EP0099935A1 - Plate-forme de travail ajustable - Google Patents

Plate-forme de travail ajustable Download PDF

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Publication number
EP0099935A1
EP0099935A1 EP82106761A EP82106761A EP0099935A1 EP 0099935 A1 EP0099935 A1 EP 0099935A1 EP 82106761 A EP82106761 A EP 82106761A EP 82106761 A EP82106761 A EP 82106761A EP 0099935 A1 EP0099935 A1 EP 0099935A1
Authority
EP
European Patent Office
Prior art keywords
platform
motor
gear
rotation
adjustable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82106761A
Other languages
German (de)
English (en)
Other versions
EP0099935B1 (fr
Inventor
Andrej Dipl.-Ing. Simnovec
Bernhard Meinken
Friedrich Dipl.-Ing. Schwing
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to DE8282106761T priority Critical patent/DE3267285D1/de
Priority to AT82106761T priority patent/ATE16379T1/de
Priority to EP82106761A priority patent/EP0099935B1/fr
Priority to CA000444775A priority patent/CA1220434A/fr
Publication of EP0099935A1 publication Critical patent/EP0099935A1/fr
Application granted granted Critical
Publication of EP0099935B1 publication Critical patent/EP0099935B1/fr
Priority to US07/105,961 priority patent/US4799573A/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
    • E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck

Definitions

  • the invention relates to an adjustable person platform according to the preamble of claim 1.
  • the mast is usually composed of several sections or sections, the lower section of which is usually referred to as the basic boom and the end piece is usually referred to as the plane.
  • the sections of the mast are connected to each other via swivel joints with mostly hydraulically actuated thrust piston gears and can be folded in one plane.
  • the basic boom is mostly in this Swivel plane articulated to a column of a slewing gear.
  • the slewing gear is used to determine the possible lateral offset of the platform in relation to a fixed point. This can either be fixed or mobile. In the latter case, the mast forms the structure of a vehicle, usually a series truck.
  • the invention is based on a known device of this type (DE-OS 28 19 256).
  • the adjustable platform is designed as a change or attachment for a truck loading crane. This in turn can be operated remotely.
  • the controller the controlled variable of which is the possible inclination of the passenger platform against the horizontal, ensures that it is kept independent of the movement of the lifting mast end within the narrow limits prescribed for safety reasons of about 5 ° on both sides.
  • One embodiment of this previously known personal platform provides an electric geared motor as a drive for the swivel joint.
  • This has the considerable advantage of using different media, namely the hydraulic medium for the adjustment of the mast and the electrical medium for the drive of the passenger platform, whereby the work platform is brought into its horizontal position in the event of failure of the hydraulic mast drives, which are then blocked can.
  • the gear has a worm input stage, the worm wheel of which is fixed to the housing and has internal teeth for a spindle.
  • This Gearbox is rotatably and articulated in addition to the swivel joint of the support arm on the mast and on the support arm of the platform. In this way, the relatively high speed of the electric drive motor is reduced to the slow rotation of the support arm in the swivel joint.
  • the known reduction gear is self-locking. Vibrations of the passenger platform can, however, cancel the self-locking of the transmission and, if the electrical power fails, the platform can become increasingly skewed, which cannot be corrected.
  • a brake must be installed in the swivel joint in order to eliminate the associated risks in a safe manner. In an emergency, the timely actuation of this brake poses considerable difficulties according to the invention, which lead to accidents which are in themselves avoidable can. It is also disadvantageous that, with the hydraulic system of the mast remaining intact, no corrections to the platform position can be made if the electrical power fails.
  • an adjustable passenger platform which interacts not permanently with an existing crane mast as a lifting mast, but rather with a lifting mast specially designed for the needs of the working platform, in particular for its desired range, and is consequently permanently attached to the lifting mast end (DE-OS 29 01 786).
  • the horizontal position of the person platform is compulsorily maintained by a controller.
  • the lifting mast is usually longer than a mobile-type crane mast and therefore has a correspondingly larger working area. This requires increased swivel angles of the swivel joints of the mast sections, which are designed so that the mast, which is enlarged in length, can be placed in a folded position in which its sections are parallel and in which it can be transported more easily.
  • Such a lifting mast requires a considerably increased swivel angle on the swivel joint of the support arm compared to the previously known, electrically driven swivel joint. Therefore, these known designs use a hydraulic thrust piston transmission as a drive, the swivel angle of which could be increased to 240 ° via mechanical steering gear and also subdivides the arm with another swivel joint of this type. Then, however, the distribution of two drive media is based on that Support arm swivel and the mast swivel no longer feasible. On the other hand, safety concerns arise because the swivel joint and the adjustment of the lifting arm must be carried out with the hydraulic medium, so that the position of the passenger platform can no longer be corrected if the hydraulic system fails.
  • control chain comprising the control device is extremely complicated and unsatisfactory because it has to work with hydraulic and electrical energy. This results in particular in the problem of the control chain fluttering around the setpoint, which leads to considerable vibrations on the passenger platform. ;
  • the weight of the lifting arm is relatively large because the pushing piston gears that serve to drive the supporting arm and are filled with working fluid and their handlebar ratios that are used are very heavy.
  • the invention has for its object to form the initially known presupposed adjustable person platform so that it can be used not only as a changing device, but as a permanently attached work tool with a versatile adjustable mast and offers greater security for those on the platform .
  • the limitation of the angle of rotation of the support arm of the person platform in both directions of rotation of the motor is completely eliminated by the gear train, so that the person platform can be used together with any adjustable mast types. Due to its design, the gear train is not sufficiently self-locking to prevent the platform from swinging in the support arm swivel. It is made usable for the invention by the directional clutches. With these clutches, the switching process depends on the direction of the relative rotation between the input and output member. By using several, i.e. in particular two of these e.g.
  • the invention therefore has the advantage that it avoids, in a particularly simple manner, the hitherto complicated design and the associated high outlay and weight loads. It still allows a practically unlimited th work area of the passenger platform and can enable multiple use of complicated lifting masts, in particular as a changing device.
  • the use of fast running drive motors e.g. of pneumatic and hydraulic drive motors possible because it has been found that the torques required on the support arm can be applied by such motors with relatively low power.
  • the division of the transmission proposed for this purpose according to the invention has the advantage that a reduction can be achieved with the worm stage, which e.g. Is 1: 8 and makes it possible to level the platform with a few turns of the handwheel in the event of danger.
  • the epicyclic gear output stage has the advantage that the breaking loads required when the platform is overloaded are easy to achieve because of the constant engagement of several gears and therefore a simple and light design is made possible overall.
  • an electric drive type of the support arm pivot joint of the passenger platform can be realized, which manages with high-speed DC motors.
  • disc rotors are DC motors, the rotor of which consists of an iron-free synthetic resin disc with current conductors attached to it, with nominal speeds between 2100 rpm and 4500 rpm and maximum speeds up to 6000 rpm.
  • the in-line planetary gear enables in cooperation with the worm input stage a sufficient reduction of these high speeds.
  • the runners have a bell-shaped winding basket, which is enclosed on the inside and outside by the field.
  • a particularly expedient embodiment of the invention is possible with a lifting mast that has a very large working area (claim 5).
  • a lifting mast that has a very large working area (claim 5).
  • Such a mast in particular makes it possible to reach over or under parts of the building.
  • a structure, generally designated 2 is provided on a standard truck chassis 1, which is connected to the side members of the vehicle chassis.
  • the structure has a plurality of lateral supports 3 and 4, which in turn are designed as telescopic, preferably hydraulically driven booms 5 with drive by a hydraulic thrust piston transmission formed by a cylinder 6 or a piston rod 7 and have bottom supports 8 at their tips, which in turn are formed by a hydraulically actuated cylinder 9 and an extendable piston rod 10 with a base plate 11.
  • a slewing ring which is not shown, but which has a vertical column 19, which is around the kingpin of the slewing ring can move. It is used for displacing a swivel joint 12 with a drive 13 of a thrust piston pivot gear 14.
  • the pivot 12 includes a base section 15 to the column 1 9 at whose tip an additional pivot joint 16 transmits having a pivot drive 17th
  • the swivel drive 17 also has as a motor a thrust piston gear 18 with a lever ratio 20.
  • the swivel joint 16 serves to connect a middle piece 21 to the basic boom 15.
  • the free end of the middle piece 21 carries a swivel joint 22, which in turn is provided with a drive 23 which consists of a thrust piston 24 and a link mechanism 25 and in turn is effective like the transmission 17 and over a swivel angle of 180 °.
  • the swivel joint 22 is used to connect a flyer 26 which, with the help of the swivel gear 23 and corresponding actuation of the two further swivel gears 13 and 17, is folded in under the middle piece 21 and over the basic boom 15, i.e. can be "rolled folded".
  • the device described so far is known in principle. So far, however, it has only served as a concrete placing boom, i.e. on the mast sections 15, 21 and 26 pipes are fastened, which are connected to one another via pipe joints or hoses and through which concrete is pressed by a concrete pump displaced on the chassis 1 and connected to the structure 2.
  • this device is redesigned so that the end 28 of the flyer 26 is designed as a half 29 of a clutch 30, the two halves 29, 31 of which are screwed together. J ung 33 have that can be solved at any time. 3, a coupling 32 can be screwed, the coupling half 34 is fastened to one end of the coupling 32, the other end of which is used to displace a tube 35 to which a hose 36 is connected.
  • the hose 36 forms the end of the concrete line starting from the concrete pump described, which is guided over the placing boom, the hose 36 making it possible to distribute the concrete on the building surface to be concreted.
  • an adjustable platform 38 can be attached to the aircraft 26, which in principle consists of a basket 39 which has a grid 40.
  • a rigid arm 42 is attached at 41, which projects upwards at right angles to the plane of the platform 38 and has a swivel joint 43, with which the platform 38 is connected to the coupling piece 31 and thus to the flyer 26.
  • the swivel joint 43 enables the arm 42 to be pivoted in the plane of the swivel joints 12, 16 and 22 of the lifting mast explained above.
  • FIG. 4 One of the possibilities made possible by the overall arrangement consisting of the adjustable passenger platform 38 and the lifting mast described is shown in FIG. 4.
  • the bridge plate 50 of an elevated road 52 which, as shown at 53, is elevated.
  • the various swivel drives 13, 17 and 23 the Adjust the mast from its folded - roll-folded - position, as described above, in such a way that its basic boom, its boom center piece 21 and its flyer 26 form an open U in the direction of the stand 53 of the bridge plate 50, the platform 38 in during the entire pivoting movement to be described horizontally.
  • the folding back of the mast into the rolled-up position is shown in FIG. 4.
  • FIG. 4 shows a possible working position of the platform 38 for inspection work
  • FIGS. 5 and 6 show the use of the working platform 38 as a rescue device. It is assumed that, in the case of FIG. 4, the rear side 54 of the building 55 shown cannot be reached from the street 56 on which the truck 1 is installed. As can be seen from FIG. 5, in this case the rear side 54 of the building 55 can be reached via the roof 57.
  • a high-rise building 58 is selected as an exemplary embodiment, which is designed with a high-rise building 60 placed on a low-rise building 59. Via the low-rise wing section 59 projecting far in the direction of the street 61, the lifting tower can be reached from the sections 15, 21 and 26 with the work platform 38 with the work platform 38 as shown.
  • the adjustable platform 38 is connected with the free end 63 of its arm 42 to the output shaft 64 of a gearbox, generally designated 65, that is to say connected to the shaft in a rotationally fixed manner.
  • the gearbox has one Input stage 66 with one or more worm gear stages. This is followed by an epicyclic gear 67, the details of which can be seen in particular from the illustration in FIG. 7.
  • the gearbox housing generally designated 68 and flanged to the end 28 of the F liegers.
  • the housing of a control system is shown at 69, which will be described with reference to FIG. 10 and which essentially has a control device comprising an electrical inclinometer, which holds the platform 38 horizontally.
  • eccentric loads for example, consisting of work equipment or people, can also be predefined at 71 about the geometric axis 70 of the transmission output shaft 64.
  • FIG. 7 The details of the transmission are shown in FIG. 7. Thereafter, a Schencke 73 sits on the input shaft 74 of the transmission part 66, on the housing 74 of which the motor housing is flanged as shown at 76 in FIG. 8.
  • the worm drives a worm wheel 79 which is fixed on a shaft 80 which has a first direction-switched clutch, which is followed by a further clutch 82 connected in the opposite direction. This results in an effective backstop in both directions of rotation of the support arm.
  • the shaft 80 is hollow and makes it possible to connect in this way a shaft 83 to, for example, with K lemm bodies working clutch 81st
  • the free end of the shaft 83 carries a handwheel 84 with a crank 85.
  • the crank 85 (FIG. 8) can be reached from the platform 38 and enables the gear 67 instead of the gear part 66, ie the worm 73 and the To drive worm wheel 79 from outside via hollow shaft 80 with shaft 83.
  • the input shaft 87 of one composed of three stages Series planetary gear 67 At the output 86 of the backstop 81, 82 there is the input shaft 87 of one composed of three stages Series planetary gear 67.
  • the reduction stages run from A to the output shaft 64 of the gear B. They are identified by I, I and I ".
  • the reductions are With a diameter of the handwheel of 125 mm, the gear can be turned with the crank 85.
  • the voltage supply of the fast running electric motor 97 consists of a 12 V battery 91, which can have a capacity of 20 Ah. It is powered by the vehicle's on-board battery, which can have a voltage of 24 V. The charging of the battery is monitored by an electrical charge control. This constantly compares the voltage of the supply battery with that of the on-board battery. Overcharging of the supply battery91 is therefore excluded.
  • the electrical inclinometer 92 as a transmitter is located in a two-chamber housing and consists of a pendulum that is dampened with glycerin.
  • the pendulum is connected to a servo potentiometer, from which the electrical signals are taken.
  • Each voltage change is applied to the electronic threshold circuit 94a, 94b via an integrator 93 and compared with adjustable setpoints. In the circuit shown, these can be ⁇ 2 °, 0 ° ⁇ 8 ° gene.
  • the thyristors for the control 96 of the electric drive motor 7 are ignited via the power stage 95, which can be designed as a disk or bell-type rotor motor.
  • the second threshold switch 94b detects this, which at 8 ° gives a signal to a power contactor which switches the system off. The platform can then be moved using the hand crank 85.
  • an extension piece 100 is screwed onto the flyer 26 of the mast via the connection 30.
  • the extension piece 100 consists of a carrier 101, which is designed as a box-shaped hollow carrier made of glass fiber reinforced plastic. This hollow beam is permanently attached to the steel coupling half 31 with several connections 102.
  • An end section 104 of an optical fiber cable is passed through the cavity 103 of the carrier 101 and can be connected with the aid of a coupling 105 to the feed line 106 guided through the lifting mast and with a further coupling 107 to the control unit (not shown).
  • the power supply is provided by a panel 109 provided with solar cells 108. Insulators 110, thereby and.
  • the output shaft 64 of the transmission 65 forms the rotatable part of the joint 43
  • the transmission housing 68 represents the fixed part of the joint 43.
  • This gear housing has a flange which can be screwed to the end of the lifting arm or to the attachment piece 32 with a counter flange. Since the motor housing, in turn, as shown at 76 in FIG. 8, can be flanged onto the gear housing 68, a changeover device results, which, however, can also be permanently attached to a lifting mast.
  • the output shaft 64 forming the rotatable part of the joint 43 can be connected to the lifting arm 42 with a wedge coupling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Jib Cranes (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Types And Forms Of Lifts (AREA)
  • Bridges Or Land Bridges (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Revetment (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP82106761A 1982-07-27 1982-07-27 Plate-forme de travail ajustable Expired EP0099935B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8282106761T DE3267285D1 (en) 1982-07-27 1982-07-27 Adjustable personnel platform
AT82106761T ATE16379T1 (de) 1982-07-27 1982-07-27 Einstellbare personenplattform.
EP82106761A EP0099935B1 (fr) 1982-07-27 1982-07-27 Plate-forme de travail ajustable
CA000444775A CA1220434A (fr) 1982-07-27 1984-01-05 Plate-forme orientable pour passagers
US07/105,961 US4799573A (en) 1982-07-27 1987-10-02 Adjustable personnel platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82106761A EP0099935B1 (fr) 1982-07-27 1982-07-27 Plate-forme de travail ajustable

Publications (2)

Publication Number Publication Date
EP0099935A1 true EP0099935A1 (fr) 1984-02-08
EP0099935B1 EP0099935B1 (fr) 1985-11-06

Family

ID=8189146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106761A Expired EP0099935B1 (fr) 1982-07-27 1982-07-27 Plate-forme de travail ajustable

Country Status (5)

Country Link
US (1) US4799573A (fr)
EP (1) EP0099935B1 (fr)
AT (1) ATE16379T1 (fr)
CA (1) CA1220434A (fr)
DE (1) DE3267285D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368121A (zh) * 2016-09-29 2017-02-01 南京祖航航空科技有限公司 一种吸顶式探测装置
CN112458986A (zh) * 2020-11-11 2021-03-09 徐州盛德电动车有限公司 便于维修的路面养护车

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623631C1 (en) * 1986-07-12 1987-08-13 Karl Dipl-Ing Schlecht Distributor mast
CA2055864C (fr) * 1991-11-19 1995-07-25 Howard W.S. Derksen Plate-forme - nacelle elevatrice
DE4233171A1 (de) * 1992-10-02 1994-04-07 Putzmeister Maschf Betonverteilermast
US6170606B1 (en) 1996-06-28 2001-01-09 Safety Dynamicon, Inc. Analog control
US5944138A (en) * 1997-09-03 1999-08-31 Altec Industries, Inc. Leveling system for aerial platforms
US6044929A (en) * 1999-01-27 2000-04-04 Wishner; David Matthew Ladder leveling device
KR100485818B1 (ko) * 2002-08-26 2005-04-28 씨에스기계 주식회사 무인 교량점검차량
US8550211B2 (en) * 2005-02-10 2013-10-08 Altec Industries, Inc. Aerial work assembly using composite materials
US20100059314A1 (en) * 2008-09-09 2010-03-11 C & W Manufacturing and Sales Company Inspection Platform
IT1392128B1 (it) * 2008-12-03 2012-02-22 Silver Bull Gmbh Srl Piattaforma semovente alzabile.
US8443936B1 (en) 2010-11-15 2013-05-21 Timothy James Raymond Self-contained work platform attachment for mobile cranes
CN102635066B (zh) * 2012-04-17 2015-04-22 武汉武大巨成结构股份有限公司 一种吊架铰接式桥梁检修车
US8857567B1 (en) 2012-06-14 2014-10-14 Timothy James Raymond Self-contained powered jib boom and optional work platform attachment for mobile cranes
CN102797222B (zh) * 2012-07-24 2014-09-24 武汉武大巨成结构股份有限公司 一种能避让桥侧障碍的吊架铰接式桥梁检修车
US9162861B1 (en) * 2014-04-18 2015-10-20 Westchester Capital, Llc Dielectric support arm for a yoke platform
JP6486771B2 (ja) * 2015-05-27 2019-03-20 前田建設工業株式会社 構造物の点検装置、及び点検方法
US10273132B2 (en) * 2015-12-21 2019-04-30 Altec Industries, Inc. Isolated electronic backbone architecture for aerial devices
CN112451939B (zh) * 2020-10-30 2021-09-28 温州大学 一种新型可调节式电动篮球架

Citations (11)

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Publication number Priority date Publication date Assignee Title
US1967376A (en) * 1933-01-31 1934-07-24 American Telephone & Telegraph Adjustable aerial platform
FR52541E (fr) * 1941-02-20 1945-04-17 Appareil de levage
FR1101852A (fr) * 1954-03-27 1955-10-11 Fernand Geneve Dispositif de commande de l'orientation de la plateforme de travail d'une échelle
FR1553126A (fr) * 1967-12-01 1969-01-10
US3590948A (en) * 1970-02-10 1971-07-06 Baker Equipment Eng Co Basket-leveling system for boom structures
FR2106543A3 (fr) * 1971-09-15 1972-05-05 Harrison John
US3860088A (en) * 1974-02-14 1975-01-14 Gen Cable Corp Aerial lift platform leveling apparatus and system
FR2347304A1 (fr) * 1976-04-05 1977-11-04 Falck Schmidt As Dispositif de levage a plate-forme de travail a controle automatique
US4116304A (en) * 1977-04-25 1978-09-26 Durnell Engineering, Inc. Aerial personnel lift including means for automatically controlling the position of the personnel bucket
DE2819256A1 (de) * 1978-05-02 1979-11-08 Franz Huebner Arbeitskorb an lkw-ladekraenen
DE2901786A1 (de) * 1979-01-18 1980-07-24 Harald Traeger Selbstfahrende arbeitsbuehne

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US2483811A (en) * 1945-09-10 1949-10-04 Cullen Friestedt Company Work postioner
US2938594A (en) * 1959-04-09 1960-05-31 Jay M Eitel Vehicle and lift construction
US4051923A (en) * 1976-10-20 1977-10-04 Lionel Blanchette Cableless cage elevator
NL8006889A (nl) * 1979-12-20 1981-07-16 Ricoh Kk Inrichting voor het scheiden en transporteren van beeldoverdrachtmateriaal voor elektrofotografische copieerinrichtingen,

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967376A (en) * 1933-01-31 1934-07-24 American Telephone & Telegraph Adjustable aerial platform
FR52541E (fr) * 1941-02-20 1945-04-17 Appareil de levage
FR1101852A (fr) * 1954-03-27 1955-10-11 Fernand Geneve Dispositif de commande de l'orientation de la plateforme de travail d'une échelle
FR1553126A (fr) * 1967-12-01 1969-01-10
US3590948A (en) * 1970-02-10 1971-07-06 Baker Equipment Eng Co Basket-leveling system for boom structures
FR2106543A3 (fr) * 1971-09-15 1972-05-05 Harrison John
US3860088A (en) * 1974-02-14 1975-01-14 Gen Cable Corp Aerial lift platform leveling apparatus and system
FR2347304A1 (fr) * 1976-04-05 1977-11-04 Falck Schmidt As Dispositif de levage a plate-forme de travail a controle automatique
US4116304A (en) * 1977-04-25 1978-09-26 Durnell Engineering, Inc. Aerial personnel lift including means for automatically controlling the position of the personnel bucket
DE2819256A1 (de) * 1978-05-02 1979-11-08 Franz Huebner Arbeitskorb an lkw-ladekraenen
DE2901786A1 (de) * 1979-01-18 1980-07-24 Harald Traeger Selbstfahrende arbeitsbuehne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368121A (zh) * 2016-09-29 2017-02-01 南京祖航航空科技有限公司 一种吸顶式探测装置
CN112458986A (zh) * 2020-11-11 2021-03-09 徐州盛德电动车有限公司 便于维修的路面养护车

Also Published As

Publication number Publication date
CA1220434A (fr) 1987-04-14
ATE16379T1 (de) 1985-11-15
DE3267285D1 (en) 1985-12-12
EP0099935B1 (fr) 1985-11-06
US4799573A (en) 1989-01-24

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