US3602335A - Platform positioning mechanism - Google Patents

Platform positioning mechanism Download PDF

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US3602335A
US3602335A US3602335DA US3602335A US 3602335 A US3602335 A US 3602335A US 3602335D A US3602335D A US 3602335DA US 3602335 A US3602335 A US 3602335A
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Prior art keywords
carriage
mast
platform
relatively
means
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Stanley J Gustetic
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Eaton Corp
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Eaton Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04Lifting 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28Mobile scaffolds; Scaffolds with mobile platforms

Abstract

Through a system of beams and rollers, an upper base is mounted for horizontal movement at or near the ceiling of a room. A vertical mast is fixed at its upper end to the upper base for integral movement therewith. A movable mast is telescoped about the fixed mast and moves vertically thereon. A carriage slides vertically on the movable mast and has an opening for the passage of both masts so that it may be elevated to the upper end of the movable mast when the movable mast is lifted to its uppermost position on the fixed mast. An operator''s platform rotates about the carriage on a circular bearing having an opening through which the two masts extend.

Description

United States Patent 1 [72] Inventor Standly J. Gustetic Euclid, Ohio [21] AppLNo. 861,066 [221 Filed Sept. 25, 1969 [45] Patented Aug. 31, 1971 [73] Assignee Eaton Yale 8: Towne, Inc.

Cleveland, Ohio [54] PLATFORM POSITIONING MECHANISM 13 Claims, 10 Drawing Figs.

[52] US. Cl 182/37, 182/142, 182/150 [51] 1nt.Cl E04g3/10 [50] Field otSear-ch 182/37, 142,150,l28,63,148;212/l28,125

[56] References Cited I UNITED STATES PATENTS 2,553,378 5/1951 Miller 182/37 Primary Examiner- Reinaldo P. Machado Attorney-Teagno and Toddy ABSTRACT: Through a system of beams and rollers, an upper base is mounted for horizontal movement at or near the ceiling of a room. A vertical mast is fixed at its upper end to the upper base for integral movement therewith. A movable mast is telescoped about the fixed mast and moves vertically thereon. A carriage slides vertically on the movable mast and has an opening for the passage of 150th masts so that it may be elevated to the upper end of the movable mast when the movable mast is lifted to its uppermost position on the fixed mast. An operators platform rotates about the carriage on a circular bearing having an opening through which the two masts extend.

AEROPLANE PATENTEH was] I97! SHEET 1 [1F 6 FIG.

AEROPLANE alllllllllllllllllllllll I HflH -I I NNNH INVENTOR.

STANLEY J'- GUSTETIC BY:

ATTORNEY.

PATENTEI] M1831 I971 3,602,335

SHEET 2 0r 6 3| INVENTOR.

BY STANLEY I GU87? TIC F e 7 ATTORNEY.

ATENIEH nus31 3 602 335 SHEEI 5 OF 6 [Ill/Ill IN VENT OR.

e, BYSTANLEY .zeusrmc N AT TO RN EY- ATENTEH M1831 11 3 502 335 saw 6 0F 6 65 INVENTOR.

sTQ NLEY .Z'GUSTETIC ATTORNEY.

PLATFORM POSITIONING MECHANISM BACKGROUND OF INVENTION This invention relates to a combination of the class in which a carriage is mounted for vertical movement on a mast, the mast itself being mounted for lateral movement in a room or the like so as to bring the carriage into any position in the room. More particularly, the invention relates to a machine of the particular class in which the carriage is adapted to carry an operator into positions to perform particular operations. Through proper manipulation of the mast and carriage, the operator may be moved to any position laterally and vertically within the room for the carrying out of any desired type of operation.

PRIOR ART There is much prior art available in this field-Thus, it is quite old in the art to have an upper base mounted for horizontal movement adjacent a ceiling, through the utilization of a system of beams and rollers. On the base, there is usually mounted a downwardly extending mast that is rotatable relatively to the base. The carriage is usually mounted for vertical movement on the mast, and as the mast rotates the carriage rotates therewith.

As those skilled in the art will readily appreciate, the use of a very long mast as may be required in a room having a very high ceiling, and the positioning of a relatively heavy carriage on the mast, will exert great stresses on the bearings that mount the mast for rotation relatively to the base. It is further well to note that the mast, if it is to allow the carriage to move to a low position, will have to be of that length approaching the floor. Therefore, the lower end of the mast is always in a position where it prevents the movement of the entire assembly past machinery or other structures that are on the floor of the room. Any lateral stress exerted at the end of the mast will, through the considerable length of the mast, cause great damage at the uppermost bearing.

OUTLINE OF INVENTION My invention is particularly adapted for use in a room having an extremely high ceiling, such as a room in which an airplane is to be serviced orassembled. As a feature of the invention, I utilize a mast that is fixed at its upper end to the upper base of my assembly, thereby contributing an extremely rigid construction such as cannot be obtained where the mast is mounted on a bearing for rotation relatively to the base as earlier outlined. As a further feature of the invention, in order to facilitate movement of my entire assembly and carriage without undue hindrance by machinery resting on the floor of the room, the mast is preferably made of two telescoping parts. Thus, there is an outer part adapted for movement on an inner part, which is that part of the mast fixed at its upper end to the base. As a further particular feature of the invention, the outer or movable part is in the form of a tube that is telescoped about the inner or fixed mast, and is preferably raised and lowered relatively to the fixed mast as by conventional hoist drum and cable.

As a further particular feature of the invention, l utilize a carriage that is adapted to be raised and lowered relatively to the tubular movable mast, with the movable mast extending through an opening of both the carriage and a platform that is a part of the carriage assembly. The platform is rotatable relatively to the carriage as well as the mast, and carries the operator and the various controls of my assembly. As a particular feature of this portion of the invention, the platform is counterbalanced by novel means.

Both the movable tubular mast and the fixed or rigid mast may extend through the central opening in the carriage and the operators platform in order to permit the movement of the carriage between an extreme low position and an extreme upper position. This feature is of extreme importance.

As a still further particular feature of the invention, the carriage is adapted to be lifted relatively to the movable mast through the utilization of racks mounted on the movable mast and contacted by pinions rotated by hydraulic motors carried on the carriage. It will be well to emphasize that the utilization of hydraulic motors and pinions, makes possible the elimination of relatively heavy electric motors on the carriage, which it will be emphasized, does not rotate relatively to the movable mast. On the carriage platform that does rotate relatively to the mast, I prefer to mount the motors and pumps for generating the hydraulic pressure that is required to operate the pinions that move the carriage vertically on themovable mast. The motors and pumps contribute balance as will be set forth. Obviously, the movable mast is movable on the rigid mast independently of the movement of the carriage on the movable mast.

As part of the concept of my invention, 1 mount the motors and pumps on that side of the rotating operator's platform opposite the side on which the operator stands, thereby effecting counterbalancing of the carriage and platform assembly.

As a still further feature of the invention, I utilize a very novel and simple means for transmitting hydraulic pressure from the rotating carriage platform to the nonrotating carriage, utilizing a single hose connected in an extremely novel manner between the carriage and its platform.

DESCRIPTION OF DRAWINGS FIG. 1 is a vertical view of the assembly of my invention showing its relation to the fuselage of an airplane to be serviced. FIG. 2 is an end view of the assembly of FIG. 1. FIG. 3 shows the assembly of FIG. 1 with the platform rotated and the carriage lifted to a relatively high position to service the upper portion of an airplane. FIG. 4 is an enlarged elevation of the nonrotating carriage on which the platform is mounted for rotation. FIG. 5 is a view looking downwardly on the assembly of FIG. 4 showing the manner in which the nonrotating carriage is mounted for vertical movement on the tubular movable mast. FIG. 6 is an enlarged view in elevation showing the assembly of the rotating platform to the nonrotating carriage as wellas parts of means for mounting the carriage on the tubular mast. FIG. 7 is a section along the line-7- 7 of FIG. 6. FIGS. 8, 9 and 10 are diagrammatic views showing the hydraulic line connecting the nonrotating carriage and the source of hydraulic fluid pressure on the rotating platform.

DESCRIPTION OF A PREFERRED MODIFICATION OF INVENTION Referring now more particularly to the drawings, and especially FIG. 1 and 2, the ceiling of the room in which the assembly of my invention is operated is designated by the reference letter C, while the floor is designated by reference letter F. The upper base of the machine is designated by the reference letter B and is manufactured from various structural steel members as is common in. the art, and when completely assembled, is adapted to be mounted on rails 10 through use of rollers 11. The rails 10 are in turn secured to roller carriages 12 that through rollers 13 are mounted on a beam 14 secured in a suitable manner to the ceiling C. The mounting is such that the base B may move in a longitudinal direction relatively to the ceiling, and also in a transverse direction relatively to the ceiling, so that the base B may be positioned anywhere in the room relatively to the ceiling C. The manner in which the base B is mounted for movement is so very well known in the art, that I have not shown the construction in detail nor will I describe it in detail, it obviously being not a particular feature of my invention.

The fixed or rigid mast of my invention is designated by reference numeral 15, and it is secured at its upper end at 16 to the base B so as to be integral with the base and to move integrally with the base. The mast 15 may be fabricated in any manner desired, but in the main, it will be such as to present, for the purpose of my invention a rectangular cross section preferably square. The movable mast of my invention is designated by reference numeral 20 and it is fabricated from structural members to present the cross-sectional shape best illustrated in FIG. 5. Naturally the cross section will be such that the mast 20 will fit about mast and will move freely vertically relatively thereto. The manner in whichthe movable mast is fabricated is not particularly important, but it is quite necessary, however, that it be light and strong. In order to contribute to its strength, angular struts such as illustrated at 21 in FIG. 2 may be utilized. Also, flanges 22 may extend at each comer from the mast as particularly shown in FIG. 5.

For lifting and lowering the tubular mast 20 relatively to the rigid or fixed rnast 15, I utilize a hoist assembly designated by reference letter H, and embodying a hoisting drum 25 and a hoisting cable 26 fastened at one end to the movable tubular mast 20 at 27. The drum 25 itself is rotated by the usual electric motor 28. It is quite obvious, that operation of the motor 28 will cause the cable 26 to lift and lower the outer tubular mast 20 relatively to the fixed mast 15. I have not illustrated the means for guiding mast 20 relatively to mast 15 because any suitable system of rollers may be used.

The carriage assembly of my invention, as already outlined, includes a nonrotating carriage designated by reference numeral 30, and a rotating operators platform designated generally by reference numeral 31, and mounted on carriage 30 for rotation as from the position of FIG. I to the position of FIG. 3. The nonrotating carriage 30 may be fabricated in any suitable manner, but its important necessary feature is a square central opening for the movable tubular mast 20, as probably best seen in FIG. 5. There, it will be noted that this central opening is formed by an assembly of horizontal beams, suitably welded or bolted to one another. Thus, there is a beam 32 on which are mounted rollers 33 that cooperate with one surface of the rectangular movable tubular mast 20. The carriage has a further beam 34 at right angles to beam 32 on which are mounted rollers 35 that cooperate with another surface of the tubular movable upright 20. A further beam designated by reference numeral 36 is shown with rollers 37 that coact with a third surface of the tubular mast 20. In FIGS. 4 and 6 further upper rollers 38 are shown on the carriage 30 for cooperating with a fourth side of the movable mast 20. These rollers do not appear in FIG. 5 because a portion of the structure in FIG. 5 is not shown in order to better illustrate other mechanism.

Further, as shown in FIG. 6, there are additional rollers mounted on the carriage 30 below the rollers described above, and these additional rollers include two pairs of rollers 40 that are also well illustrated in FIG. 7, these rollers cooperating with the rollersalready described for securely mounting the nonrotating carriage 30 about the tubular upright 20. Still more rollers 41 are also shown in FIG. 6, these lying directly below the rollers 35. It will now be well appreciated that the relationship of the rollers to the mast is such that the nonrotating carriage 30 will be well-mounted for vertical movement on the tubular mast 20, and that the tubular mast will move through a central opening in the carriage 20.

For lifting carriage 30 relatively to the mast 20, I apply to each of two opposed surfaces of the tubular mast, a rack 50. The racks 50 may be welded to the surfaces of the mast so as to become integral portions thereof as clearly shown in FIG. 5, as well as in FIG. 3 and 6.

Mounted on the carriage 30, as best seen in FIG. 4 and 5, is a lower hydraulic motor 51, and an upper hydraulic motor 52. Motor 51 operates a gear reduction unit 53, while upper hydraulic motor 52 operates a gear reduction unit 54. Gear reduction unit 53 rotates a pinion 55 that is in engagement with one of the racks 50, while gear reduction 54 operates a pinion 56 that is in engagement with the other of the racks 50. It will be obvious that rotation of the pinions by the gear reduction units and the hydraulic motors 51, 52 will bring about the lifting of the carriage 30 relatively to the tubular mast 20. As a particular feature of the invention, the gear reduction units 53, 54 are irreversible, so that should there be a failure of the hydraulic system, as a breakage of a hose transmitting fluid to the motors 51,52 the carriage 30 will not drop since the gears will hold the pinions 55 and 56 against rotation. The system of rollers I described earlier, securely hold the pinions 55,56 against the racks.

I shall now describe the mounting of the operator's platform 31 on the carriage 30 to complete my carriage assembly. At the lower end of the nonrotating carriage 30 there is mounted a circular gear 60, as is well illustrated in FIG. 4. This gear is in the form of a ring, and as can also be seen in FIG. 6, it is secured to the nonrotating carriage 30 through welding to a collar 61 that is integral with the carriage 30.

The rotating operators platform 31 of the carriage assembly has a circular ring portion 62 that is inserted into the central opening of the circular gear 60, as best seen in FIG. 6. The part 62 is formed with a circular bearing groove on its periphery that coacts with the series of ball bearings 63 lying in a bearing groove formed on the inner surface of the gear 60. Through the particular arrangement, it is readily seen that ring 62 will rotate. relatively to the gear 60, and will also be supported by the gear 60. I shall shortly describe how gear 60 is utilized to rotate the operators platform 31.

A series of bolts 64, one of which is shown in FIG. 6, secure to the ring 62 for movement therewith, the baseplate 65 of the operator's platform 31 which extends laterally at both sides of the tubular upright 20. As illustrated in FIG. 6, the right-hand portion of plate 65 carries the operators stand S on which may stand an operator. Suitable railings 66 are formed on the stand to protect the operator, and at 67 and 68, the various controls for the several motors required to manipulate the platform 31, the carriage 30, and the masts l5 and 20, as well as the upper base B, will be mounted.

In counterbalancing relation to the parts of the platform 31, I utilize an assembly 70, in which may be included motors and pumps for developing the hydraulic pressure that is required for the operation of the two hydraulic motors 51, 52 described in connection with FIG. 4, these being motors that actuate the pinions 55, 56 for lifting and lowering the carriage relatively to the tubular upright 20. I shall presently describe the manner in which fluid is directed from assembly 70 towards the motors 51, 52.

The fluid pressure developed at 70 is also directed to a hydraulic motor 71 best illustrated in FIG. 6. This motor, which is carried on platform 31, drives a pinion 72 that is in engagement with the gear 60. Obviously, by rotation of the pinion 72, the rotatable platform 31 of the carriage assembly including base 65 and ring 62 will rotate on the ball bearings 63 relatively to the ring gear 60.

Because the source of fluid pressure at 70 rotates relatively to the hydraulic motors 51, 52 which are on carriage 30, it is necessary to develop means for transporting the fluid under pressure from the source 70 to the motors 51, 52. As earlier outlined, because the electric motors and the pumps for developing fluid pressure at 70 are located opposite the operators stand S, they act to counterbalance the weight at S in a most effective manner. Were the apparatus at 70 positioned on the nonrotating carriage 30, the lack of counterbalancing would require the use of more massive and heavier parts, as is obvious. It is also important to consider, that the locating of the hydraulic motor 71 as shown in FIG. 6, places it very close to the supply of fluid pressure 70, so that fluid pressure need only be directed through relatively more complex means to the two motors 51, 52.

This last is accomplished best as is illustrated in FIG. 8, 9 and 10 taken in conjunction with FIG. 6. l have, for simplification, not shown the feature in other figures. Thus, in FIG. 6 there is shown a hose 75 extending from apparatus 70 to a connection at 76 on nonrotating carriage 30 from which connection fluid is directed to the two hydraulic motors 51 and 52 by rigid conventional means not shown. The utilization of the hose 75 in my combination is extremely novel as will appear from astudy of diagrammatic FIGS. 8, 9 and 10. In FIG. 8 the rotating platform 31 is in its position relatively to the nonrotating carriage 30, that is illustrated also in FIG. 6. The connection of one end of the hose 75 to the source of fluid pressure at 70 is designated by reference numeral 77. As already indicated, the hose 75 is secured at its other end to a connection 76 fixed relatively to the nonrotating carriage 30. Let us assume now that the rotating platform portion 31 is rotated relatively to the ring gear 60 by motor 71 and pinion 72 (FIG. 6) from the position of FIG. 8 to the position of FIG. 9. In FIG. 9 it will be noted that the hose 75 has the shape substantially that of a U, and has not in anyway interfered with rotation of the platform 31. The extreme rotation of the platform 31 from FIG. 8 is illustrated in FIG. 10, where there has been about 90 further rotation from the position of FIG. 9. In this final position, it will be noted again that hose 75 has in no way interfered with the movement of the rotating platform 31 of the carriage assembly. It is rather obvious that by the very simple means that I have shown and described, it is possible to actuate the motors 51, 52 for operating the pinions 55, 56 to raise and lower the carriage 30, while utilizing a source of fluid pressure that rotates relatively to the motors and may contribute a counterbalancing function. v

It will be well now to summarize the manner in which the parts of my invention operate to contribute the various features earlier outlined. As can be seen in FIG. 1, the carriage and platform 31 can be lowered to an extremely low position where a workman on stand S is actually under part of the fuselage of the airplane shown in that figure. The carriage may also be located as shown in FIG. 3, where the operator on stand S is able to contact the upper portion of the fuselage of the airplane. It will be appreciated that to reach the position of FIG. 3 from the position of FIG. 1, the carriage 30 has been moved upward by operation of the pinions 55, 56 in coaction with the racks 50. At the same time, by manipulation of the controls at 68, the operator has brought about the operation of the hoist H for raising the tubular mast 20 relatively to the fixed rigid mast 15. It will be appreciated that during movement of the movable mast 20 relatively to the mast by hoist H, the carriage is elevated independently through operation of the pinions 55,56 as just described. This independent action of the hoist and pinions will contribute extremely swift lifting movement to the carriage, since the electric motor 28' of the hoist II will be operating the same time that the two hydraulic motors 51, 52 are operating to bring about the lifting movement of the carriage on mast 20. Further, operation of suitable controls at the console 68 will also bring about the rotation of the platform 31 relatively to carriage 30 through pinion 72 and gear 60 as the said carriage is being elevated. An operator on stand S may now work on the upper part of the airplane as seen in FIG. 3.

It will be noted that in FIG. 3 the movable mast and fixed mast 15 are both in the central opening of carriage 30 and platform 31. This has made possible the upward movement of the carriage and platform. It will also be noted that the lower end of mast 20 is far above the floor F so as to make possible its free movement with the upper base B and fixed mast 15.

Thus, the novel use of telescoping rigid and movable masts,

together with the novel carriage 30 and its opening for the masts, contributes extremely valuable features.

I do believe that the very considerable merits of my invention will now be apparent to those skilled in the art.

I now claim:

1. In a combination of the class described, an upper base mounted for horizontal movement relatively to an upper structure, a vertically positioned mast fixed at its upper end to said base so as to become an integral rigid part thereof, a movable mast mounted for vertical movement on said rigid mast, means for imparting vertical movement to said movable mast relatively to said rigid mast, a carriage mounted for vertical movement on said movable mast, means whereby said carriage is moved vertically relatively to said movable mast and together with said movable mast relatively to said rigid mast, said carriage having a vertical opening for the passage of both said masts whereby said carriage may be lifted vertically relatively to both said masts while completely encompassing both said masts, said carriage having a horizontal circular bearing formed outwardly about said vertical opening, and a platform rotatably mounted on said circular bearing and also formed with an opening for said masts. I

2. In the combination of claim I the feature that said means whereby'said carriage is moved vertically comprises a rack secured to a vertical surface of said movable mast and a motor driven pinion on said carriage.

3. In the combination of claim 2, the feature that the motor driving said pinion is a hydraulic motor, a source of hydraulic pressure for said motor on said platform, and means for connecting said source of hydraulic pressure to said motor.

4. In the combination of claim 4, the feature that said means for connecting said source of hydraulic pressure to said motor is a hose connected at one end thereof to said hydraulic pressure source and at the other end to a conduit fixed on said carriage, said fixed conduit and hydraulic pressure source being so positioned relatively to said hose that said hose forms a substantial U between said fixed conduit and said hydraulic pressure source when said platform is rotated to a point substantially midway of two extreme points relatively to said carriage.

5. In the combination of claim I, the feature that the means for imparting vertical movement to said movable mast are power operated, independent power means comprising the means for lifting and lowering said carriage, power means for rotating said platform relatively to said carriage on said bearing, and control means for all said power means on said platform.

6. In the combination of claim 1, the feature that said platform has an operators stand at one side of the axis of rotation of said platform, and a source of hydraulic pressure on a diametrically opposed side of said platform, said means whereby said carriage is moved vertically comprising a hydraulic motor on said carriage, and means connecting said hydraulic motor to said source of hydraulic pressure.

7. In the combination of claim 1, the feature that said carriage has a hydraulic motor and said platform has a source of fluid pressure thereon, and a hose connected at one end thereof to said hydraulic pressure source and at the other end to a conduit fixed, on said carriage, said fixed conduit and hydraulic pressure source being so positioned relatively to said hose that said hose forms a substantialU between said fixed conduit and said hydraulic pressure when said platform is rotated to a point substantially midway of two extreme points relatively to said carriage.

8. In a combination of the class described, a mast, a carriage, a horizontal circular bearing on said carriage, a platform mounted on said bearing for rotation relatively to said carriage, said carriage and platform having each an opening within the area outlined by the circumference of said circular bearing, means mounting said carriage for vertical movement on said mast with said mast extending through both said openings so that said carriage and platform may be elevated relatively to said mast, and means for moving said carriage vertically relatively to said mast.

9. In the combination of claim 8, an upper base, a mast mounted at its upper end on said base and extending downwardly from said upper base, and means mounting said first mast for vertical movement relatively to said second mast with said second mast also extending through the said openings so that said carriage and platform may be elevated relatively to both masts.

10. In the combination of claim 8, the feature that said platform has an operators stand at one side of the axis of rotation of said platform and a source of hydraulic pressure on a diametrically opposed side of said platform, said means whereby said carriage is moved vertically comprising a hydraulic motor on said carriage, and means connecting said hydraulic motor to said source of hydraulic pressure.

11. In the combination of claim 8, the feature that said carriage has a hydraulic motor and said platform has a source of fluid pressure thereon, and a hose connected at one end 12. In the combination of claim 8, the feature that said means whereby said carriage is moved vertically comprises a rack secured to a vertical surface of said mast and a motor driven pinion on said carriage.

13. In the combination of claim 12, the feature that said pinion is driven through the intermediary of irreversible gears

Claims (13)

1. In a combination of the class described, an upper base mounted for horizontal movement relatively to an upper structure, a vertically positioned mast fixed at its upper end to said base so as to become an integral rigid part thereof, a movable mast mounted for vertical movement on said rigid mast, means for imparting vertical movement to said movable mast relatively to said rigid mast, a carriage mounted for vertical movement on said movable mast, means whereby said carriage is moved vertically relatively to said movable mast and together with said movable mast relatively to said rigid mast, said carriage having a vertical opening for the passage of both said masts whereby said carriage may be lifted vertically relatively to both said masts while completely encompassing both said masts, said carriage having a horizontal circular bearing formed outwardly about said vertical opening, and a platform rotatably mounted on said circular bearing and also formed with an opening for said masts.
2. In the combination of claim 1 the feature that said means whereby said carriage is moved vertically comprises a rack secured to a vertical surface of said movable mast and a motor driven pinion on said carriage.
3. In the combination of claim 2, the feature that the motor driving said pinion is a hydraulic motor, a source of hydraulic pressure for said motor on said platform, and means for connecting said source of hydraulic pressure to said motor.
4. In the combination of claim 4, the feature that said means for connecting said source of hydraulic pressure to said motor is a hose connected at one end thereof to said hydraulic pressure source and at the other end to a conduit fixed on said carriage, said fixed conduit and hydraulic pressure source being so positioned relatively to said hose that said hose forms a substantial U between said fixed conduit and said hydraulic pressure source when said platform is rotated to a point substantially midway of two extreme points relatively to said carriage.
5. In the combination of claim 1, the feature that the means for imparting vertical movement to said movable mast are power operated, independent power means comprising the means for lifting and lowering said carriage, power means for rotating said platform relatively to said carriage on said bearing, and control means for all saId power means on said platform.
6. In the combination of claim 1, the feature that said platform has an operator''s stand at one side of the axis of rotation of said platform, and a source of hydraulic pressure on a diametrically opposed side of said platform, said means whereby said carriage is moved vertically comprising a hydraulic motor on said carriage, and means connecting said hydraulic motor to said source of hydraulic pressure.
7. In the combination of claim 1, the feature that said carriage has a hydraulic motor and said platform has a source of fluid pressure thereon, and a hose connected at one end thereof to said hydraulic pressure source and at the other end to a conduit fixed on said carriage, said fixed conduit and hydraulic pressure source being so positioned relatively to said hose that said hose forms a substantial U between said fixed conduit and said hydraulic pressure when said platform is rotated to a point substantially midway of two extreme points relatively to said carriage.
8. In a combination of the class described, a mast, a carriage, a horizontal circular bearing on said carriage, a platform mounted on said bearing for rotation relatively to said carriage, said carriage and platform having each an opening within the area outlined by the circumference of said circular bearing, means mounting said carriage for vertical movement on said mast with said mast extending through both said openings so that said carriage and platform may be elevated relatively to said mast, and means for moving said carriage vertically relatively to said mast.
9. In the combination of claim 8, an upper base, a mast mounted at its upper end on said base and extending downwardly from said upper base, and means mounting said first mast for vertical movement relatively to said second mast with said second mast also extending through the said openings so that said carriage and platform may be elevated relatively to both masts.
10. In the combination of claim 8, the feature that said platform has an operator''s stand at one side of the axis of rotation of said platform and a source of hydraulic pressure on a diametrically opposed side of said platform, said means whereby said carriage is moved vertically comprising a hydraulic motor on said carriage, and means connecting said hydraulic motor to said source of hydraulic pressure.
11. In the combination of claim 8, the feature that said carriage has a hydraulic motor and said platform has a source of fluid pressure thereon, and a hose connected at one end thereof to said hydraulic pressure source and at the other end to a conduit fixed on said carriage, said fixed conduit and hydraulic pressure source being so positioned relatively to said hose that said hose forms a substantial U between said fixed conduit and said hydraulic pressure source when said platform is rotated to a point substantially midway of two extreme points relatively to said carriage.
12. In the combination of claim 8, the feature that said means whereby said carriage is moved vertically comprises a rack secured to a vertical surface of said mast and a motor driven pinion on said carriage.
13. In the combination of claim 12, the feature that said pinion is driven through the intermediary of irreversible gears.
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DE2808988A1 (en) * 1978-03-02 1979-09-06 Wahlefeld Geb Load handling devices for a facade elevator
US4286721A (en) * 1977-08-19 1981-09-01 Simon Engineering Dudly Limited Access equipment
FR2593486A1 (en) * 1986-01-29 1987-07-31 Thompson George Equipment has semi-adjustable platforms for service crane gantry
FR2609701A1 (en) * 1987-01-20 1988-07-22 Reel Sa Mat including telescopic cranes
US4815396A (en) * 1987-08-31 1989-03-28 Manco Corporation Of West Bend Suspended table
US4862764A (en) * 1987-08-31 1989-09-05 Manco Corporation Of West Bend Suspended table
EP0346246A1 (en) * 1988-06-10 1989-12-13 Reel S.A. Telescopic mast enabling maintenance of position and manoeuvring of a basket or a working platform, the displacements of which are controlled by a travelling crane
US5115886A (en) * 1988-07-08 1992-05-26 Iseki Kaihatsu Koki Co., Ltd. Movable platform for construction sites
US5152370A (en) * 1991-01-14 1992-10-06 Silberman Cyril J Bridge docking structure for aircraft
US5314083A (en) * 1985-08-13 1994-05-24 Mannesmann Ag Telescopic tower
EP0626339A1 (en) * 1993-05-26 1994-11-30 MERO-Raumstruktur GmbH & Co. Overhead crane with a working platform construction, in particular for aircraft maintenance
US5375283A (en) * 1991-01-14 1994-12-27 Silberman; Cyril J. Bridge docking structure for aircraft
US5868217A (en) * 1997-05-29 1999-02-09 Hines; Stephen P. Suspended work platform
EP0903319A1 (en) * 1997-09-18 1999-03-24 MANNESMANN Aktiengesellschaft Working platform, in particular for servicing aircrafts
WO2000077323A1 (en) * 1999-06-11 2000-12-21 Obo Utstyr As Arrangement of a working platform
FR2828183A1 (en) * 2001-08-01 2003-02-07 Reel Sa Aircraft maintenance installation/construction telescopic column having telescopic shaft with coaxial elements each collapsing next element and displacement using independent secondary levers.
US20050184194A1 (en) * 2004-01-30 2005-08-25 Schaefer Karl J. Hoist for aircraft cabin construction
WO2015113945A1 (en) 2014-01-29 2015-08-06 Cti Systems S.A. Apparatus for treating the surface or carrying out maintenance and/or inspection tasks of a vertical stabilizer of an aerial vehicle in a low interior height hangar
EP3296251A1 (en) * 2016-09-14 2018-03-21 Tiong Bin Seow A height accessible working platform with horizontally displaceable cradle

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US2553378A (en) * 1947-07-09 1951-05-15 Du Pont Material handling device
US3076522A (en) * 1960-10-03 1963-02-05 Harvey L Goodell Bridge scaffold apparatus
US3250399A (en) * 1964-12-24 1966-05-10 Harnischfeger Corp Stacker crane
US3269561A (en) * 1964-11-27 1966-08-30 Dresser Ind Latching mechanism for telescoping members

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Publication number Priority date Publication date Assignee Title
US2553378A (en) * 1947-07-09 1951-05-15 Du Pont Material handling device
US3076522A (en) * 1960-10-03 1963-02-05 Harvey L Goodell Bridge scaffold apparatus
US3269561A (en) * 1964-11-27 1966-08-30 Dresser Ind Latching mechanism for telescoping members
US3250399A (en) * 1964-12-24 1966-05-10 Harnischfeger Corp Stacker crane

Cited By (26)

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Publication number Priority date Publication date Assignee Title
US3814211A (en) * 1972-03-01 1974-06-04 Mcneil Corp Air space vehicle servicing apparatus
FR2368589A1 (en) * 1976-10-20 1978-05-19 Monk A & Co Ltd Way to renovate and clean structures tall
US4286721A (en) * 1977-08-19 1981-09-01 Simon Engineering Dudly Limited Access equipment
DE2808988A1 (en) * 1978-03-02 1979-09-06 Wahlefeld Geb Load handling devices for a facade elevator
EP0003982A1 (en) * 1978-03-02 1979-09-19 Gebr. Wahlefeld Hanging scaffold for walls with recessed parts
US5314083A (en) * 1985-08-13 1994-05-24 Mannesmann Ag Telescopic tower
FR2593486A1 (en) * 1986-01-29 1987-07-31 Thompson George Equipment has semi-adjustable platforms for service crane gantry
FR2609701A1 (en) * 1987-01-20 1988-07-22 Reel Sa Mat including telescopic cranes
US4815396A (en) * 1987-08-31 1989-03-28 Manco Corporation Of West Bend Suspended table
US4862764A (en) * 1987-08-31 1989-09-05 Manco Corporation Of West Bend Suspended table
EP0346246A1 (en) * 1988-06-10 1989-12-13 Reel S.A. Telescopic mast enabling maintenance of position and manoeuvring of a basket or a working platform, the displacements of which are controlled by a travelling crane
FR2632621A1 (en) * 1988-06-10 1989-12-15 Reel Sa Telescopic mast to ensure the maintenance and operations of a basket or working platform whose displacements are placed by a crane
US5115886A (en) * 1988-07-08 1992-05-26 Iseki Kaihatsu Koki Co., Ltd. Movable platform for construction sites
US5375283A (en) * 1991-01-14 1994-12-27 Silberman; Cyril J. Bridge docking structure for aircraft
US5152370A (en) * 1991-01-14 1992-10-06 Silberman Cyril J Bridge docking structure for aircraft
US5381575A (en) * 1991-01-14 1995-01-17 Silberman; Cyril J. Bridge docking structure for aircraft
EP0626339A1 (en) * 1993-05-26 1994-11-30 MERO-Raumstruktur GmbH & Co. Overhead crane with a working platform construction, in particular for aircraft maintenance
US5868217A (en) * 1997-05-29 1999-02-09 Hines; Stephen P. Suspended work platform
EP0903319A1 (en) * 1997-09-18 1999-03-24 MANNESMANN Aktiengesellschaft Working platform, in particular for servicing aircrafts
WO2000077323A1 (en) * 1999-06-11 2000-12-21 Obo Utstyr As Arrangement of a working platform
FR2828183A1 (en) * 2001-08-01 2003-02-07 Reel Sa Aircraft maintenance installation/construction telescopic column having telescopic shaft with coaxial elements each collapsing next element and displacement using independent secondary levers.
EP1288158A1 (en) * 2001-08-01 2003-03-05 Reel S.A. Telescopic column, especially for aircraft maintenance installation
US20050184194A1 (en) * 2004-01-30 2005-08-25 Schaefer Karl J. Hoist for aircraft cabin construction
US7270297B2 (en) * 2004-01-30 2007-09-18 The Boeing Company Hoist for aircraft cabin construction
WO2015113945A1 (en) 2014-01-29 2015-08-06 Cti Systems S.A. Apparatus for treating the surface or carrying out maintenance and/or inspection tasks of a vertical stabilizer of an aerial vehicle in a low interior height hangar
EP3296251A1 (en) * 2016-09-14 2018-03-21 Tiong Bin Seow A height accessible working platform with horizontally displaceable cradle

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