Class 440/88J - Jackets for pipe, exhaust manifold or expansion chamber

Subclass of Class 440 - Marine propulsion
No. of patents: 37
Last issue date: 04/20/2010

Number	Title	Issue Date
7699675	Marine exhaust elbow with condensation reducing water circulation system An exhaust system of a marine propulsion device is provided with a bifurcated cooling passage in its elbow structure in order to limit the effect of cold water being disposed in thermal communication with exhaust gas passing through the elbow structure. This thermal...	04/20/2010
7370611	Apparatus and method for controlling the operation of a cooling system for a marine propulsion device A cooling system for a marine propulsion device provides a bypass loop around a cooling pump that allows the flow of cooling water through certain components to be reduced or increased as a function of the temperature of those components while causing a full flow of...	05/13/2008
7293970	Two-stage rotary compressor An oil supply hole connecting an oil reservoir to a suction port formed in a lower supporting member of a two-stage rotary compressor is disclosed. The suction port is provided in the lower supporting member attached to the lower side of a high stage side rotary com...	11/13/2007
7146807	Exhaust manifold heat shield A heat shield for an internal combustion engine used in a boat, or other application where engine compartment heat is unwanted, has a water cooled body positioned around, but spaced apart from, the exterior surfaces of the exhaust manifold of the engine. The concavi...	12/12/2006
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
6910930	Exhaust diverter nozzle An exhaust diverter nozzle used in seawater cooling of the exhaust of marine engines, particularly diesel, without added back pressure the nozzle diverts the seawater in the exhaust at low engine rpm (1600–2000 rpm) in a manner which greatly enhances the vaporizat...	06/28/2005
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
6685517	Personal watercraft Disclosed is a personal watercraft having a water cooling system of an engine, which allows inside of a cooling water passage of an engine or a water passage connected to the cooling water passage to be sufficiently cleaned and a clogged water-supply hole...	02/03/2004
6676464	Supercharger cooling structure for small watercraft To provide a supercharger cooling structure for a small watercraft which can sufficiently cool the supercharger. In a small watercraft in which an engine with a supercharger is incorporated, cooling water from a jet pump is supplied to the supercharger th...	01/13/2004
6652337	Exhaust system for a marine propulsion engine The present invention provides a relationship between the exhaust passages and coolant passages of the exhaust manifold and exhaust elbow which serves to maintain the joint of the exhaust passage at a higher temperature than would be possible with known e...	11/25/2003
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
6554664	Cooling system for watercraft An engine for a watercraft has a coupling plate interposed between a cylinder block and an exhaust manifold. The coupling plate comprises exhaust passages that complement the shapes of cylinder exhaust discharge ports and the exhaust manifold inlet ports....	04/29/2003
6035633	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...	03/14/2000
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
5924901	Oil reservoir for outboard motor The present invention is an improved oil reservoir for an outboard motor. The oil reservoir is defined by an oil pan portion of an exhaust guide. The exhaust guide includes a support portion which is positioned below an engine powering the motor. The oil ...	07/20/1999
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
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 440/88J - Jackets for pipe, exhaust manifold or expansion chamber