Agitating – Mortar mixer type – With dynamic charging
Patent
1984-03-22
1985-10-01
Jenkins, Robert W.
Agitating
Mortar mixer type
With dynamic charging
366 40, 366151, B28C 712
Patent
active
045442754
ABSTRACT:
The invention relates to a concrete mixer truck having a mixer drum adapted to be rotatably driven, a water container, a water conduit leading from the container to the drum, and a water pump. An object of the invention is to prevent the quality of a properly composed mixture contained in the drum from being deteriorated by unintentional addition thereto of water from the water container. This is accomplished by the use of a measuring device determining the drive torque for the mixer drum and a valve disposed in the water conduit and controlled by said measuring device in such a manner that the water conduit is closed when the drive torque exceeds a selectively adjustable rated value corresponding at least to the drive torque required for the empty drum.
For special conditions of for instance climatic nature requiring the addition of a limited amount of water prior to use, a further development of the invention provides the employ of a water supply opening switch adapted to be opened once during each valve-closure phase for admitting a limited and preselected amount of water.
REFERENCES:
patent: 2954215 (1960-09-01), Warmkessel
patent: 3593966 (1971-07-01), Munroe
patent: 3826476 (1974-07-01), Ahrenberg
patent: 3912239 (1975-10-01), Ries
patent: 4436429 (1984-03-01), Strong
Hudelmaier Ingrid
Jenkins Robert W.
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