Mainframes for a self-propelled machine are disclosed. The mainframe includes first and second pockets that extend from the front end to the rear end of the mainframe. A hydraulic reservoir housing extends from the first side to the second side of the mainframe. The hydraulic reservoir housing is disposed between the front end of the mainframe and first and second drive openings.

A fleet for delivering packages comprising a first number of containers, each container comprising at least one compartment for receiving packages at a main distribution center. The container comprises a first attachment member on an outer surface and a second attachment member on an outer surface. The fleet comprises a second number of long-range transports, each long-range transport is configured to carry multiple containers from the main distribution center to an intermediate distribution center, each long-range transport comprising multiple first attachment receivers, whereby the multiple containers are attached to the long-range transports during transport from the main distribution center to the intermediate distribution center. The fleet comprises a third number of short-range tractors, each short-range tractor is configured to carry at least one container from the intermediate distribution center to delivery destinations for the packages in the container, each tractor comprising at least one second attachment receiver, whereby the at least one container is attached to the short-range tractor during transport from the intermediate distribution center to the delivery destinations and back to the intermediate distribution center. The third number is at least twice as large as the second number and wherein the first number is at least twice as large as the third number.

A refuse vehicle includes a chassis supporting a plurality of wheels and a vehicle body. The vehicle body defines a receptacle for storing refuse. A lifting system is movable between a first position and a second position offset from the first position. A processing unit is in communication with a first sensor having a first field of view and a second sensor having a second field of view. The processing unit activates the second sensor upon receiving an indication, from the first sensor, that an indicator is present within the first field of view. In some embodiments, the indicator is the presence of a positive object, like a waste container. In other embodiments, the indicator is the omission of an object (e.g., no container is detected) within the field of view.

A refuse vehicle includes a chassis supporting a plurality of wheels and a vehicle body. The vehicle body defines a receptacle for storing refuse. A lifting system is movable between a first position and a second position offset from the first position. A processing unit is in communication with a first sensor having a first field of view and a second sensor having a second field of view. The processing unit activates the second sensor upon receiving an indication, from the first sensor, that an indicator is present within the first field of view. In some embodiments, the indicator is the presence of a positive object, like a waste container. In other embodiments, the indicator is the omission of an object (e.g., no container is detected) within the field of view.

A fuel trailer configured to store and process fuel. The fuel trailer includes a frame with wheels; a fuel tank mounted to the frame, and a fuel system downstream from the fuel tank to move the fuel from the fuel tank. The fuel system can include filters that remove contaminants from the fuel, pumps to move the fuel, and redundant fuel lines. A dispensing end can be positioned to dispense the fuel to an outside device.

Example loading apparatuses and vehicles that include loading apparatus are described. An example loading apparatus includes a frame, a lift arm, and an anchor member. The frame has a first mounting member, a second mounting member, a first guide rail, and a second guide rail. The first and second guide rails cooperatively define a slot. The lift arm has a lift arm first end, a lift arm second end, a lift arm first portion, and a lift arm second portion. The lift arm first portion is partially disposed within the slot. Each of the lift arm first portion and the lift arm second portion is moveable between a loading position and a dumping position. The anchor member is attached to the lift arm such that the lift arm is pivotable relative to the anchor member and moveable within the slot.

Features are disclosed for a stopping device that is resistant to forces in a first direction and compliant with forces in a second direction. The stopping device may be implemented in a roller top to restrict undesired horizontal movement of a payload being transported across the roller top. In some embodiments, the roller top can be implemented on a mobile robot to transport a payload between destinations. The stopping device can include a plurality of linkages to engage the stopping device and reduce forces applied to the stopping device by the payload. The stopping device, in an engaged position, may limit undesired horizontal movement of the payload. Further, the stopping device, in the engaged position, may respond to vertical forces applied to the stopping device by transitioning from the engaged position to a disengaged position.

Features are disclosed for a stopping device that is resistant to forces in a first direction and compliant with forces in a second direction. The stopping device may be implemented in a roller top to restrict undesired horizontal movement of a payload being transported across the roller top. In some embodiments, the roller top can be implemented on a mobile robot to transport a payload between destinations. The stopping device can include a plurality of linkages to engage the stopping device and reduce forces applied to the stopping device by the payload. The stopping device, in an engaged position, may limit undesired horizontal movement of the payload. Further, the stopping device, in the engaged position, may respond to vertical forces applied to the stopping device by transitioning from the engaged position to a disengaged position.

A deployable hay pod elevator system for a transport trailer, such as a livestock trailer, provides a readily deployable hay pod, storage pod, or supply platform with the trailer, and is readily stowable above the trailer in a raised configuration for travel. The elevator system includes a deployable supply platform and a vertical raising and lowering mechanism or lift system configured to move the supply platform relative to the trailer. The lift includes a pivot arm system coupled to a sidewall of the trailer and a lift assist mechanism, such as a linear actuator, to vertically raise and lower the deployable supply platform. The elevator system includes a supply platform pivot actuation mechanism to adjust the angle of the platform relative to the pivot arm during stowage and deployment of the system. The elevator system may be fitted to various types of vehicles to store and transport various materials.

A deployable hay pod elevator system for a transport trailer, such as a livestock trailer, provides a readily deployable hay pod, storage pod, or supply platform with the trailer, and is readily stowable above the trailer in a raised configuration for travel. The elevator system includes a deployable supply platform and a vertical raising and lowering mechanism or lift system configured to move the supply platform relative to the trailer. The lift includes a pivot arm system coupled to a sidewall of the trailer and a lift assist mechanism, such as a linear actuator, to vertically raise and lower the deployable supply platform. The elevator system includes a supply platform pivot actuation mechanism to adjust the angle of the platform relative to the pivot arm during stowage and deployment of the system. The elevator system may be fitted to various types of vehicles to store and transport various materials.