An integrated power supply includes a first low voltage DC-DC converter (LDC) that converts supply power to a first output voltage and provides the first output voltage to a first auxiliary battery and a first electric load connected to each other in parallel; a second LDC that converts the supply power to a second output voltage and provides the first output voltage to a second auxiliary battery and a second electric load connected to each other in parallel; and an integrated controller that controls the first LDC and the second LDC to change output voltages of the first LDC and the second LDC. The first auxiliary battery and the second auxiliary battery are connected in series, and when the first LDC fails, the second LDC outputs a second increase output voltage that is higher than the second output voltage under control of the integrated controller.

An access ladder assembly for a work vehicle to enable an operator to move from a ground position to a walkway of the work vehicle. A support rail includes a rail first end connected to a crossbar and a rail second end spaced from the rail first end. A slider is movably connected to the support rail to move from the rail second end toward the rail first end. An actuator includes an actuator first end connected to the crossbar and an actuator second end spaced from the actuator first end, wherein the actuator includes an extended position and a retracted position. A step is operatively connected to the actuator second end and is operatively connected to the slider, wherein the step includes a lowered position when the actuator is at the extended position and a raised position when the actuator is at the retracted position.

A switch arrangement for providing alternative distribution paths in a system for distributing electrical power in a vehicle including electrical power supplies and electrical loads. The switch arrangement includes a first switch configured to be connected to a first electrical element, a second switch configured to be connected to the first electrical element and a second electrical element, and a third switch configured to be connected to the second electrical element and a third electrical element. Each of the first, second, and third switches is independently controllable, and selective operation of each of the first, second, and third switches to its open or closed state interconnects at least two of the first, second, and third electrical elements to establish one of multiple alternative distribution paths to connect one of the power supplies and one of the loads or to connect two of the power supplies.

A switch arrangement for providing alternative distribution paths in a system for distributing electrical power in a vehicle including electrical power supplies and electrical loads. The switch arrangement includes a first switch configured to be connected to a first electrical element, a second switch configured to be connected to the first electrical element and a second electrical element, and a third switch configured to be connected to the second electrical element and a third electrical element. Each of the first, second, and third switches is independently controllable, and selective operation of each of the first, second, and third switches to its open or closed state interconnects at least two of the first, second, and third electrical elements to establish one of multiple alternative distribution paths to connect one of the power supplies and one of the loads or to connect two of the power supplies.

A mobile robot includes a non-inverted pendulum body hereafter referred to as NPB with at least one pivot axis and this pivot axis divides the NPB into two portions. One portion of the NPB contains the center of mass of the NPB that can have structures to carry external payloads. The second portion of the NPB can have one or more manipulator arm and vision units. On the pivot axis is disposed at least one leg rotatabily coupled to the NPB. The other end of the leg has a foot joint on which is disposed a drive wheel or a foot. With additional degrees of freedom for each leg the robot can move similar to humanoids, be able to carry and sustain heavy loads with minimal leg joint torques and/or manipulate heavy loads and forces with self-compensating mass of the NPB while using minimal leg joint torques.

A mobile robot includes a non-inverted pendulum body hereafter referred to as NPB with at least one pivot axis and this pivot axis divides the NPB into two portions. One portion of the NPB contains the center of mass of the NPB that can have structures to carry external payloads. The second portion of the NPB can have one or more manipulator arm and vision units. On the pivot axis is disposed at least one leg rotatabily coupled to the NPB. The other end of the leg has a foot joint on which is disposed a drive wheel or a foot. With additional degrees of freedom for each leg the robot can move similar to humanoids, be able to carry and sustain heavy loads with minimal leg joint torques and/or manipulate heavy loads and forces with self-compensating mass of the NPB while using minimal leg joint torques.

Service vehicles, such as compact service carts (e.g., compact electric vehicles), are described that support a variety of service applications. One such vehicle (100) generally includes a vehicle platform (102) and a service box (104). The vendor box (104) includes canopy doors (106) for each of the sides (110, 112, and 114). The canopy doors (106) are movable between a closed position, where the canopy door (106) encloses the service area (108), and an open position where the canopy doors (106) extend outwardly from the sides 110, 112 and 114. In the open position, the doors (106) thus function as a canopy to provide shade at the service area 108 and maximize the space available for rendering services on the sides (110, 112 and 114) of the box (104). The inventive vehicles are adaptable to meet the needs of a wide variety of service applications including food and beverage applications, medical applications, and others.

Service vehicles, such as compact service carts (e.g., compact electric vehicles), are described that support a variety of service applications. One such vehicle (100) generally includes a vehicle platform (102) and a service box (104). The vendor box (104) includes canopy doors (106) for each of the sides (110, 112, and 114). The canopy doors (106) are movable between a closed position, where the canopy door (106) encloses the service area (108), and an open position where the canopy doors (106) extend outwardly from the sides 110, 112 and 114. In the open position, the doors (106) thus function as a canopy to provide shade at the service area 108 and maximize the space available for rendering services on the sides (110, 112 and 114) of the box (104). The inventive vehicles are adaptable to meet the needs of a wide variety of service applications including food and beverage applications, medical applications, and others.

An electrical power system for a delivery vehicle is provided. The power system is used in connection with a delivery vehicle having an engine, and also having a liftgate powered by an electric motor. The electrical power system includes a first battery, a second battery, and an alternator. The electrical power system also includes a super capacitor. The super capacitor has a first capacitor bank and a second capacitor bank, wherein each of the first capacitor bank and the second capacitor bank comprises ultra-capacitor cells placed in series. The first capacitor bank and the second capacitor bank reside in parallel. In addition, the first battery and the second battery reside in parallel with the second capacitor bank. Together, the first battery, the second battery and the second capacitor bank supply power to the liftgate motor. Finally, the first capacitor bank is in electrical communication with the alternator and supplies power, with the alternator, to a relay start for the delivery vehicle to start the engine.

An electrical power system for a delivery vehicle is provided. The power system is used in connection with a delivery vehicle having an engine, and also having a liftgate powered by an electric motor. The electrical power system includes a first battery, a second battery, and an alternator. The electrical power system also includes a super capacitor. The super capacitor has a first capacitor bank and a second capacitor bank, wherein each of the first capacitor bank and the second capacitor bank comprises ultra-capacitor cells placed in series. The first capacitor bank and the second capacitor bank reside in parallel. In addition, the first battery and the second battery reside in parallel with the second capacitor bank. Together, the first battery, the second battery and the second capacitor bank supply power to the liftgate motor. Finally, the first capacitor bank is in electrical communication with the alternator and supplies power, with the alternator, to a relay start for the delivery vehicle to start the engine.