Portable cement mixing apparatus
OwnerStephen J. Heller, Joseph Kreuser +1inventors
InventorsStephen J. Heller, Joseph Kreuser, James Bauer
Life of this patent
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Abstract
A system for forming a cementitous slurry comprising at least water or other liquid and at least one flowable particulate mass such as sand or cement has computerized control of loading the ingredients into a mixing chamber. The mixing chamber has a scale that provides a signal indicating the current weight of the mixing chamber. The computer monitors the weight of the mixing chamber as these ingredients are individually loaded into the mixing chamber. When the desired weight of a particular ingredient has been loaded, the computer halts the delivery of that ingredient. Ingredients are loaded first at a relatively high rate, and then as the desired weight of material in the mixing chamber approaches, the rate slows.
Claims10
A system for delivering preselected weights of a liquid and at least a first particulate mass material to a mixing chamber, comprising:
- a) sources for the liquid and the particulate mass;
- b) at least one mixing chamber;
- c) first and second delivery devices for sequentially and separately transporting the liquid and the at least one particulate mass material to the mixing chamber responsive to first and second delivery control signals, each delivery control signal having second and third values causing the associated delivery device to transport the associated material to the mixing chamber at respectively fast and slow speeds, and a first value stopping the associated delivery device from transporting the associated material to the mixing chamber;
- d) a scale supporting at least a portion of the mixing chamber, and providing a mixer weight signal indicating the current weight in the mixing chamber;
- and
- e) a controller receiving a liquid weight signal encoding the preselected liquid weight, a first particulate mass weight signal encoding the preselected particulate mass weight, and the mixer weight signal from the scale, and
- i) recording the current weight of the mixing chamber as the first starting mixer weight, and then providing the first delivery signal with one of the second and third values thereof to the first delivery device and periodically recording the current weight of the mixing chamber, and responsive to the current mixer weight less the first starting mixer weight equaling or exceeding one of the preselected liquid and particulate mass weights, providing the first delivery signal with the first value thereof to the first delivery device, and
- ii) again recording the current weight of the mixing chamber as the second starting mixer weight, and providing the second delivery signal with one of the second and third values thereof to the second delivery device and periodically recording the current weight of the mixing chamber, and responsive to the current mixer weight less the second starting mixer weight equaling or exceeding the other of the preselected liquid and particulate mass weights, providing the second delivery signal with the first value thereof to the second delivery device.
Dependencies are inferred from the claim text.