Marine propulsion – Jet drive – Direction control for fluid jet
Patent
1998-02-23
2000-02-15
Basinger, Sherman
Marine propulsion
Jet drive
Direction control for fluid jet
440 42, 440 43, 440 47, B63H 11103, B63H 1111
Patent
active
060246146
ABSTRACT:
The instant invention describes an advanced marine propulsor that has a rotor that is, at least in its majority, enclosed by structure where the rotor receives water over at least a majority of its lower portions and gas over at least part of its upper portions. It is possible to delete the gas flow by use of one or more valves so that an approximate doubling of water flow rate occurs which is valuable as a thrust enhancer for low and mid-range marine vehicle speed operation. It is also possible to operate the rotor with water directed mainly to its lower portions but with little or no gas directed to its upper portions thus forming a partial vacuum over the upper portions of the rotor vanes. When used, a water directing valve that directs water to the rotor vanes preferably has a curvilinear water contacting surface so that water will adhere to and follow that surface. Use of port and starboard water directing valves allows varying levels of water flow to port and starboard sides of the rotor. The inherent structural strength of the rotor can be increased by a rotor ring that can be inset into a recess in the adjacent housing. A steering and reversing system for marine propulsors is also proposed. It includes a steering rudder that is in mechanical communication with reversing guide vanes or nozzles such that movement of the steering rudder causes a common movement of the reversing guide vanes or nozzles. A reversing gate is used to block discharge flow when in reverse. A water deflecting flap is provided to deflect water from hitting the reversing guide vanes or nozzles when operating in a high speed ahead mode.
REFERENCES:
patent: 3943876 (1976-03-01), Kiekhaefer
patent: 4371350 (1983-02-01), Kruppa et al.
patent: 4929200 (1990-05-01), Guezou et al.
patent: 4941423 (1990-07-01), Van Tassel
patent: 5720636 (1998-02-01), Burg
Basinger Sherman
Van Der Wall Robert J.
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