Boat propulsion unit

Details Boat propulsion unit Boat propulsion unit

2007-07-24

2007-07-24

Olson, Lars A. (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

C440S038000

Reexamination Certificate

active

11378138

ABSTRACT:
A propulsion unit for a boat has a cooling water intake structure through which entry of cooling water is obstructed when the boat is towed while the impeller is not turned, and through which sufficient cooling water enters when the impeller is turned. The propulsion unit includes an impeller, plural stationary blades provided on the downstream side of the impeller, and a cooling water intake structure. The intake structure is disposed between adjacent first and second stationary blades, on the side of the first stationary blade relative to a bisecting line between the two stationary blades. Hydraulic pressure on the side of the first stationary blade, relative to the bisecting line, is lowered by guide action of the impeller, and hydraulic pressure on the side of the second stationary blade relative to the bisecting line is raised, respectively, when the boat is towed while the impeller is stopped.

REFERENCES:
patent: 5472359 (1995-12-01), Allbright et al.
patent: 5788547 (1998-08-01), Ozawa et al.
patent: 6036556 (2000-03-01), Baker et al.
patent: 6171158 (2001-01-01), Henmi et al.
patent: 6659816 (2003-12-01), Fuse
patent: 6881109 (2005-04-01), Matsuda et al.
patent: 2003-246298 (2003-09-01), None

Affiliated with

Also associated with

Rating

Boat propulsion unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Boat propulsion unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boat propulsion unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3768935