This invention relates to a Pick-n-Carry crane.
BACKGROUND OF INVENTION/PRIOR ART
Pick-n-Cariy crane is known to have been provided, which is widely used to lift loads and place at different position. Pick-n-Carry crane has many loose structural parts which form the lower part of the crane, most commonly known as Main Frame, A Frame, Craddle and Yoke Assembly. These constitute the front part, which are coupled to chassis by pins.
In currently available cranes, the number of loose parts and the resultant tolerances in fabrication and assembly of these parts results in cumbersome assembly procedure, more number of joints, and free play between various joints which in turn leads to misalignment of front and rear portion and tilt of normal crane either to front or rear. It also results in uneven loading in two planes on steering cylinders and hence heavy cylinders with bearings are to be used. Also since anchoring points are distant apart, longer steering cylinders are required. These cylinders are mounted outside the frame, susceptible to damage due to hitting by any external object and also form the lower most part of the crane.
The center pivot or joining of both frames is normally a two point joint without self aligning bearings. Hence, this point is heavily loaded and also the flexibility is more in cradle yoke assembly which has freedom to rotate in two plane. This allows crane tilting excessively in the steered direction with load which in turn leads to toppling of crane in that direction.
Since there is no suspension on the crane, therefore while moving in undulated ground with holes/pots on the road the whole crane structure shakes and creates lot of vibration for operator and to the structural parts.

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Moreover in toppling situation, whole crane acts as a single body causing lot of toppling of cranes in case of side instability.
Lift cylinders for use in a crane are as such known in the art. Such cylinders normally have mounting on Front Axle through a bracket welded on the front axle. These cylinders are mounted through pins on this bracket. It would be apparent that when crane lifts the load, weight is transferred on front axle of the crane. Also these cylinders are very close to suspended load with a risk of load hitting the cylinder rod. To obviate such a disadvantage, it is also known to have been provided 'Jack Guard' fixed on main frame and T' Handle fixedly held to the boom. Though the provision of these does to a certain extent reduce the disadvantage of a load hitting the cylinder, it has been found that such a construction still possesses restrictive applications as follows
1. Excessive load on front tyre and axle.
2. Steel plates and long pipes can not be lifted by these type of cranes as the effective lift area as per load chart is not practically utilized in application.
Another construction known in the art and normally employed in heavy lift capacity Revolving and Truck Mounted cranes comprises lift cylinders mounted on the chassis towards rear.
In a crane, boom is an important part, which is used to lift load from one position and place it to another position. Normally these booms have one or more members which move in and out through hydraulic cylinders. At the boom end side, one block with hook is available which is mounted through rope laid on a winch. This unwinds or winds the rope when the members are moved out or moved in. Hence, when the operator actuates the members, firstly it is required to loosen the rope to avoid any possibility of rope getting loaded which may result in rope breakage or winch getting uprooted.

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In a crane normally the jib head [i.e. outer most portion of last sliding member] is provided in such a way that, it is vertically bigger than horizontally, resulting hook block at lower height and wastage of actual working height utilization in a boom.
Rope was being laid horizontally / vertically in booms by many manufacturers. However the more innovative design is being introduced recently where strength, ease of operation, operation abuse and safety related issues are addressed.
In these cranes, the operator cabin is at the rear rigidly mounted on counter weight assembly and chassis. Hence, there is always jerk on operator while moving and also due to misalignment of member's cabin. Also being rear most member of the crane the front and side visibility is always poor requiring greater operator effort while driving on road, which is associated with increased chances of creme hitting the objects. In most of the cranes the cabin entry is from rear. Normally these types of cranes are fitted with stick steering with craning levers in front requiring operator to move to front for operating these levers. Further, the cranes have long dashboard having individual gauges and switches with less leg room.
Normally in these cranes boom pivot point is at higher height to achieve greater under hook height. But it also results in higher center of gravity and hence more chances of toppling of crane, as mostly crane works in rough and undulated places thereby causing shift of CG faster and out of the safe zone.
These cranes have tractor transmission in which gearbox and transmission is directly coupled to the engine. Moreover the transmission is sliding mesh. Hence, gear shifting is difficult, which requires more effort by operator. Therefore, it is not possible to shift gears while on move. The clutch is having mechanical linkage which needs setting for CLUTCH FREE PLAY and clutch

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A craning operation requires lot of accessories like slings, hooks etc which an operator has to carry along with the crane to the site. Normally in the existing cranes, there is little or no space for covered lockable tool box in which items can be safely kept. However, the tool box can be provided beneath main frame, but with poor access.
Further, the all-round visibility in these cranes is very poor. In front of operator the main frame and booms are placed with very little front visibility. In rear the operator sits at a height, who is unable to see the objects lying low, thereby hitting the crane comers during craning operations. Also he has to work in a tight space with load and hence has to depend lot on rear view mirror which is fixed either inside cabin or side of the cabin providing limited or very less visibility. There is no provision to inform the operator that some site worker or object is close to crane in either position. Usually, he depends upon the helper and also misses the objects resulting in collision and damage. Crane lifts load from front and in that position whole load comes on to front tyres. Further, there is no provision to mount outriggers/stabilizers and in case of one tyre having less air pressure or the loose undulated ground the load lifting is very difficult.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a Pick-n-Carry crane which overcomes disadvantages associated with the prior art.
Another object of the present invention is to design the jib head with more narrow depth to make full utilization of working height.

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Purther object of the present invention is to design boom section "T" type in such a way that ensures proper force transfer from one member to another and wider nylon pads for ensuring bigger contact area and less pressure on pads.
Still another object of this invention is to propose a novel construction of a main frame for use in a crane.
Still another object of the present invention is to provide a Pick-n-Carry crane which is efficient.
STATEMENT OF INVENTION
According to this invention, there is provided a pick-n carry crane comprising of front and rear frame joined together, wherein a plurality of luff cylinders are mounted on the front frame and connected to boom assembly at a distance and a plurality of steering cylinders are mounted inside rear frame.
SUMMARY OF THE INVENTION
In this invention, crane structure is divided in two frames (front frame and rear frame) which are innovatively joined together using self-aligning bearings at two points.
The front frame has atleast two plates at top and two at bottom and rear frame has atleast two plates one each at top and bottom which goes inside the front body plates and are in place with the help of self-aligning bearings and straight pins. These pins are supported on two plates and hence are always in double shear.
In this invention, additional extension and retraction ropes are mounted inside the boom which holds the extendable boom members and also adjusts

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themselves in such a manner that when the members are moving out or moving in, it ensures the rope length does not change and hence hook block remains stationary at its position.
The novel boom assembly is associated with the following advantages-
1. Auto adjusted hook block
2. Multiple (one, two or three) extendable boom
3. Special profile jib head giving rise to maximum pin height
4. Safety system having no electrical wire or rope, to give audio-visual alarm in case of butting hook block with jib head together with machine cutoff.
5. Ensures crane operator operates the machine without making any operation error.
Again, the Luff cylinders are mounted in such a way on Front Frame that they are positioned rearwards on frame and maximum towards front on Boom resulting highest strength of Boom members and lowest luff circuit pressure.
In this design of crane operator cabin is mounted on front in such a way that it is safe from load lifted by crane and provides all round visibility to the operator.
Also cabin mounting is on chassis, which is free from counterweight.
The driveline used is industrial and having synchromesh transmission which results in less noise and easy gear shifting while on move. The auxiliary gearbox is provided between Main Gearbox and Axle ensuring HIGH TORQUE and slow speed transfer to axle resulting excellent greadeability and lower creep speed during craning operation. These are connected through heavy duty propeller shafts.

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The whole engine module is accessible from all sides and engine can be removed easily from rear frame without opening other components. The daily checks can be easily performed on engine and other driveline parts.
The rear axle is mounted through LEAF SPRINGS on rear frame. They provide cushioning from jerk to axle and hence smooth ride of the crane. It also balances the crane front and rear axles independently when the load is lifted in front, crane is steered and even working on undulated ground or side slopes.
The front frame has provision of mounting stabilizer cylinders which provides extra support 86 strength to front module and enables operator to lift load even when the air pressure in tyre is less or machine is on an undulated ground.
The front frame having mounting brackets for mounting lift cylinders for use in a crane.
The front frame has lift cylinder mounting towards rear, which obviates the disadvantages of the prior art.
The main frame has lift cylinders mounting on main frame , which is safe.
The operator cabin is positioned in such a place which is free from possibility of load hitting in case of accident with all round visibility.
The engine 85 transmission are mounted in such a way that they are independent with easy dismantling in field for any service work.
The rear axle is mounted on leaf springs providing jerk free operation, wherein rear body tilts balancing the front body with load in all conditions of steering.

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The driveline having synchromesh transmission is used enabling operator to change gears while on move with less operator effort. This reduces noise and also increases the life of gears.
Larger fuel and hydraulic tanks are provided which are easily approachable and can be removed easily with out dismantling any other part.
Compact steering cylinders are provided which are inside the frames and are not the lowest point of crane.
All round visibility and warning for objects coming close and in the range of collision / damage.
Stabilizers/outriggers are provided on front frame to provide stability to crane during load lifting operation.
A utility tray/box/platform is provided for operator where he can keep his tools, tackles or any other construction material. He can also seat the co-driver / helper while shifting from one site to another.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows: crane general layout.
Fig. 2 shows: winch rope and connection thereof.
Fig. 3 shows: jib head of the present invention, rope laying and pulley
arrangement on hook block.
Fig. 4 shows: rope anchoring arrangement and luff cylinder mounting brackets.
Fig. 5 shows: boom sections and pads.
Fig. 6 shows: anti two block wireless system.

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DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO ACCOMPANYING DRAWINGS:-
The present invention is directed to a pick-n-carry crane. Reference may be made to figure 1, in which crane general layout is shown. Said crane comprising of Front Frame(l), Rear Frame(2), Center Pivot Joint Lower(3.1), Center Pivot Joint Upper(3.2),Boom Assembly(4), Luff cylinders(5), Luff cylinder mounting bkt on front frame(5.1), Luff cylinder mounting bkt on boom(5.2),Boom Pivot point(6), Winch(7), Cabin(8), Leaf Spring (9), Hydraulic Tank(lO), Fuel Tank(ll), Tool Box(12), Counter Weight(13) and Bonnet Assembly(14) connected to each other 8c working in combination.
The invention of the proposed application comprising of atleast two parts i.e. Front Frame(l) and Rear Frame(2) joined together by two point (3.1 86 3.2) having self-aligning bearings which allow oscillation and rotation of both frames independently. Further, it allows both the frames to tilt independently of other increasing the rough terrainability of the crane. Also the assembly - disassembly of the crane becomes very easy. These pins are in double shear due to sandwich design of plates where rear frame plate is in-between the front frame two plates at top and bottom.
The present invention comprises of boom members actuation mechanism in a crane which has multiple extendable members. The rope used in this actuation mechanism ensures that the hook block meant for load lifting operation does not change its position until winch is operated to ensure crane operator operates the machine without making any operation error. Also anti two block system is provided without any actuating mechanical components to give pre warning in case of hook blocks damaging jib head.
Luff cylinders(5) are positioned is such a way that they support the Boom assembly(4) at a greater distance making it more stronger and increasing the

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load lift capability of crane. Also the hydraulic pressures are much lower for same load as compgired to conventional design.
Boom pivot (6) is much lower in height enabling lower center of gravity and hence better stability of crane. Winch(7) is mounted on the Boom top which ensures rope is always parallel to mother boom while boom moves up and down and also winch height is much lower allowing crane to go inside cramped places and position load.
Cabin(8) is directly mounted on Front Frame(2). Counter weight(13) is free from cabin and can easily be removed without affecting cabin.
Cabin is positioned in such a way that operator has full control on craning load. The operator moves with the load, unlike rear chassis mounted cabin. Fatigue to operator is reduced due to positioning of cabin and controls.
Rear axle is mounted on the Leaf Springs(9) providing safety to axle and allows jerk free smooth ride of crane. It also balances the rear and front body as per load lift condition and depending upon the working area.
Hydraulic(lO) and Diesel(ll) Tanks are mounted on sides resulting full access to operator on both tanks, wherein tanks are independently dismountable. It also provides free access to engine compartment and ease in doing any work on driveline parts.
One big Tool Box(12) is provided in the front in between front tyres in which any accessories can be provided required for craning operation.

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.Bonnet(14) can be lifted together as a set while working on engine. Both sides of bonnet opens upwards providing full access to operator on both sides of engine.
Inside counterweight a rear view camera(15) is provided which moves with rear body. A display screen is provided inside cabin to provide full visibility to operator while crane is on move.
At front and sides proximity sensors(16) are provided which gives audio-visual warning to operator when any objects comes in close vicinity.
The steering cylinders(17) provided in the center are much shorter in length and higher in height wrt ground. Also they are concealed inside frames and hence are protected from external objects and do not constitute the lower most part of the crane.
Hydraulic clutch is provided which results in less operator pedal effort and no mechanical losses due to play in linkages.
A utility tray/box/platform(18) is provided for operator where tools, tackles or any other construction material can be kept. It is also possible to seat the co-driver / helper while shifting from one site to another.
Reference may be made to figure-2, in which winch rope holds the second member through pulleys with bearing and is connected to hook block which is parallel to boom assembly. This configuration has the advantage that "Hook block does not change its position until winch is operated."

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Reference may be made to figure-3, in which jib head wit±i special profile is shown and also the rope laying and pulley arrangement on hook block is shown, wherein ropes on hook block axe parallel when viewed from front of the boom. This configuration has following advantages -
1. Hook block does not enter in jib head during full retraction.
2. Hook block due to special boom design and rope layout ensures that, it always moves parallel to ground at any angular position of boom.
3. Jib head profile ensures the highest pin height and maximum vertical clearance of hook block.
4. Special geometry ensures that the no. of falls per pulley can be changed as per requirement.
5. Hook brackets are positioned in a way ensuring direct mounting of hooks rather using intermediate 'Dee' Shackle and additional link points.
6. Ropes are laid parallel on hook block when viewed from boom front ensuring hook block always moves straight even at no load.
Reference may be made to figure-4, in which rope anchoring arrangement and luff cylinder mounting brackets are shown. The advantages are given hereinbelow:
1. Rope anchored close to mother boom bulk head resulting in safety to rope from damage.
2. Shorter rope length.
3. Boom luff cylinder mountings are spread out to achieve machine stability, lesser deflection and torsion.

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Now, referring to figure-5, in which boom sections and pads are shown. The advantages are as follows:-
1. Overlap of extensions are so designed that the loading on pads is optimum during boom full extension and lifting maximum load as defined in load chart.
2. Extendable section of boom has special box geometry, offering higher modulus and maximum strength.
3. Large seating space for resting pads (larger contact between moving sections) thus reduces play and torsional loads.
4. Extension and retraction ropes are clamped on boom top plate.
5. Single pin (in double shear) used on top pulley mounted on first extension, resulting easy assembly and disassembly and pin is simply supported between two plates means double shear.
6. Side pad locking arrangement is special having simple screw by who's tightening or untightening gap between two sections can be increased or decreased.
Referring to figure-6, in which provision of safety switches like "limit switch" is shown. A novel "ANTI-TWO BLOCK SYSTEM" fitted with wireless sensor for the prevention of damage to the boom tip of the crane by the travelling member wherein the two block system of the present invention includes an engaging mechanism movably mounted with the boom tip for engaging the travelling member when the travelling member moves into close proximity to the boom tip during lifting operations of the travelling member with the crane for the prevention of damage.

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Advantageous Features;-
Lesser structural parts for ease of assembly, lower center of gravity for improved stability both from front and side tipping while lifting &> moving with load, unique two point swivel center joint. Rear axle mounted on leaf springs, luff cylinders mounted uniquely on front frame and connected to boom assembly at a greater distance enabling better load lift capacity and improved strength of members, front mounted cabin for all round visibility, automotive dashboard with instrument cluster and compact switch panel provided inside cabin, wheel steering, all controls within easy reach of operator, side mounted tanks with increased capacity and air space for easy approach and serviceability. Synchromesh transmission coupled to engine and hydraulic clutch. Steering cylinders are mounted inside Rear frame and are compact in size, thereby providing protection to them from any external object. Also a bigger tool box in front is provided for keeping all the accessories. A camera is provided at rear inside the counterweight providing full rear visibility of rear end to the operator and the screen for display is mounted inside the cabin in front of the operator which gives live picture of rear. This is fully protected inside weight with care against anti-theft. Since camera is fitted at the rear module which steers during steering operation, it provides rear visibility in all conditions and operator needs not to always turn at rear. Also at front and sides the proximity sensors are provided which gives operator the audio-visual warnings when an object comes in close vicinity to crane front or side. It also shows the distance of object from the crane body in front as well as in side positions. The display screen is mounted inside the cabin in front of the operator. Stabilizers/outriggers are provided on the front chassis giving more strength to crane and operator can do operation even in undulated loose ground and also while tyre pressure is less.
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims: -

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WE CLAIM
1. A pick-n carry crane comprising of front and rear frame joined together, wherein a plurality of luff cylinders are mounted on the front frame and connected to boom assembly at a distance and a plurality of steering cylinders are mounted inside rear frame.
2. A pick-n carry crane as claimed in claim 1, comprising of a plurality of stabilizers/outriggers on the front chassis imparting more strength to crane, wherein operator can operate in undulated loose ground and also with less tyre pressure.
3. A pick-n carry crane as claimed in any of the preceding claims, wherein the luff cylinders are positioned rearwards on frame and maximum towards front on boom resulting highest strength of boom members, increase in the load lift capability of crane and lowest luff circuit pressure.
4. A pick-n carry crane as claimed in any of the preceding claims, wherein the front frame comprising of atleast two plates at top and also at bottom and rear frame comprising of atleast one plate at top and also at bottom which goes inside the front body plates such as herein described.
5. A pick-n carry crane as claimed in any of the preceding claims, comprising of additional extension and retraction ropes mounted inside the boom holding extendable boom members and adjusting themselves such as herein described.
6. A pick-n carry crane as claimed in any of the preceding claims, wherein crane operator cabin is mounted on front and the driveline is having synchromesh transmission coupled to engine and hydraulic clutch, in which auxiliary gear box is provided between main gear box and axle.

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7. A pick-n carry crane as claimed in any of the preceding claims, wherein the front frame has provision of mounting a plurality of stabilizer cylinders which provides extra support and strength to front module and enables operator to lift load.
8. A pick-n carry crane as claimed in any of the preceding claims, wherein winch is mounted on the boom top which ensures rope is always parallel to mother boom while boom moves up and down, in which winch height is much lower.
9. A pick-n carry crane as claimed in any of the preceding claims, wherein tool box is provided in the front in between front tyres, a rear view camera is provided inside counterweight and a pluredity of proximity sensors are provided at front and sides.

10. A pick-n carry crane as claimed in any of the preceding claims, wherein the steering cylinders mounted inside rear frame are shorter in length and higher in height with respect to ground, and rear axle is mounted through leaf springs on rear frame.
11. A pick-n carry crane as claimed in any of the preceding claims, is associated with the advantages/advantageous features such as herein described.
12. A pick-n carry crane substantially as herein described with reference to the accompanying drawings.
Dated this 19^^ June, \ 2012
(SOMA RANI MISHRA) OF L.S.DAVAR & CO., APPLICANT'S AGENT