Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8230827 | Internal combustion engine with variable compression ratio An internal combustion engine has at least one cylinder, and a means for varying the compression ratio in the cylinder. The at least one cylinder has two oppositely directed reciprocatingly movable pistons in it, which are each connected via a piston rod with a corr... | 07/31/2012 |
| 8015956 | Piston assembly for barrel engine A barrel engine includes a central drive shaft and a cam plate interconnected to the drive shaft. The barrel engine includes a plurality of cylinders each having a longitudinal axis that is generally parallel with the drive shaft. The axes of the cylinders are arran... | 09/13/2011 |
| 7793623 | Piston cam engine The invention relates to a piston cam engine used in different field of the mechanical engineering, as internal-combustion engines compressors, pumps etc. The cam engine comprises cylinders (13) with pistons (20), a cylindrical tubular 3D cam (3... | 09/14/2010 |
| 7677210 | Rotating barrel type internal combustion engine An internal combustion barrel engine having rotating cylinders and pistons which together form combustion spaces. The combustion spaces are maintained at a substantially constant volume while a compressed air-fuel mixture is combusted therein. ... | 03/16/2010 |
| 7654234 | Barrel engine block assembly A barrel internal combustion engine includes a drive shaft assembly, a monoblock, a plurality of piston assemblies, and a valvetrain. The driveshaft assembly has a central drive shaft and a cam plate extending therefrom. The one piece monoblock has a longitudinal ce... | 02/02/2010 |
| 7469665 | Two-cycle swash plate internal combustion engine A power-generation device comprising at least one cylinder, at least one cylinder head, at least one piston and an output shaft, having a central axis having a fixed angular relationship to the central axis of the cylinder. A swash plate, having a first swash plate ... | 12/30/2008 |
| 7438029 | Piston waveform shaping An assembly includes at least one piston, a rotating member, a transition arm, and a mechanism. The transition arm is configured to translate between rotational movement of the rotating member and a first linear motion of the piston. The mechanism is configured to s... | 10/21/2008 |
| 7401588 | Cylinder block with unlined piston bores A cylinder block for an axial piston pump or motor is formed from a steel material. The block includes a plurality of bores that each have an internal bore surface of a predefined final material surface finish. The bores are subjected to various machining and heat t... | 07/22/2008 |
| 7395789 | Cylindrical engine The invention is directed to an improved internal combustion engine, having a symmetric cylindrical arrangement and using a bevel gear train to join multiple crankshaft sections. It provides for a naturally smoother operation with less vibration than in-line engines... | 07/08/2008 |
| 7360511 | Opposed piston engine A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a co... | 04/22/2008 |
| 7334548 | 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... | 02/26/2008 |
| 7299740 | Reciprocating axial displacement device A reciprocating axial displacement mechanism is disclosed generally comprising a housing, a rotating device, a displacement device having first and second undulating surfaces disposed in the housing, and a cam connected to the rotating device and disposed between th... | 11/27/2007 |
| 7219633 | Compression ignition rotating cylinder engine A compression ignition rotating cylinder engine (CIRC), provides a design that has several distinct advantages over conventional internal combustion engines. Rotating cylinder blocks and a fixed header plate provide a more fuel-efficient engine with constant positiv... | 05/22/2007 |
| 7194989 | Energy efficient clean burning two-stroke internal combustion engine A precision cast engine has a piston unit and a rotor unit to translate linear thrust from the piston unit into rotary power. Each piston rod is attached to a thrust absorber carriage running on precision bearings to eliminate piston drag on the cylinder walls. One ... | 03/27/2007 |
| 7156056 | Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine with optimized cooling and no engine block, the opposed pistons are coupled to a pair of crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the cran... | 01/02/2007 |
| 7100564 | Variable angle cam-drive engine and a power conversion mechanism for use therein A variable angle cam-drive engine in which the torque output generated at a given engine speed (as represented by, for example, piston reciprocation frequency) can be varied by changing the operating angle of cam mechanisms in a power conversion mechanism of the eng... | 09/05/2006 |
| 7040262 | Expansible chamber engine with undulating flywheel This engine relies on a flywheel having a flywheel axis and an undulating cam surface. A piston wit a roller at its base is positioned in a cylinder such that the roller abuts the undulating cam surface at some radial distance from the flywheel axis. Thus, as the pi... | 05/09/2006 |
| 7040263 | 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... | 05/09/2006 |
| 7033525 | High conductivity polyaniline compositions and uses therefor The present invention describes compositions formed from polyanaline and carbon nanotubes, which exhibit enhanced conductivity and which provide uses in electronic circuit applications. ... | 04/25/2006 |
| 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 |
| 6968751 | Axial piston machines This invention relates to internal combustion engines with cylinders arranged parallel to the main shaft and where reciprocating movements of the pistons are converted to rotation by means of a Z-crank mechanism and motion converter, or conversely to systems such as... | 11/29/2005 |
| 6960851 | Cooling device including a biasing element A cooling device for an internal stator of an electric machine. The stator includes a substantially cylindrical cavity having a substantially cylindrical internal surface. The cooling device includes a body defining an external substantially cylindrical contact surf... | 11/01/2005 |
| 6955143 | Internal combustion engine Fuel/air mixture is introduced transversely through cylinder into combustion chamber where it is ignited by spark plug to drive compound piston assembly to bottom of its stroke to rotate drive shaft. In another embodiment, air is introduced transversely through cyli... | 10/18/2005 |
| 6948458 | Two-way cylinder engine An internal combustion engine wherein each cylinder has two pistons placed in the opposite direction and attached together by an arm-type connecting rod and wherein a cylinder head has a rotor blade rotating in the middle between the upper cylinder head and the lowe... | 09/27/2005 |
| 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 |
| 6925974 | Wobble plate engine A wobble plate engine includes a cylinder block, a plurality of pistons, a drive shaft, a weight, an oscillating member, a plurality of rods connecting the pistons to the oscillating member, a pair of bevel gears and a plurality of thrust bearing assemblies wherein ... | 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 |
| 6904878 | Internal combustion engine with novel fuel/air delivery system Blower forces fuel/air mixture into bore of cylinder head against small diameter piston of compound piston assembly, forcing assembly down in engine cylinder, permitting fuel/air mixture to enter main cylinder of engine in which it is ignited. Exhaust forces assembl... | 06/14/2005 |
| 6895907 | Diesel engine In diesel engine, blower forces air into bore of cylinder head against small diameter piston of compound piston assembly forcing assembly down in engine cylinder, permitting air to enter combustion chamber. Diesel fuel injector introduces diesel fuel into combustion... | 05/24/2005 |
| 6779494 | Balanced barrel-cam internal-combustion engine A multi-cylinder internal-combustion engine where translation between piston reciprocating motion and rotational motion occurs via a pair of conjugate axial cams with dual rolling followers on the piston-assemblies—one rolling follower per conjugate axial cam. A p... | 08/24/2004 |
| 6725815 | Cam-drive engine and cylinder assembly for use therein A cam-drive engine having one or more cylinder assemblies detachably affixed to an engine core that does not include a cylinder block per se. Each cylinder assembly can be attached to or detached from the engine core without the need for disassembly of the cylinder ... | 04/27/2004 |
| 6662762 | Balanced five cycle engine with shortened axial extent A five-cycle internal combustion engine in which the transfer cycle movements of the inlet and outlet pistons in the first cylinders are accompanied by a generally equal and axially opposite transfer cycle movement of the inlet and outlet pistons in the s... | 12/16/2003 |
| 6619244 | Expansible chamber engine This engine 1 relies on a flywheel having a flywheel axis and an undulating cam surface. A piston with a roller at its base is positioned in a cylinder such that the roller abuts the undulating cam surface at some radial distance from the flywheel axis. T... | 09/16/2003 |
| 6601548 | Axial piston rotary power device An axial piston rotary power device can be configured as a four-cycle and two-cycle internal combustion engine, a compressor, a pump, a fluid-driven motor or an expander. The device includes an external stator housing, an internal axial stator and a rotar... | 08/05/2003 |
| 6601547 | Axial piston rotary power device An axial piston rotary power device has a housing enclosing a cylindrical chamber. An axially undulating guide cam is medially fixed to the inner annular wall of the chamber. A central cylindrical stator protrudes axially through the chamber from one end ... | 08/05/2003 |
| 6575125 | Dual torque barrel type engine The present invention is a barrel-type internal combustion engine. The engine is generally comprised of a plurality of cylinders arranged in in-line pairs, each in-line pair having a double headed piston therein. The cylinders are arranged surrounding a c... | 06/10/2003 |
| 6526927 | Internal combustion engine The improved internal combustion engine of the cam drive axial piston type includes modification to the drive shaft, bearings and other internal elements to facilitate the flow of oil and lubricants to engine parts. The cooling system is modified to allow... | 03/04/2003 |
| 6481393 | Internal combustion engine with compound piston assembly Compound piston assembly in cylinder of engine has small diameter piston engaging central bore in cylinder head mounted within cylinder and large diameter piston engaging cylinder. Swash plate, secured to drive shaft, engages large diameter piston. Two su... | 11/19/2002 |
| 6446587 | 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 relati... | 09/10/2002 |
