Patent ID: 7040939

Claim:
A system for simultaneously generating two jet streams from two respective jet units from a single engine-driven driveshaft to provide a propulsive thrust for a jet boat comprising: a) a water intake attachable to the hull of said jet boat, said intake having a first channel formed therein for delivering water to a respective one of said jet units, and a second channel for delivering water to a respective other of said jet units; b) a transmission system operatively coupled to the driveshaft of the engine of said jet boat, said transmission system being operatively coupled to respective ones of said impellers of said jet units such that said jet units are simultaneously driven by the drive shaft of said engine, said transmission comprising: i) a central sprocket having a coupling formed thereon for connecting with said driveshaft; ii) a first sprocket being operatively coupled to an impeller of a respective one of said jet units, said first sprocket having a chain operatively coupled to said central pulley; and iii) a second sprocket being operatively coupled to said other impeller of said jet units, said second pulley having a chain operatively coupled to said central pulley; wherein said central sprocket, said first sprocket, and said second sprocket are operatively coupled to one another by a single chain.