Class 123/59.7 - Two-stroke cycle

Subclass of Class 123 - Internal-combustion engines
Definition: Multiple cylinder engine wherein the pistons in the working
No. of patents: 19
Last issue date: 11/07/2006

Number	Title	Issue Date
7131406	Two-cycle engine having scavenging A two-cycle engine in a portable, manually-guided implement, such as a power chain saw, a cut-off machine, a brush cutter, or the like, is provided. The cylinder has a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a ...	11/07/2006
5450830	Fuel injection system for engine A fuel injection system for an internal combustion engine is provided wherein fuel supply compensation for low speed, low load or abnormal conditions is variable for a multi-cylinder configuration having one or more cylinders ceased or reduced in operatio...	09/19/1995
5441019	Two stroke cycle internal combustion engines A multi cylinder two stroke cycle internal combustion engine of known construction having an individual crankcase compartment for each cylinder 11 formed in a crankcase 12, the crankcase 12 including a wall 25,25 separating two adjacent crankcase compartm...	08/15/1995
4724800	Ringless piston engine An non-lubricated, ringless piston engine without a conventional heat exchange system having a cross-head guide for guiding and restraining the piston within a cylinder of a two-stroke engine. The piston-bore radial clearance gap is maintained during engi...	02/16/1988
4549507	Two cycle loop scavenged engine with improved transfer passage flow Horsepower and fuel economy improvements, and a reduction in horsepower variation, are realized in a two cycle loop scavenged internal combustion engine by enhancing combustion chamber (10) intake directional flow (28) by directing flow along the outermos...	10/29/1985
4480601	Water-cooled two-stroke internal combustion engine A two cylinder engine has a reverse scavenging system with exhaust ports itioned on either front end of the cylinder block and directed towards areas without any ports which are located next to each other in the center of the engine. Intake ports are dir...	11/06/1984
4452195	Lubricating system for outboard motors An improved lubricating system for a two-cycle internal combustion engine having a vertically disposed crankshaft. In accordance with an embodiment of the invention, the crankshaft has a connecting rod journal that rotates in a crank chamber above which i...	06/05/1984
4373475	Internal combustion engine The invention provides an internal combustion engine comprising a cylinder block having therein a bore and first, second and third openings each communicating with the bore. A cover member having therein first and second cavities is removably attachable o...	02/15/1983
4345551	Air and fuel induction system for a two cycle engine An air and fuel induction system for a two cycle engine having two adjacent horizontal cylinders positioned aligned one above the other and each having a separate closed crankcase includes a single horizontally positioned carburetor having a single meteri...	08/24/1982
4328770	Internal combustion engine with die castable loop transfer system An in-line, multi-cylinder, two-cycle loop charged engine 10 has transfer passages 21, 22, and 23 partially formed by cavities die-cast in the cylinder block 14. The transfer passages are completed by covers, 24 and 25 bolted to the block 14. An efficient...	05/11/1982
4261305	Two cycle internal combustion engine A two cycle internal combustion engine is disclosed, which essentially comprises a cylinder consisting of a sleeve and a cylinder block housing the sleeve therein. The cylinder has a groove formed between the sleeve and the cylinder block and at least one...	04/14/1981
4254745	Two-stroke cycle gasoline engine A two-stroke cycle gasoline engine including at least one two-stroke cycle power cylinder--piston assembly having two horizontally opposed pistons and incorporating uniflow scavenging, a reciprocating type scavenging pump means including at least one pump...	03/10/1981
4244332	Induction system for a V-type two-cycle engine An induction system for a V-type two-cycle crankcase compression engine (10) with a vertical crankshaft (14) uses two-barrel carburetors (17) with the barrels (19) horizontally adjacent to supply air-fuel mixture to the engine (10). A crankcase compartmen...	01/13/1981
4242993	2-Cycle engine of an active thermoatmosphere combustion A 2-cycle engine having a transfer passage communicating the crank room with the combustion chamber. An accumulation tank having a volume which is larger than the stroke volume of the piston is arranged in the transfer passage. A reed valve is arranged in...	01/06/1981
4227492	Intake manifold for a vertical shaft engine A manifold system for a two stroke cycle vertical shaft internal combustion engine. A series of horizontal bores are perpendicular to the vertical shaft. A piston located in each bore establishes a combustion chamber and a fuel-air mixture supply chamber ...	10/14/1980
4138971	Crankchamber precompression type two-cycle internal combustion engines Twin cylinder two cycle engine including a pair of stepped cylinders and a pair of stepped pistons slidable in said cylinders defining annular spaces of variable volume in said cylinders. The pistons are interconnected each other with 180° phase differen...	02/13/1979
4121551	Drain recycle system for two-cycle engine Disclosed herein is a two-cycle internal combustion engine including a cylinder having a fuel intake port, an exhaust port, and an inlet port located intermediate the intake port and the exhaust port, a piston reciprocably mounted in the cylinder, a crank...	10/24/1978
4082295	Reed valve with crankshaft seal and method The improvement in a reed valve for use between crankcase chambers of a two-stroke engine, comprising a flat, ring-shaped steel insert having a rubber coating on one side thereof and including a sealing lip on the I.D. thereof. One insert is secured on ea...	04/04/1978
4079706	Two-stroke internal combustion engine An internal combustion engine has at least three cylinders and induction conduits opening into the lower portion of the cylinders or into the crankcase. The induction conduits are intended at least for combustion air, comprising at least one rotary disc v...	03/21/1978

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Class 123/59.7 - Two-stroke cycle