Abstract: An improved oil tank for storing hydraulic fluid and the hydraulically-powered system is fabricated from a polymeric material which is resistant to chemical breakdown from oil. The tank is constructed in a manner which facilitates internal circulation of hydraulic oil during use. The novel configuration of the tank lends itself to inexpensive fabrication through a rotational molding process. The tank is lightweight, inexpensive to manufacture, and is particularly advantageous for use in vehicle-mounted hydraulic drive systems.

Abstract: A rear discharge concrete mixer vehicle having a chassis comprising a cab for the vehicle operator; control means in the cab for operation of the vehicle; a rotary drum on the vehicle chassis; a discharge chute associated with the rotary drum; and auxiliary control means on the chassis for operation of the vehicle remote from the cab.

Abstract: An auger swivel for a concrete mixer includes a channel mounted to a bowl. A center member is pivotally connected to a pivot point near the channel and near an outer surface of the bowl. The center member includes a pair of first wings that extend from the pivot point, opposite each other and away form the bowl. Two slides are received in the channel and are positioned away from each other by a ring. Two second wings are provided. One of the second wings is pivotally connected to one of the first wings at one of its ends and pivotally connected to one of the slides at its other end. The other second wing is similarly connected to the other first wing and the other slide. An actuator rotates the center member about the pivot point and causes the slides to rotate around the outer surface of the bowl and about a longitudinal axis passing through the bowl.

Abstract: The invention relates to a concrete mixer truck having a rotatably driven mixer drum, particularly a drum provided with interior mixing elements, and a hydraulic system as a drive source for the mixing process.It is intended to enhance the effect of the mixing process by transmitting vibration energy to the mixture materials. To this effect, a vibration generator is included in the hydraulic system in such a manner that pressure pulses generated in the flow of the hydraulic fluid are superimposed on the mixing movement in the form of vibrations. This superposition effect may be achieved with respect to the rotation of the drum and/or with respect to the movements of a separate mixing tool.

Abstract: A hydraulic apparatus drives a semi-trailer hitched to a road tractor and a hydraulic equipment device carried by the semi-trailer. The apparatus includes an auxiliary motor capable of driving the device, for example a concrete mixer, through a hydraulic circuit when the vehicle is traveling along the ground, and an electric circuit for controlling valves which, when the vehicle is stationary, put in communication the circuit and a hydrostatic circuit which drives the concrete mixer. The hydrostatic circuit motorizing the semi-trailer is used for alternately driving either the axles of the semi-trailer or the equipment device to be driven.

Abstract: A processing apparatus for sludge and liquid waste comprising a wheeled vehicle having a frame, a drum type mixer mounted for rotation on said frame, motive power means including a hydraulic pump, a hydraulic motor for rotating said drum type mixer mounted on said frame operable in response to output from said hydraulic pump, waste feed means mounted on said frame, a hydraulic motor for said waste feed means on said frame operable in response to the output of said pump for feeding waste into the input end of said mixer, storage means on said frame for storing a supply of processing agent for said waste, processing agent feed supply means on said frame a hydraulic motor for said processing agent feed means on said frame operable in response to output of said pump for feeding processing agents from said storage means to said mixer, delivery means mounted on said frame for delivering output from said drum type mixer for conveyance to a remote location, valve control means for supplying output of said pump to sai

Abstract: A mixing and delivery system for concrete or the like wherein the delivery range of a mixing auger trough is extended by two (2) delivery chutes which can be selectively deployed. The chutes are stored secured to and beneath the trough in end-to-end relation and are deployed by sliding the chutes lengthwise to extend beyond the trough. The chutes are pivotably engaged so that, in the deployed position, the distal trough may be pivoted out of deployment if it is not needed.

Abstract: A mixer having a mixing trough rotatable about a longitudinal axis with a charging and discharging opening and rotatable mixing and kneading blades within the trough is provided. A mixing shaft is connected to the blade and is driven by at least one hydraulic motor coupled directly to the mixing shaft. The motor is reversibly drivable by means of a displacement-controllable pressure pump. A driving clutch is provided between the mixing shaft and the mixing trough so that the mixing trough can be rotated and locked into different pivotal positions by an indexing fixing device.

Abstract: The drive for rotating the drum of a vehicular cement mixer includes a mechanical power train mounted in a first chamber of a drive housing and a hydrostatic motor disposed in a second housing chamber substantially surrounded by yet another chamber defined in part by an outer wall of diecast aluminum formed on an outside surface with a plurality of outwardly extending fins and on an inside surface with a plurality of support plates connected to an inner housing well defining the inner chamber. The outer chamber communicates with the inner chamber by means of an overflow outlet at the top of the inner housing wall, oil escaping from the inner chamber via the outlet flowing down the support members to the inner surface of the outer housing wall.

Abstract: In a cement-mixer truck having a mixing drum rotated via a step-up transmission by a hydrostatic motor in turn energized by a power pump driven by the vehicle engine, the motor is disposed in a chamber at least partially filled with coolant replenished by leakage from the power pump and the motor and by oil from a valve housing supplied via a pressure-regulating and a bleeding valve respectively tapping high-pressure and low-pressure pumping conduits of a hydraulic circuit. The motor coolant chamber is surrounded by an oil reservoir connected at an output via an internal filter and a second engine-driven pump to the hydraulic circuit for feeding oil thereto and at an input via a heat exchanger to the motor chamber for drawing hot fluid from the motor bath, the reservoir serving in part to reduce noise from the hydraulic motor. A ventilating fan at the heat exchanger and a water pump are driven directly by the same shaft that is connected to the step-up transmission.