A material handling machine

Abstract

A material handling machine comprising: a body mounted on a ground engaging structure; a lifting arm pivotally mounted to the body; a gas engine configured to provide motive power to the ground engaging structure; an operator cab mounted to the body adjacent the lifting arm; at least one storage tank for supplying a gaseous fuel to the gas engine, wherein the at least one storage tank is located towards a rear of the material handling machine.

Description

[0001] P605359GB00

[0002] A Material Handling Machine

[0003] FIELD

[0004] This invention relates to a material handling machine. In particular, though not exclusively, the invention relates to a material handling machine having a pivoting telescopic working arm.

[0005] BACKGROUND

[0006] Off-highway vehicles / working machines are typically those used in construction industries (e.g. backhoe loaders, slew excavators, telescopic handlers, forklifts, skid-steer loaders, dump trucks, bulldozers, graders), agricultural industries (e.g. tractors, combine harvesters, wheeled loading shovels, telescopic handlers, self-propelled harvesters and sprayers), quarrying (e.g. excavators, wheeled loading shovels, aggregate crushing equipment), and forestry (e.g. timber harvesters, feller bunchers). Many working machines have a primary function of moving material using either a lifting arm (e.g. a pivoting boom) or a working arm (e.g. an excavator arm) and may be referred to as material handling machines.

[0007] Telehandlers are generally well known and comprise a vehicle with a pivoting telescopically extending working arm which allows items to be transported between different locations at varying heights with relative ease and flexibility. Telehandlers are often utilised in agriculture, construction or logistics, amongst other sectors.

[0008] Conventionally, working machines of the type referred to above are generally powered by diesel internal combustion engines. However, there is a general need to reduce vehicle emissions in the face of global warming leading to working machine or material handling machine OEMs considering alternative prime movers. Proposed alternatives include battery, hydrogen fuel cells, hydrogen internal combustion engines and various hybrid options, etc.

[0009] The present invention seeks to provide a storage solution for a gaseous fuel for a material handling machine comprising a gas engine or dual fuel engine.

[0010] SUMMARY

[0011] The present teachings provide a material handling machine according to the appended claims.

[0012] An aspect of the present teachings relate to a material handling machine. The material handling machine may comprise a body mounted on a ground engaging structure, and / or a lifting arm pivotally mounted to the body. The material handling machine may comprise P605359GB00 a prime mover, e.g. a gas engine, configured to provide motive power to the ground engaging structure. The material handling machine may comprise an operator cab mounted to the body adjacent the lifting arm. The material handling machine may comprise at least one storage tank for supplying a gaseous fuel to the prime mover, for example the gas engine.

[0013] Advantageously, providing a material handling machine with a gas engine and a storage tank reduces vehicle emissions in the face of global warming, thereby improving the sustainability of the material handling machine.

[0014] Optionally, the material handling machine comprises at least one storage tank located beneath, e.g. directly underneath, the operator cab.

[0015] Optionally, the at least one storage tank is arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

[0016] Optionally, the material handling machine comprises a single storage tank beneath the operator cab, said storage tank arranged substantially centrally with respect to the operator cab along a transverse axis of the material handling machine.

[0017] Optionally, the at least one storage tank is spaced apart from a lateral side of the working machine.

[0018] Optionally, the at least one storage tank is spaced apart from a lateral side of the working machine by a distance of at least 20cm.

[0019] Optionally, the material handling machine comprises a counterweight located rearward of the operator cab.

[0020] Optionally, the material handling machine comprises a gas storage tank arranged in front, e.g. directly in front, of the counterweight with respect to a central longitudinal axis of the material handling machine.

[0021] Optionally, the material handling machine comprises two counterweights on opposing side of the material handling machine, wherein a storage tank is arranged in front of each counterweight.

[0022] Optionally, a part of the lifting is located between the storage tanks.

[0023] Optionally, a shape of the at least one storage tank conforms to a shape of the counterweight.

[0024] Optionally, the or each storage tank is arranged to have a longitudinal axis that extends substantially vertically (i.e. upright) with respect to the longitudinal axis of the material handling machine. P605359GB00

[0025] Optionally, the operator cab is offset relative to a central longitudinal axis of the body on a first side of the body. Optionally, the material handling machine comprises a side pod mounted to the body on a second side of the body remote from the operator cab. Optionally, the at least one storage tank is located in the side pod.

[0026] Advantageously, providing the storage tank in a side pod may provide a convenient location for storing a gaseous fuel. The location of the storage tanks in the side pod provides natural protection.

[0027] Optionally, the at least one storage tank is arranged longitudinally in the side pod with respect to the central longitudinal axis of the body.

[0028] Optionally, the side pod comprises at least two storage tanks.

[0029] Optionally, the at least two storage tanks are vertically stacked. Optionally, an uppermost storage tank is offset relative to the other storage tanks in the side pod.

[0030] Advantageously, providing the at least one storage tanks vertically stacked helps to reduce the ground space taken up by the material handling machine. Providing more than one tank on the material handling machine increases the storage capability of gaseous fuel on the material handling machine.

[0031] Optionally, the body includes a chassis. Optionally, a length of the wheelbase of the chassis is in the range 2000mm to 4500mm, for example in the range 2750mm to 4000mm.

[0032] Advantageously, increasing the length of the wheelbase helps to provide space to mount the side pod thereto.

[0033] Optionally, the material handling machine comprises a front and rear. Optionally, the gas engine is located towards the rear of the material handling machine.

[0034] Advantageously, providing the gas engine towards the rear of the material handling machine helps to create space for the storage tanks, thereby improving the space efficiency of the material handling machine.

[0035] Optionally, the at least one storage tank is located towards a rear of the material handling machine.

[0036] Advantageously, providing the storage tank towards the rear of the material handling machine provides a convenient location for storing a gaseous fuel. The location of the storage tanks at the rear provides natural protection. The storage tank may be located fully within the footprint of the material handling machine, thereby improving space efficiency of the material handling machine.

[0037] Optionally, the at least one storage tank is located behind the lifting arm. P605359GB00

[0038] Optionally, the at least one storage tank is located on a central longitudinal axis of the lifting arm.

[0039] Advantageously, providing the storage tank on the central longitudinal axis of the lifting arm helps to improve the weight distribution of the material handling machine.

[0040] Optionally, the lifting arm is pivotably mounted at a first end to the body for pivoting movement about a first generally horizontal axis.

[0041] Optionally, the at least one storage tank is located rearward of the first generally horizontal axis.

[0042] Advantageously, providing the storage tank rearward of the first generally horizontal axis helps to prevent the storage tank from obstructing the lifting arm during an operation of the material handling machine.

[0043] Optionally, the body comprises a chassis. Optionally, the at least one storage tank is mounted to the chassis.

[0044] Advantageously, providing the storage tank mounted to the chassis may provide a convenient location for storing a gaseous fuel. The location of the storage tanks mounted to the chassis provides natural protection. The storage tank may be located fully within the footprint of the material handling machine, thereby improving space efficiency. Additionally, providing the storage tank mounted to the chassis helps to improve operator visibility.

[0045] Optionally, the chassis comprises a pair of parallel sidewalls configured to receive the lifting arm therebetween.

[0046] Optionally, the at least one storage tank is located between the parallel sidewalls of the chassis.

[0047] Optionally, the chassis extends rearwardly beyond the first horizontal axis. Optionally, the at least one storage tank is located between the rearwardly extended portions of the chassis.

[0048] Advantageously, the sidewalls of the chassis provide protection to the storage tank.

[0049] Optionally, the at least one storage tank is arranged substantially vertically with respect to a central longitudinal axis of the material handling machine.

[0050] Optionally, the at least one storage tank is arranged substantially horizontally with respect to a central longitudinal axis of the material handling machine.

[0051] Optionally, the at least one storage tank extends through the first and / or second sidewall of the chassis. P605359GB00

[0052] Advantageously, providing the at least one storage tank through the sidewalls provides a simplified mounting arrangement for mounting the at least one storage tank to the material handling machine.

[0053] Optionally, the at least one storage tank is located between the operator cab and a pivot axis of the lifting arm.

[0054] Optionally, the at least one storage tank is located below the pivot axis.

[0055] Optionally, the at least one storage tank comprises at least two storage tanks. Optionally, the at least two storage tanks are vertically stacked.

[0056] Advantageously, providing the at least one storage tanks vertically stacked helps to reduce the ground space taken up by the material handling machine. Providing more than one tank on the material handling machine increases the storage capability of gaseous fuel on the material handling machine.

[0057] Optionally, the material handling machine comprises a hydraulic system. Optionally, a hydraulic tank of the hydraulic system is located within a side pod of the material handling machine or below a rear axle of the material handling machine.

[0058] Optionally, the operator cab is offset relative to a central longitudinal axis of the body on a first side of the body. Optionally, the material handling machine comprises a side pod mounted to the body on a second side of the body remote from the operator cab. Optionally, the at least one storage tank is located in the side pod.

[0059] Optionally, the at least one storage tank is located below the operator cab.

[0060] Advantageously, providing the storage tank below the operator cab provides a convenient location for storing a gaseous fuel. The location of the storage tanks below the operator cab provides natural protection. The storage tank may be located fully within the footprint of the material handling machine, thereby improving space efficiency of the material handling machine.

[0061] Optionally, the at least one storage tank is arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

[0062] Optionally, the at least one storage tank comprises one or more storage tank located directly underneath the operator cab.

[0063] Advantageously, providing the storage tank directly underneath the operator cab side may help to improve weight distribution of the material handling machine.

[0064] Optionally, the at least one storage tank comprises a storage tanks located substantially centrally with respect to a central longitudinal axis of the material handling machine. P605359GB00

[0065] Optionally, the storage tank located substantially centrally is adjacent the one or more storage tank located directly underneath the operator cab.

[0066] Optionally, the material handling machine further comprises a drive arrangement. Optionally, the drive arrangement comprises a portal axle, a wheel motor or a hydrostatic drive arrangement.

[0067] Optionally, the material handling machine further comprises a counterweight located rearward of the operator cab. Optionally, the at least one storage tank is located above the counterweight.

[0068] Advantageously, providing the storage tank above the counterweight provides a convenient location for storing a gaseous fuel. The storage tank may be located fully within the footprint of the material handling machine, thereby improving space efficiency of the material handling machine.

[0069] Optionally, the at least one storage tank is arranged longitudinally with respect to a longitudinal axis of the material handling machine.

[0070] Optionally, the at least one storage tank is arranged substantially upright.

[0071] Optionally, the material handling machine comprises a lifting arm side and an operator cab side. Optionally, the at least one storage tank comprises a first storage tank located on the operator cab side rearward of the operator cab.

[0072] Optionally, the at least one storage tank comprises a second storage tank located on the lifting arm side.

[0073] Advantageously, providing a second storage tank helps to increase the storage capability of gaseous fuel on the material handling machine.

[0074] Optionally, the lifting arm is located between the first and second storage tanks.

[0075] Advantageously, providing the storage tanks on either side of the lifting arm may help to improve the weight distribution of the material handling machine, and increases the storage capability of gaseous fuel on the material handling machine.

[0076] Optionally, the body comprises a chassis. Optionally, the first and second storage tanks are mounted to the chassis.

[0077] Advantageously, mounting the first and second storage tanks to the chassis helps to reduce the need for additional mounting components or locations, thereby improving space efficiency of the material handling machine.

[0078] Optionally, the at least one storage tank is mounted to the operator cab.

[0079] Advantageously, providing the storage tank mounted to the operator cab provides a convenient location for storing a gaseous fuel. The storage tank may be located fully within P605359GB00 the footprint of the material handling machine, thereby improving space efficiency of the material handling machine.

[0080] Optionally, the operator cab comprises a cab roof. Optionally, the at least one storage tank is mounted to the cab roof.

[0081] Advantageously, providing the at least one storage tank on the roof helps to improve visibility.

[0082] Optionally, the at least one storage tank is arranged longitudinally with respect to a longitudinal axis of the material handling machine.

[0083] Optionally, the at least one storage tank is mounted to the lifting arm.

[0084] Advantageously, providing the storage tank mounted to the lifting arm provides a convenient location for storing a gaseous fuel. The storage tank may be located fully within the footprint of the material handling machine, thereby improving space efficiency of the material handling machine.

[0085] Optionally, the at least one storage tank is mounted to a first end of the lifting arm. Optionally, the first end is remote from the body when the lifting arm is in a working position.

[0086] Optionally, the material handling machine comprises a stabiliser arrangement. Optionally, the at least one storage tank is located within or adjacent the stabiliser arrangement.

[0087] Optionally, the material handling machine further comprises at least one storage tank located beneath the operator cab.

[0088] Advantageously, providing the storage tank below the operator cab may provide a convenient location for storing a gaseous fuel. The location of the storage tanks may be fully underneath the operators cab thereby providing natural protection. The storage tank may be located fully within the footprint of the material handling machine.

[0089] Optionally, the body comprises a front, a rear, a lifting arm side and an operator cab side. Optionally, the first end of the storage tank is provided adjacent the operator cab side.

[0090] Optionally, the at least one storage tank comprises a plurality of storage tanks distributed side-by-side.

[0091] Optionally, the body comprises a chassis. Optionally, the at least one storage tank is mounted to the chassis.

[0092] Optionally, the at least one storage tank is arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

[0093] Optionally, the at least one storage tank is located centrally with respect to the central longitudinal axis of the material handling machine. P605359GB00

[0094] Optionally, the at least one storage tank has a capacity of up to 15kg.

[0095] Optionally, the at least one storage tank is located towards a rear of the material handling machine.

[0096] Optionally, the at least one storage tank is located within the body, optionally within a counterweight of the body.

[0097] Optionally, the ground engaging structure comprises a pair of front wheels and a pair of rear wheels. Optionally, the at least one storage tanks comprises a plurality of storage tanks located at the rear of the material handling machine. Optionally, the plurality of storage tanks are located above and / or rearward of the rear wheels.

[0098] Optionally, the ground engaging structure comprises a pair of front wheels and a pair of rear wheels. Optionally, the at least one storage tanks comprises a plurality of storage tanks located at the rear of the material handling machine. Optionally, the plurality of storage tanks surround the rear wheels.

[0099] Optionally, the plurality of storage tanks are arranged in a cluster surrounding the rear wheels, optionally the cluster is a substantially C-shaped cluster when viewed from a left or right side of the material handling machine.

[0100] Optionally, the cluster of storage tanks form a recessed region. Optionally, the rear wheels are located in the recessed region of the cluster of storage tanks.

[0101] Optionally, the at least one storage tank comprises a plurality of storage tanks each having a longitudinal axis extending transversely to a longitudinal axis of the material handling machine.

[0102] Optionally, the plurality of storage tanks each define an elongate length. Optionally, the elongate length occupies a majority of a width of the material handling machine.

[0103] Optionally, the ground engaging structure comprises a pair of front wheels and a pair of rear wheels, and the elongate length is equal to or greater than a distance in a transverse direction between the rear wheels.

[0104] Optionally, the at least one storage tank comprises at least three storage tanks, optionally at least four storage tanks, optionally at least five storage tanks, for example at least six storage tanks.

[0105] Optionally, the body comprises a chassis. Optionally, a rear portion of the chassis is pivotable with respect to a fixed portion of the chassis.

[0106] Optionally, the ground engaging structure comprises a pair of front wheels mounted to a front axle and a pair of rear wheels mounted to a rear axle. Optionally, the rear axle is mounted to the rear portion of the chassis. Optionally, the front axle is mounted to the P605359GB00 fixed portion of the chassis. Optionally, the lifting arm is pivotally mounted to the fixed portion of the chassis.

[0107] Optionally, the at least one storage tank is mounted to the rear portion of the chassis.

[0108] Optionally, the ground engaging structure comprises a pair of front wheels and a pair of rear wheels. Optionally, the at least one storage tank comprises a plurality of storage tanks located at the rear of the material handling machine above the rear wheels.

[0109] Optionally, the plurality of storage tanks each extend longitudinally beyond the rear wheels in a rearward direction.

[0110] Optionally, the plurality of storage tanks are each arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

[0111] Optionally, the plurality of storage tanks are located behind the operator cab. Optionally, the plurality of storage tanks conform to a shape of a rear wall of the operator cab.

[0112] Optionally, the plurality of storage tanks comprise a first row of storage tanks and a second row of storage tanks stacked on top of the first row of storage tanks.

[0113] Optionally, each of the plurality of storage tanks comprises a first end and an opposing second end. Optionally, the first end is located behind the operator cab and the second end is located rearward of the first end. Optionally, the first and second ends of the storage tank or tanks in the first row are located in front of the respective first and second ends of the storage tank or tanks in the second row in the longitudinal direction.

[0114] Optionally, the body comprises a chassis. Optionally, the at least one storage tank is mounted to the chassis.

[0115] Optionally, the chassis comprises a storage tank housing configured to house the at least one storage tank.

[0116] Optionally, the storage tank housing comprises first and second parallel sidewalls. Optionally, the first and second sidewalls are configured to house the at least one storage tank therebetween.

[0117] Optionally, the operator cab is offset relative to a central longitudinal axis of the body. Optionally, the storage tank housing is located on the cab side of the body.

[0118] Optionally, the chassis comprises first and second parallel sidewalls configured to receive the lifting arm therebetween. Optionally, one of the first or second sidewalls partially defines the storage tank housing.

[0119] Optionally, the at least one storage tank is mounted to the chassis longitudinally with respect to the central longitudinal axis of the body. P605359GB00

[0120] Optionally, the at least one storage tank defines a maximum length. Optionally, the maximum length greater than or equal to a length of the wheelbase.

[0121] Optionally, the at least one storage tanks comprises at least one first storage tank and at least one second storage tank. Optionally, the at least one first storage tank is located longitudinally adjacent the at least one second storage tank.

[0122] Optionally, the material handling machine is a telehandler.

[0123] BRIEF DESCRIPTION OF DRAWINGS

[0124] Embodiments will now be described by way of example only with reference to the accompanying figures, in which:

[0125] Figures 1A to IE show a material handling machine according to the present disclosure, and illustrate a front perspective view of the lifting arm side (Fig. 1A), a rear perspective view of the lifting arm side (Fig. IB), cab side sideview (Fig. 1C), a front perspective view of the cab side (Fig. ID) and a rear perspective view of the cab side (Fig IE);

[0126] Figure 2 shows a plurality of storage tanks located beneath an operator cab according to an embodiment of the present disclosure;

[0127] Figure 3A shows storage tanks located in a side pod of the material handling machine of Figures 1A to IE;

[0128] Figures 3B to 3E show alternative embodiments of material handling machines with storage tanks located in a side pod;

[0129] Figure 4 shows a storage tank located towards a rear of the material handling machine of Figures 1A to IE;

[0130] Figures 5A and 5B shows an alternative arrangement of storage tanks located towards a rear of the material handling machine of Figures 1A to IE;

[0131] Figures 6A and 6B show storage tanks located below an operator cab of the material handling machine of Figures 1A to IE;

[0132] Figure 7 shows an alternative arrangement of a storage tank located below an operator cab of the material handling machine of Figures 1A to IE;

[0133] Figure 8 shows a storage tank located above a counterweight of the material handling machine of Figures 1A to IE;

[0134] Figures 9A and 9B show an alternative arrangement of storage tanks located above a counterweight of the material handling machine of Figures 1A to IE;

[0135] Figure 10 shows storage tanks mounted to an operator cab of the material handling machine of Figures 1A to IE; P605359GB00

[0136] Figures 11A to 12 show an alternative arrangement of storage tanks located at a rear of a material handling machine;

[0137] Figure 13 shows an alternative arrangement of storage tanks mounted to a chassis of the material handling machine of Figures 1A to IE; and

[0138] Figure 14 shows an alternative arrangement of storage tanks mounted to a chassis of the material handling machine of Figures 1A to IE.

[0139] DETAILED DESCRIPTION

[0140] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of various embodiments and the inventive concept. However, those skilled in the art will understand that: the present invention may be practiced without these specific details or with known equivalents of these specific details; that the present invention is not limited to the described embodiments; and, that the present invention may be practiced in a variety of alternative embodiments. It will also be appreciated that well known methods, procedures, components, and systems may have not been described in detail.

[0141] References to vertical and horizontal in the present disclosure should be understood to be in relation to the machine when stood on horizontal ground in a non-working condition. The term axial is generally used in relation to the longitudinal axis of the machine. The term width is generally used in relation to the longitudinal length, that is, transverse to the length.

[0142] With reference to Figures 1A to IE there is shown a working machine 10. The working machine 10 of the described embodiment is a material handling machine 10 in the form of a telehandler. However, it will be appreciated that the present disclosure may be applicable to other working machines which have a prime mover operable using a gaseous fuel.

[0143] The material handling machine 10 has a body 12, an operator cab 13 mounted to the body, and a lifting arm 14 pivotably mounted at a first end to the body 12 for pivoting movement about a first generally horizontal axis A (i.e. a pivot axis A). The material handling machine 10 includes a front and a rear with respect to a principal direction of travel. The machine includes an engine housing 15, in which a prime mover 15' (shown schematically in Figure IB only) is located. The body 12 is located on a ground engaging structure 17 which is in the form of axle mounted front 17F, 19F and rear wheels 17R, 19R. The material handling machine 10 is generally elongate having a principal longitudinal axis 11. The operator cab 13 defines the principal forward facing direction of travel of the material handling machine 10. P605359GB00

[0144] The material handling machine 10 includes the prime mover 15' in the form of a gas engine which is configured to run on a gaseous fuel. The prime mover 15' may be configured to provide motive power to the ground engaging structure and / or at least one hydraulic pump. The hydraulic pump may be used to drive hydraulic actuators required for the operation of the lifting arm or some other hydraulic service.

[0145] The gaseous fuel may be any suitable fuel such as compressed natural gas, hydrogen, landfill gas or biomass, for example, all of which are known in the art. It shall be appreciated that the gaseous fuel may be combined with any suitable combustible mixture. The gas engine may be an internal combustion engine. In preferred embodiments, the engine will be either a port fuel injected or direct injected hydrogen internal combustion engine, as known in the art. In other embodiments, the power train of the working vehicle may include a hydrogen fuel cell or some other form of gas powered energy conversion device. The prime mover may be dual fuel in some embodiments, and the material handling machine 10 may be a hybrid machine providing motive power from electrical and gaseous fuel energy sources. The gas engine 15' may be powered exclusively by hydrogen.

[0146] The material handling machine 10 may include a battery (not shown). The battery provides electrical power for powering various electrical functions on the material handling machine as well known in the art. For example, the battery may provide power to a starter motor of the machine or one or more ECUs or other electrical equipment. The battery may be located on the machine 10 in an area which is removed from the storage tanks 18a-z4 and gas engine. The battery may be located within a housing which is provided towards the front of, rear of, upstream of or downstream of and external to the lifting arm housing so as to be suitably removed from fuel lines and storage assembly. The battery may be located in a forward housing of the chassis between conventional stabiliser legs 76 which may be deployed to increase the machine stability during certain lifting operations.

[0147] The body 12 is carried by the ground engaging structure 17F, 19F, 17R, 19R comprising propulsive means which are driven by a powertrain. The powertrain includes the prime mover 15' and a drivetrain. In this example the prime mover is an internal combustion engine and the drivetrain includes a powershift gearbox as known in the art, but other prime movers and drivetrain types such as hydrostatic transmission and combinations thereof may be possible.

[0148] The body 12 and ground engaging structure 17F, 19F, 17R, 19R are provided in a fixed relation such that there is no relative movement therebetween in normal use. That is, the body 12 is not configured to rotate about a vertical axis, i.e. slew, in relation to the ground engaging structure 17F, 19F, 17R, 19R. Further, the body 12 includes a rigid or fixed frame which does not articulate as a wheeled loading shovel or other machines might. P605359GB00

[0149] The body 12 may include a chassis 30 which provides the main structural support for the material handling machine 10. The chassis 30 may provide structural support for the ground engaging structure 17F, 19F, 17R, 19R, the prime mover 15', the drivetrain, the operator cab 13, the lifting arm 14 and associated actuators, and any ancillary equipment, components, systems or body work as may be required for the machine to function. The chassis 30 may include a lifting arm housing in which the lifting arm is partially housed when in a non-working position and / or provides a pivoting mount for the lifting arm 14. Parallel sidewalls 30-1, 30-2 of the chassis 30 define the lifting arm housing. Put another way, the lifting arm 14 is located between the sidewalls 30-1, 30-2 of the chassis 30.

[0150] The body 12 may include a counterweight 84 to counterbalance the lifting arm 14. The counterweight 84 is positioned at an aft end of the operator structure 13, for example opposite the lifting arm 14 to optimise the counterbalance effect.

[0151] The ground engaging structure 18 of the example shown in the figures includes a front pair of wheels 17F, 19F and a rear pair of wheels 17R, 19R as is well known in the art. The wheels 17F, 19F, 17R, 19R may be configured to provide two wheel or four wheel steering as is well known in the art. As such, either or both of the front 17F, 19F and rear wheels 17R, 19R may be configured to turn relative to the body 12 under the influence of a steering device provided within the operator cab 13.

[0152] Either or both of the front 17F, 19F and rear 17R, 19R wheels may be driveably attached to corresponding axles which form part of the transmission / drivetrain of the material handling machine 10. One or both of the axles may be coupled to the prime mover 15' or drive train which is configured to drive movement of one or both pairs of wheels 17F, 19F, 17R, 19R. Thus, the wheels 17F, 19F, 17R, 19R may contact a ground surface and rotation of the wheels 17F, 19F, 17R, 19R may cause movement of the material handling machine 10 with respect to the ground surface. In other embodiments the ground engaging propulsion structure may include a pair of tracks. In an embodiment, at least one of the first and second axles is coupled to the body 12 by a pivot joint (not shown) located at substantially the centre of the axle such that the axle can rock about a longitudinal axis of the material handling machine 10 thereby improving stability when moving across uneven ground.

[0153] The operator cab 13 is mounted to the chassis 30 of the main body 12 and includes an operator seat and suitable controls for operating the machine 10. Thus, there may be one or more: steering device, such as a steering wheel 13-7, lever or joystick for example; input devices for operating the lifting arm 14, such as a lever or joystick 13-8 for example, speed control devices for controlling the movement of the machine over ground, such as one or more foot controls (e.g. accelerator, brake), lever or joystick; a throttle control; one or more output devices for providing the operator with information pertaining to the P605359GB00 operating state of the machine which may be visual (e.g. a display screen, warning lights) or audible (e.g. buzzer, speaker or other alarm); and, one or more input devices for configuring or operating various aspects of the machine (e.g. switches, levers, touch screen display, joysticks, touch buttons).

[0154] The operator cab 13 may be conventional and be constructed from a glazed frame 13 including a number of structural members having panels or glass extending therebetween. The operator cab 13 extends from one side of the machine 10, the near-side, towards the other lifting arm 14. As can best be seen in Figure ID, access to the operator cab 13 may be provided by an opening in a cab sidewall 13-2. In the embodiment shown, there is shown a door 13-3 pivotable about a plurality of hinges 13-4 provided on an aft cab pillar thereof and a handle 13-5 provided towards the front for latching and optionally locking the door 13-3 in a closed position. It will be appreciated that the presence and arrangement of the door 13-3 may differ variously in embodiments of the present disclosure. The operator cab 13 includes a cab roof 13-6 for protecting the operator from falling debris etc.

[0155] Immediately and directly below the cab entrance there is provided a plurality of cab access steps 40-1, 40-2, 40-3 which are configured to receive an operator's feet when entering or exiting the cab 13.

[0156] The lifting arm 14 is configured to carry a load handling implement (not shown) at a second end and may include a tool carrier 16 which is configured to attach a working implement to the machine 10. The tool carrier 16 is configured to pivot relative to the lifting arm 14 about a second generally horizontal axis so that a load may be kept in a constant horizontal or other desired orientation as the lifting arm 14 pivots up and down, as well known in the art.

[0157] The lifting arm 14 may be provided by an elongate box section having a length which extends fore-aft on the machine 10, a transverse width, and a vertical depth. The lifting arm 14 may be a telescopic boom having a plurality of nested sections which are configured to expand telescopically to adjust the length thereof upon demand. Thus, there is shown a first section connected to a pivoting mount 32 and a second section which is telescopically mounted within the first section. The second section of the lifting arm 14 is longitudinally moveable with respect to the first section such that the lifting arm 14 can be extended and retracted on demand from the operator cab 13 controls. The lifting arm 14 shown in the Figures has four telescopic sections but more or fewer may be used in other embodiments. It will be appreciated that the lifting arm may not be telescopic in some embodiments. P605359GB00

[0158] The lifting arm 14 extends from the pivot mount 32 which is located generally above the rear wheel 19R and aft of the cab 13 to the front of the machine 10. The tool carrier 16 is the foremost part of the material handling machine 10 when no lifting implement is attached. The first section is a straight section which is inclined slightly downwards from the pivot mount 32 for transportation and when not in use, and extends fore of the cab 13 to terminate above the front wheel 19F. The second section extends colinearly from within the first section with a drop section which is angled downwards so as to put the tool carrier 16 proximate the ground. Telescopic movement of the second section with respect to the first section of the lifting arm 14 may be achieved by use of an extension actuator. The extension actuator may be any known in the art, such as a double acting hydraulic linear actuator. In some embodiments, extension may be achieved by use of an electric linear actuator, a telescopic extension ram, multiple extension rams, and / or a chain and pulley system.

[0159] In embodiments where more than one storage tank 18a-z4 is provided, the storage tanks 18a-z4 may include shutoff valves or isolation valves. The valves enable individual tanks to be shutoff or isolated from one another, for example sequential shutoff from one another. This helps to limit a pressure drop of each storage tank 18a-z4 during discharge of gaseous fuel from the storage tank 18a-z4, thereby helping to prevent temperature drops and chilling of the storage tanks 18a-z4.

[0160] As gaseous fuel is consumed from the storage tanks 18a-z4, an internal temperature of the storage tanks 18a-z4 decreases (i.e. gets cooler). When the material handling machine 10 is refuelled, heat is added back into the storage tanks 18a-z4. Including the shutoff valves or isolation valves means that gaseous fuel may be consumed from a single storage tank 18a-z4, rather than treating the storage tanks 18a-z4 as a homogenous unit. This means that only the storage tank 18a-z4 from which gaseous fuel is consumed is chilled as gaseous fuel is consumed therefrom. It is then possible to switch to the next storage tank 18a-z4 to consume gaseous fuel therefrom, which will start from a warmer internal temperature, or balance gaseous fuel between the storage tanks 18a-z4. The balancing of gaseous fuel between the storage tanks 18a-z4 equalises the pressure in the storage tanks 18a-z4, thereby adding heat back into the storage tanks 18a-z4.

[0161] It shall be appreciated that the shutoff / isolation of the storage tanks 18a-z4 may be implanted as control logic. A controller of the material handling machine 10 may therefore be used to implement the control logic. It shall be appreciated that in some embodiments, the shutoff and / or isolation valves may be omitted.

[0162] As illustrated in Figures 2 to 13, the material handling machine 10 may have one or more storage tanks in which the gaseous fuel may be received and stored for use by the gas engine. The location of the storage tanks may be anywhere suitable in the machine 10, as P605359GB00 will be described in more detail below. The storage tanks are elongate. The storage tanks have a cylindrical central body with first and second hemispherical ends. The storage tanks may be substantially torpedo shaped.

[0163] In some embodiments, the storage tanks have a longitudinal axis lying horizontal and transverse to the longitudinal axis 11 of the machine 10 and operator cab 13. In other words, the tanks lie width-wise across the machine 10 and perpendicular to the length of the machine 10. In some embodiments, the storage tanks have a longitudinal axis lying parallel to the longitudinal axis 11 of the material handling machine 10 and the operator cab 13. In other words, the storage tanks lie length-wise along the material handling machine 10 and parallel to the length of the material handling machine 10. In some embodiments, the storage tanks have a longitudinal axis extending vertically and transverse to the longitudinal axis 11 of the material handling machine 10 and operator cab 13. In other words, the storage tanks lie height-wise along the material handling machine 10 and perpendicular to the length of the material handling machine 10. In some embodiments, a combination of the above orientations may be used, and / or the storage tanks may be arranged diagonally.

[0164] Referring to Figure 2, an embodiment of the location of the at least one storage tank 18a- c is illustrated. The storage tanks 18a-c are provided under the operator cab 13. The storage tanks 18a-c have a longitudinal axis 20 lying horizontal and transverse to the longitudinal axis 11 of the machine 10 and operator cab 13. In other words, the tanks 18a-c lie width-wise across the machine 10 and perpendicular to the length of the machine 10. In the illustrated embodiments, there are three storage tanks 18a-c, but there may be more or fewer than this in other embodiments.

[0165] The storage tanks 18a-c are provided in a housing 22 (which may be referred to as an enclosure) beneath the operator cab 13. The housing 22 may include a bulkhead and at least one external sidewall 26 which extends downwardly from the bulkhead. The bulkhead may be configured to carry the weight of the storage tanks 18a-c and provide a sealed enclosure in combination with the sidewall(s) 26 such that escaped gaseous fuel may be vented to air at a safe location. As such, the bulkhead is connected to the sidewall(s) 26 to provide a substantially sealed space save for one or more vents. In some embodiments, the bulkhead maybe provided integrally as part of the cab 13. Hence, the floor pan of the cab 13 may form part of a housing of the storage tanks 18a-c.

[0166] The connection between the sidewall(s) 26 and bulkhead may be any suitable connection that provides a suitable seal. Thus, the bulkhead and a portion of the sidewall(s) 26 may be a single component formed or joined to prevent the escape of gas therebetween. Hence, the bulkhead may be joined via welding or bolted with an intermediate seal member. The P605359GB00 seal member may form a complete seal. In some embodiment, the seal member may form a partial seal, for example when ventilation is provided to direct gas to a safe location.

[0167] A seal member is provided between the two such that the bulkhead and sidewalls 26 may be separately installed. The seal member may be a resiliently deformable compressible or flexible seal member provided around a peripheral edge of the bulkhead and positioned such that it is compressed by the sidewall(s) 26 as when the two are assembled together. It will be appreciated that the use of a resiliently deformable compressible or flexible seal member between the bulkhead and the sidewall(s) 26 may be advantageous for ease of assembly and to allow differential movement between the two components in service. As such, the bulkhead and tanks 18a-18c and associated pipework may be provided as a subassembly and installed prior to the housing sidewall(s) 26 being installed.

[0168] The seal member may include a bubble seal which are well known in the art. However, other forms of compressible or flexible strip seals or members will also be possible. By way of example, overlapped plates and / or rubber interfaces may also be used. It will be appreciated that the specific geometry and material of the seal member will be application specific as known in the art and not described further here.

[0169] The bulkhead may include a plate-like member having one or more elevated portions to provide a gas funnel for guiding and / or venting escaped gas towards an opening thereby allowing it to vent to air at a chosen safe location. The elevated portion of the embodiment includes a single elevation at a central portion of the bulkhead. Hence, there is provide a bulkhead having a central elevated portion provided at a first height with adjacent side regions provided at a second, lower height. The elevated portion may extend longitudinally along the central axis of the central storage tank 18b and transversely across the tank width. The elevated portion may extend along the full length of the tank and across the central third of the width of the storage tanks 18a-c when viewed side on, as shown. Hence, the elevated portion extends in a common direction with the storage tanks and may have a size and geometry suitable for receiving a portion of one of the storage tanks 18a-c. As described further below, the elevated portion may be received between cantilever members (which may be referred to as arms) which support the cab 13.

[0170] In the described embodiment, the storage tanks 18a-c are provided in a laterally distributed array so as to be located side-by-side and extending in a common transverse direction relative to the length of the machine 10. In some embodiments, the material handling machine 10 may include a tank heating system (not shown) for heating the storage tanks 18a-c, which may help to increase machine run time. It will be understood that a tank heating system may be incorporated into any of the embodiments described herein. P605359GB00

[0171] One of the storage tanks, the central storage tank 18b in the described embodiment, is elevated with respect to the other tanks 18a, 18c such that its centre line is placed vertically higher. This allows the side tanks 18a, 18c to be moved laterally inwards whilst maintaining a suitable mutual separation between the tanks 18a-c. As such, the tanks 18a-c can occupy a smaller footprint for a given size of tank 18a-c, thereby maximising the storage beneath the cab 13 whilst maintaining ground clearance. In other embodiments, the storage tanks 18a-c may be longitudinally aligned along the fore-aft direction. An advantage of a longitudinal alignment with the direction of travel is that it reduces the stress on circumferential retention straps during acceleration and braking of the vehicle. Additionally, longitudinal alignment with the direction of travel may reduce the likelihood of the storage tanks 18a-c slipping from the desired position, in use.

[0172] In the material handling machine 10, the storage tanks 18a-c may be advantageously located fully beneath a floor plate 13-1 of the operator cab 13 and between the front 17F, 19F and rear 17R, 19R wheels. As such, the storage tanks 18a-18c may be provided with a degree of overhead and side-impact protection.

[0173] As described above, immediately and directly below the cab entrance there is provided a plurality of cab access steps 40-1, 40-2, 40-3 which are configured to receive an operator's feet when entering or exiting the cab 13. In prior art machines, the steps 40-1, 40-2, 40- 3 are typically a vertically inline array including two or three treads depending on the size of the machine or a single step. The steps are typically provided flush with the external wall of the cab 13 and extend thereunder. An issue with this type of prior art step arrangement for a machine having storage tanks below the cab 13, is that the steps necessarily reduce the volume in which the storage tanks 18a-c could be stored.

[0174] To negate this, the present disclosure provides a material handling machine 10 comprising: a body 12 mounted on a ground engaging structure 17; a telescopic lifting arm 14 pivotally mounted to the body 12; an operator cab 13 mounted to the body 12 adjacent the telescopic arm 14; and a plurality of steps 40-1, 40-2, 40-3 located beneath an entrance to the operator cab 13 to facilitate access; and, a plurality of storage tanks 18a-c for receiving a gaseous fuel, wherein the storage tanks 18a-c are located beneath the operator cab 13 and laterally distributed so as to sit side-by-side beneath the floor of the operator cab 13 behind the plurality of steps 18a-c.

[0175] The steps 40-1, 40-2, 40-3 may be positioned around one or more of the storage tanks 18a-c so that a portion of one of the storage tanks 18a-c, such as an end portion and / or a tank valve 42 and / or associated pipework is located between two of the steps 40-1, 40- 2, 40-3, either horizontally or vertically when viewed along the length of the tanks 18a-c. The portion of the tanks 18a-c may project between two of the storage tanks 18a-c so as to extend axially beyond the rear-most portion of the steps 40-1, 40-2, 40-3. In other P605359GB00 words, a portion of one or more of the tanks 18a-c may project beyond a vertical plane defined by a rear-most face of a step tread plate 40-5 or a rear wall of a step pocket. In some embodiments, the separation of the steps 40-1, 40-2, 40-3 may simply provide a required separation between the housing / steps and the portion of the tanks 18a-c and the portion of the tanks 18a-c may not extend forward of the rear plane of the steps 40-1, 40- 2, 40-3. The steps 40-1, 40-2, 40-3 may radially overlap two or more of the tanks 18a-c when viewed head on.

[0176] Arranging the steps 40-1, 40-2, 40-3 about the tanks 18a-c so that the steps 40-1, 40-2, 40-3 extend axially between the tanks 18a-c (and vice versa) allows the storage area for the tanks 18a-c under the operator cab 13 to be maximised.

[0177] In order to maximise the size of the storage tanks 18a-c, the present disclosure provides laterally separated steps 40-1, 40-2 at a common height. Thus, an upper step (which could be a lower step in some embodiments) may include a plurality of individual steps 40-1, 40-2 with a portion of a tank 18b located therebetween. In some embodiments, a portion of one of the tanks 18a-c may be additionally or alternatively located between steps provided at different heights. Thus, as described further below, a tank valve 42 or other portion of a tank may be located above a lower step 40-3 and between upper steps 40-1, 40-2.

[0178] Further, as previously described, the storage tanks 18a-c, and / or tank valves 42, may be provided at different heights such that a central tank valve is located above a lower step 40-3 and between two upper steps 40-1,40-2, and the upper steps 40-1, 40-2 are located above one or more side tank valves 40-a, 40-b. In the embodiment shown, the relative heights of the tank valves 42 when viewed left to right are low, high, low, and the relative heights of the steps 40 are high, low, high, thereby allowing the steps 40 and tanks 18a- c provided at a common lateral position be vertically separated allowing them to axially overlap.

[0179] As described above, one or more of the storage tanks 18a-c may be positioned higher than one or more of the other storage tanks 18a-c. In the embodiment shown, the higher position of the central tank 18b allows it to be located above the lower step 40-3 and flanked by the upper steps 40-1, 40-2 which in turn sit above the height of the lower side tanks meaning a single lower step 40-3 and two upper steps 40-1, 40-2 is particularly advantageous. The centre height of the side tanks 18a, 18c may be below the upper steps 40-1, 40-2 allowing the upper steps to be placed further out and / or be wider. Hence, in some embodiments (not shown), the upper steps 40-1, 40-2 may extend over the tank valves 42 or other portion of the side tanks 18a, 18c and reside on either side of and level with a tank valve 42 or portion of the central step 18b. P605359GB00

[0180] In addition to providing advantageous packaging, a single lower step 40-3 and two upper steps 40-1, 40-2 works well as it allows a user to place either foot on the lower step 40-3 whilst being able to naturally place the other foot, be it the left or right, in one of the right or left step pockets 40-1, 40-2 without having to shift body positions. That is, the arrangement of the steps 40 lends itself equally to people with a dominant left foot or a dominant right foot. Additionally, the step arrangement helps to encourage safe practice in maintaining three points of contact between the user and the material handling machine 10.

[0181] The plurality of storage tanks 18a-c of the present disclosure may be arranged in an array. The array may include a lateral distribution of the storage tanks 18a-c so that they reside side-by-side beneath the cab 13. As will be appreciated, the storage tanks 18a-c will require one or more gas lines 54 for filling and discharging the gaseous fuel. Further, the gas storage arrangement requires one or more valves 42 to control the flow of gas into and out of the tanks 18a-c. The gas lines 54 may be referred to as conduits or pipework and may generally comprise an external cylindrical wall which defines a passageway to provide fluid communication for pressurised gas between the various parts of the storage tanks 18a-c and other parts of the material handling machine 10.

[0182] In some embodiments of the present disclosure, the each of the tanks 18a-c are provided with an on-tank valve 42, illustrated in Figure 2. The on-tank valve 42, which may be referred to as a tank valve 42, may be fitted to the first end of the tanks 18a-c to inboard of the housing 22. As such, the present disclosure provides an off-highway machine comprising: a body 12 mounted on a ground engaging structure 17; an array of storage tanks 18a-c for receiving a gaseous fuel within the body 12, each storage tank 18a-c comprising a cylinder having a central axis 44, a first end 48-1 and a second end 48-2, and oriented such that first end of each storage tank 18a-c is provided on the same side of the array, wherein each first end 48-1 of the storage tanks 18a-c is provided with a tank valve 42 for controlling the flow of gaseous fuel into and out of the respective storage tank 18a-c.

[0183] Thus, there is provided an array of storage tanks 18a-c, each having corresponding tank valve 42 arranged adjacent one another, typically on an outboard end of the tanks to provide convenient access for maintenance and the like. Providing the tank valves 42 on an outboard side and adjacent to one another is advantageous for providing easier installation and maintenance and also for maximising storage. However, mounting the tanks with the valves on an inboard side may be preferable in other embodiments for providing improved impact protection.

[0184] The tank valves 42 of the respective storage tanks 18a-c may be connected in series flow communication such that a first of the plurality storage tanks 18a comprises an outlet in P605359GB00 flow communication with the inlet of the tank valve 42 of the second tank 18b, and the second tank valve 42 may comprise an outlet which is in flow communication with an inlet of the tank valve 42 of the third tank 18c, and so one.

[0185] The first tank 18a in the series may include a filling inlet valve which is in flow communication with a filling nozzle inlet 50 such that the tanks 18a-c may be filled via the series connection. The final tank 18c in the flow series of tanks may be connected to an outlet regulator or other point of use.

[0186] In order to provide the connection between the tanks 18a-c, each of the valves 42 may comprise a plurality of ports. The plurality of ports may include a first port and a second port, each providing an inlet or an outlet attached to a respective inlet conduit or an outlet conduit for receiving and delivering gaseous fuel to and from the storage tank 18a-c respectively.

[0187] The first and second ports may be configurable such they can act as an inlet port for receiving a flow of gas from an upstream tank, or an outlet port for discharging the flow of gas to a downstream tank. In the present disclosure, the first and second ports may comprise a bidirectional flow passage therebetween such that gas can flow in either direction. Hence, if the first port is connected to an outlet from an upstream tank it will be configured as an inlet, and the second port will act as an outlet to deliver the gas to the downstream tank (or other end point).

[0188] A further advantage of providing a series connection of tanks in this way is that the common line pressure which connects all of the tanks facilitates the identification of faults in the individual tanks. That is, the pressure of the common line which series connects each of the tank valves can be measured, for example, at the outlet regulator, and this compared to each of the individual tank pressure measured, for example, by the tank valves. The discrepancy between the common line pressure and the individual tank pressure is too great, a sensor error can be inferred in a tank valve / sensor, and / or an inference can be made that there is leak occurring in the gaseous fuel system.

[0189] The physical location of the ports may be chosen in order to simplify the interconnection of the various gas lines 54. Hence, for example, each of the tank valves 42 may correspond to the other tank valves 42 of the plurality of tanks 18a-c so as to include a central body which attaches to the respective tank and ports which extend radially therefrom, normal to the tank axis. The angular position of the first and second ports may be the same for each valve 42 so that, when mounted in a common orientation, the first ports all point upwards, and the second ports all point downwards, for example.

[0190] As the ports are configurable, e.g. bi-directional, it is possible for the interconnecting gas lines 54 to be provided on the same side of the tank valves. Hence, a first interconnecting P605359GB00 gas line 54 which extends between the first tank 18a and the second tank 18b is provided on the bottom side of the first and second tank valves 42, and a second interconnecting gas line 54 which extends between the second and third tanks 18b, 18c may be provided on the upper side of the tank valves 42.

[0191] This arrangement in which the flow direction through the valves 42 interchanges between adjacent valves 42 allows the length of the interconnecting lines to be reduced and the routing to be simplified. Thus, the space required for the gas storage assembly may be reduced and the size of the tanks increased.

[0192] As noted, the first tank 18a in the flow series is connected to a filling nozzle inlet 50. The filling nozzle inlet 50 may be provided proximate to the first tank 18a such that the length of the gas line 54 which extends between the two can be kept to a minimum. The filling nozzle inlet 50 is provided towards the top of the housing 22 so as to make the filling easier for the operator, and also to allow the filling nozzle inlet 50 to be firmly attached to the cab support structure and / or bulkhead. The outlet regulator may be attached to the storage tank sub-assembly, e.g. to the bulkhead via a suitable bracket and / or fixing, proximate the third tank 18c. The outlet regulator may be sized and located so as to be behind the final tank 18c in a recess provided by the hemispherical end cap of the final tank 18c.

[0193] The filling nozzle inlet 50 may be configured to receive a corresponding nozzle of a refuelling device (not shown) as is well known in the art. In order to protect the filling nozzle from the elements and general environment, the filling nozzle inlet 50 may be provided behind a door provided in an external wall of the storage tank housing. The door may be hinged as is well known in the art.

[0194] Each tank 18a-c may comprise a pressure relief valve 59, such as a thermal pressure relief valve which is configured to open when the internal temperature of the tank passes a preset temperature. Thermal pressure relief devices, TPRDs, are well known in the art. As shown, the pressure relief valve 59 may be provided within the tank valve 42 for convenience.

[0195] The pressure relief valves from each tank 18a-c may be connected to a tank vent line 60 which is extends to a tank vent outlet 62 which is located remotely from the storage tanks 18a-c. The connection between the plurality of tanks 18a-c and tank outlet may be achieved using a radial configuration in which a vent line 60 extends from each tank valve 42 to one or more connecting nodes. A common vent line 64 extends from one of the connecting nodes to the outlet.

[0196] It shall be appreciated that there may be provided vent lines 60 from the outlet regulator and each of the tank valves 42. The vent lines 60 are connected by two separate nodes P605359GB00 with the common vent line 60 extending from one of the nodes to the vent outlet 62 shown in Figure 2. As with the first and second ports, the pressure relief valve 59 and associated port is provided in the same location on each of the tank valve 42 to simplify the connections and minimise the routing of the different lines.

[0197] The pressure relief valves 59 are configured to open in the event of an increased pressure and / or temperate, for example, as a result of increased temperature from a fire. Once triggered, the pressurised content of the storage tanks 18a-c is rapidly discharged down the vent lines 60, 64 and out of the outlet 62. Further, it is likely that when the material handling machine 10 is off, if one pressure relief valves 59 opens then the other ones will open too (given they are subject to the same ambient conditions). Hence, the tank vent outlet 62 may be subject to a large discharge of gaseous flow in a short time window.

[0198] As such, the vent outlet 62 of the described embodiment may be provided above the body 12, optionally above the operator cab 13, optionally at the highest location on the machine 10 so that discharged gas can be vented to air unobstructed. The specific location of the outlet 62 will be application specific and may vary. The tank vent outlet 62 may be provided at an inboard portion of the machine and, in some embodiments, towards a central location. Providing the tank vent outlet 64 towards a central location of the machine 10 helps reduce the risk of ignition from ignition sources which are external to the machine 10. Where the material handling machine 10 comprises a working arm, e.g. a lifting or excavating arm, the tank vent outlet 62 may be located inboard of the arm. The vent outlet 62 may be located within a central location of the machine 10. The central location may be on or adjacent to the longitudinal centreline 11 of the machine 10. The central location may be within a region which is 30%, optionally, 25%, optionally 20% of the machine width from the longitudinal centreline 11. The central location may be between the first and second axle. The central location may between the fore-aft extremities of the operator cab. The central location may be within a region which is 30%, optionally, 25%, optionally 20% of the machine length from the transverse centreline.

[0199] In some embodiments, where an operator cab 13 is centrally located, the tank vent outlet 62 may be provided on an inboard side of the cab 13. The tank vent conduit may extend up a front or rear support member of the operator cab, for example a corner pillar which supports the roof 13-6.

[0200] Figure 2 shows an embodiment in which the vent line 60 from each of the tanks 18a-c join with the common vent line 64 at a node located between two of the storage tanks 18a, 18b. The common vent line 64 is extends inboard towards a rear lower corner of the operator cab 13 adjacent to the chassis inner wall. The common vent line 64 extends up the rear corner of the cab 13 to a top rear corner where the outlet 62 is located at or adjacent to the upper most surface of the cab roof 13-6. P605359GB00

[0201] The tank vent line 60 may extend from the plurality of storage tanks 18a-c to the body 12 and / or operator cab 13 and comprises a portion of flexible conduit 66 to allow differential movement of the plurality of storage tanks in relation to the body and / or operator cab 13. The flexible conduit 66 may extend from one or more of the valves 42 or nodes and may terminate to a rigid section of the flexible conduit 66. In the embodiment shown in Figure 2, the flexible conduit 66 extends up a rear side of the cab 13 and transitions into a rigid conduit at or just below the rear window and within a protective cover (see Figure IE) which forms part of the body 12. As such, the only conduit which is exposed is rigid, thereby providing a greater resilience to damage.

[0202] The conduits which go to make up the vent line 60, the common vent line 64, the flexible portions and rigid portions may be made from one or more of the group comprising: stainless steel, e.g. 316L, nylon, PTFE, polyamide, steel braid etc. In some embodiments, the flexible portions may comprise a laminated polymer hose comprising one or more braids.

[0203] The tank valves 42 may be multi-functional units including various ports, valves and sensors. The tank valves may each comprise one or more of the group comprising : a shutoff valve, a pressure transducer, a temperature sensor and a pressure relief valve, a first port and a second port.

[0204] Figures 3A to 13 show alternative embodiments of locations of the storage tanks 18a-z4. It shall be appreciated that the teachings defined above in relation to Figure 2, for example those relating to vents, seals, pipework, valves 42, gas lines 54, tanks 18a-z4, tanks sensors, pressure relief valves 59 and pressure relief devices, are applicable to the embodiments of Figures 3A to 12.

[0205] Figure 3A illustrates an alternative location of the storage tanks 18d-f. As described above, the operator cab 13 is offset relative to a central longitudinal axis 11 of the body 12 on a first side of the body 12 (i.e. the operator cab side). The material handling machine 10 includes a side pod 80 mounted to the body 12 on a second side of the body 12 remote from the operator cab 13 (i.e. the lifting arm side). The at least one storage tank 18d-f is located in the side pod 80.

[0206] All pipework, regulators, receptacles and shutoff valves (for example those described above) are mounted in the side pod 80. By way of example, these components may be mounted on a frame, for example an audio visual frame. As such, only one or two pressure connections are required on the gas line 54, which significantly reduces the likelihood of leaks. Furthermore, this arrangement enables full over-pressure testing offline before installation (when pressure is higher) and provides a level of protection to the pipework, regulators and receptacles, and minimises the need for leak detectors elsewhere on the P605359GB00 vehicle, for example because the storage tanks 18d-f are located away from the operator cab 13.

[0207] The at least one storage tank 18d-f is located in the side pod 80. The side pod 80 includes a base wall 80a, a top wall 80b and a continuous sidewall 80c extending therebetween. The side pod 80 includes a housing 82 for housing the storage tanks 18d-f. The housing 82 retains the storage tanks 18d-f in the correct position with respect to the side pod 80. The location of the at least one storage tank 18d-f in the side pod 80 helps to provide protection to the at least one storage tank 18d-f. Furthermore, the storage tanks 18d-f can be mounted in the side pod 80 a distance of 200mm from the edge of the body 12, which helps to reduce the need for expensive and time-consuming right-side impact testing to comply with industry standards. Providing the storage tanks 18d-f in the side pod 80 as a modular structure means that the side pod 80 can be retrofitted to a number of wheelbases.

[0208] In the embodiment of Figure 3A, three storage tanks 18d-f are provided. Each of the storage tanks 18d-f has a diameter in the range 200mm to 600mm, for example a diameter in the range 300mm to 500mm. It shall be appreciated that in alternative embodiments, any suitable number of storage tanks 18d-f may be provided of any suitable diameter, for example two storage tanks or four storage tanks. The total storage capacity of the storage tanks 18d-f in the side pod 80 may be greater than 5kg, for example greater than 9kg. Storage capacities within these ranges have been found to be suitable for intense operation of the material handling machine 10, and can be used to power a higher power gas engine 15' compared to storage tanks 18d-f with a lower storage capacity.

[0209] Each storage tank 18d-f is arranged longitudinally in the side pod 80 with respect to the central longitudinal axis 11 of the body 12. The storage tanks 18d-f extend in a common direction relative to the length of the material handling machine 10. Furthermore, as illustrated in Figure 3A, the storage tanks 18d-f are arranged at an acute angle with respect to the central longitudinal axis 11 of the body 12. It shall be appreciated that in alternative embodiments, the storage tanks 18d-f may be parallel to the longitudinal axis 11, orientated substantially vertically within the side pod 80, or arranged transversely with respect to the central longitudinal axis 11 of the body 12.

[0210] The storage tanks 18d-f are vertically stacked. As such, the storage tanks 18d-f can occupy a smaller footprint for a given size of the storage tanks 18d-f, thereby maximising the storage in the side pod 80. The storage tanks 18d-f occupy a majority of a volume of the side pod 80. In particular, the storage tanks 18d-f may occupy substantially an entirety of the side pod 80. The storage tanks 18d-f extend along a majority of a length of the side pod 80, for example substantially along an entirety of the length of the side pod 80. It shall be appreciated that the length of the side pod 80 extends parallel to the longitudinal P605359GB00 axis 11 of the material handling machine 10. The term "substantially" in this context is taken to mean that the storage tanks 18d-f occupy as much of the side pod 80 as is possible in practice. For example, clearances may need to be provided to account for vibration of the storage tanks 18d-f, meaning that the storage tanks 18d-f cannot occupy 100% of the side pod 80. The same definition of "substantially" applies to every embodiment of the Figures.

[0211] As illustrated in Figure 3A, an uppermost storage tank 18d is offset relative to the other of the storage tanks 18e, 19F in the side pod 80. The arrangement of the uppermost storage tank 18d conforms to the shape of the side pod 80, and improves operator visibility in a direction towards the front wheels 17F, 19F. The uppermost tank 18d is located closer to the rear of the material handling machine 10 than the other of the storage tanks 18e, 19F. A shape of the side pod 80 conforms to the shape of the storage tanks 18d-f (e.g. the shape of the offset uppermost storage tank 18a). As such, the sidewall 80c of the side pod 80 includes a protruded portion protruding rearwardly for providing space to house the offset uppermost tank 18d. It shall be appreciated that in alternative embodiments, the storage tanks 18d-f may be vertically aligned. Alternatively, the uppermost tank 18d may be located closer to the front of the material handling machine 10 than the other storage tanks 18e, 19F, or one of the other storage tanks 18e, 19F may be vertically offset.

[0212] It shall be appreciated that in some embodiments, the side pod 80 may be used in combination with the embodiment described above, wherein additional storage tanks 18a- c are located below the operator cab 13. In such embodiments, fuel lines (not shown) may be included which are connected to the additional storage tanks 18a-c below the operator cab 13. For example, the fuel lines may extend across the chassis 30 to alternative locations on the material handling machine 10. The fuel lines may be of substantially the same configuration to the fuel lines for connecting adjacent storage tanks 18a-c below the operator cab 13, described above. In some embodiments, flexible hoses may be used to improve flexibility and vibration performance.

[0213] The gas engine 15' in this embodiment may be located towards the rear of the material handling machine 10 (i.e. as opposed to in the engine housing 15 of Figures 1A to IE). Providing the gas engine 15' towards the rear of the material handling machine 10 helps to create space for the side pod 80 and storage tanks 18d-f, as the side pod 80 may be mounted to the body 12 in place of the engine housing 15. This helps to improve the space efficiency of the material handling machine 10. Additionally, mounting the gas engine 15' towards the rear of the material handling machine 10 acts as a counterweight and helps to increase longitudinal lift capacity of the material handling machine 10. It shall be appreciated that in some embodiments where the gas engine 15' is located towards the P605359GB00 rear of the material handling machine 10, a counterweight may be provided to help balance a weight of the operator cab 13 and increase lateral stability.

[0214] Although not shown in the Figures, the gas engine 15' may be mounted to the rear axle. For example, the gas engine 15' may be mounted to the rear axle using any suitable mounting arrangement (not shown). By way of example, the gas engine 15' may be fastened to a rearward part of a mounting member (not shown) to which is fastened a central part of the rear axle so that the rear axle is in front of the gas engine 15'.

[0215] A torque converter (not shown) may also be mounted directly or indirectly to the rear axle, for example using the same mounting arrangement as the gas engine 15'. The torque converter may be connected to, or formed wholly or partly integrally with, a change speed gear box and change speed gear carrying shafts of the gear box. The torque converter may be omitted or provided in some other suitable position in the drive train. Alternatively, other means for disconnecting drive to the ground engaging propulsion means 17F, 19F, 17R, 19R when the material handling machine 10 is standing may be provided.

[0216] Alternatively, a sub-assembly may be provided. The sub-assembly may include an integrated unit comprising the gas engine 15' and the rear axle. In this embodiment a change speed gear box may be disposed substantially centrally of the material handling machine 10, for example mounted to the body 12, by any suitable means.

[0217] The side pod 80 may use substantially the same mounting arrangement to the engine housing 15 of Figures 1A to IE, however modification may be made to the housing 15 to provide room for the gas lines, pipework etc of the storage tanks 18d-f. In order to provide space for the storage tanks 18d-f in the side pod 80, a width of the side pod 80 in a direction perpendicular to the longitudinal axis 11, and / or a length of the side pod 80 in a direction parallel to the longitudinal axis 11 may be increased compared to a side pod or housing for housing the engine 15', such as the engine housing 15 illustrated in Figures 1A to IE. The length of the side pod 80 may be in the range 1500mm to 2500mm, optionally in the range 1800 to 2200 mm, optionally in the range 1900mm to 2100mm, for example approximately 2000mm. The width of the side pod 80 may be in the up to 1000mm, optionally up to 900mm, for example up to 800mm. In the embodiment shown in the Figures, the width of the side pod 80 is approximately 760mm. The increase in the width of the side pod 80 may also increases a wheelbase of the chassis 30 compared to a standard material handling machine. Put another way, the wheelbase may be increased to accommodate a side pod 80 of greater length. The wheelbase may be in the range 2000mm to 4500mm, for example in the range 2750mm to 4000mm.

[0218] A clearance may be defined between a front of the side pod 80 and the front wheels 17F, 19F and / or a rear of the side pod 80 and the rear wheels 17R, 19R. The clearance between P605359GB00 the front of the side pod 80 and the front wheels 17F, 19F may be in the range 100mm to 140mm, for example approximately 120mm. The clearance between the rear of the side pod 80 and the rear wheels 19F, 19R may be in the range 200mm to 240mm, for example approximately 220mm.

[0219] It shall be appreciated that the gas engine 15' may be located in any suitable location. In an alternative embodiments, the gas engine 15' may be located beneath the lifting arm 14. The gas engine 15' may be disposed beneath the lifting arm 14 such that a vertical plane containing the longitudinal axis of the loader arm intersects the gas engine 15'. In this example, the gas engine 15' may be disposed wholly at the rear of the material handling machine 10 (for example closer to the rear axle than to the front axle) and the gearbox may be disposed closer to the front axle.

[0220] In alternative embodiment, the gas engine 15' may be positioned in any desired longitudinal position between the front and rear axle and the gearbox may be positioned at any desired position on the material handling machine 10. Any suitable means may be provided to provide kinematically transmitted drive between the gas engine 15' and the gearbox.

[0221] In further alternative embodiments, the body 12 may be provided with a contoured or recessed region to accommodate the gas engine 15'. For example, the counterweight 84 may be provided with a recessed region for receiving the gas engine 15'. The gearbox including the torque converter housing may be mounted on the chassis 30, for example disposed within the wheelbase of the material handling machine 10 in this embodiment.

[0222] Figures 3B and 3C show an alternative embodiment of a material handling machine 100 with storage tanks 118d, 118e located in a side pod 180. Like parts with the embodiment of Figure 3A are labelled with the prefix "1". It shall be appreciated that the teachings of Figure 3A are applicable to the embodiment of Figures 3B and 3C.

[0223] In the embodiment of Figures 3B and 3C, two storage tanks 118d, 118e are provided. Each of the storage tanks 118d, 118e may have a diameter in the range 500mm to 800mm, for example in the range 600mm to 700mm. The total storage capacity of each of the storage tanks 118d, 118e may be in the range 12kg to 18kg, for example in the range 14kg to 16kg. It shall be appreciated that in some embodiments, the storage capacity of each storage tank 118d, 118e may be greater than 18kg. Storage capacities within these ranges have been found to be suitable for intense operation of the material handling machine 110, and can be used to power a higher power gas engine compared to storage tanks 118d, 118e with a lower storage capacity.

[0224] The storage tanks 118d, 118e extend substantially parallel to the longitudinal axis 111 of the material handling machine 10. As illustrated in Figure 3C, the storage tanks 118d, P605359GB00

[0225] 118e are vertically stacked. As such, the storage tanks 118d, 118e can occupy a smaller footprint for a given size of the storage tanks 118d, 118e, thereby maximising the storage in the side pod 180. The storage tanks 118d, 118e occupy a majority of a volume of the side pod 180, for example substantially an entirety of a volume of the side pod 180.

[0226] As illustrated in Figure 3C, the upper and lower storage tanks 118d, 118e are vertically aligned. The sidewall 180c of the side pod 180 tapers inwardly from the top wall 180b to the base wall 180a. Put another way, the top wall 180b has a greater width than the base wall 180a. This arrangement helps to provide a clearance between the wheels 117F, 119F, 117R, 119R and the side pod 180. The rear axle may be able to pivot with respect to the chassis 30, therefore a greater clearance may be beneficial between the rear wheels 117R, 119R and the rear of the side pod 180, for example to account for steer lock and rear axle oscillation. As such, the taper at the rear of the side pod 180 may be greater than the taper at the front of the side pod 180 so as to provide a greater clearance between the rear wheels 17R, 19R and the rear of the side pod 180 than between the front wheels 17F, 19F and the front of the sidepod 180. It shall be appreciated that this is also application to the sidepod 80 of Figure 3A.

[0227] The side pod 180 is located between the front wheels 117F, 119F and the rear wheels 117R, 119R. The side pod 180 extends along a majority of the longitudinal length of the material handling machine 110. For example, the side pod 180 may occupy substantially an entirety of the longitudinal spacing between the front wheels 117F, 119F and the rear wheels 117R, 119R. This helps to increase a possible storage capacity of the storage tanks 118d, 118e in the side pod 180.

[0228] Figures 3D and 3E show a further alternative embodiment of a material handling machine 200 with storage tanks 218d-f located in a side pod 280. Like parts with the embodiment of Figures 3A to 3C are labelled with the prefix "2". The teachings of Figures 3A to 3C are applicable to the embodiment of Figures 3D and 3E.

[0229] In the embodiments of Figures 3D and 3E, two storage tanks 218d, 218e are provided in the side pod 280. The storage tanks 218d, 218e are of substantially the same configuration to the storage tanks 118d, 118e of Figures 3B and 3C.

[0230] In the embodiment of Figures 3D and 3E, the top wall 280b of the side pod 280 extends generally downwardly from a rear to a front thereof. The downward extension of the top wall 280b helps to improve operator visibility. As illustrated in Figure 3D, a front portion of the side wall 280c may include a recessed region which receives the front wheel 217F therein. This arrangement may help to increase the potential storage capacity within the side pod 280. P605359GB00

[0231] As illustrated in Figure 3E, the material handling machine 210 includes a storage tank 218m located beneath the operator cab 213. The storage tank 218m will be described in detail below in relation to storage tank 18m of Figure 7. The teachings relating to Figure 7 are applicable to the embodiment of Figures 3D and 3E.

[0232] Figure 4 shows a further alternative location of the at least one storage tank 18g. In this embodiment, the at least one storage tank 18g is located towards the rear of the material handling machine 10. Providing the storage tank 18g towards the rear of the material handling machine 10 provides a convenient location for storing gaseous fuel. The location of the storage tank 18g at the rear of the material handling machine 10 provides natural protection from the body 12 of the material handling machine 10. Furthermore, the storage tank 18g may be located fully within the footprint of the material handling machine 10, thereby improving space efficiency of the material handling machine 10. In this embodiment, the storage tank 18g has a storage capacity greater than 5kg, for example a storage capacity greater than 6.5kg. Although only one storage tank 18g is illustrated in the embodiment of Figure 4, it shall be appreciated that more than one storage tank 18g may be located towards the rear of the material handling machine 10.

[0233] In the embodiment of Figure 4, the storage tank 18g is located rearward of the lifting arm 14. The storage tank 18g is mounted to the chassis 30 of the body 12, however it shall be appreciated that the storage tank 18g may be located at any suitable location rearward of the lifting arm 14. In particular, the storage tank 18g is located rearward of the first generally horizontal axis A. This arrangement helps to prevent the storage tank 18g from obstructing the lifting arm 14 during an operation of the material handling machine 10. The chassis 30 extends rearwardly beyond the first generally horizontal pivot axis A, and the storage tank 18g is located between the rearwardly extended portions of the chassis 30.

[0234] In this embodiment, the engine 15' may be located in the engine housing 15, as illustrated in the embodiment of Figures 1A to IE. In alternative embodiments, the engine 15' may be located at or towards the rear of the material handling machine 10. The storage tank 18g may be mounted between the opposing sidewalls 30-1, 30-2 of the chassis 30. As described above, the chassis sidewalls 30-1, 30-2 define the lifting arm housing. As such, the storage tank 18g is mounted to the lifting arm housing 30-1, 30-2 defined by the chassis 30. The at least one storage tank 18g is located between the parallel sidewalls 30- 1, 30-2 of the lifting arm housing (or chassis 30).

[0235] In the embodiment of Figure 4, in order to provide space for the storage tank 18g, the chassis 30 is extended in the rearward direction compared to a telehandler without the storage tank 18g in the location of Figure 4. The chassis 30 may be extended by a length in the range 300mm to 1200mm, for example 600mm to 900m. In particular, both of the P605359GB00 sidewalls 30-1, 30-2 are extended rearward, and the storage tank 18g is located at least partially between the rearwardly extended portion of the sidewalls 30-1, 30-2. The entirety of the storage tank 18g, or a majority of the storage tank 18g may be located between the rearwardly extended portions of the sidewalls 30-1, 30-2. This arrangement helps to provide protection to the storage tank 18g. The extension of the chassis 30 is rearward of the first horizontal axis A. Put another way, the extension of the chassis 30 is rearward of the lifting arm 14. In alternative embodiments, the length of the chassis 30 may not be extended, and the displacement actuator may be modified to provide space for the storage tank 18g. It shall be appreciated that alternative methods could be used to control tilt throughout operations of the lifting arm 14, for example an angle sensor or a separate flow of hydraulic fluid from the main control valve may be used.

[0236] The chassis 30 includes a platform 88 on which the storage tank 18g is seated. The platform 88 is located between the sidewalls 30-1, 30-2 of the chassis 30. The platform 88 helps to support the weight of the storage tank 18g. The platform 88 may extend rearward of the chassis 30. The platform 88 may be any suitable shape, for example substantially circular or substantially rectangular.

[0237] The storage tank 18g is arranged substantially vertically with respect to the central longitudinal axis 11 of the material handling machine 10. Put another way, the storage tank 18g is orientated substantially upright and extends transversely with respect to the central longitudinal axis 11 of the material handling machine 10. The storage tank 18g occupies a majority of a total height of the chassis sidewalls 30-1, 30-2. In particular, the storage tank 18g may extend up to a height of the first horizontal axis A, or up to a height of an uppermost edge of the sidewalls 30-1, 30-2. The storage tank 18g occupies a majority, for example substantially an entirety, of a space defined between the sidewalls 30-1, 30-2 in a direction transverse to the central longitudinal axis 11 (or width wise).

[0238] An alternative embodiment in which the at least one storage tank 18h, 18i is positioned towards the rear of the material handling machine 10 is illustrated in Figures 5A and 5B.

[0239] In this embodiment, two storage tanks 18h, 18i are provided. It shall be appreciated that in alternative embodiments, any suitable number of storage tanks 18h, 18i may be provided, for example one storage tank 18h, 18i or three storage tanks 18h, 19i. In this embodiment, the storage tanks 18g, 18i have a storage capacity greater than 5kg, for example a storage capacity greater than 6.5kg. Each of the storage tanks 18h, 18i of this embodiment is arranged substantially horizontally with respect to the central longitudinal axis 11 of the material handling machine 10. In particular, the storage tanks 18h, 18i are vertically stacked. For example, the storage tanks 18h, 18i may be vertically aligned, or in alternative embodiments the storage tanks 18h, 18i may be vertically offset. P605359GB00

[0240] In the embodiment of Figures 5A and 5B, the storage tanks 18h, 18i are located between the operator cab 13 and the first horizontal axis A. Put another way, an entirety of the storage tanks 18h, 18i are located forward of the first horizontal axis A. This arrangement helps to prevent the storage tanks 18h, 18i from obstructing movement of the lifting arm 14 during operations thereof. It shall be appreciated that the storage tanks 18h, 18i may be located at any suitable position between the operator cab 13 and the first horizontal axis A. In the embodiment of Figures 5A and 5B, the storage tanks 18h, 18i are located closer to the first horizontal axis A than to the operator cab 13. In particular, the storage tanks are located directly in front of the first horizontal axis A.

[0241] The storage tanks 18h, 18i are mounted between the opposing sidewalls 30-1, 30-2 of the chassis 30. As described above, the chassis sidewalls 30-1, 30-2 define the lifting arm housing 30-1, 30-2. As such, the storage tanks 18h, 18i are mounted to the lifting arm housing 30-1, 30-2 defined by the chassis 30. The at least one storage tank 18h, 18i is located between the parallel sidewalls 30-1, 30-2 of the lifting arm housing (or chassis 30). A total height of the storage tanks 18h, 18i in the vertical direction occupies a majority of the height of the sidewalls 30-1, 30-2. A length of the storage tanks 18h, 18i is greater than the distance between the sidewalls 30-1, 30-2 in the direction transverse to the longitudinal axis 11 (i.e. width wise) of the material handling machine 10 (i.e. as viewed from the rear in Figure 5B). In particular, the storage tanks 18h, 18i extend through the first and / or second sidewalls of the lifting arm housing 30-1, 30-2 (or through the opposing sidewalls of the chassis 30). Providing the storage tanks 18h, 18i extending through the sidewalls 30-1, 30-2 provides a simplified mounting arrangement for mounting the storage tanks 18h, 18i to the material handling machine 10.

[0242] In order to provide the space to locate the storage tanks 18h, 18 i at the rear of the material handling machine 10, components of the hydraulic system, for example a hydraulic tank, may be moved to the side pod 80, either in addition to or instead of the side pod storage tanks 18d-f. Alternatively, the hydraulic tank may be moved to below the rear axle. It shall be appreciated that the hydraulic tank or tanks of the material handling machine 10 may be made smaller, for example due to efficiency gains from powering the material handling machine 10 using gaseous fuel. It shall be appreciated that these teachings are applicable to all other embodiments, particularly embodiments where the storage tanks 18a-z4 are located towards the rear of the material handling machine 10.

[0243] It shall be appreciated that the teachings regarding the lengthening of the chassis 30 and / or the modification of the displacement actuator are applicable to the embodiment of Figures 5A and 5B. Furthermore, it shall be appreciated that redesigns to the counterweight 84 of the material handling machine 10 may help to create space for the P605359GB00 storage tanks 18h, 18i. For example, the counterweight 84 may be moved to a location below the rear axle, or a location below the storage tanks 18h, 19i.

[0244] In this embodiment, the engine 15' may be located in the engine housing 15, as illustrated in the embodiment of Figures 1A to IE. In alternative embodiments, the engine 15 may be located at any suitable location described above.

[0245] It shall be appreciated that the embodiments of Figures 4 to 5B may be combined with the embodiment of Figure 3 in order to increase the storage capacity of the storage tanks on the material handling machine 10. The teachings described in relation to Figure 3 are therefore applicable to the embodiment of Figure 4 to 5B.

[0246] Figures 6A and 6B show a further alternative embodiment of the at least one storage tank 18j-l. In this embodiment, the at least one storage tank 18j-l is mounted below the operator cab 13. It shall be appreciated that an entirety of the at least one storage tank 18j-l may be provided below a lowermost extend of the operator cab 13, for example an entirety of the at least one storage tank 18j-l may be provided below the floor plate 13-1. The storage tanks 18j-l may be located directly underneath the operator cab 13, or offset from the operator cab 13 but vertically below the operator cab 13 (i.e. closer to the ground surface than the operator cab 13).

[0247] As illustrated in Figure 6B, there are three storage tanks 18J-I provided, however in alternative embodiments any suitable number of storage tanks 18j-l may be provided. In this embodiment, the storage tanks 18j-l have a storage capacity greater than 7kg, for example a storage capacity greater than 8.5kg. The storage tanks 18J-I extend longitudinally with respect to the longitudinal axis 11 of the material handling machine 10. The storage tanks 18J-I are transversely aligned. Put another way, each of the storage tanks 18j-l is located substantially the same distance from the front and rear of the material handling machine 10 as the other of the storage tanks 18j-l. The storage tanks 18j-l may be located substantially centrally along the longitudinal axis 11, or may be located closer to the rear of the material handling machine 10.

[0248] The first storage tank 18j is located substantially centrally with respect to the longitudinal axis 11. Put another way, a longitudinal axis of the first storage tank 18j is coaxial with the longitudinal axis 11 of the material handling machine 10. It shall be appreciated that alternatively, the first storage tank 18j may be offset from the longitudinal axis 11. The first storage tank 18j is not, therefore, located directly below the operator cab 13. The first storage tank 18j is located between the first and second sidewalls 30-1, 30-2 of the chassis 30. As such, the first and second sidewalls 30-1, 30-2 provide protection to the first storage tank 18j. In particular, the first storage tank 18j is located directly below the lifting arm 14 when the lifting arm 14 is in the non-working position. P605359GB00

[0249] The second and third storage tanks 18k, 181 are located directly below the operator cab 13. The second and third storage tanks 18k, 181 are located adjacent the first storage tank 18j, and adjacent one another such that the storage tanks 18j-l are arranged in a split array. In particular, the storage tanks 18j-l are split by the first sidewall 30-1 of the chassis 30. As such, the first sidewall 30-1 is located between the first and second storage tanks 18j, 18k.

[0250] Figure 7 shows a further alternative embodiment where the at least one storage tanks 18m is located beneath the operator cab 13. The location of the storage tanks 18m-c underneath the operator cab 13 provides natural protection, and the at least one storage tank 18m can be located fully within the footprint of the material handling machine 10, thereby improving space efficiency. As illustrated in Figure 7, one storage tank 18m is provided, however in alternative any suitable number of storage tanks 18m may be mounted to the chassis 30. The storage tank 18m has a hydrogen storage capacity greater than 10kg, for example a storage capacity greater than 14kg.

[0251] The storage tank 18m is located in substantially the same location as the first storage tanks 18j of Figure 6A and 6B. The storage tank 18m is mounted to the chassis 30. In particular, the storage tank 18m extends below a lowermost extent of the chassis 30. The storage tank 18m is arranged longitudinally with respect to a central longitudinal axis 11 of the material handling machine 10. In the embodiment of Figure 7, the at least one storage tank 18m is located centrally with respect to the central longitudinal axis 11 of the material handling machine 10. The storage tank 18m extends along a majority of the length of the chassis 30. Further, the storage tank 18m extends between the first and second sidewalls of the chassis 30-1, 30-2. In particular, the storage tank 18m is housed between the first and second sidewalls 30-1, 30-2 of the chassis 30, as described above in relation to the first storage tank 18j of Figures 6A and 6B. It shall be appreciated that the storage tank 18m may be used in combination with storage tanks located directly below the operator cab 13.

[0252] Figure 8 shows a further alternative location of the storage tank 18n on the material handling machine 10. As described above, the material handling machine 10 includes a counterweight 84 located rearward of the operator cab 13. In the embodiment of Figure 8, the at least one storage tank 18n is located above the counterweight 82. Although in the embodiment of Figure 8 one storage tank 18n is provided, it shall be appreciated that in alternative embodiments, more than one storage tank 18n may be provided, for example two storage tanks. The storage tank 18n has a storage capacity greater than 1.5kg, for example a storage capacity greater than 2kg. It is therefore particularly advantageous to combine the embodiment of Figure 8 with the three storage tanks 18a-c below the operator cab 13 (i.e. the storage tanks 18a-c of the embodiment of Figure 2). P605359GB00

[0253] The storage tank 18n is located at the rear of the material handling machine 10, however in alternative embodiments the storage tank 18n may be located towards the rear of the material handling machine 10 (i.e. closer to the rear of the material handling machine 10 than the front of the material handling machine 10).

[0254] In the embodiment of Figure 8, the storage tank 18n is arranged longitudinally with respect to the longitudinal axis 11 of the material handling machine 10. Arranging the storage tank 18n longitudinally helps to improve rear axle oscillation. It shall be appreciated that in embodiments with more than one storage tank 18n, the longitudinal storage tanks 18n may be stacked vertically, as will be described in more detail below, or a second storage tank 18n may be located outward of the storage tank 18n. The storage tank 18n is located on the operator cab side of the material handling machine 10. In particular, the storage tank 18n is located rearward of the operator cab 13.

[0255] The storage tank 18n include a mounting arrangement 86 configured to mount the storage tank 18n to the chassis 30. The mounting arrangement 86 in the embodiment of Figure 8 includes annular mounts extending around the storage tank 18n and fixedly connected to the chassis 30. By way of example, as illustrated in Figure 8, the storage tank 18n may be mounted to a parallel sidewall 30-1 of the chassis 30 (or of the lifting arm housing). The storage tank 18n is mounted to an outer surface of the sidewall 30-1. Put another way, the sidewall 30-1 is located between the lifting arm 14 and the storage tank 18n. The storage tank 18n is located towards an uppermost edge of the sidewall 30-1.

[0256] It shall be appreciated that the storage tank 18n may be provided with a housing or a guard (not shown) for protecting the storage tank 18n from impacts, for example from debris. Furthermore, the storage tank 18n may be provided with a damping arrangement for reducing oscillation of the storage tank 18n from the rear axle. The damping arrangement may include damping members, for example made of an elastomeric material such as rubber, which absorb impact forces and prevent damage to components of the material handling machine 10.

[0257] Figures 9A and 9B show a further alternative embodiment of the location of the at least one storage tank 18o, 18p. In this embodiment, the first storage tank 18o is located on the operator cab side rearward of the operator cab 13 and above the counterweight 84, and a second storage tank 18p is located on the lifting arm side. Providing a second storage tank 18p helps to increase the storage capability of gaseous fuel on the material handling machine 10. The storage tanks 18o, 18p have a storage capacity greater thank 2.5kg, for example a storage capacity greater than 3.5kg. As illustrated in Figures 9A and 9B, in order to further increase the storage capacity, three storage tanks 18a-c are provided below the operator cab 13 of the same arrangement as the embodiment of Figure 2. P605359GB00

[0258] The lifting arm 14 is located between the first and second storage tanks 18o, 18p. The first and second storage tanks 18o, 18p are arranged substantially symmetrically about the lifting arm 14. The first storage tank 18o is mounted to the first sidewall 30-1 of the chassis 30, and the second storage tank 18p is mounted to the second sidewall 30-2. In particular, the first and second storage tanks 18o, 18p are mounted to outermost surfaces of the first and second sidewalls 30-1, 30-2. As such, the first and second sidewalls 30-1, 30-2 are both located between the first and second storage tanks 18o, 18p. The first and second storage tanks 18o, 18p are mounted at the rear of the sidewalls 30-1, 30-2.

[0259] The storage tanks 18o, 18p are arranged vertically (i.e. upright) with respect to the longitudinal axis 11 of the material handling machine 10. In alternative embodiments, the storage tanks 18o, 18p may arranged be in any suitable orientation, for example arranged longitudinally with respect to the longitudinal axis 11 of the material handling machine 10. The storage tanks 18o, 18p occupy a majority of the total height of the chassis sidewalls 30-1, 30-2. In particular, the storage tanks 18o, 18p may extend up to a height of the first horizontal axis A, or up to a height of the uppermost edge of the sidewalls 30-1, 30- 2.

[0260] Figure 10 shows a further alternative embodiment of the location of the storage tanks 18q, 18r. In the embodiment of Figure 10, the at least one storage tank 18q, 18r is mounted to the operator cab 13. Providing the storage tanks 18q, 18r mounted to the operator cab 13 provides a convenient location for storing a gaseous fuel. The storage tank 18q, 18r may be located fully within the footprint of the material handling machine 10, thereby improving the space efficiency of the material handling machine 10. In particular, the at least one storage tank 18q, 18r is mounted to the cab roof. This arrangement helps to improve visibility because the storage tanks 18q, 18r do not obstruct the line of sight of the operator. In the embodiment of Figure 10, two storage tanks 18q, 18r are provided. The storage tanks 18q, 18r have a storage capacity of greater than 2.5kg, for example greater than 3.5kg. The storage tanks 18q, 18r may be combined with the storage tanks 18a-c of the Figure 2 embodiment in order to further increase the storage capacity of the material handling machine 10.

[0261] As illustrated in Figure 10, the storage tanks 18q, 18r are arranged longitudinally with respect to the longitudinal axis 11 of the material handling machine 10. The storage tanks 18q, 18r extend along a majority of a length of the operator cab 13, wherein the length of the operator cab 13 extends in a direction parallel to the longitudinal axis 11. In particular, the storage tanks 18q, 18r extend substantially along an entirety of the length of the operator cab 13. The storage tanks 18q, 18r may be located towards the rear of the operator cab 13 (i.e. closer to the rear of the operator cab 13 than to the front of the P605359GB00 operator cab 13). This arrangement may help to improve visibility of the lifting arm 14 when the lifting arm 14 is at or near maximum lift.

[0262] Figures llA to 11C show a further alternative embodiment where the at least one storage tank 18s-x is located at the rear of the material handling machine 10. In this embodiment, a plurality of storage tanks 18s-x are provided. In particular, six storage tanks 18s-x are provided. The storage tanks 18s-x may have a diameter in the range 100mm to 700mm, for example in the range 200mm to 600mm. In the embodiment shown in Figures 11A to 11C, each tank diameter is approximately 400mm. The storage tanks 18s-x may have a length in the range 1500mm to 2100mm, optionally in the range 1600mm to 2000mm, optionally in the range 1700mm to 1900mm, for example 1800mm. Providing a plurality of storage tanks 18s-x helps to increase the storage capability of gaseous fuel on the material handling machine. It shall be appreciated that in alternative embodiments, any suitable number of storage tanks 18s-x may be provided, for example five storage tanks. The storage tanks 18s-x may have a storage capacity greater than 20kg, optionally greater than 23kg, optionally greater than 25kg, for example greater than 27kg. In the embodiment shown in Figures 11A to 11C, the storage capacity of the storage tanks 18s- x is between 27kg and 28kg.

[0263] The storage tanks 18s-x each have a longitudinal axis extending transverse to the longitudinal axis 11 of the material handling machine 10. The storage tanks 18s-x therefore define a length which extends transverse to the longitudinal axis 11 of the material handling machine 10. The length of the storage tanks 18s-x occupies a majority of the width of the material handling machine 10. The length of the storage tanks 18s-x may be at least equal to, for example greater than, a distance between the rear wheels 17R, 19R in a direction extending transverse to the longitudinal axis 11 (i.e. the width wise direction).

[0264] The storage tanks 18s-x are located above the rear wheels 17R, 19R and rearward of the rear wheels 17R, 19R. The storage tanks 18s-x are located within the body 12 of the material handling machine 10. This arrangement provides protection to storage tanks 18s- x. In particular, the storage tanks 18s-x may be located within the counterweight 84. A shape of the body 12 at the rear of the material handling machine 10 may conform to a shape of the storage tanks 18s-x.

[0265] The storage tanks 18s-x are provided in a cluster. The storage tanks 18s-x surround the rear wheels 17R, 19R. As such, the cluster of storage tanks 18s-x forms a recessed region. For example, the cluster of storage tanks 18s-x may be substantially C-shaped when viewed from the left or right side of the material handling machine 10. The rear wheels 17R, 19R are located in the recessed region of the cluster of storage tanks 18s-x, as illustrated in Figures 11A and 11B. Put another way, a shape of the cluster of storage tanks P605359GB00

[0266] 18s-x conforms to a shape of the rear wheels 17R, 19R. This arrangement of the storage tanks 18s-x is space efficient, and helps to increase the potential storage capacity at the rear of the material handling machine 10. At least one of the storage tanks 18s-x is located behind a rearmost extent of the rear wheels 17R, 19R. At least one of the storage tanks 18s-x is located above an uppermost extent of the rear wheels 17R, 19R.

[0267] In the embodiment shown in Figures 11A and 1 IB, the storage tanks 18s-x do not obstruct the operator's line of sight out of the rear window. The storage tank 18s located closest to the operator cab 13 is located lower than the storage tank 18s which is next closest to the operator cab 13. Put another way, the uppermost storage tanks 18s, 18t, 18u are arranged diagonally adjacent when viewed from the left or right side. The storage tank 18s is lower than (or level to) the storage tank 18t, which is lower than the storage tank 18u. This arrangement improves operator visibility out of the rear window.

[0268] In the embodiment shown in Figures 11A and 11B, the storage tanks 18s-x are arranged in an irregular array. It shall be appreciated that in alternative embodiments, the storage tanks 18s-x may be arranged in any suitable array.

[0269] In some embodiments, as illustrated in Figure 11C, the rear axle may be free to pivot or articulate with respect to the body 12, for example with respect to the chassis 30. This may help to accommodate a greater capacity of gaseous fuel on the material handling machine 10. In such embodiments, a rear portion 30b of the chassis 30 to which the rear axle is mounted may be pivotable relative to a fixed portion 30a of the chassis 30. The lifting arm pivot mount 32 may be moved to a location on the fixed portion 30a of the chassis 30, as illustrated in Figure 11C. This enables additional storage tanks 18a-z4 to be located at the rear of the material handling machine 10 on the rear portion 30a of the chassis 30 (i.e. on the moveable section). In alternative embodiments, the rear axle may be fixed with respect to the chassis 30.

[0270] Figure 12 illustrates a further alternative embodiment where the at least one storage tank 18yl-y3 is located at the rear of the material handling machine 10. In particular, the at least one storage tank 18yl-y3 is located behind the operator cab 13. In this embodiment, a plurality of storage tanks 18yl-y3 are provided. In particular, three storage tanks 18yl- y3 are provided. The storage tanks 18yl-y3 may have a diameter in the range 50mm to 450mm, optionally in the range 150mm to 350mm for example in the range 200mm to 300mm. In the embodiment shown in Figure 12, each tank diameter is approximately 250mm. The storage tanks 18yl-y3 may have a length in the range 1100mm to 2100mm, optionally in the range 1300mm to 1900mm, optionally in the range 1500mm to 1700mm, for example 1600mm. Providing a plurality of storage tanks 18yl-y3 helps to increase the storage capability of gaseous fuel on the material handling machine 10. It shall be appreciated that in alternative embodiments, any suitable number of storage tanks 18yl- P605359GB00 y3 may be provided, for example four storage tanks may be provided. The storage tank configuration shown in Figure 12 may also be mirrored on the opposing side of the material handling machine 10 (for example so there are six storage tanks in total).

[0271] The storage tanks 18yl-y3 are arranged longitudinally with respect to the central longitudinal axis 11 of the material handling machine 10. Put another way, the storage tanks 18yl-y3 each have a longitudinal axis extending parallel to the longitudinal axis 11 of the material handing machine 10.

[0272] The storage tanks 18yl-y3 are located within the body 12 of the material handling machine 10. This arrangement provides protection to the storage tanks 18yl-y3. In particular, the storage tanks 18yl-y3 may be located within the counterweight 84. A shape of the counterweight 84, or body 12, may conform to a shape of the storage tanks 18yl-y3.

[0273] The storage tanks 18yl-y3 are located above the rear wheels 17R, 19R. In particular, the storage tanks 18yl-y3 extend longitudinally beyond the rear wheels 17R, 19R in a rearward direction. The storage tanks 18yl-y3 conform to a shape of a rear of the operator cab 13. In particular, the storage tanks 18yl-y3 conform to a shape of the rear wall of the operator cab 13. In the embodiment shown in Figure 12, the operator cab 13 includes a rear wall 33a, 33b with a first section 33a which extends from the cab roof in a direction towards the rear wheels 17R, 19R or the body 12, and a second section 33b which extends from the first section 33a in a direction towards the front of the material handling machine 10 and is angled with respect to the first section 33a. This shape of operator cab 13 helps to provide space for the rear wheels 17R, 17F.

[0274] The storage tanks 18yl-y3 occupy less than half, for example less than one third, a height of the first section 33a of the rear wall 33a, 33b. This helps to improve operator visibility out of the first section 33a of the rear wall 33a, 33b.

[0275] As illustrated in Figure 12, the plurality of storage tanks 18yl-y3 comprise a first row of storage tanks 18yl and a second row of storage tanks 18y2, 18y3 stacked on top of the first row of storage tanks 18yl. In the embodiment shown in Figure 12, the first row of storage tanks 18yl include one storage tank 18yl, and the second row of storage tanks 18y2, 18y3 includes two storage tanks 18y2, 18y3. The storage tanks 18yl-y3 are arranged in the first and second rows in a substantially triangular arrangement, however any suitable arrangement may be used. The first and second rows of storage tanks 18yl- y3 may each include any suitable number of storage tanks 18yl-y3, and in some embodiments the same number of storage tanks 18yl-y3 may be located in the first and second rows.

[0276] Each of the plurality of storage tanks 18yl-y3 includes a first end and an opposing second end. The first end is located behind the operator cab 13 and the second end is located P605359GB00 rearward of the first end. The first and second ends of the storage tank 18yl in the first row is located in front of the respective first and second ends of the storage tanks 18y2, 18y3 in the second row in the longitudinal direction. Put another way, the first and second ends of the storage tank 18yl in the first row are located closer to the front of the material handling machine 10 than the respective first and second ends of the storage tanks 18y2, 18y3 in the second row.

[0277] In the embodiment of Figure 12, the tanks valves may be located at the second end of the storage tanks 18yl-y3. This increases accessibility to the tank valves, for example for maintenance operations.

[0278] It shall be appreciated that the teachings relating to Figure 11C are also applicable to the embodiment of Figure 12.

[0279] Figure 13 illustrates a further alternative embodiment where the at least one storage tank 18zl-18z4 is mounted to the chassis 30. In particular, the chassis 30 includes a storage tank housing 30-1, 30-3 configured to house the at least one storage tank 18zl-18z4. In this embodiment, a plurality of storage tanks 18zl-18y3 are provided. In particular, four storage tanks 18zl-dd are provided.

[0280] The storage tanks 18zl-dd may have a diameter in the range 50mm to 450mm, for example in the range 150mm to 250mm. In the embodiment shown in Figure 13, each tank diameter is approximately 200mm. The storage tanks 18zl-dd may have a length in the range 2000mm to 3000mm, for example in the range 2200mm to 2800mm, optionally in the range 2400mm to 2600mmm, for example approximately 2500mm. Providing a plurality of storage tanks 18zl-dd helps to increase the storage capability of gaseous fuel on the material handling machine 10. It shall be appreciated that in alternative embodiments, any suitable number of storage tanks 18zl-dd may be provided, for example two, three, five or six storage tanks. The total storage capacity of the storage tanks 18zl-zz may be greater than 6kg, optionally greater than 9kg, optionally greater than 12kg, optionally greater than 15kg, for example greater than 18kg.

[0281] The storage tanks 18zl-18z4 are arranged longitudinally with respect to the central longitudinal axis 11 of the material handling machine 10. Put another way, the storage tanks 18zl-dd each have a longitudinal axis extending parallel to the longitudinal axis 11 of the material handling machine 10. In embodiments where the operator cab 13 is offset relative to the central longitudinal axis of the body 12, the storage tank housing 30-1, 30- 3 may be located on the same side of the body 12 as the operator cab 13. It shall be appreciated that the storage tank housing 30-1, 30-3 may be located between the operator cab 13 and the lifting arm 14, or underneath the operator cab 13. P605359GB00

[0282] The storage tank housing 30-1, 30-3 includes first and second parallel sidewalls 30-1, 30- 3 which house the storage tanks 18zl-dd, The storage tanks 18zl-dd are mounted to the storage tank housing 30-1, 30-3 using any suitable mounting arrangement. One of the sidewalls 30-1, 30-2 of the chassis 30 partially defines the storage tank housing 30-1, 30- 3. In the embodiment shown in Figure 13, it is the sidewall 30-1 located closest to the operator cab 13 which partially defines the storage tank housing 30-1, 30-3. In particular, the sidewall 30-1 is one of the first and second parallel sidewalls 30-1-30-2 of both the lifting arm housing 30-1, 30-2 and of the storage tank housing 30-1, 30-2. As such, the three sidewalls 30-1-30-3 are parallel and laterally spaced apart from one another. The lifting arm 14 is located between the sidewalls 30-1, 30-2, and the storage tanks 18zl-dd are located between the sidewalls 30-1, 30-2.

[0283] In the embodiment shown in Figure 13, the storage tanks 18zl-18z4 are arranged longitudinally adjacently. A total length of the storage tanks 18zl-dd is at least the length of the wheelbase. In Figure 13, the total length of the storage tanks 18zl-dd is greater that the length of the wheelbase.

[0284] The plurality of storage tanks 18zl-dd includes one or more first storage tanks 18zl, 18z3, and one or more second storage tanks 18z2, 18z4. The one or more first storage tanks 18zl, 18z3 are located longitudinally adjacent the one or more second storage tanks 18z2, 18z4. Put another way, a second end of the first storage tank 18zl, 18z3 is located longitudinally adjacent a first end of the second storage tank 18z2, 18z4.

[0285] Two first storage tanks 18zl, 18z3 are provided, and two second storage tanks 18z2, 18z4 are provided. It shall be appreciated that in alternative embodiments, any suitable number of first and / or second storage tanks 18zl-z4 may be provided. The first storage tanks 18zl, 18z3 are vertically aligned, and the second storage tanks 18z3, 18z4 are vertically aligned. Put another way, respective first and second ends of the first storage tanks 18zl, 18z4 are located the same distance from the front of the material handling machine 10, and respective first and second ends of the second storage tanks 18z2, 18z4 are located the same distance from the front of the material handling machine 10. As such, in this embodiment, when the material handling machine 10 is viewed from the cab side or the lifting arm side, the storage tanks 18zl-dd form a regular 2x2 array. Put another way, when the material handling machine 10 is viewed from the cab side or the lifting arm side, the storage tanks 18zl-dd occupy a substantially rectangular area.

[0286] It shall be appreciated that in some embodiments, three first storage tanks and three second storage tanks may be provided. In such embodiments, the storage tanks may form a regular 2x3 array when viewed from the cab side or the lifting arm side. It shall be appreciated that in some embodiments, the storage tanks may be arranged in an irregular array. P605359GB00

[0287] In an alternative embodiment not shown in the Figures, the at least one storage tank 18a- z4 may be mounted to the lifting arm 14. Mounting the at least one storage tank 18a-z4 to the lifting arm 14 may be particularly advantageous because the body 12 of a traditional diesel-powered material handing machine may be used, with minimal alterations to accommodate the storage tanks 18a-z4. In particular, the at least one storage tank 18a- z4 may be mounted to a first end of the lifting arm 14, wherein the first end is remote from the body 12 when the lifting arm 14 is in a working position.

[0288] In the embodiments of Figures 6A to 10, it shall be appreciated that the engine 15' may be provided in the engine housing 15, for example in the location illustrated in Figures 1A to IE.

[0289] In a further alternative embodiment wherein the material handling machine 10 includes a front or rear stabiliser arrangement, the machine storage tank 18a-z4 may be located in or adjacent the front or rear stabiliser arrangement of the material handling machine 10. The front and / or rear stabiliser arrangement may include a stabiliser body to which the stabiliser legs 76 are moveably mounted, and the at least one storage tank 18a-z4 may be located adjacent the stabiliser body, for example underneath the stabiliser body.

[0290] Figure 14 shows a further alternative embodiment of the material handling machine310. In this embodiment, a further alternative location of the storage tanks 318 is illustrated.

[0291] In this embodiment, the material handling machine 10 may include at least one storage tank mounted below the operator cab 313. Although not illustrated in Figure 14, it will be understood that this embodiment may include one or more storage tanks underneath the operator cab 313 as has been described with reference to Figures 6A and 6B. It will be understood that in this embodiment, the storage tank 18j may be omitted.

[0292] It shall be appreciated that an entirety of the at least one storage tank may be provided below a lowermost extend of the operator cab 313. For example, a majority or an entirety of the at least one storage tank may be arranged below the floor plate of the operator cab 313. Put another way, the at least one storage tank may be located directly underneath or directly below the operator cab 313, or may be offset from the operator cab 313 but vertically below the operator cab 313 (i.e. closer to the ground surface than the operator cab 13).

[0293] In the present embodiment, the at least one storage tank arranged below the operator cab 313 may be arranged to extend longitudinally with respect to the longitudinal axis of the material handling machine 10. In other embodiments, the storage tank or tanks underneath the operator cab 313 may be arranged transverse to the longitudinal axis of the material handling machine 310. P605359GB00

[0294] In some embodiments, one longitudinal storage tank may be arranged underneath the operator cab 313. The storage tank may be arranged so as to be within, e.g. entirely within, the footprint of the operator cab 313. The storage tank may be arranged substantially centrally with respect to the operator cab 313 along a transverse axis of the material handling machine 310. Put another way, the storage tank may be arranged so as to be spaced apart from the lateral sides of the material handling machine 310. The storage tank may be spaced apart from the lateral side of the material handling machine 310 by a distance of at least 10cm, for example at least 15cm, for example at least or approximately 20cm. Providing this spacing between the storage tank and the lateral side of the material handling machine 310 spaces the tank away from a crash protection structure / frame on the body 312 of the material handling machine 310.

[0295] In embodiments including two or more storage tanks below the operator cab 313, the storage tanks may be transversely aligned. Put another way, each of the storage tanks may be located substantially the same distance from the front and rear of the material handling machine 310 as the other of the storage tanks that are arranged underneath the operator cab 313.

[0296] The body 312 may include a counterweight 384 to counterbalance the lifting arm 314. The counterweight 384 is positioned at an aft or rear end of the operator cab 313, for example opposite a front end the lifting arm 314 to optimise the counterbalance effect. The at least one storage tank 318 is arranged in front of the counterweight 384 along a fore-aft axis of the material handling machine 10. The at least one storage tank 318 may be arranged to extend above the counterweight 384, such that the storage tank 318 is arranged at least partially above the counterweight 384.

[0297] In the illustrated embodiment, the material handling machine 10 is provided with two counterweights 384-1, 384-2 on opposing side of the material handling machine 310. The material handling machine 310 may be provided with two storage tanks 318-1, 318-2 at the rear of the material handling machine 310.

[0298] In the illustrated example, the at least one storage tank 318 is arranged in front of the counterweight 384 along a fore-aft axis of the material handling machine 310. In this way, the at least one storage tank 318 is packaged within the existing footprint of the material handling machine 310.

[0299] In the illustrated example, the material handling machine 310 is provided with two storage tanks 318-1, 318-2 that are arranged in front of a respective counterweight 384-1, 384- 2. P605359GB00

[0300] The or each storage tank 318-1, 318-2 may be arranged to have a longitudinal axis that extends substantially vertically (i.e. upright) with respect to the longitudinal axis of the material handling machine 310.

[0301] The lifting arm 314 may be partially located between the two storage tanks 318-1, 318- 2. The first and second storage tanks 318-1, 318-2 may be arranged substantially symmetrically about the lifting arm 14.

[0302] The storage tanks 318-1, 318-2 may be arranged on the material handling machinelO such that they do not extend beyond the wheels 317F, 317R of the material handling machine 310. In this way, the storage tanks 318-1, 318-2 are arranged within the existing footprint of the material handling machine 310.

[0303] In some embodiments, a shape of the counterweight 384 may conform to a shape of the storage tanks 318-1, 318-2 and / or to a shape or a housing for the storage tanks. Put another way, a shape of the storage tanks 318-1, 318-2 or a housing for the storage tanks may confirm to the same of the counterweight 384.

[0304] In the illustrated example the respective counterweight 84 and storage tank define an L- shaped profile. The counterweight 84 is illustrated as having an inverted L-shaped profile, but in alternative arrangements, the counterweight may define an inverted L-shaped profile.

[0305] It shall be appreciated that the location of the storage tanks disclosed in any of the embodiments of Figures 2 to 13 may be combined with one or more of the other embodiments of storage tank locations on the materials handling machine 10. Put another way, the materials handling machine 10 may include storage tanks at one or more of the locations disclosed in Figures 2 to 13.

[0306] The one or more embodiments are described above by way of example only and it will be appreciated that the various aspects and features may be variously modified. For example, although principally aimed towards material handling machines such as telehandlers, the disclosure may apply to other forms of working machine. These variations are possible without departing from the scope of protection afforded by the appended claims.

Claims

P605359GB00Claims1. A material handling machine comprising: a body mounted on a ground engaging structure; a lifting arm pivotally mounted to the body; a gas engine configured to provide motive power to the ground engaging structure; an operator cab mounted to the body adjacent the lifting arm; at least one storage tank for supplying a gaseous fuel to the gas engine, wherein the at least one storage tank is located towards a rear of the material handling machine.

2. The material handling machine according to claim 1, comprising at least one storage tank located beneath, e.g. directly underneath, the operator cab.

3. The material handling machine according to claim 2, wherein the at least one storage tank is arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

4. The working machine according to claim 2 or claim 3, comprising a single storage tank beneath the operator cab, said storage tank arranged substantially centrally with respect to the operator cab along a transverse axis of the material handling machine.

5. The working machine according to any one of claims 2 to 4, wherein the at least one storage tank is spaced apart from a lateral side of the working machine.

6. The working machine according to claim 5, wherein the at least one storage tank is spaced apart from a lateral side of the working machine by a distance of at least 20cm.

7. The material handling machine according to any preceding claim, comprising a counterweight located rearward of the operator cab.

8. The material handling machine according to claim 7, comprising a gas storage tank arranged in front, e.g. directly in front, of the counterweight with respect to a central longitudinal axis of the material handling machine.

9. The material handling machine according to claim 8, comprising two counterweights on opposing side of the material handling machine, wherein a storage tank is arranged in front of each counterweight.P605359GB0010. The material handling machine according to claim 9, wherein a part of the lifting is located between the storage tanks.

11. The material handling machine according to any one of claims 8 to 10, wherein a shape of the at least one storage tank conforms to a shape of the counterweight.

12. The material handling machine according to any one of claims 8 to 11, wherein the or each storage tank is arranged to have a longitudinal axis that extends substantially vertically (i.e. upright) with respect to the longitudinal axis of the material handling machine.

13. The material handling machine according to any preceding claim, comprising at least one storage tank located within the body, optionally wherein the at least one storage tank is located within a counterweight of the body.

14. The material handling machine according to any preceding claim, wherein the ground engaging structure comprises a pair of front wheels and a pair of rear wheels, wherein the at least one storage tank comprises a plurality of storage tanks located at the rear of the material handling machine, and wherein the plurality of storage tanks are located above and / or rearward of the rear wheels.

15. The material handling machine according to claim 14, wherein the plurality of storage tanks are arranged in a cluster surrounding the rear wheels, optionally wherein the cluster is a substantially C-shaped cluster when viewed from a left or right side of the material handling machine.

16. The material handling machine according to any preceding claim, comprising a plurality of storage tanks each having a longitudinal axis extending transversely to a longitudinal axis of the material handling machine.

17. The material handling machine according to claim 16, wherein the plurality of storage tanks each define an elongate length, and wherein the elongate length occupies a majority of a width of the material handling machine.

18. The material handling machine according to claim 17, wherein the ground engaging structure comprises a pair of front wheels and a pair of rear wheels, and wherein the elongate length of each of the plurality of storage tanks is equal to or greater than a distance in a transverse direction between the rear wheels.

19. The material handling machine according to any preceding claim, wherein the ground engaging structure comprises a pair of front wheels and a pair of rear wheels, and wherein the material handling machine comprises a plurality of storage tanks located at the rear of the material handling machine above the rear wheels.P605359GB0020. The material handling machine according to claim 19, wherein the plurality of storage tanks each extend longitudinally beyond the rear wheels in a rearward direction.

21. The material handling machine according to claim 19 or claim 20, wherein the plurality of storage tanks are each arranged longitudinally with respect to a central longitudinal axis of the material handling machine.

22. The material handling machine according to any preceding claim, wherein the body comprises a chassis, and wherein the material handling machine comprises at least one storage tank mounted to the chassis and located behind the lifting arm.

23. The material handling machine according to claim 22, wherein the chassis comprises a pair of parallel sidewalls configured to receive the lifting arm therebetween, and wherein the at least one storage tank is located between the parallel sidewalls of the chassis.

24. The material handling machine according to any preceding claim, wherein the material handling machine is a telehandler.

Images