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US 12,331,756 B2Granted
Pumps configured for use with viscous materials containing aggregate
OwnerBehrokh Khoshnevisinventor
Life of this patent
Estimating the term…
Abstract
A pump that includes a rotatable shaft, a material driving apparatus mounted to the rotatable shaft, as well as a conduit in which the rotatable shaft as well as the material driving apparatus are contained, wherein the pump is capable of reliably pumping viscous material through and out of the conduit.
Claims16
A hollow-core auger pump comprising:
- a rotatable shaft;
- a hollow-core auger mounted to the rotatable shaft, the hollow-core auger including one or more helical hollow-core blades, wherein each helical hollow-core blade extends between a first mounting element and a second mounting element, the first mounting element being attached to a distal end of the rotatable shaft, wherein the one or more helical hollow-core blades do not include an axial core and therefore define a central open space;
- and
- a conduit in which the rotatable shaft and the hollow-core auger are contained;
- wherein the hollow-core auger is configured to be angularly rotated about a longitudinal axis of the rotatable shaft and linearly reciprocated along an axial direction of the conduit in a manner in which the hollow-core auger is alternately moved in a first direction along the conduit and in a second, opposite direction along the conduit;
- wherein the hollow-core auger pump is capable of reliably pumping viscous material through and out of the conduit.
3 more elements
A hybrid auger-piston pump comprising:
- a rotatable shaft;
- a hybrid auger-piston mounted to the rotatable shaft, the hybrid auger-piston including an auger blade having a leading edge, a trailing edge, and an integrated check valve associated with the trailing edge, wherein the integrated check valve includes a pivotable flap that can pivot between an open orientation in which a space between the leading edge and the trailing edge of the auger blade is open and a closed orientation in which the space between the leading edge and the trailing edge of the auger blade is closed;
- and
- a conduit in which the rotatable shaft and the hybrid auger-piston are contained;
- wherein the hybrid auger-piston is configured to be angularly rotated about a longitudinal axis of the rotatable shaft and linearly reciprocated along an axial direction of the conduit in a manner in which the hybrid auger-piston is alternately moved in a first direction along the conduit and in a second, opposite direction along the conduit, wherein the integrated check valve opens when the hybrid auger-piston is moved in the first direction and closes when the hybrid auger-piston is moved in the second direction so that the hybrid auger-piston alternately functions as a conventional auger and a conventional piston;
- wherein the hybrid auger-piston pump is capable of reliably pumping viscous material through and out of the conduit.
3 more elements
A multi-valve piston pump comprising:
- a rotatable shaft;
- a multi-valve piston mounted to the rotatable shaft, the multi-valve piston being formed by multiple check valves, each check valve being configured as a pivotable partially circular flap, wherein each check valve can pivot between an open orientation in which material can pass through the check valve and a closed orientation in which material cannot pass through the check valve;
- and
- a conduit in which the rotatable shaft and the multi-valve piston are contained;
- wherein the multi-valve piston pump is capable of reliably pumping viscous material through and out of the conduit.
2 more elements
Dependencies are inferred from the claim text.