Personal watercraft with V-type engine
AssigneeYamah aHatsudoki Kabushiki Kaisha
InventorsNoboru Kobayashi, Yoshiyuki Kaneko
Life of this patent
Estimating the term…
Abstract
A number of embodiments of small personal watercraft each embodying a V-type engine. Arrangements are shown wherein the engine is mounted either with its output shaft extending in a longitudinal direction or in a vertical direction. Various placements for the engine are disclosed and in all embodiments a straddle-type seat is incorporated for accommodating at least the rider and in some instances additional passengers. Various types of exhaust systems including watertrap devices are incorporated and the watercraft is provided with a pair of fuel tanks in several embodiments that are disposed in longitudinal alignment with the seat and on opposite sides thereof for improving balance.
Claims100
A personal type of watercraft having a hull, said hull providing a straddle-type seat adapted to carry at least one rider seated thereon in straddle fashion, a propulsion device for propelling said watercraft, and an internal combustion engine carried by said hull and having at least a pair of cylinder banks disposed at a V-angle to each other containing pistons driving a crankshaft and which crankshaft drives said propulsion device, said engine being mounted in said hull so that said crankshaft rotates about a vertically disposed axis.
A personal type of watercraft having a hull, said hull providing a straddle-type seat adapted to carry at least one rider seated thereon in straddle fashion, a propulsion device for propelling said watercraft, an internal combustion engine carried by said hull and driving said propulsion device, a pair of fuel tanks carried by said hull on opposite sides of a longitudinal center line thereof, and means for delivering fuel from said fuel tanks to said engine for its operation.
A personal type of watercraft having a hull, said hull providing a straddle-type seat adapted to carry at least one rider seated thereon in straddle fashion, a propulsion device for propelling said watercraft, an internal combustion engine carried by said hull and driving said propulsion device, and a pair of passenger side seats each disposed on a respective side of said straddle-type seat at the rear thereof and at a substantially different level so that passengers seated on said side seats will be seated at a different height than an operator seated on said straddle-type seat.
A watercraft comprised of a hull defining a rider's area having a raised central seat for accommodating at least one rider seated thereon in straddle fashion, a pair of foot areas on opposite sides of said seat on which a rider may place his feet, and at least one storage compartment disposed beneath at least one of said foot areas.
A watercraft comprised of a hull defining a tunnel at the rear end thereof on its under side, a rider's area disposed above said tunnel in the upper portion of said hull, a straddle-type seat positioned centrally of said rider's area and adapted to accommodate at least one rider in straddle fashion, a pair of foot areas defined at the lower portion of said rider's area for receiving the feet of a rider seated upon said seat, a jet propulsion unit disposed at least in part in said tunnel and having an impeller shaft, said tunnel being defined at the forward end thereof by a first bulkhead, an engine compartment formed forwardly of said tunnel and defined at the rear end thereof by a second bulkhead, an engine in said engine compartment and having an output shaft, a drive shaft coupled at one end to said engine output shaft and at the other end to said impeller shaft for driving said impeller shaft from said engine output shaft, and first and second bearings supported by said first and said second bulkheads, respectively, for journalling said drive shaft.
A watercraft comprised of a hull defining a rider's area at the rear thereof, a steering control positioned at a forward portion of said rider's area for steering of said watercraft by a rider in said rider's area, a deck extending forwardly from said steering control and configured to accommodate a lying passenger, and cushioning means associated with said steering control on which said lying passenger may rest his head.
Dependencies are inferred from the claim text.