EP0135452B1 - Hubeinrichtung mit wenigstens einem Teleskopmast - Google Patents
Hubeinrichtung mit wenigstens einem Teleskopmast Download PDFInfo
- Publication number
- EP0135452B1 EP0135452B1 EP84420123A EP84420123A EP0135452B1 EP 0135452 B1 EP0135452 B1 EP 0135452B1 EP 84420123 A EP84420123 A EP 84420123A EP 84420123 A EP84420123 A EP 84420123A EP 0135452 B1 EP0135452 B1 EP 0135452B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pillar
- platform
- chassis
- distinguishing feature
- elevator according
- 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
Links
- 230000005484 gravity Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 230000004048 modification Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000003019 stabilising effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the present invention relates to an elevator comprising at least one telescopic mast.
- elevators comprising a platform or a nacelle making it possible to have one or more operators work at a certain height above the ground, for example for the maintenance or repair of building facades, high-rise lampposts, maintenance of hangars, etc.
- a first type of elevator concerns hydraulic elevators comprising a gondola that can accept one or two people.
- the elevation is obtained by the movement of mechanically welded arms hinged together and generally controlled by hydraulic cylinders. Besides the fact that they are very expensive, these devices are bulky when folded to the ground.
- Another type of elevator comprises a working platform animated by a vertical elevation movement obtained by the action of one or more hydraulic cylinders acting on a device of arms articulated together according to the technique known as "of chisel".
- These devices are heavy and expensive, and have, from a functional point of view, the disadvantage of a significant limitation in height.
- a third type of elevator comprises a nacelle or working platform fixed to the end of a telescopic central mast, the vertical elevation movement being obtained by deployment of this mast using hydraulic or mechanical means.
- elevators comprising two telescopic masts disposed at two ends of the working platform, the vertical movement of the platform being obtained by simultaneous deployment or telescoping of the two masts from a single manual or electric winch.
- the present invention aims to remedy these drawbacks.
- the elevator that it relates to of the type comprising at least one telescopic mast articulated on a substantially horizontal frame near one of its ends around a horizontal axis (FR-E 2 294 980), the axis of articulation of the mast on the chassis is located in a horizontal plane above the upper plane of the chassis, to allow the housing of the platform between the chassis and the mast, when the latter is folded the horizontal, the platform remaining associated with each mast when the latter is horizontal.
- This elevator has the advantage of being reduced in size and of constituting a complete device not requiring the addition of additional parts for the passage from the folded position to the unfolded position.
- the fact that in the folded position the masts are above the chassis allows, in addition to the housing of the platform, the housing of other members such as the motor for actuating the masts and the platform. form.
- This elevator is equipped with means allowing, at first, the pivoting of each mast from its horizontal position to the vertical position, then the deployment of the masts and the displacement of the platform along them.
- the automation of the means of actuation of the masts and of the platform allows a single operator to set up and deploy the elevator at the workplace without other operations than controlling the motorization of the masts and the platform.
- this breeder comprises several masts, associated with two opposite ends of the platform, the different masts are offset with respect to each other so as to pivot in parallel planes sufficiently distant from each other, so that the different masts can be juxtaposed in the same horizontal plane in the folded position.
- each mast is constituted by several telescopic tubular profiles fitted into one another, of which that of larger section comprises, on its face facing the middle of the apparatus, two profiles longitudinal forming guide rails for a carriage of the platform and of which that of smaller section, of length greater than that of the other profiles, is equipped, in its projecting portion thereof in the nested position of the different profiles, of two rails arranged in the extension of the previous ones, the means for driving the platform and for sliding the elements of each mast being such that, starting from the low position of the platform form, it is moved upwards until each carriage is engaged in the rails of the sections of smaller section, before the start of the sliding towards the outside of the different sections constituting the masts.
- the elevator shown in Figures 1 to 10, comprises a horizontal frame (2) formed by a frame mounted on casters (3).
- this chassis could be placed on the platform of a vehicle, on a trailer, or be self-propelled depending on the desired use.
- This chassis carries, at each of its ends, two series of supports (4) offset laterally with respect to each other, each series of supports (4) carrying, at its upper end, an axis (5) serving to the articulation of a mast (6).
- the axes of articulation (5) of the masts (6) are parallel and arranged in a horizontal plane situated above the chassis (2).
- each mast is arranged so that when it is in the vertical position, the vertical line passing through its center of gravity is located between the axis of articulation and the center of the 'apparatus, thus facilitating the tilting of the masts towards the horizontal position.
- Each mast (6) comprises three telescopic parts, each of which consists of two spacer elements.
- Each element (7) has a double U shape, a groove (8) for housing and fixing spacers (9) ensuring its connection with the other element (7), and a groove (10) for guiding an element (7) of immediately lower section, or rollers (12) for the element of smaller section.
- the rollers (12) belong to a carriage (13) associated with each mast.
- this carriage includes four braced rollers.
- One of the carriage spacers (13) has two vertical and parallel yokes (14) used for articulation about an axis parallel to the articulation axes (5) masts, a frame (15) carrying the platform (16). As shown in the drawing, this is fitted, in a known manner, with a railing (17), in the areas which are not located opposite the masts.
- each mast (6) is equipped with a system ensuring its locking in the vertical position.
- This system comprises two douboards (18) integral with the chassis (2) forming strikes into which penetrate two bolts constituted by two rods (19) slidably mounted longitudinally to the mast in sleeves (20) and each subjected to the action of a spring (22) tending to cause the rod (19) to protrude from the lower end of the mast.
- each bolt (19) enters a keeper (18) at the end of the pivoting movement.
- This locking can only be released manually, for example using a stop (23) holding the bolts in the extended position, as shown in FIG. 7, requiring the operator to descend from the platform to unlock manually the two masts. This avoids that, as a result of a false maneuver, the operator causes the folding of the masts, while he is still on the platform.
- Each mast is also equipped with a locking system for the various parts constituting it, when they are in the retracted position one inside the other.
- This system comprises a plate (24) integral with the second part of telescopic elements, comprising a central orifice (25) into which is intended to penetrate a rod (26) integral with the external part of the mast.
- This rod (26) is integral with a plate (27) connected by two columns (28), parallel to the rod (26), to another plate (29) located on the other side of the plate (24) by relative to the rod (26).
- Such an arrangement is advantageous because allowing the drive system, the operation of which is described below, to act only for the pivoting of the mast, as long as the latter is not in the vertical position.
- the elevator drive means are constituted by an electric motor (33) located at the lower part of the chassis, comprising an output shaft on which two drums (34) are wedged on which two cables (35) are wound, according to reverse windings, each cable being associated with a mast.
- Each cable (35) first passes over a pulley (36a) secured to the chassis.
- the axis of this pulley like the axis of all the other pulleys described below, is parallel to the pivot axis of the mast in question.
- the cable (35) then passes over two pulleys (36b) and (37) mounted respectively at the lower and upper ends of the part of the largest section of the mast.
- the free end of the cable (35) is fixed at (38) to the lower end of the second part of the mast.
- a second cable (39) passing over a pulley (40) disposed at the upper end of the second part of the mast is fixed by its ends, respectively, at (42) at the high end of the part of larger section of the mast and in (43) in the lower part of the third part of the mast.
- a cable (44) passing over a pulley (45) in the upper part of the mast is fixed at its ends, at (46) at the upper end of the second part of the mast and at (47) on the platform. form.
- the operator can then take place on the platform and control the continuation of the winding of the cables (35) on the drums (34). This operation is reflected by the cable circuit described above by the deployment of the telescopic parts of the two masts and the movement up the platform in the elements of the third telescopic part to reach the position shown in the figure 1.
- each rod (26) engages in the plate (24), releasing the corresponding stop (23) and allowing the bolts (19) to exit under the action of the springs (22).
- the mast (50), shown in FIG. 11, is made from three tubular profiles capable of fitting into each other, respectively a profile (52) of large section, a profile (53) of intermediate section, and a profile (54) of small section.
- a profile (52) of large section On the face of the profile (52) turned towards the middle side of the device, are fixed two U-shaped profiles (55) forming guide rails for a carriage.
- the section (54) of smaller section is of greater length than that of the sections (52) and (53) so as to protrude therefrom when the three mast elements are in the nested position.
- On the part of the profile (54) projecting from the other two profiles are fixed two rails (56) arranged in the extension of the rails (55). The length of the rails (56) is sufficient to receive a support carriage for the platform (16).
- the tilting movement of each mast and relative movement of the different elements of it is obtained from an electric motor (57) integral with the chassis, the output shaft of which drives as many drums (58) as the elevator has masts.
- On the drum (58) is wound a cable (59) passing successively on pulleys (60) and (62) arranged in the lower part and in the upper part of the element (52), (63 and 64) arranged in the lower part and in the upper part of the element (53) and (65 and 66) disposed, respectively, in the lower part and in the upper part of the element (54), the free end of the cable being fixed at (67) on the platform (16) or the drive means thereof.
- the carriage (13) having the structure described above is mounted on a plate (68) with the possibility of a slight axial displacement.
- This plate (68) has a hole (69) near its upper end for hanging the cable (59) and a hole (70) near its lower end for engaging a locking finger (72 ).
- the finger (72) fulfills a function similar to that of the finger (26) described above and the means used identical to those which have been described bear the same reference.
- the finger (72) is released from the hole (70).
- the finger (72) locks the plate (68), the carriage (13) being capable of sliding slightly along the plate (68), as shown in FIG. 15, to take into account the distance between the respective articulation axes of the mast on the chassis and the platform on the carriage.
- FIGs 16 and 17 show an alternative embodiment of the device shown in Figures 13 to 15.
- the carriage is rigidly mounted on a plate (68a) allowing a locking relative to the mast and the hanging of the cable (59).
- the mounting of the platform (16) on the carriage is carried out by means of a rod (73) engaged in open rings (74) integral with the carriage (13), and closed by the intermediate locks (75) when the masts are in vertical position.
- the latches (75) are actuated in the open position by pressing which they take on fingers (76) integral with the chassis.
- the platform (16) can thus escape the rings (74) and is disconnected from the carriages (1 3) resting directly on the chassis, as shown in Figure 17.
- the rods (73) of the platform (16) automatically lock into the rings (74).
- FIGS 18 and 19 show another alternative embodiment in which the platform (16) is rigidly mounted on a carriage (76).
- carriage guide means (76) are constituted not only by the rails (55 and 56) of the masts, but also by rails (77) integral with the chassis which, in the vertical position of the masts, extend the integral rails. of these.
- FIGS 20 to 23 of the drawing show an elevator equipped with a base for raising the chassis.
- elevators of this type are often used for maintenance and repair work in factories, warehouses or department stores to carry out work at height on ventilation and heating ducts, electric cables, devices lifting, etc ....
- the premises being most often congested with machines or other fixed elements, it is not possible to position anywhere at ground level, the chassis of an elevator.
- the elevator according to the invention can be equipped with an elevation base comprising two pairs of crutches (82), each of which has, on the one hand, means of attachment to a mast (6) and, on the other hand, fixing means on the chassis (2).
- each stand (83) has, in its upper part, two series of holes (84, 85) intended to cooperate with a series of holes (86, 87) formed, respectively, in a mast (6) or in the frame (2) for attachment to one or the other of these two elements.
- each stand (83) is equipped, at its lower end, on the one hand, with a wheel (88) and, on the other hand, a support pad (89) mounted at the end of a screw jack (90) with a longitudinal axis to the stand.
- the two pairs of crutches (82) are fixed on the two masts (6) when these are in a horizontal position, with location of the holes (84, 86) according to the desired heightening of the chassis (2). Then, as shown in FIG. 21, the masts (6) are tilted, movement during which the wheels (88) are supported on the ground.
- the elevator is then positioned at the place of use, for example above a machine (92) after which, by using the jacks (90), it is placed in stable support on the pads (89), as shown in figure 22.
- FIGS. 24 to 28 represent a single mast elevator, comprising, like the elevator described above, a frame (2) near one end of which is arranged a pair of supports (4) at the upper part of which is articulated around a horizontal axis (5), the mast (93).
- the mast is formed not by open sections, but by a lower section (94) of larger tubular section, the following elements (95, 96) being tubular sections of which the one (95) is slidably mounted in that (94) and of which that (96) is slidably mounted in that (95).
- the internal profile (96) is equipped, at its upper end, with a tubular part (97) of the same section as the element (94), and coming to extend the latter when the different elements of the mast are fitted one in others.
- This elevator is equipped with a nacelle (98), the guidance of which on the mast (93) is achieved by means of a belt (99) bearing on the periphery of the mast by means of rollers (100) .
- the nacelle is firstly moved along the element (94), then along the extension (97) of the profile interior (96); it is only afterwards that the sections (94, 95, 96) are removed from each other to continue the elevation of the nacelle.
- the operations are carried out in reverse order.
- This solution makes it possible to have a peripheral guide path on the mast, of constant section, while benefiting from the advantages of the telescopic elements.
- Each basket presents, in side view. a deformable parallelogram-like structure.
- the edge (102) of the floor of the nacelle bears against the frame (2) of the elevator, which results in the pursuit of the movement by the deformation of the parallelogram which takes the form of a flattened diamond.
- the diagonal (102, 103) ensures the holding of the nacelle, in the position of use thereof.
- FIG 28 shows the mast locking means.
- a part (104) inside which slides longitudinally to the mast a spindle (105) whose lower end forms a cylindrical bolt (106) intended to come to engage in a part (107) integral of the striker frame.
- This device also comprises a spindle (108) sliding transversely to the mast, intended to penetrate into a plate (109) secured to the carriage carrying the nacelle.
- the spindle (108) can only pass through an enlarged part (110) of an opening formed in the spindle (105) only when the latter is in the low position.
- Springs (112, 113) are associated with pins (105) and (108) respectively, which tend to move the latter towards their unlocked position.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Carpets (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Forklifts And Lifting Vehicles (AREA)
Claims (26)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84420123T ATE20333T1 (de) | 1983-07-11 | 1984-07-10 | Hubeinrichtung mit wenigstens einem teleskopmast. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8311920 | 1983-07-11 | ||
FR8311920A FR2549029B1 (fr) | 1983-07-11 | 1983-07-11 | Elevateur comportant au moins un mat telescopique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0135452A1 EP0135452A1 (de) | 1985-03-27 |
EP0135452B1 true EP0135452B1 (de) | 1986-06-11 |
Family
ID=9290931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84420123A Expired EP0135452B1 (de) | 1983-07-11 | 1984-07-10 | Hubeinrichtung mit wenigstens einem Teleskopmast |
Country Status (7)
Country | Link |
---|---|
US (1) | US4619346A (de) |
EP (1) | EP0135452B1 (de) |
AT (1) | ATE20333T1 (de) |
DE (1) | DE3460220D1 (de) |
FR (1) | FR2549029B1 (de) |
MA (1) | MA20170A1 (de) |
OA (1) | OA07744A (de) |
Families Citing this family (42)
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GB2219273B (en) * | 1988-05-11 | 1992-02-05 | Mark Richardson | Improvements in powered access platform units |
US4867277A (en) * | 1988-09-29 | 1989-09-19 | Sloan William C | Portable lifting device and cart |
US4944366A (en) * | 1989-02-06 | 1990-07-31 | D. L. Pryor & Sons, Inc. | Pneumatically operated scaffolding |
FR2643057B1 (fr) * | 1989-02-13 | 1991-05-10 | Coche Andre | Chariot ascenseur pour travail mobile en hauteur |
FR2646686B1 (fr) * | 1989-05-05 | 1991-12-27 | Chabot Stanislas De | Plate-forme elevatrice pour ebranchage forestier |
US5111907A (en) * | 1990-02-20 | 1992-05-12 | Japanic Corporation | Lifting apparatus |
DE4232949A1 (de) * | 1992-10-01 | 1994-04-07 | Josef Alois Huber | Hubvorrichtung |
US6123715A (en) | 1994-07-08 | 2000-09-26 | Amplatz; Curtis | Method of forming medical devices; intravascular occlusion devices |
US5846261A (en) * | 1994-07-08 | 1998-12-08 | Aga Medical Corp. | Percutaneous catheter directed occlusion devices |
WO1996004197A1 (en) * | 1994-08-01 | 1996-02-15 | Xxsys Technologies, Inc. | Apparatus and method for reinforcing vertical columns |
GB2323106B (en) * | 1997-03-20 | 2001-10-24 | Trilogy Entertainments Plc | Elevated accomodation assembly |
SE9801065D0 (sv) * | 1998-03-27 | 1998-03-27 | Alimak Ab | Anordning vid kuggstångsdrivna hissar, byggplattformar eller liknande |
DE29806602U1 (de) * | 1998-04-09 | 1999-05-12 | BISON stematec Maschinenbau- und Hubarbeitsbühnen Produktionsgesellschaft mbH, 02708 Löbau | Teleskopausleger für Hubarbeitsbühnen |
US6502667B1 (en) | 2001-03-08 | 2003-01-07 | Joycedayton Corporation | Ergonomic platform lift |
USD518269S1 (en) * | 2003-10-02 | 2006-03-28 | Crown Equipment Corporation | Work platform |
WO2006129129A2 (en) * | 2005-06-03 | 2006-12-07 | Monkey Tower Ltd | Collapsible access tower |
US7683512B2 (en) * | 2006-05-29 | 2010-03-23 | Shenzhen Han's Precision Mechatronics Co., Ltd. | Motor used to drive optical elements |
US20080230321A1 (en) * | 2007-03-19 | 2008-09-25 | Frank Csaszar | Portable freestanding elevator |
US20080302601A1 (en) * | 2007-06-06 | 2008-12-11 | Andrew Baker | Lift assembly |
US7874544B2 (en) * | 2008-03-05 | 2011-01-25 | Dana Monroe | Lifting device |
US8141683B1 (en) | 2009-04-30 | 2012-03-27 | Wurtec Elevator Products & Services | Expandable platform |
US8413764B1 (en) * | 2009-09-29 | 2013-04-09 | David A. Cohen | Ladder safety device, systems and methods of arresting falls from ladders |
US8662477B2 (en) * | 2009-12-16 | 2014-03-04 | Herkules Equipment Corporation | Belt-driven transportation system |
US8714524B2 (en) * | 2009-12-16 | 2014-05-06 | Herkules Equipment Corporation | Belt-driven transportation system |
US8733508B2 (en) | 2010-04-02 | 2014-05-27 | Herkules Equipment Corporation | Scissor lift assembly |
US8794386B2 (en) * | 2011-07-01 | 2014-08-05 | Cardinal Gibbons High School | Folding forklift |
US10597274B1 (en) * | 2011-11-15 | 2020-03-24 | Homecare Products, Inc. | Tower elevating assembly |
US9422142B2 (en) | 2013-08-01 | 2016-08-23 | Herkules Equipment Corporation | Scissor-type lift assembly |
CN103552956A (zh) * | 2013-11-12 | 2014-02-05 | 沈洪彬 | 一种升降台 |
CN104925682B (zh) * | 2015-05-20 | 2017-01-04 | 河北建工集团有限责任公司 | 高空作业平台用上料系统 |
US10160628B2 (en) * | 2016-03-24 | 2018-12-25 | Toyota Motor Engineering & Manufacturing North America, Inc. | Pneumatic lifting device |
US10053333B2 (en) * | 2016-09-27 | 2018-08-21 | Toyota Motor Engineering & Manufacturing North America, Inc. | Platform lift |
CN106430000B (zh) * | 2016-10-13 | 2018-07-03 | 国网山东省电力公司商河县供电公司 | 一种三级联动式电力辅助伸缩平台 |
US10633234B2 (en) * | 2016-11-18 | 2020-04-28 | Aaron Christopher Meyer | Modular observation assembly and method |
US10005652B1 (en) * | 2017-11-01 | 2018-06-26 | Kan Cui | Elevating lift with a stabilized movable base |
CN108358131A (zh) * | 2017-12-29 | 2018-08-03 | 佛山杰致信息科技有限公司 | 一种建筑机械的爬升装置 |
CN109626255A (zh) * | 2019-01-29 | 2019-04-16 | 珠海云洲智能科技有限公司 | 一种船用设备升降装置 |
US11951339B2 (en) | 2019-11-21 | 2024-04-09 | 3M Innovative Properties Company | Fall protection system |
CA3159212A1 (en) | 2019-11-21 | 2021-05-27 | 3M Innovative Properties Company | Fall protection system |
CN112249999A (zh) * | 2020-11-06 | 2021-01-22 | 浙江鼎力机械股份有限公司 | 一种电动升降式高空作业平台 |
US20220240497A1 (en) * | 2021-02-03 | 2022-08-04 | Joseph Albert PRICE | Extendable hunting stand with movable platform |
US12054364B2 (en) * | 2021-10-21 | 2024-08-06 | Fall-Botics, Llc | Personal safety and fall protection systems |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD39411A (de) * | ||||
US2632530A (en) * | 1950-07-03 | 1953-03-24 | Elmer A Wagner | Telescoping tower vehicle |
US2910203A (en) * | 1958-01-17 | 1959-10-27 | Harold J Bell | Truck loading and unloading device |
US3232382A (en) * | 1964-02-24 | 1966-02-01 | Buck Equipment Corp | Workman hoisting machine |
US3378101A (en) * | 1966-08-12 | 1968-04-16 | Franklin D. Zeitler | Scaffold |
CH504379A (de) * | 1969-03-12 | 1971-03-15 | Schellenberg Heinz | Fahrbare Hebe-Einrichtung |
US3515243A (en) * | 1969-05-06 | 1970-06-02 | Joseph R Ellen Jr | Lift device |
NL7303518A (de) * | 1972-04-06 | 1973-10-09 | ||
FR2294980A2 (fr) * | 1972-07-17 | 1976-07-16 | Sicoffe Sarl | Elevateur autonome perfectionne |
FR2192062B1 (de) * | 1972-07-17 | 1978-05-12 | Chapelle Charles | |
JPS5324080Y2 (de) * | 1973-04-05 | 1978-06-21 | ||
US4000789A (en) * | 1976-02-18 | 1977-01-04 | Edward Engel | Portable scaffold |
US4458785A (en) * | 1982-10-25 | 1984-07-10 | Bushnell Jr Sherman W | Lift |
-
1983
- 1983-07-11 FR FR8311920A patent/FR2549029B1/fr not_active Expired
-
1984
- 1984-07-10 DE DE8484420123T patent/DE3460220D1/de not_active Expired
- 1984-07-10 MA MA20394A patent/MA20170A1/fr unknown
- 1984-07-10 EP EP84420123A patent/EP0135452B1/de not_active Expired
- 1984-07-10 AT AT84420123T patent/ATE20333T1/de not_active IP Right Cessation
- 1984-07-11 OA OA58338A patent/OA07744A/xx unknown
- 1984-07-11 US US06/629,682 patent/US4619346A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US4619346A (en) | 1986-10-28 |
OA07744A (fr) | 1985-08-30 |
EP0135452A1 (de) | 1985-03-27 |
FR2549029A1 (fr) | 1985-01-18 |
FR2549029B1 (fr) | 1987-01-30 |
DE3460220D1 (en) | 1986-07-17 |
ATE20333T1 (de) | 1986-06-15 |
MA20170A1 (fr) | 1985-04-01 |
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