Boat propulsion unit

Details Boat propulsion unit Boat propulsion unit

2009-05-19

2011-11-01

Olson, Lars A (Department: 3617)

Marine propulsion

Screw propeller

Having transmission

C440S080000

Reexamination Certificate

active

08047885

ABSTRACT:
A boat propulsion unit has a construction that prevents a structure near a drive shaft from becoming complicated and increased in size. The boat propulsion unit preferably in the form of an outboard motor includes a front propeller that is rotated together with a front propeller drive shaft during both forward travel and reverse travel of the boat, a rear propeller that is rotated together with a rear propeller drive shaft in an opposite direction of the front propeller during both of the forward travel and the reverse travel of the boat, and a forward-reverse drive that is arranged on an axis of the front propeller drive shaft and the rear propeller drive shaft, and that can be switched between a direction in which the front propeller drive shaft and the rear propeller drive shaft are rotated during the forward travel of the boat and a direction in which the front propeller drive shaft and the rear propeller drive shaft are rotated during the reverse travel of the boat.

REFERENCES:
patent: 5601464 (1997-02-01), Ogino et al.
patent: 6623320 (2003-09-01), Hedlund
patent: 2008/0233815 (2008-09-01), Nakamura et al.
patent: 2007/007707 (2007-01-01), 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-4311215