US 11,813,771 B2
Portable cement mixing apparatus with precision controls
John Igo, Edmond, OK (US); Leland Graves, Nichols Hills, OK (US); and Wesley Zimmerman, Norman, OK (US)
Assigned to Stone Table, LLC, Oklahoma City, OK (US)
Filed by STONE TABLE, LLC, Oklahoma City, OK (US)
Filed on May 20, 2020, as Appl. No. 16/879,651.
Application 16/879,651 is a continuation of application No. 14/517,085, filed on Oct. 17, 2014, granted, now 10,695,950.
Prior Publication US 2020/0276731 A1, Sep. 3, 2020
Int. Cl. B28C 7/04 (2006.01); B28C 7/02 (2006.01); B28C 9/04 (2006.01)
CPC B28C 7/02 (2013.01) [B28C 7/0422 (2013.01); B28C 7/0436 (2013.01); B28C 9/0454 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus for producing a cementitious slurry at a remote work site from a plurality of ingredients comprising:
a platform;
at least one storage container for ingredients of a cementitious slurry supported by said platform;
a mixing chamber suitable for receiving an ingredient from the storage container, said mixing chamber having at least three feet;
a strain gauge load cell positioned between each of said feet of said mixing chamber and said platform, each strain gauge load cell is configured to communicate weight data and said strain gauge load cells are suitable for weighing the amount of each individual ingredient delivered to the mixing chamber in real time;
at least one conveyor suitable to convey cementitious slurry ingredients from the storage container to the mixing chamber;
a water tank supported by said platform;
a pump within said water tank;
a hose having a first end attached to said pump provides fluid communication between said water tank and said mixing chamber;
a nozzle attached to a second end of said hose conveys water into said mixing chamber;
at least one valve carried by said hose, said valve located between said pump and said nozzle; and,
an operating system configured to receive weight data from each of said strain gauge load cells and to cause, control and monitor the rate of conveyance of the ingredients from the storage container into the mixing chamber and to end the conveyance of the ingredients from the storage container by accurately monitoring the weight of the ingredients in the mixing chamber as reported by said strain gauge load cells to said operating system, wherein said operating system is configured to monitor the rate of conveyance of water from the water tank into the mixing chamber and the weight of the water in the mixing chamber as reported by the strain gauge load cell and said operating system is also configured to account for the weight of water emitted from the nozzle but not yet in the mixing chamber.