This invention relates to apparatus and method for measurement and monitoring of physical properties of materials, such as liquids, and more particularly to acoustic instruments, methods, and systems that automatically measure air content in real-time within liquids, including concrete, mortar, or other hydratable cementitious mix suspensions using resonant electroacoustic transducers that have their radiating surfaces in contact with the liquid.

A mobile operating machine comprising a motor vehicle provided with at least one internal combustion motor which cooperates with a movement unit to move said motor vehicle, an articulated arm able to deliver concrete and a pumping unit configured to pump the concrete from said drum to said articulated arm. At least one of either the articulated arm or the pumping unit is connected to a respective hydraulic pump configured to pump a working fluid and determine the drive of said articulated arm and/or respectively said pumping unit. The mobile operating machine also comprises at least one electromechanical machine connected to said internal combustion motor, to said hydraulic pump, and to an electric accumulator.

A concrete mixer truck includes a chassis, a plurality of tractive assemblies coupled to the chassis, a mixing drum rotatably coupled to the chassis, the mixing drum defining an internal volume configured to contain material and an aperture through which the material can enter and exit the internal volume, an energy storage device positioned at a rear end of the chassis and configured to provide electrical energy, and an electromagnetic device electrically coupled to the energy storage device, where the electromagnetic device is configured to receive the electrical energy from the energy storage device and provide mechanical energy to drive at least one of the plurality of tractive assemblies to propel the concrete mixer truck.

A concrete mixer vehicle includes a chassis, a tractive assembly coupled to the chassis and configured to propel the concrete mixer vehicle, a mixing drum rotatably coupled to the chassis, and an electromagnetic device configured to convert electrical energy to mechanical energy to drive the tractive assembly. In a first configuration, a first battery module is removably coupled to the chassis and configured to provide the electrical energy to the electromagnetic device, and in a second configuration, the first battery module is removed from the chassis and replaced with a second battery module, the second battery module removably coupled to the chassis and configured to provide the electrical energy to the electromagnetic device.

A controller for a concrete mixer vehicle includes a base, an elongated shaft extending from the base, and a control portion positioned at free end of the elongated shaft. The control portion has a grip portion and a button interface providing at least one of a plurality of controls. The plurality of controls facilitate selectively operating (i) a hopper actuator to reposition a charge hopper between a first position and a second position, (ii) a first chute actuator to pivot a chute about a lateral axis to raise and lower a distal end of the chute, (iii) a second chute actuator to pivot the chute about a vertical axis to move the distal end left and right, (iv) a drum driver to control at least one of a speed or a rotational direction of a mixing drum, and (v) a transmission of the concrete mixer vehicle in one of a plurality of modes.

A concrete mixer vehicle comprises a chassis, an engine, a cab, a drum assembly, a front roller pedestal, a transmission mounting bracket assembly, and a rear pedestal. The chassis has a frame. The drum assembly includes a mixing drum, a drum driver, and a hopper assembly. The front roller pedestal is configured to support a front end of the mixing drum. The front roller pedestal includes a support member configured to provide support to the front roller pedestal in a longitudinal direction with respect to a longitudinal axis of the frame. The rear pedestal is configured to support a rear end of the mixing drum. The rear pedestal includes a first bar-pin member and a second bar-pin member configured to couple the rear pedestal in a first installation position or a second installation position based on a length of the mixing drum.

A concrete mixing system includes a vehicle, a rotatable mixing drum coupled to the vehicle, an incline and/or slump sensor, and a controller. The controller is configured to effect a change of rotational speed of the rotatable mixing drum in response to a signal from at least one of the sensors indicating an increased likelihood of spillage of concrete from the rotatable mixing drum.

A mixer vehicle includes a mixer drum, a first acceleration sensor, a second acceleration sensor, and a controller. The first acceleration sensor is configured to produce first acceleration signals and the second acceleration sensor is configured to measure accelerations within the mixer drum to produce second acceleration signals. The controller is configured to receive the first acceleration signals from the first acceleration sensor and second acceleration signals from the second acceleration sensor. The controller is further configured to determine a presence of material within the mixer drum based on the first acceleration signals and the second acceleration signals. The controller is further configured to determine one or more properties of the material within the mixer drum based on the first acceleration signals and the second acceleration signals.

A concrete mixer vehicle includes a mixer drum, a chute, and a controller. The mixer drum has an inner volume configured to hold a mixture for transportation and placement. The chute is configured to receive mixture exiting the mixer drum and direct the mixture. The controller is configured to receive a selected mode of operation of the mixer drum and the chute. The selected mode of operation is selected from a set of multiple modes of operation of the mixer drum and the chute. The controller is configured to adjust an operation of at least one of the mixer drum or the chute to cause at least one of the mixer drum or the chute to operate according to the selected mode of operation.

Cement truck comprising a motor vehicle and a drum kit connected through connection means. The motor vehicle comprises a vehicle and a first drive system to drive the vehicle and the drum kit comprises a rotating drum and a second drive system to drive the rotating drum. The connection means comprise at least electric connection means.