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| Number | Title | Issue Date |
| 7428886 | Two-cycle engine and compressor An oscillating lever arm engine includes rigidly connected opposing pistons moved by a single lever connected to a rotating crankshaft. When applied to a two-cycle internal combustion engine, one piston may function as a pump piston and the second piston as a workin... | 09/30/2008 |
| 7389755 | Tandem-piston engine The piston rod of the tandem-piston engine was modified to include a crosshead that slides in a crosshead guide machined into the lower part of the charger piston for better lateral support. The lower surface of the motor piston was changed to a simple conical surfa... | 06/24/2008 |
| 7383797 | Double piston cycle engine A Dual Piston Cycle Engine utilizes a unique dual piston apparatus that includes: a first cylinder housing a first piston therein; a second cylinder thermally isolated from the first cylinder and housing a second piston therein; an intake valve coupled to the first ... | 06/10/2008 |
| 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 |
| 7325528 | Method of operating a single cylinder two-stroke engine The invention is directed to a method for operating a two-stroke engine having a cylinder in which a combustion chamber is formed and which includes devices for metering fuel and supplying combustion air as well as an ignition device for igniting a mixture in the co... | 02/05/2008 |
| 7273023 | Steam enhanced double piston cycle engine A steam enhanced dual piston cycle engine utilizes a unique dual piston apparatus that includes: a first cylinder housing a first piston therein, wherein the first piston performs only intake and compression strokes; a second cylinder housing an inner power piston t... | 09/25/2007 |
| 7225769 | Two-stroke cycle engine This invention concerns a two-stroke cycle engine, more specially it concerns a two-stroke cycle engine using a preceding air-layer for scavenging. It has a scavenger passage connected to a branching scavenger passage opened to said scavenging port. The engine has a... | 06/05/2007 |
| 7188598 | Rotary mechanical field assembly An engine having a rotary member and a linear member includes a first axis about which the rotary member rotates and a second axis coupling the rotary member to an offset rotary element. The linear member is coupled to the offset rotary element by a first coupling f... | 03/13/2007 |
| 7124718 | Multi-chamber internal combustion engine An internal combustion engine includes a piston dividing a cylinder into first and second variable volume chambers on either side thereof. One chamber admits and compresses air which is delivered to another chamber for combustion. The other chamber admits combustion... | 10/24/2006 |
| 6925971 | Exhaust gas recirculation for a free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 08/09/2005 |
| 6907850 | Internal combustion engine and method of enhancing engine performance An apparatus and method to enhance the overall performance of engines in one or more of the following ways: by increasing the power output; by reducing the level of unwanted atmospheric emissions; and by reducing engine wear. The apparatus is an engine (e.g., 2-stro... | 06/21/2005 |
| 6782850 | Two stroke engine having reduced height pistons Modification to the current two-stroke cycle internal combustion engine, using reduced height piston constructed solidly with piston rods and having rotary valves installed in the transfer and exhaust ports. The piston pre-compresses the fuel-air mix in its lower pa... | 08/31/2004 |
| 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 |
| 6328002 | Misfire tolerant combustion-powered actuation The present invention provides a combustion-powered actuator that is suitable for intermittent actuation, that is suitable for use with atmospheric pressure carburetion, and that requires little electrical energy input. The present invention uses energy f... | 12/11/2001 |
| 5884590 | Two-stroke engine An oscillating lever arm engine includes rigidly connected opposing pistons moved by a single lever connected to a rotating crankshaft. When applied to a two-cycle internal combustion engine, one piston may function as a pump piston and the second piston ... | 03/23/1999 |
| 5791303 | Two-cycle internal combustion engine A two-cycle internal combustion engine comprises a cylinder with a piston, the cylinder having a port in which an intake valve is placed for feeding a fuel-air mixture from an intake manifold into an intake chamber. The intake chamber is positioned under ... | 08/11/1998 |
| 5785505 | Integral fluid pump and internal combustion engine An integral fluid pump is disposed in the cylinder head of an internal combustion engine is directly driven by an engine piston and provides fluid flow to a fluid system. First and second check valves are connected to the cylinder head and control fluid f... | 07/28/1998 |
| 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 |
| 5694891 | Internal combustion engine In an internal combustion engine having at least one working cylinder, a reciprocating working piston is connected by a piston rod to a second piston which can reciprocate in a supercharge cylinder. The common piston rod is also connected with a crank dri... | 12/09/1997 |
| 5509382 | Tandem-differential-piston cursive-constant-volume internal-combustion engine An internal-combustion engine having a main cylinder, a crosshead motor piston mounted on a piston rod, and a charger piston, which reciprocates below the motor piston and has a hole for the piston rod to slide through, is shown in full section in FIG. 1.... | 04/23/1996 |
| 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 |
| 5243938 | Differential stroke internal combustion engine An internal reciprocating engine effective to operate at one engine cycle per revolution is provided with a differential stroke piston having an inner piston part, for sealing the cylinder, operating at a cycle different from its corresponding outer pisto... | 09/14/1993 |
| 5233949 | Two-stroke cycle engine having linear gear drive A balanced motor two-stroke cycle engine having a linear drive includes a sealed gearcase secured to a cylinder housing having a plurality of concentric cylinders. The sealed gearcase includes a fixed ring gear, a pinion gear whose diameter is equal to th... | 08/10/1993 |
| 5167208 | Internal combustion engine An internal combustion engine is arranged with an elongate piston rod, with the piston fixedly mounted substantially medially of the rod, with an upper distal end of the rod including an oil reservoir chamber piston reciprocatably mounted within the oil r... | 12/01/1992 |
| 5050570 | Open cycle, internal combustion Stirling engine An open-cycle internal-combustion Stirling engine having two pistons coupled by a rhombic drive which define a combustion chamber and a compression chamber, within either a single cylinder or two cylinders, and a manifold enabling flow of the working flui... | 09/24/1991 |
| 5010852 | Heat engine A multifuel hybrid heat engine having an internal combustion system and an external combustion system wherein a coaxial array of three tappet valves controls the expansion from the external combustion system to the internal combustion system and the drive... | 04/30/1991 |
| 4915064 | Internal combustion engine with opposed pistons A combustion engine comprises a plurality of cylinders. Each cylinder contains aligned pistons displaceable toward and away from one another. Rotary cam disks are connected to a drive shaft and are arranged to be contacted by respective ones of the piston... | 04/10/1990 |
| 4858571 | Liquid pump driven by a two-cycle, dual piston internal combustion engine An internal combustion engine having as upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as the combustion chamber. A cooling jacket is provided between the two chambers to cool the seali... | 08/22/1989 |
| 4841921 | Two-cycle, dual piston internal combustion engine with air turbine driven fuel/air mixture supply An internal combustion engine having as upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as a compression chamber and the lower chamber serving as a combustion chamber. A cooling jacket i... | 06/27/1989 |
| 4829958 | Device and method for introducing pressurized gas into a combustion chamber of a reciprocating internal combustion engine A device and method for introducing pressurized gas into a combustion chamber of an engine. The device includes a duct and an intermittent obstruction member, with the placing the cylinder and the combustion chamber in communication via said obstruction m... | 05/16/1989 |
| 4785770 | Coaxial pump and motor cylinder engine A two-cycle engine having upper and lower cylindrical gas chambers controlled by an inter-chamber passageway. The lower gas chamber acts as the combustion chamber. The upper gas chamber is divided into two parts by a piston wherein the lower portion of th... | 11/22/1988 |
| 4777917 | Rotary valve engine with tandem power and supercharger sections Four power cylinders within an engine and/or cylinder block are distributed around a central bore containing a rotary valve whose axis of rotation is parallel to that of each of the cylinders. Supercharger cylinders are axially aligned with the power cyli... | 10/18/1988 |
| 4745886 | Back and forth motion type of the internal engine with the separate gas chamber and its application equipment An internal combustion engine having an upper cylindrical gas chamber and a lower cylindrical gas chamber. The upper chamber having a bottom portion serving as a compression chamber and the lower chamber serving as the combustion chamber. A cooling jacket... | 05/24/1988 |
| 4516536 | Three cycle internal combustion engine An axial piston type internal combustion engine of novel three cycle variety, wherein the complete combustion process within the combustion chamber consists of three distinct cycles, accomplished over two distinct strokes of each piston, the three cycles ... | 05/14/1985 |
| 4516539 | Internal combustion engine An internal combustion engine having a pair of opposed ignition pistons and a pump element that reciprocates coaxially in opposition to the pistons. A pair of counterbalance arms are linked to the pump element to also reciprocate in opposition to the pist... | 05/14/1985 |
| 4332229 | Double intake, supercharging I.C. engine An I.C. engine has a block, the engine forming a bore and having a crankshaft. The engine includes: (a) first and second pistons that reciprocate in that bore, (b) connection structure interconnecting the pistons, the pistons operatively connected to the crank... | 06/01/1982 |
| 4210108 | Stepped piston two-stroke engines A two-stroke internal combustion engine having a stepped piston in which the cylinder casting has a bore of greater diameter to form a pumping part, a bore of lesser diameter to form a working part, exhaust port means in the working part and opposed trans... | 07/01/1980 |
| 4206727 | Two-stroke-cycle engine having an auxiliary piston and valve arrangement, and its associated drive mechanism The invention provides a two-stroke-cycle engine which has a main piston, and an auxiliary piston and transfer valve arrangement. and its associated drive mechanism. The engine has also at least two intake valves arranged in the cylinder head. The auxilia... | 06/10/1980 |
| 4205638 | Fluid power supply system A double acting Diesel cycle hot gas engine comprising a plurality of engine cylinders, each having a free piston unit adapted to perform work, providing a continuous flow of compressed air to an energy consumption source and to a storage tank connected t... | 06/03/1980 |
| 4185597 | Self-supercharging dual piston engine apparatus Internal combustion engine apparatus includes a dual piston with a plurality of intake ports having reed type check valves.... | 01/29/1980 |
