Improvements In and Relating To Underwater Excavation Apparatus
OwnerDonald STEWART, Kenneth Roderick STEWARTinventors
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Abstract
An excavation apparatus (5), such as an underwater excavation apparatus and/or a controlled flow excavation apparatus, comprises a rotor (10) comprising a plurality of first rotor blades (12) and a plurality of second rotor blades (14). The second rotor blades are provided between adjacent pairs of first rotor blades. The first rotor blades (12) define a plurality of primary rotor blades of the rotor (10). The second rotor blades (14) define a plurality of secondary, splitter, rotor blades of the rotor (10).
Claims67
An underwater excavation apparatus, comprising:
- a housing comprising:
- at least one inlet;
- and
- an outlet;
- a rotor disposed in the housing;
- a stator disposed in the housing;
- wherein the rotor comprises a plurality of first rotor blades and a plurality of second rotor blades,
- wherein the first rotor blades comprise or define primary rotor blades of the rotor,
- wherein the second rotor blades are each provided between a pair of adjacent first rotor blades and comprise secondary, splitter, rotor blades the rotor, and
- wherein a leading edge of one or more of the second rotor blades commences part way along a length of an adjacent first rotor blade.
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wherein the apparatus is adapted to provide and/or direct a flow of water at a pressure of 200 KPa to 400 KPa and/or a volume flow of 0.5 m3/s to 4 m3/s.
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Dependencies are inferred from the claim text.