Underwater excavation apparatus
AssigneeRotech Holdings Limited
InventorsKenneth Roderick Stewart, Donald Stewart
Life of this patent
Estimating the term…
Abstract
There is disclosed an excavation apparatus (5), such as an underwater excavation apparatus, having means for producing, in use, at least one vortex, spiral or turbulent flow in a laminar flow of fluid, e.g. water. The excavation apparatus (5) comprises a rotor (10) having a rotor rotation axis (A), wherein, in use, flow of fluid past or across the rotor (10) is at a first angle (a) from the axis of rotation (A). The excavation apparatus (5) comprises the rotor (5) and means or an arrangement for dampening reactive torque on the apparatus (5) caused by rotation of the rotor (10), in use. The turbulent flow is provided within, such as within a (transverse) cross-section, of the laminar flow.
Claims18
An excavation apparatus, comprising:
- at least one rotor;
- at least one stator comprising stator blades, the stator blades comprising a plurality of larger primary stator blades and a plurality of smaller secondary or splitter blades provided between adjacent pairs of the larger primary stator blades;
- and
- a torque dampening arrangement for dampening reactive torque caused by rotation of the rotor, the torque dampening arrangement comprising the stator blades.
An excavation apparatus comprising:
- a housing comprising an inlet and an outlet;
- a rotor comprising a first body and a plurality of blades disposed on the first body;
- a stator comprising a second body and a plurality of further blades disposed on the second body;
- and
- wherein the further blades comprise a plurality of larger primary stator blades and smaller secondary or splitter blades provided between adjacent pairs of the plurality of larger primary stator blades.
Dependencies are inferred from the claim text.