Class 123/61R - Two-cycle

Subclass of Class 123 - Internal-combustion engines
Definition: Internal-combustion engines working on a two-stroke cycle
No. of patents: 40
Last issue date: 12/19/2006

Number	Title	Issue Date
7150259	Internal combustion engine A power transfer assembly (2000) for transferring energy within a combustion engine (1010) externally of the engine. The power transfer assembly includes a crankshaft (2006) adapted to convert reciprocating motion to rotating motion. The power t...	12/19/2006
7011469	Piston joint A joint for positioning between first and second elements includes an outer member and an inner member. The first and second elements are arranged for linear motion along a common axis. The outer member is configured for movement relative to the first and second ele...	03/14/2006
6955151	Internal combustion engine An internal combustion engine has two cylinders located opposite to one another, two pistons each movable in a respective one of the cylinders and connected with one another so as to move jointly in said cylinders in two opposite directions, and means for converting...	10/18/2005
6925973	Piston engine assembly A variable compression piston assembly includes a plurality of pistons, a transition arm coupled to each of the pistons, and a rotating member mounted for pivoting movement to slide along an axis of the drive member. Movement of the rotating member relative to the d...	08/09/2005
6915765	Piston engine assembly A variable compression piston assembly includes a plurality of pistons, a transition arm coupled to each of the pistons, and a rotating member mounted for pivoting movement to slide along an axis of the drive member. Movement of the rotating member relative to the d...	07/12/2005
6913447	Metering pump with varying piston cylinders, and with independently adjustable piston strokes A metering pump includes an actuating mechanism, and a plurality of piston cylinders coupled to the actuating mechanism. A first of the cylinders has a working volume that differs from a second of the cylinders. The actuating member is centrally located and the cyli...	07/05/2005
6854429	Engine with double sided piston An internal combustion engine has at least one cylinder, which is separated by a single dual-piston into two sub-chambers. The single dual-piston fulfills the role of two conventional pistons in its linear back and forth motion along the combustion chamber by using ...	02/15/2005
6796127	One cycle internal combustion engine A one cycle internal combustion engine (10) configured for powering a vehicle (V) is disclosed. The engine (10) broadly includes an engine block (12) defining three cylinders (14, 16, and 18), three double-acting pistons (20,22,...	09/28/2004
6684825	Rotary machine and thermal cycle A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, o...	02/03/2004
6467440	Two stroke internal combustion engine A two stroke internal combustion engine, comprising one or more power cylinders with intake and exhaust ports and a source of scavenging of the power cylinders, with improvements, including use of double-sided cylinders with upper and lower cavities used ...	10/22/2002
5967103	Three-cycle stroke two internal combustion engine A three cycle, two-stroke internal combustion engine from which work can be extracted in two directions. In the preferred embodiment, the inventive two-stroke engine is constructed as a cylinder having a reciprocating piston slidably seated therein, with ...	10/19/1999
5894820	Engine for converting linear motion into rotational motion An engine is provided including a housing with at least one air and fuel injection assembly for injecting air and fuel within the housing. Also included is a translation assembly with a piston adapted to reciprocate along a first axis upon the ignition of...	04/20/1999
5816202	High efficiency explosion engine with a double acting piston A high-efficiency explosion engine has a double-acting central piston mounted on a shaft within a cylinder to form two combustion chambers. Auxilliary pistons mounted on the ends of the shaft control the intake of gases to the combustion chambers. In one ...	10/06/1998
5676097	High-efficiency explosion engine provided with a double-acting piston cooperating with auxiliary feed inlet units The present invention refers to a double-acting, single-cylinder, explosion engine whose peculiarity is to be provided with auxiliary components which permit to optimize the inlet stroke because such auxiliary components are arranged in a way that the gas...	10/14/1997
5626106	Migrating combustion chamber engine Design Improvements are disclosed which enhance the migrating combustion chamber engine's ability to achieve improved performance, obtain higher durability and cost less to manufacture. These include strip seals between the combustion chamber member and o...	05/06/1997
5526779	Virtual crankshaft engine A virtual crankshaft engine (i.e., an engine without a physical crankshaft) utilizes hypocycloidal principles to convert linear piston motion into rotary drive motion. This virtual crankshaft engine reduces engine weight, volume, vibration, friction, and ...	06/18/1996
5351659	Shaft engine A shaft engine including a piston moved in a cylinder to reciprocate at least one cylinder shaft causing it to turn a crank shaft, the at least one cylinder shaft having a respective longitudinal air passage linked to either raised air chamber on the cyli...	10/04/1994
5341774	Self supercharged two stroked cycle and engine having migrating combustion chambers Non-symmetrical port timing techniques in combination with the 90 degree phase difference between the pumping and combustion chamber of the two stroke migrating combustion chamber engine variant are disclosed as a special cycle of operation which allows a...	08/30/1994
5285752	Internal combustion engine A single piston internal combustion engine is described that produces two power impulses per revolution of the crankshaft, precise mechanical balance, zero side thrust upon the piston, and purified exhaust gas. The lubrication oil is isolated from contami...	02/15/1994
5133317	Rotary piston engine A rotary piston engine is shown which includes a housing (22) having a cylindrical working chamber with inlet (88) and exhaust (86) ports. First and second piston assemblies (30 and 32) each of which includes at least one pair of diametrically wedge-shape...	07/28/1992
5113808	Double piston engine A double piston engine has a medial shaft between two pistons which reciprocate in opposed cylinders. From the pistons extend outer piston shafts which serve as control shafts. The outer ends of the cylinders are provided with inlet ports and control rece...	05/19/1992
4941396	Reciprocating double-ended piston The present invention relates to a reciprocating engine which has an improved reciprocating double ended piston which substantially reduces the size and weight of piston components. The double ended piston comprises a center portion between the two end po...	07/17/1990
4913100	Double piston engine A double piston engine has a doubly acting piston reciprocably provided in a cylinder arrangement to form two working chambers which periodically increase and decrease their volumes. The invention provides inlet means with supply means for a cleaning flow...	04/03/1990
4884532	Swinging-piston internal-combustion engine A swinging-piston ICE comprising a swinging piston (3), connecting rod (2), intake port (16) and exhaust ports (17). Combustion chambers (A,C) are formed on opposite sides of the piston (3) where oil nozzles (13) are provided. The piston is sealed at its ...	12/05/1989
4708099	Crankless reciprocating internal combustion engine Present reciprocating engines have limitations on their thermal efficiency and horsepower to weight performance imposed by the crankshaft. Elimination of the crankshaft, use of a full time turbocharger and ceramic lining of cylinder walls, cylinder and pi...	11/24/1987
4700667	Internal combustion engine A two-stroke internal combustion engine having at least two cylinders which are aligned, each cylinder having a piston. The pistons are rigidly attached to each other by means of a piston rod which is provided with a carrier and exhaust valves, the valves...	10/20/1987
4658768	Engine To reduce space requirements, vibrations and certain stresses in an engine, a different one of two pistons is mounted on each end of a single piston rod to which the crankshaft is attached by a cylindrical shaped connector that orbits around the crankpin ...	04/21/1987
4555903	Internal combustion turbine engine An internal combustion engine in which a rotor or turbine is driven by the exhaust gases of interconnected double acting pistons. The three parallel pistons are interconnected by pinion gears engaging racks on the sides of the pistons. Improved mechanisms...	12/03/1985
4485769	Engine To reduce space requirements, vibrations and certain stresses in an engine, a different one of two pistons is mounted on each end of a single piston rod to which the crankshaft is attached by a cylindrical shaped connector that rotates inside the piston r...	12/04/1984
4453504	Single piston, double chambered reciprocal internal combustion engine An engine with a cylinder assembly defining a cylinder chamber therein in which is reciprocally mounted a piston on a support tube slidably projecting on opposing ends of the cylinder chamber. A drive shaft is rotatably mounted through the support tube an...	06/12/1984
4437437	Dual-expansion internal combustion cycle and engine A novel internal combustion cycle and internal combustion engine operating thereon. Expansion of the hot combustion gases is controllably achieved in a primary combustion/expansion chamber and a secondary expansion chamber in a manner to reduce engine exh...	03/20/1984
4414927	Two stroke oscillating piston engine A two stroke oscillating piston engine comprising cylinder sections provided with feed chambers for additional fresh air. The two outer rings, acting as pistons, draw in fresh air through intake ports and force that air to enter combustion chambers throug...	11/15/1983
4407240	Opposed piston internal combustion engine with special scavenging means A reciprocating piston machine comprising a main piston secured to a piston rod, a cylinder in which the main piston can slide, the main piston and cylinder defining a combustion chamber, a scavenging plate disposed in the combustion chamber and axially m...	10/04/1983
4391233	Internal-combustion engine An internal combustion engine having at least one working cylinder which has a combustion chamber, a working piston which is connected to a crankshaft, and an inlet nozzle for the supply of fuel. Associated with the working cylinder is an auxiliary cylind...	07/05/1983
4325331	Dual-expansion internal combustion cycle and engine A novel internal combustion cycle and internal combustion engine operating thereon. Expansion of the hot combustion gases is controllably achieved in a primary combustion/expansion chamber and a secondary expansion chamber in a manner to reduce engine exh...	04/20/1982
4284038	Reciprocating drive means Reciprocating drive means powered by a fluid such as compressed air comprising an elongate inner member with a plurality of passageways therein, an outer member slidable on the inner member and a shuttle member slidable with respect to the inner member an...	08/18/1981
4058088	Oscillating piston engine An oscillating piston engine capable of running on a working fluid such as steam or compressed air comprises a bank of cylinders mounted for rotation in unison to turn a shaft in an engine block, pistons mounted for oscillation in the cylinders and rotata...	11/15/1977
4011842	Piston machine Reciprocating piston machine having a pair of spaced, parallel, double-ended cylinders straddling a crankshaft with a single crankpin. First and second double-ended pistons reciprocate within respective cylinders and are connected to crankshaft by T-shape...	03/15/1977
3974801	Oscillating piston internal combustion engine An oscillating piston internal combustion engine comprises a bank of combustion chambers mounted on the front of an engine block for rotation in an annular path to rotate an output shaft protruding from the rear of the block. Gearing inside the block conv...	08/17/1976
3955543	Two stroke cycle internal combustion engine A double acting working piston drives a connecting rod and crankshaft. A smaller valve piston is fastened to each end of the working piston. Each valve piston withdraws briefly from its bore so as to introduce scavenge air into a respective annular workin...	05/11/1976

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Class 123/61R - Two-cycle