BACKGROUND OF THE INVENTION
Tower cranes are well known in the construction of high rise buildings. Depending on their size, tower cranes are used in the construction of medium to high rise buildings and the like structures. There generally is high tower standing at the side of the building site and taller than the anticipated site of the building. This tower crane has a long boom with a trolley thereon. The length of the boom must be longer than the proposed width of the building to be able to reach all corners of the building. A shorter end of the boom receives weights to balance the boom with a load at the other end. The weight cannot exceed a certain measure so that the boom stays somewhat balanced without a load and the load to be hoisted cannot exceed a certain measure to avoid overcoming the balancing load on the boom at the shorter end. This a very costly and time consuming operation when constructing a building of great heights.
BRIEF DESCRIPTION OF THE INVENTION
The HOIST, DECK AND PLATFORM SYSTEM invention may be referred to and abbreviated as HDPS.
The Invention is load hoisting and placement system that also serves as a mobile land based crane, jacking, shoring, deck platform apparatus. The inventive crane system is able to independently self climb most buildings or structures as they are being built as well many existing man made or natural structures such as rough stone, metal, smooth glass or wood. The invention can be operated remotely in real time via Internet, radio, cell or land based phones or hard wired or wireless systems. It can also be operated conventionally by lever or button controls. The ability to attach cameras to multiple mechanical arms independently allows for wide, normal and micro views of the overall work area. The invention may be operated from a central station manned by qualified operators. This reduces the need for a large off hour standing cranes often required by building codes for buildings being constructed over 6 floors high.
With optional bolt on power systems and drives, mobile unit can operate freely in tight, narrow or restricted areas because of its ability to be configured in a low and slim profile. In addition, it can expand its footing with extending mechanical arms serving as outriggers with tracks, wheels or pads. Theses robotic/hydraulic arms are able to continuously maintain a level platform base for a boom and/or deck(s) regardless of the surface the unit is supported by. The machine can be advanced from point to point with theses mechanical arms or legs. Additionally, attachments attached to the end of these will have the ability to attach themselves, by drilling, clamping blast charge fastener, screw placement, electro-magnetic devices, suction or adhesive application as the main unit is held in position while at least one arm secures a new firm position by one or more of these methods. In turn, one of the other several arms will repeat the process in proper order as the overall unit progresses and advances to its new location.
As a jacking and shoring system, the central structure/mast/beam with its outward leg brace attachments features allows for infinite connecting pints. The leg/brace arms can exert pressure away from or toward any surface it is in contact with. This will serve to adjust, hold, temporarily or permanently any structure such as a wall, floor or platform such as a deck as long as it is required.
Mounted on a truck trailer, the unit can be used to do typical crane work. A special transitional riser with enclosed an enclosed receiver sheave box (used to change various diameter sheaves) will allow the unit to be structurally un-attached from the deck surface and raised by hydraulic or pneumatic cylinders, hoist or crane into a vertical position. This allows the invention to be attached directly to a building, usually the floors. The main vertical center mast structure has within it several shorter adjustable deck clamps. These clamps are able to oppose one another in reverse fashion as hinged plate(s) contact each floor, usually two or more. Any floor thickness is acceptable as well as floor to ceiling heights for additional clamp placement. Once the deck/floor clamps are connected and the extending flanges are bolted to the vertical mast, additional support is obtained by connecting leg braces from the vertical mast to the floors and/or ceilings. This determination is made for each building by the engineer of record. The combined deck clamps and the bracing will have the effect of ‘bridging’ all floors together so that dynamic load forces of hoisting loads are distributed over all floors rather than one floor.
A small re-positioned hoist can easily be moved from floor to floor for lifting the fully operating or partial units up or down. Once in position, a self contained manual, electric, pneumatic or hydraulic operating crane can be attached to the top transitional cap system. The design of the invention's boom base has two hinged plate designs that have the ability to maintain a level or predetermined angle because of two or more hydraulic cylinders and/or wedge shaped fixed spacers placed between the lower and upper cap sections. This transition sections allows the wire rope/boom to function from horizontal through vertical positions without interruptions. One element of this new design provides the customer with several performance choices as far as speed, capacity and cost are concerned while still keeping the overall design small and very competitive. Where as a typical crane is very large, heavy and expensive often weighing hundreds of tons, this inventive concept has the ability to move much of the same material sized loads that standard sized cranes do. This invention uses the building's existing mass and stability for support and because of this, does not require very much weight itself. Therefore, the need for a ground boom with counter weights is not required to lift loads hundreds of feet high. Additionally, the central mast and center sliding internal clamps all have a hole at their center that allows the hoists/cranes wire rope or cable to pass directly through from one end to the other of the vertical mast, transition cap and over the boom point sheave to the ground. This allows the power system, hoist and related components to remain at ground level where they can be serviced, fueled or swapped out for larger performing systems as the building goes higher into the sky as it is being built.
The invention has the ability to pace the boom anywhere from the ground to beyond the top floor of the building and even build new floors. When loads need to be placed into the building interior from the open side of the building, outrigger platforms are typically being used. They are usually rigid fixed platforms cantilevered beyond the floor edge and they are held in position by standard post shore jacks placed between the floors and ceilings. A crane is required to move them on and around the building.
When theses units are used, they have to be staggered so as not to interfere with load placements on lower floors by obstructing the crane's wire rope or cable. When movable platform transfer decks are used, several units are often required or desired. They operate much like a ‘chest of drawers’. Most often, they protrude some distance outwardly from the building and present an obstacle as loads are lifted past them to higher floors.
To eliminate these issues, part of this new system includes a drop down deck that can fold up or down against the building front so that loads can quickly pass by without slowing down at every floor without hitting them.
Another design will show how a system of one or more split ring collars fastened to the vertical mast column will allow a fully rotational deck to be attached. The deck can be partial in shape such as a pie section, half circle or full 360 degrees circle in circumference to allow loads to be supported on it. They can work on or around the column, exterior or interior of the building or structure as required. A 180 degree deck/platform will allow for total load clearance once it is positioned inside the building away from passing loads.
It should be noted that the jack leg braces are in position and the screw/turnbuckle design feature can exert great pressure on the deck floor and ceiling from the top and bottom. This clamping effect can eliminate the need for hole placements in the building structure in many cases as determined by the Engineer of Record.
The system can be used as a suspended deck supported by one vertical mast that can be raised or lowered as neede4d. This deck(s) can be equipped with handrails for use by personal to work within confined area for safety. When required, additional vertical masts can be positioned parallel in a series along one full side of a building, a corner section or the full perimeter of a structure and connected together by their deck(s)/platform(s) and operated as one long continuous deck system. These combined units are able to be raised or lowered as a whole or staggered ‘in stair step’ manner. This eliminates any support having to originate from the ground level on a high building structure. Being that the vertical mast(s) have the ability to move diagonally across a wall type surface, the attached deck/platform systems are able to remain level to the ground for workers to work from.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the overall installation of the self-movable hoist system;
FIG. 2 Illustrates the hoist system with all terrain wheels located on a truck;
FIG. 2A illustrates a rear view of the basic crane assembly after having been unloaded from truck;
FIG. 3 shows the hoist system of FIG. 2 after unloading;
FIG. 4 illustrates a self-centering wheel in conjunction with two tracks;
FIG. 5 shows a winch box below a crane platform;
FIG. 5A illustrates all terrain wheels;
FIGS. 6, 6A and 6B illustrate various views of the winch box including sheaves located therein;
FIG. 7 shows the crane independent from a building while loading onto the building;
FIG. 8 shows a winch placed on an upper floor and operated by a person on the basic truck;
FIG. 9 shows the winch of FIG. 8 about to lift the crane assembly from the truck;
FIG. 10 shows the crane of FIG. 9 about to be received on an upper floor of a building;
FIG. 11 shows the crane of FIG. 10 after having been installed on an upper floor;
FIG. 12 shows the crane of FIG. 11 operating from the truck while lifting a load;
FIG. 13 shows the crane of FIG. 12 operating from a truck and lifting a load to an upper floor;
FIG. 14 shows a building deck with a vertical mast on the front of a building floor.
FIG. 15 illustrates a plan view of a cross section of the mast and inner deck clamp;
FIG. 16 shows the addition of an independent hoist boom with point sheave attachment;
FIG. 17 is a plan view of an attachment plate including a winch;
FIG. 18 is a plan view of an of an addition that allows for the independent raising or lowering the crane assembly from the truck on the ground;
FIG. 20 shows a side view of a personnel cage system that is being held in position by mechanical arms
FIG. 19 shows is a side view of a personal cage system that is being held in position by mechanical arms;
FIG. 20 is the top view of the cage system of FIG. 19;
FIG. 21 illustrates an example of a gear drive that moves the cage up or down;
FIG. 22 is a plan view of the system of FIG. 21 showing the cage moved into a different rotational position;
FIGS. 23-26 illustrates various ways of attaching mechanical arms to the mast assembly;
FIGS. 27 and 28 illustrate the crane assemblies configured on a typical building;
FIGS. 29 and 30 illustrate still other ways of attaching cranes to various buildings;
FIGS. 31 and 32 shows the movement of the crane assembly from one building type to another adjacent type building;
FIG. 33 is a close up of the movement of the crane of FIGS. 31 and 32;
FIG. 34 illustrates a vertical mast in position on the side of a Building;
FIG. 35 shows caged platforms attached to the mast in a staggered relationship from other platforms;
FIGS. 36-37 illustrates various combinations of staggered caged platforms relative to the building front;
FIG. 38 shows an extended cantilevered trolley with wheels;
FIG. 39 shows the trolley of FIG. 39 having a front drop down deck;
FIG. 40 is front view of the drop down deck of FIG. 40;
FIGS. 41 and 42 illustrate the trolley of FIGS. 40 and 41 with a forwardly extending personal cage;
FIG. 43 is a front view of the cage of FIGS. 41 and 42.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates an assembled hoist system on a building having the floors F with the inventive crane system installed thereon. The crane device 3 is installed on a transitional cap system 10. The crane 3 is operated in its up and down positions by a hydraulic or pneumatic piston 3a and shows a cable C which is trained over the sheave 2a which trained own through the middle of the mast assembly 12. The mast assembly includes a main vertical mast 7 which is stabilized in lateral attitudes by diagonal braces 8 and 9 which are attached to floor mounted deck clamp plates which are fastened to the floor F by way fasteners 5a. There is floor F platform P mounted on the floor F which platform has a winch 15 mounted thereon which operates the cable C through the center of the mast assembly 7 and 12. The plates 5 on the floor F and at the ceiling are also held in place by way of post shore jacks 17.
The boom shown in FIG. 1 is fully functional in that it can boom up, down extend outward or inward and rotate 360 degrees left or right. The boom can be of any type that can be attached to a base. The inventive boom has a sheave/wire rope positioned so that is centered in the holes or openings as it passes through the vertical mast.
FIG. 2 illustrates a truck T that carries all the necessary elements to a building site. The crane assembly is supported by a modified I- or -H beam(s) or other supporting structural member such as a round, square or rectangular or specially extruded or hollow formed tube which has a multiple of wheels 4 which will adapt themselves to any terrain on which the crane assembly is transported. At one end of the I-Beam, or the above described member, there is located a box enclosure B which has a sheave 6 located thereon for the purpose of diverting the cable C running from the winch/hoist 6a located on the truck T. The enclosure B has located thereon the transitional cap system 10 which is shown in FIG. 1 on top of the mast. As is shown in FIG. 1, FIG. 2 and FIG. 3 The crane 3 is mounted and supported on the transitional cap system 10. FIG. 2 also shows the leg braces 8 (FIG. 1) placed on top of the I-beam which are placed on top of the of the above described structural members or I-Beam.
FIG. 2A illustrates a rear view the basic crane assembly on a ground. The sheave 2 can be seen guiding the Cable C on its way to the crane by way of the sheave 6 which is located in the enclosure B (FIG. 2).
FIG. 3 is a side view of the basic crane assembly positioned on the ground with its all terrain wheels 4. In this view the transitional cap 10 is hinged at 10a and is operated in a rotational movement by the hydraulic or pneumatic cylinder 13. The I-beam P has at its end a sheave 2 to properly guide the cable C on its way to the crane 3. Again the leg braces 8 are shown on top of the I-beam P.
FIG. 4 shows the basic crane assembly on top of all terrain wheels 4 having a self-centering wheel 4a in conjunction with two wheel tracks 4. All of the call outs have been explained with FIGS. 2 and 3.
FIG. 5 is a more detailed view of FIG. 4 except that both wheel tracks are still mounted on the basic mast P. At the right end of the Mast P is shown the box enclosure b having the transitional platform 10 mounted thereon including the sheave 6 which properly guides the Cable C to the crane 3. The attitude of the crane 3 is controlled by a hydraulic or pneumatic cylinder 3a. This Fig. also shows the importance of a hollow boom having a sheave 6 at its bottom to pass the cable C there through to the top of the boom (shown in later Figs.) where the crane 3 is located on top of the transitional platform 10.
FIG. 5A shows the wheel tracks 4 by itself.
FIG. 6 illustrates the box enclosure B in a side view. The box enclosure B consists of the mast elements 11 and 12 which form the basic elements of the overall mast structure 7 which will be further explained below. Also shown is the sheave 6.
FIG. 6A is rear view of the box enclosure B.
FIG. 6B shows the sheave 6 by itself removed from the box enclosure B.
FIG. 7 illustrates the crane assembly still mounted on the truck T on the ground G being able to hoist a load L to a higher level which is independent of any other use of loading equipment. The crane boom 3 is adjusted to different attitudes by way of the power cylinder 3. Also notice that movement of the various elements is controlled by an operator using a remote control R.
FIG. 8 shows a load such a platform having a winch 15 and a sheave 16 thereon having previously been placed on the floor F by the independent crane assembly shown in FIG. 7.
FIG. 9 now shows how the winch 15 is now used to hoist the basic crane assembly 3 from the truck T after the crane assembly has been disconnected from the truck. The building structure consists of several floors F and floor may be chosen where the basic crane assembly 3 should be installed. The basic crane assembly 3 has the transitional cap system 10 attached to the mast consisting of elements 11 and 12. The cap 10 is hinged to the cap 10 by a horizontal hinge 14 and is operated into different positions by the power cylinder 13.
FIG. 10 illustrates the same view as FIG. 9 except that the crane assembly 3 has now arrived at a predetermined floor F. and is ready to be installed thereon.
FIG. 11 illustrates the progression of the installation of the crane assembly 3 by installing various braces to stabilize the overall crane assembly. The diagonal braces shown in FIG. 1 at 7 are now installed above and below the floor F. Also the post shore jacks are used to strengthen the installation between the two floors F.
FIG. 12 illustrates the further construction of the basic crane assembly 3 there by adding various extensions to the mast structure 7 (FIG. 1) which consists of the various elements or components 11 and 12 which will form a hollow structure possibly of a square configuration. In FIG. 12, there is an upper mast structure 7 which is being extended to a greater length by adding another mast structure 7a to its lower end. After the lower mast structure 7a has been added, a load L can be hoisted by the winch 6a and the truck by guiding the cable C through the box enclosure B, through the center of the mast assembly 7 and 7a and further through the crane 3 located on top of the transitional cap assembly 10 (FIG. 1). The load L can be hoisted to different floor levels as will described below.
FIG. 13 illustrates how a load L may be hoisted to different floor levels which is hoisted by a cable coming from a winch 6a on the truck L.
FIG. 14 shows the same operation and hoisting a load L as was shown in FIG. 13 except that an independent power system has been placed on the ground to thereby dispense of the truck L. The power system 18 has a winch 18a thereon which powers the cable C running through the box enclosure B and up through the center of the mast assembly 7 and 7a.
FIG. 15. This a plan view to show a cross section of the vertical mast and the inner deck clamp 19 with a hinged deck plate in a lowered and connected position to the building floor F. The front of the building floor F is designated as FE. The connecting bolts 25 are connecting the center deck clamp 19 to the inward vertical mast element 12. The main hollow mast shows outer walls 20 and contains an inner sliding deck clamp having a center hole CH for containing the cable C therein and the sliding deck clamp 21 has friction material 22 between the inside wall of the hollow and itself. As will be shown below, the deck clamp 19 has a forward horizontal hinge element 19a.
FIG. 16 shows a building deck or floor F with a vertical mast on its left side. The far outer extension or vertical mast element 11 has rectangular holes 11a for attachments or the use by gear wheels which be explained below. The other vertical mast element 12a has holes that allow leg braces to be attached as needed.
FIG. 17 is a plan view showing an attachment 26 that will fit perfectly over the outer two vertical extensions 12 and 12a. This allows for an independent lifting or lowering by the existing or internal hoist. It can also be self-powered with its own power/motor direct gear drive system (to be explained below) that will allow it to move as needed up or down to any given point. Also this FIG. 17 shows its own winch assembly 23 which is mounted on the deck clamp plate 19 Just inside from the floor edge FE.
FIG. 18 shows the addition of the of the independent small boom with a sheave 24 mounted thereon that is used by way of the cable C for independently raising or lowering the inventive crane assembly from the Truck on the ground onto the building and on to higher floors. The sheave 24 directs the cable C through the center opening in the main boom and on to an attachment point of the main vertical mast, usually at the base. In this Fig. notice the front edge FE of the floor F. The deck plate clamp is shown at 19 which has the winch 23 mounted thereon.
FIG. 19 is a plan view of a personal cage system which is being held in position by at least two mechanical arms 28 and 29 which are being hinged 28a and 29a and are further connected at their other ends to the attachment plate 26. The mechanical arms 28 and 29 have full rotational and extension or retraction ability at all connecting points giving them a complete range of motion as needed. All other reference call outs have been shown in FIGS. 17 and 18.
FIG. 20 is a side elevation view of FIG. 19 showing the personal cage 27 with its mechanical arms being connected to the attachment plate 26. This platform system 27 can be moved up or down on one of the vertical masts by a dual wheel drive 30. Also shown in this Fig. are the extending brace arms 8 and the connecting flanges 8b.
FIG. 21 is a vertical side view of the personal cage system with its dual gear drive system. The personal cage is shown in a rotational position. The attachment plate 26 has on arm 26a attached to it is a receiver hook 26b for making mid-air load exchanges. Another arm 26c is attached to the attachment plate 26 and is fitted with a claw type holding attachment 32. This Fig. also shows the dual wheel assembly which is riding on a vertical mast which has elongated slots therein which serve as the counterpart of the gear wheel assembly. The whole assembly of FIG. 21 is supported by the deck plate clamp 19 which has a horizontal hinge 19a just forward of the floor edge FE
FIG. 22 is a top plan view of the side view of FIG. 21. It is noted that the personal platform is placed in a rotational position relative to the attachment plate 26. At the opposite end of the attachment plate 26 is located the deck plate clamp 19 which ahs the horizontal hinge 19a mounted thereon extension which is hinged to the attachment plate 26 by way of the horizontal hinge 19a. This deck plate clamp has mounted thereon a winch 15 which trains its cable C over the sheave 24 into the hollow mast assembly through its center.
FIGS. 23-26 illustrate how various attachments can be mounted onto a vertical mast.
FIG. 23 is an all position clamping device for the mechanical arms 28 and 29 which are attached to the clamping device by way of an electro magnetic device.
FIG. 24 is designed for an electro-magnetic to a an iron or steel surface. Again this mode of attachment has the mechanical arms 28 and 29 attached thereto for purposes described above.
FIG. 25 illustrates a multi-rotational unit which again is attached to iron or steel components by of an electro-magnetic force. The mechanical arms 28 and 29 are attached to a plate 35 which consists of a rotational arrangement whereby the mechanical arms can be oriented into various positions. The plate 35 may attached to a vertical mast by of the electro-magnetic device 34. The multi-rotational unit, once installed, allows for a placement And use of specialized drills, screw drives, impact devices, blast change fasteners and adhesive dispensing etc.
FIG. 26 illustrates a suction cup device for a smooth surface attachment and, of course, dis-attachment.
FIG. 27 illustrates the inventive concept applied and configured on a typical building. This Fig. shows an option for allowing the inventive unit to make a transition from the vertical to horizontal by using the pivotal action of the track attachment. The hinged cap attachment 14 with the connected hydraulic or pneumatic piston 13 (FIGS. 9 and 10) assists in orienting the crane 3 into different positions as is required during a movement. In this Fig. there is provided a central ground based power device consisting of two winches W which can service both left and right cranes 3. The cables C are trained over two sheaves 37 under the floor F to further sheaves 36 and around the same to both left and right cranes 3. Both cranes 3 consists of vertical booms 12 and diagonal braces 8 (see FIG. 16, for example).
FIG. 28. shows the concept of FIG. 27 where the left crane 3 is in a pivotal movement but in this FIG. 28 the crane is in position and ready to be used.
FIG. 29 shows the crane in a horizontal position after undergoing the pivotal movement described in 27. This crane assembly can be transported on the floor F by way of the wheels 4 (see FIGS. 4 and 5) to different locations as required. Such a crane assembly 3 can be moved to the opposite side of the building to be installed there.
FIG. 30 shows the same view as shown in FIG. 7 except that the crane assembly 3 has continued in its pivotal movement to further illustrate the capability of the inventive concept of a self-climbing hoist.
FIG. 31 Shows the capability of the inventive crane assembly fitted with one option for allowing the until to make a transition from a vertical position to a horizontal position by using the pivoting action of the track attachment. This arrangement is quite valuable when encountering different building construction as shown by a diagonal brace D where the unit would encounter another building structure. The same reference numbers are placed in this Fig. as can be found in FIGS. 27 and 28.
FIG. 32 is the same view as is shown in FIG. 31 but it shows the progression and advance of the self-climbing hoist 8 having the crane 3 thereon. In this FIG. 32, the unit has just started the climb onto the diagonal D. This Fig. also shows the mechanical arms 29 which are instrumental in aiding the progression of the unit 8. At FH are shown different floor heights. The crane assembly 12 has already been installed on the opposite side of the building
FIG. 33 illustrates the same view as is shown in FIGS. 31 and 32 but in an enlarged view. The self climbing hoist 13 including the crane 3 is moving along the diagonal brace D and is hoisted by the cable C along the sheaves 35. At 29 are shown the hinged support arms 29 having the attachment features shown in FIGS. 23-26. At FH is shown a building floor being located at a different height.
FIG. 34 shows a somewhat close and side view of the main mast consisting partly of the masts 11 and 12. The mast 11 is fastened to the front edge of the floors F and is further supported by the diagonal braces 8 and the braces 9 which are the leg braces extending close to the floor F. The forwardly extending masts 12 have loading platforms attached thereto which also have the diagonal braces 8 and the floor braces 9 attached thereto for stabilizing purposes.
From FIG. 34 it can be seen that lower loading platform 46b extends somewhat more forwardly than the upper loading platform 46. The reason for this arrangement is that the cable C with a load thereon can easily bypass the upper platform 46 so that a load can be delivered to a lower loading platform 46b. The vertical braces 17 between the floors F and between the loading platforms 46 and 46b provide a support for an overload protection.
FIGS. 35-37 illustrate the same basic principle as is shown and explained with regard to FIG. 34 except that in arrangement one of the forwardly extending platforms 46c can be rotated around the split collar ring 40 to thereby being able to be moved in all directions as can be seen in FIGS. 36 and 37. Thereby, when a loads L are deposited on their respective loading platform 46c the platform can be turned so that the load cab delivered to a predetermined floor F as is shown FIG. 37.
FIG. 38 illustrates a different loading platform consisting of longer wheeled handrail shuttle 43a which is similar to the loading platform 46 or 46c but it is movable on a floor F once it turned into that direction. The extended wheeled handrail shuttle 43a has wheels 44 thereon so that it can be moved onto the respective floor F. Part of the wheeled handrail shuttle is the H-beam 41 on which the shuttle 43 is mounted. This compares to the platform apparatus P of FIG. 3. The shore jacks 42 are similar to the ones 17 shown in previous Figs.
FIG. 39 is a side view of a further development of the handrail shuttle 43. The front of the shuttle 43 has attached thereto the platform 46 shown in FIGS. 35-37 but is hinged thereto by way of a horizontal hinge 46a. The platform 46 is operated in an up and down movement by way of a winch 45 mounted on the handrail shuttle 43. The cable C from the winch 45 is trained over a fulcrum lever or hinged arm 47 and then attached to the front of the hinged platform 46.
FIG. 40 is front view of the of the shuttle 43 with the hinged platform located in a downed position.
FIG. 41 illustrates a further development of the wheeled handrail shuttle 43 in a forward position past the front of the floor F so that a load can be delivered onto the platform. The wheels 44 are shown in several views in FIG. 41. Once at the rear end of the shuttle 43, the second time in the circle between the FIGS. 41 and 43 and the third time in the front view of FIG. 43.
FIG. 42 is a side view of the handrail shuttle 43a which is operated by the winch 48, by way of cable C and the fulcrum lever 47 and in this Fig. the hinged platform 43a is shown in a horizontal and load receiving position.
FIG. 43 is front view of the hinged platform in up position. This view shows the platform designated as 27 because it compares to FIG. 27 wherein it is designated as 27 for the purpose of transporting personnel.
Patent Grant
8584801
