Patent ID: 7544109
Filing Date: 2009-06-09
Classification: B63H

Abstract:
1. A propelling system for a boat having a stern, the propelling system comprising: a housing for mounting to the stern of the boat, the housing having a receiving chamber inside and a waterway at a bottom side thereof; a propeller rotatably disposed in the waterway of the housing, the propeller having a plurality of blades; a driving device mounted in the receiving chamber of the housing and having a driving member and a linking member pivotally coupled to the driving member; a guide ring connected to a linking member of the driving device and located in the waterway of the housing such that the guide ring surrounds the blades of the propeller and is pivotable relative to the propeller; wherein the housing includes two sidewalls, each of which has a rear end thereof higher in elevation than a front end thereof; the waterway of the housing is defined between the two sidewalls of the housing; and wherein each sidewall of the housing has a first section slantingly and backwardly extending from the front end thereof, and a second section integrally connected with the first section and horizontally extending from the first section of the rear end thereof.