Marine propulsion – Jet drive
Reexamination Certificate
2006-05-16
2006-05-16
Avila, Stephen (Department: 3617)
Marine propulsion
Jet drive
Reexamination Certificate
active
07044816
ABSTRACT:
A watercraft is fitted with any one or combination of a retractable rudder fin and filter systems and improved jet drive systems. A retractable rudder-fin and filter system includes an extendable/retractable blade and a mechanism for extending the blade a variable amount from below a watercraft upon sufficient reduction or cutting-off of power from the drive system. An improved jet drive system is powered by an engine that is supported within a take-out jet structure. The take-out jet structure has an inner housing in which the engine block and jet pump are supported for operation, an outer housing fixed or unitary with the watercraft hull and a suspension structure for suspending the inner housing within the outer housing. The suspension structure has tubing that is pressurized with a gas or fluid. The engine may have a camshaft sprocket or pulley that is configured to be directly connected to drive the impeller or rotor at half-speed drive relative to the engine crankshaft.
REFERENCES:
patent: 3003300 (1961-10-01), Jepson
patent: 5100350 (1992-03-01), Buzzi
patent: 5356319 (1994-10-01), Parker
patent: 5873336 (1999-02-01), Uchida
patent: 6302047 (2001-10-01), Cannon
patent: 2003/0082964 (2003-05-01), Simner
Avila Stephen
Foley & Lardner LLP
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