Patent ID: 6193569
Filing Date: 2001-02-27
Classification: B63H,Y02T

Abstract:
A water jet propulsion unit comprising:an intake section; an axial flow pump section; a drive section, all in smooth communication with one another; said drive section containing a drive transmission carrier and pressure control device; said pressure control device being mounted on said drive transmission carrier, downstream of said drive transmission carrier; said drive transmission carrier consisting of a removable upstream mounted cone shaped bearing carrier, gears and downstream mounted cover plate; said pump section containing a single pair of counter-rotating axial flow impellers; said impellers being each mounted on separate concentric counter-rotating shafts extending forwardly from said drive transmission carrier; said drive transmission carrier being located in said drive section by hydrodynamically shaped support vanes downstream of said axial flow impellers; one of said support vanes having a vertically aligned hole to permit a vertically aligned input drive shaft to connect to said drive transmission carrier; said drive section being detachable from said pump section and said intake section; said pressure control device permitting the unit to operate in a low pressure high mass mode; said impellers being removable without disassembly of said drive section; said propulsion unit being mountable in either a stern-drive or outboard configuration.