Agitating – Mortar mixer type – Methods
Patent
1976-04-23
1978-09-12
Jenkins, Robert W.
Agitating
Mortar mixer type
Methods
366 27, 366 34, 366 43, 366 60, B28C 702
Patent
active
041141938
ABSTRACT:
A system and method to control concrete production employs a loading station and a mixing truck having a rotatable mixing drum for travelling between the loading station and a job site. A control system is provided to insure that properly proportional ingredients loaded into the mixing drum at the loading station are mixed for a predetermined appropriate programmable interval of time, whether the mixing truck remains at the loading station or is in transit to the job site. The control system comprises a first portion installed at the loading station and a second portion mounted on the mixing truck, which portions are coupled together when the mixing truck is at the loading station. The first portion of the control system comprises a first time switch unit for controlling the entire time cycle (loading time and mixing time) in a first program and a second time switch unit for controlling only the loading time in a second program. The second portion of the control system comprises a third time switch unit for controlling only addition of water to the mixing drum and mixing time in the second program, which events occur while the mixing truck is uncoupled from the loading station. Releasable locking mechanisms are provided to prevent premature departure of the mixing truck from the loading station, to prevent drum rotation beyond the appropriate time interval, and to prevent premature dumping of the mixing drum.
REFERENCES:
patent: 1916745 (1933-07-01), Smith
patent: 2018964 (1935-10-01), Lindow
patent: 2858594 (1958-11-01), Eirich
patent: 3460812 (1969-08-01), Kaufman
patent: 3608869 (1971-09-01), Woodle
patent: 3627281 (1971-12-01), Peterson
patent: 3719214 (1973-03-01), Erndt
patent: 3822056 (1974-07-01), Hawes
Jenkins Robert W.
Nilles James E.
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