Patent ID: 9346522
Filing Date: 2016-05-24
CPC Classification: B63B,B63H

Claim Text:
1. A frame of a water jet propulsion unit arranged to be installed and sealed into an installation opening of a boat, the water-jet propulsion unit including an impeller and the boat having a counter-sealing surface to which the frame is attached, the frame comprising: a flow channel to guide water to the impeller, the flow channel having a top with a maintenance opening, the maintenance opening being positioned to permit servicing the impeller; a first sealing surface to form a first closed loop to attach the water-jet propulsion unit tightly to the counter-sealing surface of the boat; and a second sealing surface to form a second closed loop arranged to attach the water-jet propulsion unit to the boat, wherein the first and second closed loops permit the maintenance opening of the frame to be alternatively locatable, respectively, outside or inside the stern of the boat in dependence on alternative configurations of the installation opening of the boat.