Class 440/89C - Jackets for pipe, exhaust manifold or expansion chamber

Subclass of Class 440 - Marine propulsion
No. of patents: 40
Last issue date: 12/15/2009

Number	Title	Issue Date
7632162	Personal watercraft with engine having exhaust collecting system In a personal watercraft equipped with a multi-cylinder engine including an exhaust collecting system configured to discharge an exhaust gas from the engine, the exhaust collecting system comprising a plurality of exhaust passages respectively corresponding to a plu...	12/15/2009
7628663	Marine engine exhaust system with cooling arrangement A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has ...	12/08/2009
7517266	Method and device for discharging exhaust gases of internal combustion engine of boats into the water surrounding the boats A method for the efficiency-increasing discharging of exhaust gases of internal combustion engines of boats into the water surrounding the boats is disclosed. The exhaust gases and a flow of water drawn from the surrounding water are mixed together in a low air pres...	04/14/2009
7390232	Exhaust system for a marine engine An exhaust system for a marine propulsion system includes first through fifth exhaust conduit members, including a pair of serially connected marine exhaust elbows laterally spanning the engine. ...	06/24/2008
7367857	Exhaust structure for small watercraft To provide an exhaust structure for a small watercraft that can cool exhaust gas, reduce the size and weight, and thereby cost of a backflow prevention chamber. An exhaust structure for a small watercraft is configured to be able to cool exhaust gas in the course of...	05/06/2008
7329162	Cooling system for a marine propulsion device A cooling system for a marine vessel is configured to allow all cooling water to flow out of the cooling circuit naturally and under the influence of gravity when the marine vessel is removed from the body of water. All conduits of the cooling circuit are sloped dow...	02/12/2008
7217168	Engine exhaust system An engine exhaust system has an exhaust gas passage and a coolant passage. The coolant passage surrounds at least a portion of the exhaust passage. The system is also equipped with an exhaust conduit, which mixes exhaust gases and coolant and then releases the mixtu...	05/15/2007
7065961	Exhaust system with an integral moisture trap A moisture trap is formed as an integral part of the wall of an exhaust conduit. Tapered surfaces can be provided to direct condensate downwardly and into a reservoir of the moisture trap where the moisture is retained until the temperature of the exhaust system rea...	06/27/2006
6929520	Cooling method for a marine propulsion system A method for cooling a marine propulsion system directs a portion of a recirculating stream of cooling water to a first port of an exhaust manifold so that a cooling jacket of the exhaust manifold can be maintained in a filled condition. Water flows upwardly through...	08/16/2005
6913499	Exhaust passage of small watercraft, method of connecting exhaust pipe, and water muffler An exhaust passage configured to discharge an exhaust gas from an engine of a small watercraft, comprises at least a first exhaust pipe, a second exhaust pipe connected to the first exhaust pipe, and a connecting structure configured to connect the first exhaust pip...	07/05/2005
6890228	Outboard motor equipped with water-cooled engine An outboard motor equipped with a water-cooled engine includes an exhaust manifold cooling water jacket for cooling an exhaust manifold for discharging to the outside exhaust gas from a combustion chamber, the exhaust manifold cooling water jacket being supplied wit...	05/10/2005
6800004	Marine exhaust cooling system An exhaust system for a marine engine uses an orifice to distribute liquid coolant flow between two alternative and parallel paths. One coolant path passes through a generally horizontal portion of an exhaust elbow and the other coolant path passes through the orifi...	10/05/2004
6769944	Exhaust and drain structure for vessels To effectively cool a water muffler. Exhaust gas from an engine is discharged through an exhaust pipe having a water jacket into a water muffler together with water passed through the water jacket. A water outlet port of the exhaust pipe is directed toward an upper ...	08/03/2004
6659820	Jet-propulsion watercraft Disclosed is a jet-propulsion watercraft capable of maintaining cooling capability in an exhaust passage even when one cooling water passage is clogged with substances. The jet-propulsion watercraft comprises: an engine having a cooling water passage; an ...	12/09/2003
6612885	Exhaust system for watercraft An internal combustion engine includes an exhaust system. Additionally, the engine includes a secondary air injection system that injects air into the exhaust system to burn un-burnt fuel that may be entrained in the exhaust gases. The secondary air injec...	09/02/2003
6582263	Marine exhaust elbow structure with enhanced water drain capability An exhaust elbow for a marine propulsion system is provided with a stainless steel tube within a water outlet opening to assure that a drain opening remains open even when the exhaust elbow is exposed to a corrosive environment. Since cast iron tends to e...	06/24/2003
6511355	Catalyst exhaust system A catalyst exhaust system includes a catalyst housing having an inlet end, an outlet end, and a passage therethough. The outlet end includes a valve seat, and a water jacket surrounds the catalyst housing. A valve housing is in flow communication with the...	01/28/2003
6027384	Four-cycle engine for a small jet boat A four-cycle engine is provided which is suitable for use in a vehicle or an apparatus such as a small jet boat to be operated on the premise that it often overturns, and which is simple in structure. An oil pan 22 is disposed below the bottom of a crankc...	02/22/2000
5975033	Water-cooled engine Each of combustion chambers 37 in a cylinder head 8 and an opening 45 in a cylinder block/cylinder head coupling surface 36 are connected to each other by a pair of exhaust passages 42. A cooling water passage 94 is defined within a partition wall 44 part...	11/02/1999
5937802	Engine cooling system A cooling system for an internal combustion engine is provided with coolant paths through the cylinder block and cylinder head which are connected in serial fluid communication with each other. In parallel with the cooling path through the cylinder head, ...	08/17/1999
5846102	Four-cycle engine for a small jet boat A four-cycle engine is provided which is suitable for use in a vehicle or an apparatus such as a small jet boat to be operated on the premise that it often overturns, and which is simple in structure. An oil pan 22 is disposed below the bottom of a crankc...	12/08/1998
5803036	Engine for outboard motor An outboard motor having an upper unit containing an internal combustion engine and a lower unit containing an exhaust guide is disclosed. The engine has a vertically oriented crankshaft having an end extending from the bottom end of the engine. A flywhee...	09/08/1998
5797775	Engine control system for a watercraft A watercraft engine control system for controlling the temperature in the exhaust system to protect against potentially dangerous situations. If the exhaust temperature is sensed to be unduly high, a protective action is initiated. This protective action ...	08/25/1998
5746054	Method and apparatus for tuned pipe water injection In an exhaust expansion chamber or tuned pipe of a two-cycle engine in a watercraft, variable amounts of water are injected, thus cooling the temperature within the expansion chamber and matching the sonic wave speed with that of the correct rpm of the mo...	05/05/1998
5746270	Heat exchanger for marine engine cooling system A heat exchanger assembly is provided for a marine propulsion system having a closed loop cooling system. The heat exchanger body encloses a series of tubes carrying sea water which removes heat from the engine coolant. The heat exchanger includes an inte...	05/05/1998
5740670	Water jacketed exhaust pipe for marine exhaust systems A water jacketed exhaust pipe comprising an inner liner, an outer shell, and a spray ring. The inner liner includes an internally tapered section which clips the turbulence that occurs along the inner walls of the liner. As a result, fluid expelled from t...	04/21/1998
5544631	Cylinder head construction for outboard motor with four-stroke engine Disclosed herein is a cylinder head comprising a one-piece casting including a cylinder block mounting surface adapted to mate with a mounting surface on a cylinder block and including vertically spaced first and second recesses adapted to respectively fo...	08/13/1996
5251439	Exhaust device for small sized boat engine A small watercraft embodying an improved exhaust system that is substantially completely watercooled by a cooling jacket. The exhaust system includes an elastic joint that is also completely surrounded by the cooling jacket so as to insure adequate coolin...	10/12/1993
5036804	Cooling system for four stroke outboard motor A liquid cooling system for a four-cycle internal combustion engine utilized as a power plant for an outboard motor. The cooling system is designed so that coolant is first delivered to cool an exhaust manifold in the cylinder block, then the exhaust port...	08/06/1991
4989409	Exhaust device for small sized boat engine A small watercraft embodying an improved exhaust system that is substantially completely watercooled by a cooling jacket. The exhaust system includes an elastic joint that is also completely surrounded by the cooling jacket so as to insure adequate coolin...	02/05/1991
4927390	Gas exhaustion device for inboard/outboard engine An inboard/outboard drive arrangement and specifically an improved exhaust joint therefor wherein at least one of the rigid conduits of the exhaust system is provided with a projection to engage and restrain a hose clamp which may be released and inadvert...	05/22/1990
4887692	Noise reducing device for marine propulsion A number of embodiments of silencing devices for marine propulsion units using acoustical lenses that are positioned across either the air inlet device, the air exhaust device or both. The acoustical lenses direct the sound waves in such a way so as to ef...	12/19/1989
4831822	Exhaust system for marine engine An exhaust system for a marine propulsion unit having an exhaust conduit into which the exhaust gases and engine coolant are discharged. The exhaust conduit has a separator portion that is affected to separate the coolant from the exhust gases under high ...	05/23/1989
4768983	Power drive assembly for outboard engines Marine power drive assemblies for converting conventional outboard engines to operate with inboard engine characteristics having horizontal drives and wherein the power heads of the conventional engines are modified by replacing the conventional adapter p...	09/06/1988
4583953	Outboard motor Several embodiments of vibration damping devices for preventing the transmission of vibrations from the power head of an outboard motor to the transom of the boat to which it is attached. In each embodiment, a vibration damping pad is interposed between t...	04/22/1986
4554892	Water-cooled diesel engine for use as outboard engine A water-cooled diesel engine suitable for use as a marine outboard engine, which has a cylinder head and a cylinder block formed as an integral unit from aluminum or an aluminum-base light-weight alloy. A cooling water jacket, intake ports and exhaust por...	11/26/1985
4239013	Propelling means This invention is directed mainly to a propelling apparatus and a control for said propelling apparatus for use with a boat. This invention can be used with a small boat for pleasure and also for fishing. The propelling apparatus comprises a pump in the f...	12/16/1980
4015429	Outboard motor for reducing exhaust gas pollutants In an outboard motor having an engine located above the water level, a lower unit is provided extending downwardly from the engine and includes an exhaust gas tube within the lower unit with its lower end positioned below the water level. Laterally enclos...	04/05/1977
3968767	Marine propulsion device adapted for a sailboat Disclosed herein is a marine propulsion device comprising an engine including a bottom face with an exhaust gas passage port, together with a lower unit connected to the bottom face and including a side surface, and an exhaust gas passage communicating wi...	07/13/1976
3948206	Jet powered watercraft A jet powered watercraft of motorcycle-like configuration. Longitudinally aligned front and rear skis are located in spaced relation below a hull and operate to hydrodynamically lift the watercraft to a cruise position by relative water flow upon the unde...	04/06/1976

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Class 440/89C - Jackets for pipe, exhaust manifold or expansion chamber