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7997239 Breather device of vertical type engine  
A breather device of a vertical type engine includes: an engine body having a crank chamber and a cylinder bore; and a timing transmission chamber provided above the engine body and housing a...
7591241 Power unit  
To provide a power unit capable of contributing to simplifying the procedure for fitting the electric motor for speed change use and the starter motor to shorten the motor wiring to facilitate the...
7588010 Power unit for a vehicle  
A power unit for a vehicle comprises an engine and a transmission assembly. The engine includes a crank shaft having a rotating mass. The transmission assembly includes a drive shaft having a first...
7334556 Engine configuration for a motorcycle  
A motorcycle is provided in which a seat and a storage box are arranged so as to be vertically stacked on each other in a rear portion of a body frame, and a pivotally mounted powertrain unit is...
7201132 Combustion engine of vertical shaft type  
To provide an internal combustion engine of a vertical shaft type, in which leakage of an oil from a crankcase and an oil pan is effectively prevented, which has high mounting rigidity relative to...
6968822 Engine  
Cap segment surfaces (9a) and (9b) of a larger-diameter end portion (7) of a connecting rod (5) are positioned at an upper and a lower portions of a crank pin (8) and are inclined from a right...
6941914 Internal combustion engine  
A twin cylinder engine, includes a pair of cylinder members mounted to mounting surfaces of a crankcase, and cylinder heads mounted to the cylinder members. The cylinder members are modular...
6904883 Modular internal combustion engines  
A line of small internal combustion engines, including twin cylinder engines and single cylinder engines. The engines each include a crankcase, and one or more cylinder members attached to the...
6837206 Crankcase cover with oil passages  
A cover for a crankcase of an internal combustion engine is disclosed. The cover has an inside surface in which walls are formed extending from the inside surface to form channels. A plate covers...
6837207 Inverted crankcase with attachments for an internal combustion engine  
A crankcase, and method of assembling a crankcase, of an internal combustion engine are disclosed. The crankcase includes a top including at least a first portion of a top surface of the crankcase,...
6766781 Crankcase for an internal combustion engine, especially for a boxer engine  
The invention relates to a crankcase for an internal-combustion engine, particularly for a horizontally opposed engine, having two crankcase halves (10, 12) in which bearing sections (18) with...
6591934 Motorcycle  
In a motorcycle, a crankshaft and a balancer shaft are supported on a matching surface between a cylinder block and a crankcase, the balancer shaft is arranged above a crankshaft, auxiliary devices...
6508223 Four cycle outboard internal combustion engine for driving a watercraft  
A four cycle outboard internal combustion engine for driving a watercraft with a cylinder housing having cylinders arranged in at least two rows, wherein a piston is reciprocating in each cylinder,...
6443117 Four stroke engine  
A four stroke engine having at least two cylinders spaced vertically relative to each other. Each cylinder includes a cylinder body having a cylinder bore extending generally horizontally....
6325037 Crankcase arrangement for engine  
A crankcase arrangement for an engine includes an improved construction that allows lubricant to more freely flow through the crankcase and to quickly return to a lubricant reservoir even though...
6295956 Cylinder head for direct fuel injected engine  
A cylinder head in a direct fuel injected engine includes an improved construction and defines a combustion chamber with other components of the engine. The engine has a fuel injector arranged to...
6295963 Four cycle engine for a marine propulsion system  
A marine engine is made with a head portion that includes an exhaust manifold that is formed as an integral part of the head portion during a lost foam casting procedure. The head portion comprises...
RE37348 Vertical engine  
A number of embodiments of high pressure pumps for internal combustion engines having vertically extending output shafts. In each embodiment, the high pressure pump has its pump driving shaft...
6240887 Multi-cylinder engine  
A multi-cylinder engine in which a transmission mechanism is provided between a cam shaft linked with intake valves and exhaust valves and a crank shaft rotatably supported by a crank case and a...
6223713 Overhead cam engine with cast-in valve seats  
A single cylinder, internal combustion engine with a dry sump lubrication system. The engine includes an engine housing in which the overhead camshaft and crankshaft are rotatably supported, and...
6182631 Camshaft for engine  
An improved and simplified outboard motor construction wherein the cooling and exhaust systems for the engine are formed with a minimum number of components and sealing joints and incorporating a...
6032628 Camshaft drive for four cycle outboard motor  
An outboard motor embodying a twin overhead camshaft, four cycle internal combustion engine as a power plant. The engine has an improved flexible transmitter drive for the camshaft, which permits...
6006712 Resonator construction for internal combustion engine  
A resonator structure which locates a resonator in a dead space inside an engine compartment, protects the resonator from vibration, and prevents a change in frequency due to oil mist residue in...
5988135 Overhead vertical camshaft engine with external camshaft drive  
A single cylinder, internal combustion engine with an engine housing in which the overhead camshaft and crankshaft are rotatably supported. The housing includes an integrally formed cylinder and...
5967110 Fe-based sintered alloy manufacturing process, Fe-based sintered alloy manufactured through thereof and bearing cap  
There is disclosed a method for manufacturing an Fe-based sintered alloy which is superb in machinability. This process comprises the steps of coating a paste-like coating agent including a...
5752866 Lubrication and crankcase ventilating system for four-cycle outboard motor  
An outboard motor having a high-performance V-type twin overhead cam four-cycle internal combustion engine. The oil reservoir for the engine is disposed in a driveshaft housing below the engine and...
5718197 Cylinder block structure of vertical type multi-cylinder engine  
A cylinder block of a vertically oriented multicylinder engine includes a cylinder block structure which is configured to support a crankshaft in a vertical orientation. The cylinder block includes...
5706769 OHC engine  
A single overhead cam (OHC) engine is provided in which intake and exhaust valves and intake and exhaust cam followers are disposed on opposite sides of a single valve operating cam which is...
5673655 V-type engine  
In a V-type engine, a pair of cylinder blocks are arranged in V-shape to form a V-bank therebetween, and a suction device and an exhaust device are arranged in the V-bank. An exhaust passage...
5632241 Oil lubricating system for a two-stroke internal combustion engine  
A lubricant supply system for a two-stroke internal combustion engine, which system includes first and second adjacently located and substantially sealed crankcase chambers which alternately...
5606944 Internal combustion engine  
An internal combustion engine comprises a vertical crankshaft rotatable in a crankcase, a piston reciprocable along a cylinder axis, and a push rod tube. The push rod tube communicates between the...
5596962 Intake silencer in vertical type engine  
An intake silencer of a vertical-type engine includes two silencing chambers. A first intake silencing chamber is disposed adjacent to the body of the engine; a second intake silencing chamber is...
5524584 Cylinder head for outboard motor  
An outboard motor having a four-cycle internal combustion engine as a power plant. The engine is provided with a cylinder head having intake passages that extend downwardly from inlet openings in a...
5513606 Marine propulsion unit  
Several embodiments of internal combustion engines for use in outboard motors that permits a compact construction. This is achieved by having the intake ports of the cylinder head have a U-shaped...
5443044 Outboard motor with four stroke engine  
Disclosed herein is an outboard motor comprising a steerable and tiltable propulsion unit including a lower unit including a vertically extending drive shaft housing, a drive shaft extending...
5353758 Wiring arrangement for outboard motor  
A wiring arrangement for an outboard motor including a circular wire harness body fitted within a casing that is secured to the upper portion of the engine of the outboard motor. The wire harness...
5243936 Vertical internal combustion engine with overhead valves  
The invention provides a vertical internal combustion engine with overhead valves wherein a crankshaft is vertically arranged and the cylinder is horizontally arranged. A carburetor is arranged on...
5203294 Horizontal cylinder arrangement for an internal combustion engine  
A four-cycle internal combustion engine which has one or more horizontally disposed cylinder bores and a piston supported for horizontal reciprocation in each cylinder bore. Each piston includes a...
5007383 Water-cooling system for a water-cooled horizontal cylinder engine  
In a water-cooling system for a water-cooled horizontal engine, a radiator and a radiator fan are arranged at the front of a cylinder head which is mounted forwardly of a cylinder block of the...
4981120 Low profile internal combustion engine, and lawnmower comprising same  
A low-profile internal combustion engine is disclosed, featuring a unitary flywheel spark generation and distributor assembly. A hydraulic starter system is disclosed which may be adapted to such...
4977863 Air-cooled internal combustion engine having canted combustion chamber and integral crossover intake manifold  
An air-cooled internal combustion engine, a crankshaft and a camshaft rotatably journalled in the crankcase parallel to one another, and a cast intake valve chamber and cast exhaust valve chamber...
4972809 Power unit of inboard/outboard  
An improved propulsion unit for a watercraft embodying a reciprocating internal combustion engine having horizontally disposed cylinders so as to provide a compact assembly. The engine operates on...
4936271 Portable powered working machine  
A portable powered working machine such as a chain saw has a casing, a hollow grip formed integrally with the casing and extending from a front portion to a rear portion of the upper wall of the...
4930476 Governor for vertical v-type engine  
An improved governor mechanism for an engine having angularly related staggered cylinder banks. The governor mechanism includes a link or motion transmitting member that is disposed within the...
4926813 Inverted port engine with cross-under intake passage  
The present invention is an inverted port L-head engine having a cross-under intake passage. The carburetor and exhaust system are disposed on opposite sides of the cylinder, and the exhaust valve...
4905636 Anti-puddling turbulence inducing cylinder head intake port and manifold  
An intake manifold and cylinder head intake passageway for an air-cooled internal combustion engine. The manifold is substantially S-shaped and generally vertically oriented and communicates a...
4893597 Engine cylinder assembly having an intake cross-passageway  
An air-cooled engine having a vertical crankshaft and a horizontal cylinder. The cylinder is cast aluminum alloy and has the intake and exhaust valves located next to one another on one side of the...
4890587 Fuel residual handling system  
An internal combustion engine comprising a crankcase, cylinder, a transfer passage communicating between the crankcase and the cylinder and including a first point which is the lowest point in the...
4889089 Work vehicle  
An improved work vehicle is disclosed in which a vertical shaft V-type engine having vertically supported crankshaft with the pair of right and left cylinders being arranged in V-shape is housed...
4864981 Overhead valve type engine  
An improved overhead valve internal combustion engine is disclosed in which an intake port defined in a cyclinder head for communication at its outlet side opening with a combustion chamber opens...
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