Jet boat pump

Details Jet boat pump Jet boat pump

1974-08-01

1976-02-03

Blix, Trygve M.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural distributing means immediately upstream of runner

60221, 415204, B63H 1100

Patent

active

039358330

ABSTRACT:
A centrifugal pump for a boat which is used to propel the boat by a jet of water created by the pump. The pump includes a housing which is mounted exterior to the hull. A drive shaft and an impeller are mounted to rotate within the housing. The drive shaft extends through the hull of the boat and may be coupled directly to a gas turbine engine or other power generating device. The impeller is of the double suction type and includes ports for equalizing pressures on either side of the impeller at the suction positions thereof. The housing provides a double volute to receive the effluent from the impeller and direct it aft to a nozzle. Nozzle mechanisms are disclosed which provide easy steering and boat trim control under high thrust loads. A thrust reversal system is employed which directs the jet of water forward for stopping and reversing. A new scoop design is also included which reduces drag and yet provides proper flow to the pump.

REFERENCES:
patent: 3082732 (1963-03-01), Stallman
patent: 3757728 (1973-09-01), Rhoda
patent: 3805731 (1974-04-01), Furst et al.
patent: 3809005 (1974-05-01), Rodler, Jr.

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