Class 123/59.6 - Multiple crankshafts

Subclass of Class 123 - Internal-combustion engines
Definition: Multiple cylinder engine including at least two output shafts,
No. of patents: 30
Last issue date: 05/19/2009

Number	Title	Issue Date
7533639	Dual crankshaft engine with counter rotating inertial masses A dual crankshaft internal combustion engine is symmetrically constructed to form a perfectly balanced engine assembly. A first crankshaft, having a first end, a second end, and being formed of a shape and with a torsional flexibility, is housed within a cylinder bl...	05/19/2009
7434562	Internal combustion engine with parallel crankshafts An internal combustion engine which includes two parallel crankshafts positioned in crankcases, a cylinder positioned on a side of the crankcases, a piston movably disposed within the cylinder, and connecting rods linked to the piston and extending from respective c...	10/14/2008
7328682	Efficiencies for piston engines or machines Disclosed are crankshaft, single-plate cam and beam mechanisms that provide significant improvements in performance for 2 & 4-stroke engines, compressors and pumps. These cost effective mechanisms include linkages with the new and improved use of pivoting arms that ...	02/12/2008
7240645	Internal combustion engine The invention concerns an internal-combustion engine, the engine comprising a first combustion chamber, a first piston displaceably guided in the first combustion chamber, the first piston facing the first combustion chamber with a first piston surface in a first di...	07/10/2007
7017339	Exhaust system catalyst assembly for a dual crankshaft engine An exhaust system for a dual crankshaft engine system having a first engine and a second engine having a common exhaust member open at an end thereof for venting engine exhaust. A first exhaust member is adapted to be coupled to the first engine and coupled to the c...	03/28/2006
6976476	Fuel pump drive system in an internal combustion engine A fuel pump drive system for an internal combustion engine uses a cam-to-cam gear from a double overhead camshaft to rotate a fuel pump gear. The fuel pump drive system may have a primary camshaft, a secondary camshaft, and the fuel pump. The primary camshaft has a ...	12/20/2005
6807927	Piston engine with counterrotating crankshafts A multi-cylinder reciprocating-piston engine with two crankshafts located generally end-to-end with respect to each other and with power output ends of the crankshafts located adjacent each other and mechanically interconnected with each other so they rotate at equa...	10/26/2004
6209496	Reciprocating internal combustion engine A reciprocating internal combustion engine has at least one cylinder with a reciprocating piston arranged therein. Two parallel crankshafts connected by a toothing rotate in opposite direction. Each one of the pistons has first and second rigid connecting...	04/03/2001
6189493	Torque balanced opposed-piston engine An internal combustion engine having first and second synchronized subassemblies. The subassemblies are synchronized by a mechanical linkage of their crankshafts to provide identical timing between corresponding pistons in the two subassemblies....	02/20/2001
5595147	Contra-rotating twin crankshaft internal combustion engine A contra-rotating twin crankshaft system for internal combustion engines. Two crankshafts are arranged in parallel, and are connected together to rotate in opposite directions. At least one piston is spaced from the crankshafts. Connecting rod assemblies ...	01/21/1997
5331925	Internal combustion engine An internal combustion engine has a plurality of cylinders and two pistons located in each of the cylinders and forming two combustion chambers with the latter....	07/26/1994
4998511	Compression ignition engine with variable swept volume The engine is characterized by an axial group of two cylinders (2, 7) communicating by means of a channel (22) situated in the cylinder head (20). Both cylinders (2, 7) joined side to side allow for a centralization of both crankshafts (4, 13) in the cyli...	03/12/1991
4955328	Leading piston engine with two cylinders interconnected through a transfer port A compression ignition, internal combustion engine has at least one pair of pistons operating in separate cylinders interconnected through a transfer port. Said at least one pair of pistons includes a leading piston linked to a leading crankshaft and oper...	09/11/1990
4876992	Crankshaft phasing mechanism A variable compression ratio engine has a pair of crankshafts connected by a phase adjuster mechanism operative to change the phase angle between the crankshafts so as to vary the compression ratio of the engine. The phase adjuster mechanism includes two ...	10/31/1989
4809646	High pressure reciprocator components High Pressure reciprocator components for reciprocating machines particularly internal combustion engines, the components include a multiple ring, single groove, piston seal having stacked ring elements with top contraction rings to block cylinder pressur...	03/07/1989
4690113	Internal combustion engine The invention relates to an engine including a cylinder defining a combustion chamber which receives a combustible mixture for the combustion thereof, a piston slidably mounted therein for reciprocation between a first limit position whereat the chamber d...	09/01/1987
4685428	Multi-cylinder internal combustion engine A multi-cylinder internal combustion engine comprising: first and second crankshafts disposed apart from and parallel with each other; first and second pistons operatively connected to the first and second crankshafts through connecting rods, respectively...	08/11/1987
4638637	Vehicle propulsion plant An internal combustion engine for vehicle propulsion has a number of cylinders arranged in two parallel planes and connected to two crank shafts within a common engine block. A selectively operable clutch is fitted at at least one of the crank shafts, and...	01/27/1987
4523558	Internal combustion engine and clutch therefor A split internal combustion engine wherein a first unit having one or more cylinders can be coupled to a second unit by an accelerating friction clutch. Direct torque-transmitting connection between the crankshafts of the two units is established in autom...	06/18/1985
4505239	Internal combustion engine The invention relates to an engine including a cylinder defining a combustion chamber which receives a mixture for combustion thereof, and a piston slidably mounted therein for reciprocation between a first and a second limit position whereat the chamber ...	03/19/1985
4470379	Multi-cylinder engine A multi-cylinder engine for a motor vehicle comprises at least two cylinders mounted in mutually displaced relationship with respect to longitudinal and transverse directions of the vehicle. The crankshaft for one of the cylinders is located at a higher l...	09/11/1984
4449494	Internal combustion engine An internal combustion engine wherein the rod connecting the piston to the crankshaft has an enlarged portion defining a track which a crankshaft element cooperatingly engages; the track is topologically shaped so that the effect exerted by the crankshaft...	05/22/1984
4394854	Method and apparatus for separably connecting crankshafts in internal combustion engines A positive engagement clutch between the serially connected coaxial first and second crankshafts in an internal combustion engine is activated upon acceleration of the second crankshaft to the speed of the first crankshaft and after the second crankshaft ...	07/26/1983
4389985	Apparatus for establishing and terminating connections between crankshafts An internal combustion engine wherein a first crankshaft is driven by a first group of cylinders and a second crankshaft which is coaxial with the first crankshaft can be driven by a second group of cylinders upon acceleration to the speed of the first cr...	06/28/1983
4380972	Internal combustion engines To improve the performance of four-stroke internal combustion engines, the piston P of each cylinder C is connected by a connection rod to an intermediate point of a floating link, which point is constrained, for instance by a tracking arm, to travel subs...	04/26/1983
4368701	Internal combustion engine with means for separably coupling discrete crankshafts to each other An internal combustion engine wherein each of several groups of cylinders rotates a discrete crankshaft which, in turn, rotates a discrete camshaft. When the engine is operated at partial load, a single group of cylinders is in use to rotate a first crank...	01/18/1983
4367704	Internal combustion engine with separable crankshafts An internal combustion engine wherein a first group of cylinders rotates a first crankshaft and a second group of cylinders can rotate a second crankshaft which can be separably coupled to the first crankshaft by an accelerating friction clutch. The clutc...	01/11/1983
4367703	Apparatus for engaging and disengaging discrete crankshafts in internal combustion engines An internal combustion engine with two crankshafts which are parallel to each other and are installed in a common casing. One of the crankshafts is driven whenever the engine is running and the other crankshaft is driven only when the engine is operated a...	01/11/1983
4359016	Internal combustion engine An internal combustion engine is shown as including an annular or ring type cylinder and reciprocating piston therein, exhaust ports from the cylinder lead to an afterburner section situated generally medially of the annular cylinder; the exhaust gases fr...	11/16/1982
4195613	Double-acting four-cylinder hot gas engine Hot gas engine units of the type having four parallel cylinders arranged in two parallel rows of two cylinders per row may be effectively balanced by a minimum of counterweight masses. The engine pistons are connected to two parallel crank shafts and four...	04/01/1980

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Class 123/59.6 - Multiple crankshafts