The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2003
Filed:
Aug. 12, 2002
Alan R. Burns, North Fremantla, AU;
Pursuit Dynamics plc, Royston, GB;
Abstract
A propulsion system ( ) having various applications one of which is as a marine drive system for watercraft. The propulsion system ( ) comprises a flow passage ( ) having an intake ( ) for communicating with a source of working fluid such as seawater and an outlet ( ). A mixing zone ( ) is disposed within the flow passage ( ) between the intake ( ) and the outlet ( ). An injection means including annular nozzle ( ) is provided for injecting a hot compressible driving fluid ( ) such as steam into the mixing zone ( ) in a flow direction towards the outlet ( ). The arrangement is such that the interaction between the steam and the seawater in the mixing zone ( ) develops a pressure reduction in the mixing zone ( ) to cause seawater to be drawn from the source into the mixing zone ( ) and propelled towards the outlet ( ). A marine drive unit incorporating the propulsion system is also described and claimed, as well as other aspects related to the propulsion system.