Agitating – Mortar mixer type – Methods
Patent
1996-05-15
1998-02-03
Cooley, Charles E.
Agitating
Mortar mixer type
Methods
366 17, 366142, B28C 712
Patent
active
057136637
ABSTRACT:
A method and apparatus for mixing concrete in a concrete delivery mixing truck is provided which can yield a mix with an approximate required slump. This is achieved by monitoring the torque loading on hydraulic drive which rotates a mixing barrel and noting an anticipated minimum torque loading which, in turn, approximates to a required slump value. Liquid component is added to a mix until this minimum torque loading is noted. A CPU (17) is used to process information derived from a hydraulic pressure sensor (15) connected in the hydraulic drive motor used to rotate the mixing barrel. A volume/mass input sensor (21) can be used for meaning the amount of particulate ingredients, and a water volume sensor (25) can be used to measure the volume of liquid component added to the mix. When a known maximum volume of liquid component is added a computer can operate to prevent further liquid being added, unless it is purposely overridden. The computer can be used to print a delivery docket via a printer with all the specified concrete data and all the measured parameters, and can also be used to transfer information to a main computer at a concrete depot, so the information can be used as a record of the concrete delivered and also as data for account processing.
REFERENCES:
patent: 2089604 (1937-08-01), Hagy
patent: 3731909 (1973-05-01), Johnson
patent: 4008093 (1977-02-01), Kitsuda et al.
patent: 4097925 (1978-06-01), Butler, Jr.
patent: 4900154 (1990-02-01), Waitzinger et al.
Briedis Hussein
Zandberg Henry
Boral Resources (VIC) PTY Limited
Cooley Charles E.
Feeney William L.
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