Abstract:
According to one aspect of an exemplary embodiment of the present disclosure, an aircraft loading/unloading vehicle includes a chassis and a first driving position located at the front of the aircraft loading vehicle. The vehicle also includes a loading platform that is coupled to the chassis. The loading platform is vertically moveable to reach a doorsill height of an aircraft. A cargo cabin is also coupled to the chassis. The cargo cabin encloses a second driving position that allows a driver to face rearward. The second driving position includes a steering controller, a gear selector, and a brake.

Description:
BACKGROUND 
       [0001]    Aircraft, particularly commercial airliners, often fly with food and drink for the passengers to enjoy in flight. The food may be provided to the airlines by a company that specializes in preparing meals specifically for airline passengers and crew. This food may be transported by catering trucks specifically designed to be loaded with catering carts and to deliver these carts to the galley of the aircraft. As such, these catering trucks travel and must be carefully maneuvered on crowded commercial airport tarmacs or ramps. 
       SUMMARY 
       [0002]    According to one aspect of an exemplary embodiment of the present disclosure, an aircraft loading/unloading vehicle includes a chassis and a first driving position located at the front of the aircraft loading vehicle. The vehicle also includes a loading platform that is coupled to the chassis. The loading platform is vertically moveable to reach a doorsill height of an aircraft. A cargo cabin is also coupled to the chassis. The cargo cabin encloses a second driving position that allows a driver to face rearward. The second driving position includes a steering controller, a gear selector, and a brake. 
         [0003]    According to another aspect of an embodiment of the present disclosure, a method of loading and/or unloading an aircraft includes driving a loading vehicle from a first driving position in a forward direction of travel toward an aircraft. The driver in the first driving position faces the forward direction of travel. A loading platform that can support cargo is positioned proximate the aircraft. The cargo is loaded onto the aircraft, and the loading vehicle is driven in a reverse direction of travel away from the aircraft by the driver in a second driving position. The driver in the second driving position is facing the reverse direction of travel. 
         [0004]    In one embodiment, the aircraft loading vehicle of the present disclosure may allow a single driver to operate the vehicle, including reversing the vehicle on a crowded airport tarmac. There may be restrictions prohibiting reversing a vehicle when part of that vehicle blocks the rearward view of a driver. According to embodiments of the present disclosure, a driver may reverse the vehicle from an alternate driving position located in a cargo cabin that allows the driver to face rearward and have substantially unobstructed sight lines out of the vehicle. 
         [0005]    Another technical advantage may include the ability for a single individual to operate the aircraft loading vehicle and load and/or unload an aircraft with catering carts without assistance from others. The driver may position the vehicle near the aircraft, then load a loading platform with wheeled catering carts. The driver may then stand on the platform and raise it to the height of the doorsill of the aircraft. The cargo cab of the vehicle may not raise with the platform. The loading platform may be elevated to allow a regional jet to be catered by an airline catering service associated with the vehicle. After loading and/or unloading the aircraft, the driver may reverse the vehicle away from and clear of the aircraft without the assistance of a spotter. 
         [0006]    Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is an environmental view of an aircraft loading vehicle approaching an aircraft according to an embodiment of the present disclosure; 
           [0008]      FIG. 2  is an environmental view of an aircraft loading vehicle of  FIG. 1  reversing away from an aircraft according to an embodiment of the present disclosure; 
           [0009]      FIG. 3  is a detailed view of an alternate driving position of the aircraft loading vehicle of  FIG. 1  according to an embodiment of the present disclosure; 
           [0010]      FIG. 4  is an environmental view of the aircraft loading vehicle of  FIG. 1  showing cargo to be loaded onto the aircraft according to an embodiment of the present disclosure; 
           [0011]      FIG. 5  is an isometric view of the aircraft loading vehicle of  FIG. 1  according to an embodiment of the present disclosure; and 
           [0012]      FIG. 6  is a flow diagram for a method of loading an aircraft according to an embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0013]    In the following description of an aircraft loading vehicle and method of loading and/or unloading cargo onto an aircraft, like numbers refer to like parts. 
         [0014]      FIG. 1  shows an environmental view of a system for loading and/or unloading cargo between an aircraft loading vehicle  10  and an aircraft. The aircraft loading vehicle  10  includes a cargo cabin  12 , a chassis  22 , and a cab  14 . The cab  14  encloses a cab driving position  16 . The cab driving position  16  may be the primary driving position when operating the aircraft loading vehicle  10 . A driver may operate the loading vehicle  10  using the steering wheel, service brakes, accelerator, parking brake, gear selector and the like as a conventional vehicle is operated. For example, a driver may sit in the cab driving position  16  and drive the aircraft loading vehicle  10  from a food preparation facility to an aircraft in order to load the cargo received from the facility. The driver may operate the aircraft loading vehicle  10  from the cab driving position  16  and maneuver the aircraft loading vehicle  10  over the road and on the tarmac towards an aircraft. Upon reaching the desired position proximate the aircraft to be loaded and/or unloaded, the driver may apply the parking brake, apply chocks to the wheels, and proceed to load the cargo transported by the aircraft loading vehicle  10  onto the aircraft. The aircraft loading vehicle  10  may be driven at any suitable speed. In certain embodiments, a maximum speed may be between 25 and 30 miles per hour. 
         [0015]    In certain embodiments, the aircraft loading vehicle  10  may have an alternate driving position  20 , which may be enclosed by the cargo cabin  12 . The alternate driving position  20  may allow the driver to operate the aircraft loading vehicle  10  in reverse to move it away from the aircraft on a crowded tarmac or commercial airline ramp. The aircraft loading vehicle  10  may be safely reversed because the driver in the alternate driving position  20  is positioned to see in the direction of travel through one or more cargo cabin windows  32  and a rear doorway  30 . The cargo cabin windows  32  may be on rear and side walls of the cargo cabin  12 . 
         [0016]    Airport restrictions and/or airline regulations may require a spotter outside of the vehicle to direct a driver who reverses a vehicle when the view behind the driver is obstructed by part of the vehicle being reversed. These restrictions may be intended to promote safety on a tarmac where there is significant aircraft and vehicle traffic and pedestrian activity. In accordance with embodiments of the present disclosure, the need for an individual spotter to guide the reverse of the vehicle may be eliminated because the driver can reverse the vehicle from the alternate driving position  20  without his view being obstructed by a portion of the vehicle, such as the cargo cabin  12 . Because the driver can see through the cargo cabin windows  32  and the rear doorway  30  of the cargo cabin  12 , he may be able to avoid any aircraft, ground support equipment, or personnel while reversing the aircraft loading vehicle  10  to back off the aircraft. 
         [0017]    As shown in  FIGS. 2 and 3 , the alternate driving position  20  may include features to allow the vehicle to be reversed by a standing driver. The alternate driving position  20  may include an alternate ignition switch  44 . The alternate ignition switch  44  may allow the driver to kill the engine from the cab driving position  16 , and after safely loading the cargo with the engine off, the driver may enter the cargo cabin  12  and start the engine of the aircraft loading vehicle  10  using the alternate ignition switch  44 . Similarly, once the driver backs the aircraft loading vehicle  10  away from the aircraft, he may kill the engine and walk safely to the cab driving position  16  to drive the vehicle  10  to its next destination. 
         [0018]    The alternate driving position  20  may also include an alternate gear selector  42 . The alternate gear selector  42  may allow the aircraft loading vehicle to be placed in reverse from the alternate driving position  20 . In addition, the alternate gear selector may allow the vehicle to be placed in neutral or park. In certain embodiments, the vehicle  10  may be more safely operated because the alternate gear selector  42  may not allow a driver in the alternate driving position  20  to put the vehicle into forward drive gear. 
         [0019]    According to one embodiment, the alternate driving position  20  may only allow the driver to operate the vehicle at an idle speed. There may be no accelerator functionality available to the driver from the alternate driving position  20 . In other embodiments, reversing the alternate aircraft loading vehicle  10  from the alternate driving position  20  may be done in the conventional manner where the driver in the alternate driving position  20  may accelerate the aircraft loading vehicle  20  in reverse. 
         [0020]    The alternate driving position  20  may also include an alternate service brake  48 . In certain embodiments, the alternate service brake  48  may be a pedal. In other embodiments, the alternate service brake  48  may be a hand brake. An alternate parking brake  46  may also be accessed by the driver in the alternate driving position  20 . 
         [0021]    The alternate driving position  20  may also include an alternate steering wheel  40 . The alternate steering wheel  40  may allow the driver to steer the vehicle  10  from the alternate driving position  20 . In certain embodiments, the alternate steering wheel  40  may steer the front wheels  36  of the aircraft loading vehicle  10 . In this manner, the front wheels  36  may be steered opposite the direction of travel of the aircraft loading vehicle  10 . This type of steering is known in the art and is a common method of steering forklifts and other material handling or excavating vehicles. 
         [0022]    The aircraft loading vehicle  10  may be equipped with hydraulic steering such that rotating the alternate steering wheel  40  causes pressurized hydraulic systems mounted on the chassis  22  to assist the movement of the front wheels  36 . The chassis  22  may be similar to a mobile belt loader manufactured by Tug Technologies Corp., Model No. 660. According to one embodiment, the steering system may be an orbitrol-operated hydraulic cylinder steering system that allows the front wheels  36  to be steered by the steering wheel in the cab driving position  16  and by the alternate steering wheel  40 . Mechanical input applied at the alternate steering wheel  40  may cause appropriate mechanical linkages to turn the front wheels  36 . In an alternate embodiment, the alternate steering wheel  40  may steer the rear wheels of the vehicle while the front wheels remain substantially in line with the vehicle. In still other embodiments, all four wheels of the vehicle may be steered by the driver using the alternate steering wheel  40 . 
         [0023]    The engine that drives the aircraft loading vehicle  10  may be powered by gasoline, diesel fuel, electricity or some combination thereof. In alternate embodiments, the aircraft loading vehicle  10  may be powered by liquid propane. The chassis  22  may also include a solid mount suspension system. The chassis  22  may support a loading platform  24  and the cargo cabin  12  to allow the aircraft loading vehicle  10  to function as a catering truck. 
         [0024]    The cargo cabin  12  may be secured to the chassis  22 . The aircraft loading vehicle  10  may function as a catering vehicle even through the cargo cabin  12  may not elevate away from the chassis  22 . In conventional aircraft catering vehicles, the cargo cabin raises away from the chassis to be approximately level with the doorsill of the aircraft and the cargo can be easily moved from the cargo cabin  12  to the aircraft. 
         [0025]    According to embodiments of the present disclosure, a loading platform  24  may be loaded with the cargo transported in the cargo cabin  12  as shown in  FIG. 4 . The cargo may be wheeled catering carts. Once the catering carts are loaded on the loading platform  24 , the loading platform  24  may be elevated to approximately the height of the aircraft doorsill. In certain embodiments, the loading platform  24  may reach doorsill heights between 36 and 78 inches. This height may allow regional jets to receive aircraft catering. In other embodiments, the loading platform  24  may elevate higher than 78 inches to serve larger aircraft, or lower than 36 inches. To serve intercontinental jet airliners, the loading platform  24  of the aircraft loading vehicle  10 , according to an embodiment of the present disclosure, may reach an aircraft doorsill height of up to 228 inches. The driver or other individual loading the aircraft may be elevated on the loading platform  24  together with the cargo. Safety for this individual may be provided by the handrails  50 . 
         [0026]    The elevation of the loading platform  24  may be accomplished by a lift system  26  as shown in  FIG. 5 . The lift system  26  may be a scissor lift system that is known in the art. The loading platform  24  may be located toward the front of the vehicle  10  and beside the cab  16 . In this embodiment, the cab  16  may be a half-cab, which may only have space for one person as the driver. The loading platform  24  may raise and lower along the height of a front cabin doorway  34 , while the cargo cabin  12  remains fixed. In other embodiments, the cargo cabin  12  may raise and lower as is common in conventional aircraft catering trucks. 
         [0027]    A method  60  of loading an aircraft is illustrated by the flow diagram as shown in  FIG. 5 . An aircraft may be unloaded according to the teachings of the present disclosure as well. The method  60  starts at step  62  where an aircraft loading vehicle  10  is driven toward an aircraft from a cab driving position  16 . The cab driving position  16  may be a forward or front driving position. Once the aircraft loading vehicle  10  is positioned in a suitable position for loading the aircraft, it may be parked, and the cargo may be moved from the cargo cabin  12  to the loading platform  24  at step  64 . The loading platform  24  may be in a lowered position and may hold approximately four catering carts to supply food and drinks to a regional jet. The wheeled catering carts may be rolled directly onto the loading platform  24  through the front cargo cabin doorway  34 . 
         [0028]    At step  66 , the loading platform  24  may be raised using the lift system  26  to elevate the loading platform  24  supporting the catering carts. An individual may also be supported and elevated by the loading platform  24 . In certain embodiments, only the loading platform may elevate from its lower transport position and be elevated to the height of the doorsill of the aircraft. In other embodiments, the cargo cabin  12  may be elevated with the loaded platform  24 . 
         [0029]    At step  68 , the aircraft may be loaded with the cargo. This operation may involve the driver or other individual pushing the wheeled carts from the loading platform  24  to a galley location on the aircraft where the contents of the cargo carts may be accessed by the flight attendants and served to the passengers of the aircraft in flight. Once the cargo is loaded onto the aircraft, the platform  24  may be lowered to its transport position. Before lowering the platform  24 , trash, empty catering carts, cart drawers, and other items which may be removed from the passenger cabin of the aircraft may be loaded onto the platform  24 . The platform  24  may also support catering carts and allow a drawer exchange or a product refresh to be performed by the individual. A product may be refreshed without actually moving an entire cart from the platform  24  to the aircraft. A drawer exchange may include removing empty or used cart drawers from the cargo cabin and replacing those drawers with fully stocked drawers transported by the cargo cabin  12 . The empty or used drawers may be removed from the aircraft and transported to the catering facility on the aircraft loading vehicle  10 . Once lowered to transport level, the discarded cargo may be moved from the platform  24  to the cargo cabin  12 . The platform may be loaded with additional cargo and the additional cargo may be transferred onto the aircraft after raising the loading platform  24 , or the loading may be complete and the aircraft loading vehicle  10  may be prepared to be moved away from the aircraft to allow the aircraft to depart. 
         [0030]    Backing the aircraft loading vehicle  10  off and clear of the aircraft may be accomplished by driving the aircraft loading vehicle  10  away from the aircraft from the alternate driving position  20  at step  72 . The driver may enter the cargo cabin  12  through the rear doorway  30 , which may require opening a rollup door. The driver may then position himself in the alternate driving position  20  and look for any obstacles out of the cargo cabin windows  32 . The driver may then start the engine using the alternate ignition switch  44 . Then, the driver may engage the gears so that the aircraft loading vehicle  10  moves in reverse away from the aircraft. The driver may use the alternate steering wheel  40  to direct the aircraft loading vehicle  10  carefully away from the aircraft. In the alternate driving position  20 , the driver may steer the vehicle using the alternate steering wheel and brake the vehicle using the alternate service brake  48 , all while viewing out of the rear and side cargo cabin windows  32  and the rear doorway  30  in the direction of travel. In this manner, the driver may have a clear view of the tarmac behind the aircraft loading vehicle without the cargo cabin  12  or other part of the vehicle  10  blocking the view, and a spotter to direct the driver may not be necessary. The driver may see more of the tarmac and avoid the obstacles, other vehicles, equipment, individuals, and the like. Thus, one person may drive the vehicle to the load position, load and/or unload the aircraft, and back the vehicle  10  away from the aircraft. In certain embodiments, the driver may drive the aircraft loading vehicle  10  from the alternate driving position  20  back to the commissary or catering facility. 
         [0031]    Some of the steps illustrated in  FIG. 6  may be combined, modified, or deleted where appropriate, and additional steps may also be added to the flow diagrams. Additionally, steps may be performed in any suitable order without departing from the scope of the invention. 
         [0032]    The foregoing description is of exemplary and preferred embodiments. The invention, as defined by the appended claims, is not limited to the described embodiments. Alterations and modifications to the disclosed embodiments may be made without departing from the invention. The meaning of the terms used in the claims are, unless expressly stated otherwise, intended to have ordinary and customary meaning and are not intended to be limited to the details of the illustrated structures or the disclosed embodiments.