Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7434550 | Internal combustion engine An improved configuration for an opposing piston-opposing cylinder (“OPOC”) internal combustion engine with a single camshaft to reduce friction between the pistons and the cylinder walls during the combustion phase of the engine cycle. The improvements are pres... | 10/14/2008 |
| 7373905 | Diesel aircraft engine The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar wit... | 05/20/2008 |
| 7334558 | Slide body internal combustion engine An internal combustion engine includes a slide body having a plurality of rigidly mounted pistons on opposite ends of the slide body. The slide body reciprocates and is connected to a flywheel by shaft and bearing which extends through an angled track in the slide b... | 02/26/2008 |
| 7331324 | Crankshaft rotary valve A crankshaft rotary valve that controls fluid flow between a port located circumferentially on the crankshaft and a crankcase chamber formed by a piston, cylinder, crankcase and crankshaft. As the crankshaft rotates, a channel in the crankshaft communicates with the... | 02/19/2008 |
| 7284963 | Zero maintenance pump A zero maintenance pump includes a motor having a motor housing and a motor drive shaft rotatably mounted in the motor housing. A shaft extension is coupled to the motor drive shaft distal from the motor housing. A coupling element has a body with a first end and a ... | 10/23/2007 |
| 7275511 | Intake manifold assembly An intake assembly is provided for a sequentially fired eight cylinder V-type internal combustion engine including a cylinder block having a first band of cylinders and a second bank of cylinders. The assembly includes first, second, third, and fourth intake plenums... | 10/02/2007 |
| 7263966 | Dual action cylinder A device for translating linear reciprocal motion to rotational motion includes a reciprocating linearly moving piston with a central slot. The aperture has a set of recessed annular gears opposite each other which engage corresponding gear teeth on a cog located on... | 09/04/2007 |
| 7191742 | Diesel aircraft engine The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar wit... | 03/20/2007 |
| 7172075 | Defect free composite membranes, method for producing said membranes and use of the same A defect free semipermeable composite membrane having outstanding integrity and high water permeability is provided. Said composite membrane comprises an inside support layer to provide sufficient mechanical strength, an outside barrier layer to provide selective se... | 02/06/2007 |
| 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 |
| 7104227 | Internal combustion engine machine incorporating significant improvements in power, efficiency and emissions control A two stroke cycle internal combustion engine machine that does not require lubricating oil to be mixed with its fuel, producing greater efficiency, higher power to weight ratio, cooler operating temperatures, a wider speed range, greater simplicity, and lower toxic... | 09/12/2006 |
| 7004120 | Opposed piston engine A four-stroke opposed piston engine includes a rotating cylinder with a circumference and an aperture defined through the circumference, first and second opposing pistons, optional first and second opposing cylindrical spacers, first and second opposing piston caps,... | 02/28/2006 |
| 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 |
| 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 components, which may be pre-assembled with components of the valve train as... | 09/13/2005 |
| 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 crankcase, the cylinder members being separate components from the crankc... | 06/14/2005 |
| 6742482 | Two-cycle internal combustion engine A two-cycle engine having improved performance characteristics includes a block and a cylinder head coupled to the block, the cylinder head defining a cylinder bore and a precombustion chamber. The head of piston located in the cylinder bore divides the bore into fi... | 06/01/2004 |
| 6629514 | Two stroke gasoline engine with rotary valve enabling double acting power strokes and rotary air valve to lessen blowback A piston mechanism for gas driven engines, fluid motors, pumps and the like that has a piston in a chamber that is moveable in the chamber in a reciprocating action and a rotating shaft that is driven by or drives the piston, wherein a double eccentric dr... | 10/07/2003 |
| 6595167 | Internal combustion engine and method of making the same A modular engine design system utilizes selectively replaceable components whereby a family of related engines having varying power outputs may be produced. A first series of engines utilizes a common piston operable in a cylinder of first predetermined d... | 07/22/2003 |
| 6408803 | Liquid cooling system and retrofit for horizontally opposed air cooled piston aircraft engines A cooling system for conversion of air cooled aircraft engines to liquid cooling, including replacement cylinders, light weight, flex tolerant coolant manifolds and cooling system instrumentation for monitoring coolant temperature and pressure. The replac... | 06/25/2002 |
| 6332435 | Crank journal support portion structure of a horizontal opposed type engine The invention minimizes the problem of deterioration in engine strength by concentration of stress due to the combustion load in a hole portion provided on a crank journal support wall in a crank case and reduces pumping loss. Further, the invention disch... | 12/25/2001 |
| 6318320 | Multi-cylinder engine for vehicle To provide a multi-cylinder engine for a vehicle, in which a pair of cylinder bore rows, each including a plurality of cylinder bores disposed in parallel to each other, are disposed in such a manner as to be perpendicular to a crank shaft disposed substa... | 11/20/2001 |
| 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 plurality of bearing caps, wherein the transmission mechanis... | 06/05/2001 |
| 6240885 | Inboard four cycle gasoline marine engine for small water craft An inboard gasoline marine engine for small water craft comprises a two cylinder horizontally opposed four stroke engine. The engine includes a massive crank shaft rotationally mounted in the crank case of the engine. A small flywheel is connected to one ... | 06/05/2001 |
| 6223704 | Spark-ignition engine, flat and with opposite cylinders The engine includes at least two cylinders 2 laid out flat and opposed one to the other, a crankshaft 9 to transmit to the output shaft of the engine the energy provided by the explosions in cylinders 2. A rigid connecting rod assembly 18 connects cranksh... | 05/01/2001 |
| 6209495 | Compound two stroke engine A two stroke compound engine has a pair of horizontally opposed piston cylinder assemblies extending along a common axis therein. Each piston cylinder assembly includes a piston, a combustion chamber and respective inlet and exhaust valves. A pair of conn... | 04/03/2001 |
| 6142129 | Breather apparatus for engine To provide a breather apparatus for a horizontally-opposed type or a V-type engine in which first and second cylinder blocks having first and second cylinder bores are commonly connected to a crank case in such a manner that the axial line of the first cy... | 11/07/2000 |
| 5988121 | Piston engine having a hypocycloidal piston stroke transmission with a Watt's guide, particularly with pistons in opposed cylinders For a piston engine having a hypocycloidal piston stroke transmission with a Watt's guide, particularly having pistons in opposed cylinders, in which case the transmission is rotatably arranged on the crank pin of a crankshaft and comprises a stroke and a... | 11/23/1999 |
| 5970931 | Camshaft driving mechanism In an overhead cam type internal combustion engine having a cylinder block extended at an angle to either side of a crankshaft, a first cylinder head is mounted on one side of the cylinder block and a second cylinder head is mounted on the other side of t... | 10/26/1999 |
| 5782213 | Internal combustion engine An improved internal combustion engine is disclosed. The disclosed engine comprises several preferred embodiments, each including a first piston reciprocating in a first cylinder along a first axis, a second piston reciprocating in a second cylinder along... | 07/21/1998 |
| 5778834 | Opposed reciprocating piston internal combustion engine In order to reduce the overall dimensions and the weight of a motion transmission system including piston, a tie-rod and a crankshaft, the crankshaft and a single tie-rod are arranged inside two mutually opposite pistons which constitute one single monoli... | 07/14/1998 |
| 5682852 | Internal combustion engine An internal combustion engine has a rotatable work shaft, a rotatable crank connected with the work shaft, a plurality of cylinders having working chambers, a plurality of pistons movable in the cylinders, and connecting means connecting the pistons with ... | 11/04/1997 |
| 5537957 | Internal combustion engine An internal combustion engine has a rotatable work shaft, a crank connected with the work shaft, a plurality of cylinders having working chambers, a plurality of pistons movable in the cylinders, and connecting means connecting the pistons with the crank ... | 07/23/1996 |
| 5487363 | Internal-combustion engine comprising two cylinder banks For avoiding exterior, cooling-water-carrying ducts, an internal-combustion engine comprising two mutually opposite cylinder banks has integrated ducts for the feeding and removal of the cooling water to the cooling jackets and the cylinder heads.... | 01/30/1996 |
| 5400748 | Internal-Combustion engine with two rows of cylinders An internal combustion engine with two rows of cylinders with a V-angle of 180 degrees has a crankshaft provided with a flywheel, said crankshaft having a drive for a parallel intermediate shaft adjacent to the flywheel. One camshaft of each row of cylind... | 03/28/1995 |
| 5396868 | Two stroke internal combustion engine A two stage internal combustion engine with horizontally opposed cylinders, which engine requires neither a crankshaft nor a camshaft nor a connecting rod nor a piston rod. Chains connected to the pistons turn a wheel mounted for conjoined rotation with a... | 03/14/1995 |
| 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 |
| 4970995 | Internal combustion engines An internal combustion engine includes a piston slidingly sealed and constrained to move along a linear path in a cylinder, the piston having a rigid connecting rod which extends axially of the cylinder, a link constrained to move in an orbital path in a ... | 11/20/1990 |
| 4796580 | Idle control valve for use with a throttle assembly of an internal combustion engine Idle control valve for use with a throttle assembly of an internal combustion engine includes a valve body, and a valve spool mounted within the valve body so as to be rotatable in opposite directions about an axis common to the valve spool and body. The ... | 01/10/1989 |
| 4694785 | Piston apparatus A piston apparatus has a first pair of spaced-apart cylinders aligned along a cylinder axis. There is a pair of pistons, each piston being slidably received in one of the cylinders for reciprocation along the axis. A pair of spaced-apart crank members are... | 09/22/1987 |
| 4614169 | Ultra high compression engine A reciprocating piston machine, such as an internal combustion engine, is provided with a piston translator arrangement operated by a pair of oppositely rotatable crankshaft means disposed on opposed sides of the cylinder longitudinal axis such that the p... | 09/30/1986 |
