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US 11,660,780 B2Granted
Mixing apparatus and method for preparing mortar
AssigneeRigid Mixers Limited
InventorConor McAlinden
Life of this patent
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AssigneeRigid Mixers Limited
InventorConor McAlinden
Estimating the term…
A mixing apparatus for preparing mortar has a screw conveyor for conveying dry material, such as a mixture of sand and cement, from a storage vessel to a mixing chamber. The mixing chamber has an inlet end, adapted to receive dry material from an outlet end of the screw conveyor, an outlet end for dispensing wet mortar, and a water feed between the inlet and outlet ends for delivering a metered flow or quantity of water into the mixing chamber. A mixing device within the mixing chamber mixes the dry material and water and controls passage of material from the inlet to the outlet end. The outlet end is located above said inlet end so the dry material falls under gravity from the outlet end into the mixing chamber, maintaining separation between the dry material in the screw conveyor and the wet material in the mixing chamber.
A mixing apparatus for preparing wet mortar from water and dry material, such as a mixture of sand and cement, the mixing apparatus comprising:
A transportable apparatus for on-site preparation of batches of mortar comprising a silo for containing a dry material, such as a mixture of sand and cement, said silo having upper and lower ends, a mixing apparatus for preparing mortar comprising a screw conveyor extending from a lower end of said silo for conveying dry material from the silo to a mixing chamber, said mixing chamber having an inlet end, for receiving dry material from an outlet end of said screw conveyor, an outlet end for dispensing wet material, and a water feed intermediate said inlet and outlet ends for delivering a metered flow or quantity of water into the mixing chamber, a mixing device being provided within said mixing chamber for mixing said dry material and water and for controlling the passage of material from said inlet to said outlet end of the mixing chamber, wherein said outlet end of said screw conveyor is located above said inlet end of said mixing chamber such that dry material falls from the outlet end of the screw conveyor into the mixing chamber under gravity, and wherein the mixing device comprises a mixing auger comprising a rotatably mounted shaft having a plurality of radially extending mixing blades mounted thereon, wherein said blades on at least an upper region of said mixing auger are angled to convey material in a downwards direction wherein the blades on a lower region of the mixing auger are angled to convey material in an upwards direction.
A method for on-site preparation of batches of mortar comprising conveying dry material, such as a mixture of sand and cement, from a silo to a mixing chamber in a screw conveyor having a screw rotatably driven by a first motor, passing said dry material from an outlet end of said screw conveyor into an inlet end of said mixing chamber under gravity, passing water into said mixing chamber and agitating and conveying the mixture of dry material and water through the mixing chamber by rotation of a mixing auger within the mixing chamber rotatably driven by a second motor, to deliver wet mixed material from an outlet end of said mixing chamber, including controlling the flow rate of material through the outlet end of the mixing chamber by controlling the size of a discharge opening at said outlet end of the mixing chamber, wherein said mixing auger comprises mixing blades mounted to a shaft, where at least some of the mixing blades are mounted at an angle or pitch to the shaft such that the leading edge of each of these blades is lower than the trailing edge thereof, and at least some other of the mixing blades are mounted to the shaft at an angle or pitch, such that the leading edge of each of these blades is higher than the trailing edge thereof.
A mixing apparatus comprising a conveying chamber and a mixing chamber, said conveying chamber being provided with a powered conveying device driven by a first drive device for conveying dry material between an inlet end communicating with a storage vessel and an outlet end communicating with an inlet end of the mixing chamber, said mixing chamber being provided with a powered mixing device driven by a second drive device and a water supply device for supplying water to the mixing chamber, whereby said mixing device is arranged to mix said dry material with said water and control the passage of said mixture between said inlet end of the mixing chamber and an outlet end thereof, a control device being provided for independently controlling said first and second drive devices whereby the flow rate of dry material through the screw conveyor and the flow of wet material through the mixing chamber can be controlled independently, including a flow control device for controlling the flow rate of material through the outlet end of the mixing chamber, wherein the mixing device comprises a mixing auger comprising a rotatably mounted shaft having a plurality of radially extending mixing blades mounted thereon, wherein said blades on at least an upper region of said mixing auger are angled to convey material in a downwards direction, and wherein the blades on a lower region of the mixing auger are angled to convey material in an upwards direction.
Dependencies are inferred from the claim text.