Agitating – Mortar mixer type – Movable mixing chamber
Patent
1980-01-30
1982-05-11
Coe, Philip R.
Agitating
Mortar mixer type
Movable mixing chamber
60455, 60469, 366 62, B28C 518
Patent
active
043290647
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.
REFERENCES:
patent: 2676003 (1954-04-01), Oury
patent: 2968915 (1961-01-01), Feistel, Jr.
patent: 3160398 (1964-12-01), Green
patent: 3190621 (1965-06-01), Green et al.
patent: 3805082 (1974-04-01), Murray
Eymuller Helmut
Mann Egon
Coe Philip R.
Ross Karl F.
Simone Timothy F.
Zahnradfabrik Friedrichshafen AG
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