp Lee C Tower erecting apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847105A (en) * 1970-12-14 1974-11-12 American Waterweed Harvesting Aquatic harvester
US3949881A (en) * 1974-11-11 1976-04-13 The Manitowoc Company Swing drive assembly
US4061230A (en) * 1976-01-08 1977-12-06 Pedestal Crane Corporation Crane crosshead assembly mounted on a pedestal

Also Published As

Publication number Publication date
ES298580A1 (es) 1964-08-16
CH392006A (it) 1965-05-15

Similar Documents

Publication Publication Date Title
US3106258A (en) Driving device for pile members
GB1393512A (en) Hoist having damped pendulum oscillations of the load
GB1402367A (en) Elevator system with temporary hoistway structure and method for use thereof
US2703180A (en) Crane
GB168845A (en) Improvements in and relating to hoisting and conveying devices
US3250400A (en) Rotary crane with split race bull wheel
US2358543A (en) Mucking machine for use in shaft sinking and in caisson sinking
CN216638715U (zh) 一种具有防摇摆功能的门式起重机
US1722125A (en) Lifting machine such as a crane
US3685669A (en) Derrick cranes and swinging derricks
CN105197826A (zh) 起重机及提升系统
FR2385621A1 (fr) Dispositif de manutention de traverses en beton precontraint ou produits analogues
CN113800406A (zh) 一种冶金起重机用起重机构
CN214462724U (zh) 一种装配式建筑墙板吊装装置
GB1125083A (en) Lifting apparatus
CN211895880U (zh) 一种建筑用升降装置
SU369780A1 (ru) Устройство дл предотвращени колебаний уравновешивающих канатов грузоподъемных машин
US341613A (en) John thompson
SU438298A1 (ru) Печь дл электрошлакового переплава
SU627076A1 (ru) Навесное приспособление к погрузчику
SU1680908A1 (ru) Опалубка дл бетонировани гидротехнических сооружений с наклонными и криволинейными гран ми
US2912123A (en) Luffing crane
SU567626A1 (ru) Устройство дл очистки вагонеток
GB171242A (en) Improvements in or relating to elevators for coal or the like
US3332674A (en) Travelling grate machine with drive