WO2003082727A1 - Telescopic multistage lifter - Google Patents

Telescopic multistage lifter Download PDF

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Publication number
WO2003082727A1
WO2003082727A1 PCT/EP2003/003454 EP0303454W WO03082727A1 WO 2003082727 A1 WO2003082727 A1 WO 2003082727A1 EP 0303454 W EP0303454 W EP 0303454W WO 03082727 A1 WO03082727 A1 WO 03082727A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
tubular element
screw
kinematic chain
telescopic
Prior art date
Application number
PCT/EP2003/003454
Other languages
French (fr)
Original Assignee
Europoint S.N.C
Simonato, Walter
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 Europoint S.N.C, Simonato, Walter filed Critical Europoint S.N.C
Priority to AU2003245874A priority Critical patent/AU2003245874A1/en
Priority to EP03737954A priority patent/EP1492723A1/en
Publication of WO2003082727A1 publication Critical patent/WO2003082727A1/en

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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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
    • 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
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
    • B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated

Definitions

  • the present invention is about a telescopic multistage lifter. It is known that in order to prepare settings for shows or public events in general, appropriate telescopic multistage lifters are used, which function to keep elevated the equipments that make up the setting, lighting devices and also specialized personnel who are placed inside proper protection cages. According to the state of the art technique, the telescopic multistage lifters comprise two or more tubular elements placed coaxial one inside the other, where the more external tubular element is fixed and supported by appropriate bearing devices.
  • the other tubular elements are telescopically extracted in order to elevate the structure which is fixed to the last tubular element.
  • the extraction of the tubular elements takes place through mechanisms with ropes comprising pulleys and return pulleys contained inside of the tubular elements which are manually driven by an operator through a handle that protrudes from the fixed tubular element.
  • Hydraulic driven telescopic lifters are also used which, even if they provide great performances, nevertheless have several inconveniences such as a high cost and weight, the difficult transportability and the need to arrange the control units for the compression of the operation oil.
  • the present invention intends to solve the abovementioned problems.
  • the first invention's object is that of making a telescopic multistage lifter which has greater operational reliability than the telescopic multistage lifters available on the market. It is another object that the invention's telescopic lifter would have smaller diameters compared to the state of the art telescopic lifters which develop equivalent lifting heights.
  • a telescopic multistage lifter which in line with the main claim, comprises:
  • the telescopic lifter consists of four tubular elements arranged coaxial one inside the other.
  • Each kinematic chain also comprises one or more prismatic rods which support sprocket wheels meshed with toothed pinions keyed to the screws.
  • a single ratio-motor puts in rotation all the kinematic chains.
  • the presence of the kinematic chains comprising gears, prismatic rods and screws, makes the lifter operationally more reliable compared to the telescopic lifters with ropes.
  • the means which make up the kinematic chains because of their reduced radial dimensions and their distribution inside of the tubular elements, allow to reduce the diameters of the tubular elements and thus the radial dimensions of the lifter.
  • FIG. 1 is a longitudinal section of the telescopic lifter of the invention with the constitutive tubular elements arranged in an retracted position;
  • - Figure 2 is an enlarged view of the telescopic lifter of figure 1 in the extension phase;
  • - Figure 3 is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane Ill-Ill;
  • Figure 3a is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane IIIA-IIIA;
  • Figure 3b is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane IIIB-IIIB;
  • FIG. 4 is an isometric view of the kinematic chain of the telescopic lifter basically arranged in the position shown in figure 3;
  • FIG. 4a, 4b show respectively an enlarged detail of the isometric view of figure 4;
  • FIG. 5 is a schematic plan view of the kinematic chain of the lifter shown in figures 3 and 4b;
  • the telescopic lifter of the invention is illustrated in its totality in figure 1 where is generally indicated with 1 and where is shown that it essentially comprises a fixed tubular element 2, closed at the end by a flange 3, wherein they are coaxially arranged and one inside the other, a number of mobile tubular elements 4, 6, 8, defining a longitudinal direction X of extraction, each closed by a respective flange 5, 7, 9.
  • screw like means are connected to each of said flanges 5, 7, 9 of said mobile tubular elements 4, 6, 8, said means being generally indicated with 10 in figure 3, with 11 in figure 3a, and with 12 in figure 3b respectively, every one of them belongs to a corresponding kinematic chain C1 , C2, C3 coupled to a motorized unit 13, said screws and said kinematic chain being suitable for telescopically and simultaneously extracting each mobile tubular element 4, 6, 8 from the matching tubular element which contains it.
  • Said kinematic chains are diagrammatically illustrated in figure 5 where they are developed on a plane and generally indicated with C. They comprise:
  • the first screws 10, which belong to the first kinematic chain C1 comprise a first nut screw 10a connected to the first flange 5 and a first screw 10b, coupled to the first nut screw 10a, this latter being arranged as passing both through the second flange 7 and through the third flange 9;
  • the second screws 11 which belong to the second kinematic chain C2, comprise a second nut screw 11a connected to the second flange 7 and a second screw 11b, coupled to the second nut screw 11a, this latter being arranged as passing through the third flange 9;
  • the third screws 12, which belong to the third kinematic chain C3, comprise a third nut screw 12a connected to the third flange 9 and a third screw 12b, coupled to the third nut screw 12a. Furthermore, each screw has a non threaded end which is revolvingly coupled to a matching flange placed upward of the flange that houses the corresponding nut screw. Therefore, with reference to the diagram of figure 5, it is shown that:
  • the first screw 10b has a non threaded end 10c revolvingly coupled to the flange 3 of the fixed tubular element 2;
  • the second screw 11 b has a non threaded end 11c revolvingly coupled to the first flange 5;
  • the third screw 12b has a non threaded end 12c revolvingly coupled to the second flange 7.
  • the screws and overall the kinematic chains C, are put in motion by the motorized means, generally indicated with 13, which comprise:
  • ratio-motor 14 placed outside the flange 3 of the fixed tubular element 2 and coupled to the protruding end 10c of the first screw 10b;
  • the first kinematic chain C1 consists of a first screw 10b connected to the first gearwheel 15.
  • the second kinematic chain C2 instead comprises:
  • first sprocket wheel 19 integrally and slidingly coupled to the first prismatic rod 18 and comprised between the second gearwheel 16 and the first flange 5;
  • the third kinematic chain C3 comprises:
  • a second sprocket wheel 22 integrally and slidingly coupled to the second prismatic rod 21 and comprised between the first flange 5 and the second flange 7;
  • each sprocket wheel 19, 22, 25 is delimited by a pair of rings 19a, 22a, 25a respectively that have a diameter greater than the sprocket wheel's and they are mutually axially spaced of a lower amount than the length of the corresponding toothed pinion 20, 23, 26.
  • each sprocket wheel transmits the rotation to the corresponding toothed pinion and they maintain their meshing even when they are axially moved along the axis X from the movement of the respective flanges.
  • the end 10c of the first screw 10b is revolvingly coupled into a hole 3a belonging to the flange 3 and is comprised between the first gearwheel 15 and the ratio-motor 14;
  • the end 24a of the prismatic rod 24 is revolvingly fixed to the first flange 5 through a nut 35.
  • the prismatic rods have a hexagonal cross section and the gearings which mutually mesh by making a 1 :1 gear ratio. Hence rods and screws rotate with the same velocity and the mobile flanges 5, 7, 9 are axially all moved simultaneously along the axis X of the same amount.
  • the sprocket wheels 19, 22, 25 have each an axial through hole with a hexagonal contour for their coupling to the corresponding rod, so that they can be axially moved along the rod and at the same time put in rotation by the same rod.
  • FIG 6 An operative embodiment of the telescopic lifter 1 of the invention is shown in figure 6 where it is described that the fixed tubular element 2 is vertically arranged as bearing to the ground being supported by a tripod, generally indicated with 30.
  • a cage 31 is fixed to the last tubular element 8, which is used to keep, for example, an operator elevated.
  • FIG. 1 Another embodiment of the telescopic lifter 1 of the invention is shown in figure
  • figure 8 which supports a plurality of lights 33.
  • a variation of the embodiment of figure 7 is illustrated in figure 8 wherein two telescopic elements 1 are used in order to support the same trestle 32 which bears the same lights 33.
  • the telescopic lifter of the invention achieves all the preset objects.
  • Some embodiments of the multistage telescopic lifter of the invention made up for example by a number of stages smaller than four can be easily achieved by getting rid of one or more kinematic chains.
  • telescopic lifters consisting of more than four mobile tubular elements.
  • Modifications can also be brought to the telescopic lifter of the invention, for example consisting of a different geometry of the rods that instead of being a prismatic section can have a circular section with longitudinal grooves or they can be replaced by grooved rods.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A telescopic multistage lifter (1) is disclosed comprising a fixed tubular element (2) closed at one end by a flange (3) and a number of mobile tubular elements (4, 6, 8), each closed at one end by a respective flange (5, 7, 9) and arranged coaxial one inside the other and within the fixed tubular element (2). Screw like means (10, 11, 12) are connected to each one of the flanges (5, 7, 9) of the mobile tubular elements (4, 6, 8) belonging to a corresponding kinematic chain (C1, C2, C3) coupled to a motorized unit (13), which are suitable for telescopically and simultaneously extracting each mobile tubular element (4, 6, 8) from the matching tubular element which contains it.

Description

TELESCOPIC MULTISTAGE LIFTER The present invention is about a telescopic multistage lifter. It is known that in order to prepare settings for shows or public events in general, appropriate telescopic multistage lifters are used, which function to keep elevated the equipments that make up the setting, lighting devices and also specialized personnel who are placed inside proper protection cages. According to the state of the art technique, the telescopic multistage lifters comprise two or more tubular elements placed coaxial one inside the other, where the more external tubular element is fixed and supported by appropriate bearing devices.
The other tubular elements are telescopically extracted in order to elevate the structure which is fixed to the last tubular element.
The extraction of the tubular elements takes place through mechanisms with ropes comprising pulleys and return pulleys contained inside of the tubular elements which are manually driven by an operator through a handle that protrudes from the fixed tubular element.
In other cases the drive of the pulleys takes place through an electrical motor. An inconvenience that such telescopic lifters have consists in that during the operation, the ropes, sliding on both the pulleys and the return pulleys, wear out and break down fairly often.
This problem takes place mostly in the last tubular element that by having a lesser diameter than all the others, houses the smaller pulleys. In order to avoid such inconvenience, the telescopic lifters are built with tubular elements of rather big diameters with the effect that they usually reach considerable size and weight.
Hydraulic driven telescopic lifters are also used which, even if they provide great performances, nevertheless have several inconveniences such as a high cost and weight, the difficult transportability and the need to arrange the control units for the compression of the operation oil. The present invention intends to solve the abovementioned problems.
More specifically, the first invention's object is that of making a telescopic multistage lifter which has greater operational reliability than the telescopic multistage lifters available on the market. It is another object that the invention's telescopic lifter would have smaller diameters compared to the state of the art telescopic lifters which develop equivalent lifting heights.
Last but not least it is an object that the telescopic lifter of the invention, with the diameters of the constitutive tubular elements being equal, would allow to develop greater lifting heights compared to the state of the art telescopic lifters. Said objects are achieved by a telescopic multistage lifter which in line with the main claim, comprises:
- a fixed tubular element closed at one end by a flange;
- a plurality of mobile tubular elements each closed at one end by a respective flange and arranged coaxial one inside the other and within said fixed tubular element, and is characterized in that screw like means are connected to each one of said flanges of said mobile tubular elements, belonging to a corresponding kinematic chain coupled to a motorized unit, said screws and said kinematic chain being suitable for telescopically and simultaneously extracting each tubular element from the matching tubular element which contains it.
According to a preferred embodiment here described, the telescopic lifter consists of four tubular elements arranged coaxial one inside the other. Each kinematic chain also comprises one or more prismatic rods which support sprocket wheels meshed with toothed pinions keyed to the screws. A single ratio-motor puts in rotation all the kinematic chains.
Advantageously, the presence of the kinematic chains comprising gears, prismatic rods and screws, makes the lifter operationally more reliable compared to the telescopic lifters with ropes. More advantageously, the means which make up the kinematic chains, because of their reduced radial dimensions and their distribution inside of the tubular elements, allow to reduce the diameters of the tubular elements and thus the radial dimensions of the lifter.
Said objects and the advantages will be better highlighted during the description of a preferred embodiment of the invention with reference to the annexed drawings, wherein:
- Figure 1 is a longitudinal section of the telescopic lifter of the invention with the constitutive tubular elements arranged in an retracted position;
- Figure 2 is an enlarged view of the telescopic lifter of figure 1 in the extension phase; - Figure 3 is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane Ill-Ill;
- Figure 3a is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane IIIA-IIIA;
- Figure 3b is a longitudinal section of the telescopic lifter of figure 2, taken along the cutting plane IIIB-IIIB;
- Figure 4 is an isometric view of the kinematic chain of the telescopic lifter basically arranged in the position shown in figure 3;
- Figures 4a, 4b show respectively an enlarged detail of the isometric view of figure 4; - Figure 5 is a schematic plan view of the kinematic chain of the lifter shown in figures 3 and 4b;
- Figures 6, 7 and 8 show different applications of the telescopic lifter of the invention.
The telescopic lifter of the invention is illustrated in its totality in figure 1 where is generally indicated with 1 and where is shown that it essentially comprises a fixed tubular element 2, closed at the end by a flange 3, wherein they are coaxially arranged and one inside the other, a number of mobile tubular elements 4, 6, 8, defining a longitudinal direction X of extraction, each closed by a respective flange 5, 7, 9. According to the invention, screw like means are connected to each of said flanges 5, 7, 9 of said mobile tubular elements 4, 6, 8, said means being generally indicated with 10 in figure 3, with 11 in figure 3a, and with 12 in figure 3b respectively, every one of them belongs to a corresponding kinematic chain C1 , C2, C3 coupled to a motorized unit 13, said screws and said kinematic chain being suitable for telescopically and simultaneously extracting each mobile tubular element 4, 6, 8 from the matching tubular element which contains it.
Said kinematic chains are diagrammatically illustrated in figure 5 where they are developed on a plane and generally indicated with C. They comprise:
- a first kinematic chain, generally indicated with C1 ;
- a second kinematic chain, generally indicated C2;
- a third kinematic chain, generally indicated C3.
Regarding the mobile tubular elements, also with a specific reference to figures 1 to 3, it must be noticed that they comprise: - a first tubular element 4 closed at one end by a first flange 5 and arranged coaxial inside of the fixed tubular element 2 closed by the flange 3;
- a second tubular element 6 closed at one end by a second flange 7 and arranged coaxial inside of the first tubular element 4; - a third tubular element 8 closed at one end by a third flange 9 and arranged coaxial inside of the second tubular element 6. Regarding the previously mentioned screws instead, particularly referring to figures 3 and 3b, it must be noticed that:
- the first screws 10, which belong to the first kinematic chain C1 , comprise a first nut screw 10a connected to the first flange 5 and a first screw 10b, coupled to the first nut screw 10a, this latter being arranged as passing both through the second flange 7 and through the third flange 9;
- the second screws 11 , which belong to the second kinematic chain C2, comprise a second nut screw 11a connected to the second flange 7 and a second screw 11b, coupled to the second nut screw 11a, this latter being arranged as passing through the third flange 9;
- the third screws 12, which belong to the third kinematic chain C3, comprise a third nut screw 12a connected to the third flange 9 and a third screw 12b, coupled to the third nut screw 12a. Furthermore, each screw has a non threaded end which is revolvingly coupled to a matching flange placed upward of the flange that houses the corresponding nut screw. Therefore, with reference to the diagram of figure 5, it is shown that:
- the first screw 10b has a non threaded end 10c revolvingly coupled to the flange 3 of the fixed tubular element 2;
- the second screw 11 b has a non threaded end 11c revolvingly coupled to the first flange 5;
- the third screw 12b has a non threaded end 12c revolvingly coupled to the second flange 7. The screws and overall the kinematic chains C, are put in motion by the motorized means, generally indicated with 13, which comprise:
- a ratio-motor 14 placed outside the flange 3 of the fixed tubular element 2 and coupled to the protruding end 10c of the first screw 10b;
- a set of three gearwheels placed on the opposite side of the same flange 3 and thus inside of the fixed tubular element 2, consisting of: - a first gearwheel 15 keyed to the non threaded end 10c of the first screw 10b;
- a second gearwheel 16 which meshes with the first gearwheel 15 and is connected to the second kinematic chain C2; - a third gearwheel 17 which meshes with the second gearwheel 16 and is connected to the third kinematic chain C3.
For matters of clarity, in figure 5 the gearwheels 15, 16, 17 are planned as non mutually meshing according to a different configuration from the actual one illustrated for example in figures 4 to 4b. The kinematic chains C carry out at the same time the rotation of all the screws
10b, 11b and 12b in order to axially and simultaneously moving every flange 5,
7, 9 and thus telescopically extracting all the mobile tubular elements which each flange is connected to.
For this purpose, the first kinematic chain C1 consists of a first screw 10b connected to the first gearwheel 15.
The second kinematic chain C2 instead comprises:
- a first prismatic rod 18 arranged as passing through the flanges 5, 7, 9 and having the end 18a keyed to the second gearwheel 16;
- a first sprocket wheel 19 integrally and slidingly coupled to the first prismatic rod 18 and comprised between the second gearwheel 16 and the first flange 5;
- a first toothed pinion 20 which meshes with the first sprocket wheel 19 and is keyed to the end 11c of the second screw 11 b which has the end 11c revolvingly fixed to the first flange 5. At last, the third kinematic chain C3 comprises:
- a second prismatic rod 21 placed as passing through the flanges 5, 7, 9 and having the end 21a keyed to the third gearwheel 17;
- a second sprocket wheel 22 integrally and slidingly coupled to the second prismatic rod 21 and comprised between the first flange 5 and the second flange 7;
- a second toothed pinion 23 meshing with the second sprocket wheel 22 and keyed to a third prismatic rod 24 which is placed as passing through the second flange 7 and the third flange 9 and has the end 24a revolvingly fixed to the first flange 5; - a third sprocket wheel 25 integrally and slidingly coupled to the third prismatic rod 24 and comprised between the second toothed pinion 23 and the second flange 7;
- a third toothed pinion 26 that meshes with the third sprocket wheel 25 and is keyed to the end 12c of the third screw 12b which is revolvingly fixed to the second flange 7.
Regarding the previously described kinematic chains C, it must be noticed specifically in the outline of figure 5 and also in all the previous figures 2 to 4b, which each sprocket wheel 19, 22, 25 is delimited by a pair of rings 19a, 22a, 25a respectively that have a diameter greater than the sprocket wheel's and they are mutually axially spaced of a lower amount than the length of the corresponding toothed pinion 20, 23, 26.
In such manner, each sprocket wheel transmits the rotation to the corresponding toothed pinion and they maintain their meshing even when they are axially moved along the axis X from the movement of the respective flanges.
Regarding the couplings of the flanges to the screws and to the prismatic rods, it must be noticed that:
- the end 10c of the first screw 10b is revolvingly coupled into a hole 3a belonging to the flange 3 and is comprised between the first gearwheel 15 and the ratio-motor 14;
- the ends 1 1 c, 12c of the second screw 1 1 b and of the third screw 12b respectively are revolvingly coupled into a through hole 5a of the first flange 5 and a through hole 7a of the second flange 7 respectively to which they are fixed being comprised between the first toothed pinion 20 and a first bearing 1 1d and the third toothed pinion 26 and a second bearing 12d respectively;
- the end 24a of the prismatic rod 24 is revolvingly fixed to the first flange 5 through a nut 35.
According to the specific constitutive embodiment here described, the prismatic rods have a hexagonal cross section and the gearings which mutually mesh by making a 1 :1 gear ratio. Hence rods and screws rotate with the same velocity and the mobile flanges 5, 7, 9 are axially all moved simultaneously along the axis X of the same amount.
Obviously, the sprocket wheels 19, 22, 25 have each an axial through hole with a hexagonal contour for their coupling to the corresponding rod, so that they can be axially moved along the rod and at the same time put in rotation by the same rod.
Operatively when the motorized unit 13 is put in rotation, the simultaneous rotation of all the kinematic chains C1 , C2, C3, the simultaneous movement along the axis X of all the mobile flanges 5, 7, 9 and thus the telescopic extraction of every mobile tubular element 4, 6, 8 connected to them are accomplished.
It is clear that the extent of the telescopic extraction of the mobile tubular elements can be varied accordingly by stopping the motorized unit as a function of the desired maximum height.
An operative embodiment of the telescopic lifter 1 of the invention is shown in figure 6 where it is described that the fixed tubular element 2 is vertically arranged as bearing to the ground being supported by a tripod, generally indicated with 30. In this case, a cage 31 is fixed to the last tubular element 8, which is used to keep, for example, an operator elevated.
Another embodiment of the telescopic lifter 1 of the invention is shown in figure
7 where it is illustrated that a trestle 32 is connected to the last tubular element
8, which supports a plurality of lights 33. At last, a variation of the embodiment of figure 7 is illustrated in figure 8 wherein two telescopic elements 1 are used in order to support the same trestle 32 which bears the same lights 33.
Based on what has been previously said it is understood that the telescopic lifter of the invention achieves all the preset objects. Some embodiments of the multistage telescopic lifter of the invention made up for example by a number of stages smaller than four can be easily achieved by getting rid of one or more kinematic chains.
For example, in order to obtain a telescopic lifter made of only two tubular elements, such as a fixed tubular element 2 and a first mobile tubular element 4, it will be enough to eliminate the second and third kinematic chain C2, C3 respectively.
Similarly, in order to make a telescopic lifter comprising only three tubular elements, it will be enough to get rid of the third kinematic chain C3.
In a similar manner, by adding additional kinematic chains, is possible to make telescopic lifters consisting of more than four mobile tubular elements. Modifications can also be brought to the telescopic lifter of the invention, for example consisting of a different geometry of the rods that instead of being a prismatic section can have a circular section with longitudinal grooves or they can be replaced by grooved rods.
Such and further possible variations which might fall within the scope of the following claims, should be all considered protected by the present patent.

Claims

1) A telescopic multistage lifter (1) comprising:
- a fixed tubular element (2) closed at one end by a flange (3);
- a number of mobile tubular elements (4, 6, 8) each closed at one end by a respective flange (5, 7, 9) and arranged coaxial one inside the other and within said fixed tubular element (2), characterized in that screw like means (10, 11 , 12) are connected to each one of said flanges (5, 7, 9) of said mobile tubular elements (4, 6, 8), belonging to a corresponding kinematic chain (C1 , C2, C3) coupled to a motorized unit (13), said screws and said kinematic chain being suitable for telescopically and simultaneously extracting each mobile tubular element (4, 6, 8) from the matching tubular element which contains it.
2) The telescopic lifter (1) according to claim 1 ), characterized in that said mobile tubular elements comprise: - a first tubular element (4) closed at one end by a first flange (5) and arranged coaxial inside of the fixed tubular element (2) closed by the flange
(3);
- a second tubular element (6) closed at one end by a second flange (7) and arranged coaxial inside of the first tubular element (4); - a third tubular element (8) closed at one end by a third flange (9) and arranged coaxial inside of the second tubular element (6).
3) The telescopic lifter (1) according to claim 2), characterized by comprising:
- the first screws (10) consisting of a first nut screw (10a) connected to said first flange (5) which houses a first screw (10b) belonging to a first kinematic chain (C1);
- the second screws (11 ) consisting of a second nut screw (11a) connected to said second flange (7) which houses a second screw (11 b) belonging to the second kinematic chain (C2); - the third screws (12) consisting of a third nut screw (12a) connected to said third flange (9) which houses a third screw (12b) belonging to the third kinematic chain (C3), said kinematic chains being put in motion by a single motorized unit (13).
4) The telescopic lifter (1) according to claim 3), characterized in that said single motorized unit (13) comprises: - a first gearwheel (15) keyed to said first screw (10b) which meshes with said nut screw (10a);
- a second gearwheel (16) which meshes with said first gearwheel (15) and is connected to said second kinematic chain (C2); - a third gearwheel (17) which meshes with the second gearwheel (16) and is connected to the third kinematic chain (C3);
- a ratio-motor (14) coaxially coupled at the end of said first screw (10c) which protrudes through said flange (3) of said fixed tubular element (2), said gearwheels (15, 16, 17) being placed inside of said fixed tubular element (2) where they are supported by said corresponding flange (3).
5) The telescopic lifter (1 ) according to claim 4), characterized in that said first kinematic chain (C1) comprises said first screw (10) connected to said first gearwheel (15).
6) The telescopic lifter (1) according to claim 4), characterized in that said second kinematic chain (C2) comprises:
- a first prismatic rod (18) arranged as passing through said first (5), said second (7), said third (9) flange and having an end (18a) keyed to said second gearwheel (16);
- a first sprocket wheel (19) slidingly integral with said first prismatic rod (18); - a first toothed pinion (20) meshing with said first sprocket wheel (19), integral with said first flange (5) and keyed to an end (11c) of said second screw (11b).
7) The telescopic lifter (1 ) according to claim 4), characterized in that said third kinematic chain (C3) comprises: - a second prismatic rod (21) placed as passing through said first (5), said second (7), said third (9) flange and having a keyed end (21a) to said third gearwheel (17);
- a second sprocket wheel (22) slidingly integral with said second prismatic rod (21); - a second toothed pinion (23) meshing with said second sprocket wheel (22) and keyed slidingly to a third prismatic rod (24) placed as passing through said second (7) and said third (9) flange and has an end (24a) integral with said first flange (5);
- a third sprocket wheel (25) slidingly integral with said third prismatic rod (24); - a third toothed pinion (26) meshing with said third sprocket wheel (25), integral with said second flange (7) and keyed to an end (12c) of said third screw (12b).
8) The telescopic lifter (1) according to claim 6) or 7), characterized in that each of said sprocket wheels (19, 22, 25) is comprised between a pair rings (19a, 22a, 25a) having a greater diameter than the corresponding sprocket wheel.
9) The telescopic lifter (1 ) according to claim 6) or 7), characterized in that each of said prismatic rods (18, 21 , 24) has a hexagonal cross section.
10) The telescopic lifter (1 ) according to claim 6) or 7) or even 8), characterized in that each of said sprocket wheels (19, 22, 25) has an axial through hole with a hexagonal contour.
PCT/EP2003/003454 2002-04-03 2003-04-02 Telescopic multistage lifter WO2003082727A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003245874A AU2003245874A1 (en) 2002-04-03 2003-04-02 Telescopic multistage lifter
EP03737954A EP1492723A1 (en) 2002-04-03 2003-04-02 Telescopic multistage lifter

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ITVI2002A000061 2002-04-03
ITVI20020061 ITVI20020061A1 (en) 2002-04-03 2002-04-03 MULTI-STAGE TELESCOPIC LIFT

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WO2003082727A1 true WO2003082727A1 (en) 2003-10-09

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AU (1) AU2003245874A1 (en)
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WO (1) WO2003082727A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866020A1 (en) * 2004-02-10 2005-08-12 Rocco Compagnone Elevator device for e.g. raising load e.g. work platform, has splined shaft kinetically integrated with primary and secondary worms by respective gear sets to assure transmission of rotative movement from primary worm to secondary worm
EP1591038A1 (en) * 2004-04-26 2005-11-02 X2 Technology i Växjö AB Telescopic device
WO2014041258A1 (en) * 2012-09-17 2014-03-20 Rocco Compagnone Mechanised and automated device for the protection or rapid replacement of fragile underfoot surfaces, in particular the fields of stadiums and other ball game courts

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SU658078A1 (en) * 1977-04-06 1979-04-25 Волгодонский Филиал Всесоюзного Проектно-Конструкторского,Технологического Института Атомного Машиностроения И Котлостроения Telescopic hoist
SU1553515A1 (en) * 1988-06-10 1990-03-30 Предприятие П/Я В-2634 Telescopic hoist
SU1682298A1 (en) * 1989-07-06 1991-10-07 Всесоюзный Государственный Конструкторско-Технологический Институт "Вктистроймеханизация" Отдела По Капитальному Строительству И Реконструкции Госагропрома Ссср Telescopic lifter
WO1995015913A1 (en) * 1993-12-06 1995-06-15 Miyoshi Co., Ltd. Telescopic device, interconnection and separation device for use in same, and device for preventing of extending-together
US20020104395A1 (en) * 2001-02-02 2002-08-08 Zimmerman Dean A. Multi-leg telescopic linear actuator

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Publication number Priority date Publication date Assignee Title
SU658078A1 (en) * 1977-04-06 1979-04-25 Волгодонский Филиал Всесоюзного Проектно-Конструкторского,Технологического Института Атомного Машиностроения И Котлостроения Telescopic hoist
SU1553515A1 (en) * 1988-06-10 1990-03-30 Предприятие П/Я В-2634 Telescopic hoist
SU1682298A1 (en) * 1989-07-06 1991-10-07 Всесоюзный Государственный Конструкторско-Технологический Институт "Вктистроймеханизация" Отдела По Капитальному Строительству И Реконструкции Госагропрома Ссср Telescopic lifter
WO1995015913A1 (en) * 1993-12-06 1995-06-15 Miyoshi Co., Ltd. Telescopic device, interconnection and separation device for use in same, and device for preventing of extending-together
US20020104395A1 (en) * 2001-02-02 2002-08-08 Zimmerman Dean A. Multi-leg telescopic linear actuator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866020A1 (en) * 2004-02-10 2005-08-12 Rocco Compagnone Elevator device for e.g. raising load e.g. work platform, has splined shaft kinetically integrated with primary and secondary worms by respective gear sets to assure transmission of rotative movement from primary worm to secondary worm
WO2005082771A1 (en) * 2004-02-10 2005-09-09 Rocco Compagnone Telescopic structure system implemented by a series of screw jacks
EP1591038A1 (en) * 2004-04-26 2005-11-02 X2 Technology i Växjö AB Telescopic device
WO2014041258A1 (en) * 2012-09-17 2014-03-20 Rocco Compagnone Mechanised and automated device for the protection or rapid replacement of fragile underfoot surfaces, in particular the fields of stadiums and other ball game courts
FR2995649A1 (en) * 2012-09-17 2014-03-21 Rocco Compagnone LARGE AMPLITUDE LINEAR DISPLACEMENT DEVICE PRODUCED BY A CREW OF MECHANICAL MODULES COMBINABLE TO WILL AND MUS BY A SAME ROTARY ENERGY SOURCE.

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EP1492723A1 (en) 2005-01-05
ITVI20020061A1 (en) 2003-10-03
AU2003245874A1 (en) 2003-10-13

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