Twin impeller drive for jet pump

Marine propulsion – Jet drive

Patent

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Details

440 79, 440 80, B63H 1100

Patent

active

056182139

ABSTRACT:
A jet propulsion unit for a watercraft that employs a pair of counter rotating impellers that are disposed immediately adjacent each other so that the need for straightening vanes is eliminated. The impellers are driven by a bevel gear transmission to rotate in opposite directions, which bevel gear transmission is contained within the jet propulsion unit outer housing but forwardly of the flow path of water therethrough. This bevel gear transmission is driven by a single input shaft through a flexible coupling.

REFERENCES:
patent: 3044260 (1961-01-01), Hamilton
patent: 3601989 (1971-08-01), Austin

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