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 |
| 7520251 | Non-reciprocating internal combustion engine A piston type internal combustion engine having a fixed position stub shaft mounted on a base. The piston, piston pin and piston rod rotate about this fixed position shaft. The piston assembly does not reciprocate. The cylinder block assembly is mounted to an output... | 04/21/2009 |
| 7421986 | Rotary radial internal combustion piston engine The engine comprises a housing, a rotor, which is mounted in the housing for rotation about its axis. The rotor has a pair radially opposite cylinders spaced radially and apart from its axis of rotation. A piston spaced in each of the cylinders. Gas intake and gas e... | 09/09/2008 |
| 7353784 | Rotary internal combustion engine A rotary internal combustion engine has a circular inner chamber, which houses a plurality of cylinders with reciprocating pistons that move in a radial direction towards and away from the center of the inner chamber. A flywheel with distinct vanes or portions is po... | 04/08/2008 |
| 7308869 | Radial compression-ignition engine A compression-ignition internal combustion engine for aircraft generally comprises a stationary crankshaft, a crankcase adapted to rotate about the stationary crankshaft, and a plurality of cylinders radially extending from the crankcase. Each cylinder includes a pi... | 12/18/2007 |
| 7258084 | Explicit seals for moving cylinder assembly A moving cylinder assembly includes an end ported moveable cylinder having a chamber for receiving and engaging a piston connected to at least one crank. A stationary housing embraces the cylinder and has at least one port for intermittent communication with the cyl... | 08/21/2007 |
| 7219631 | High torque, low velocity, internal combustion engine An Internal Combustion Engine including a plurality of reciprocating pistons disposed about the periphery of a central housing, and a pair of drive cams responsive to the displacement of the pistons for driving one or more output drive shafts. A piston rod cross mem... | 05/22/2007 |
| 6994071 | Two-cycle engine for counter-rotation especially for aviation applications A counter-rotating 2 cycle piston engine with a combustion chamber and an output shaft rotatably mounted to rotate independently about the same propeller centerline of an aircraft. The Internal combustion power is transmitted to the output shaft by means of a conven... | 02/07/2006 |
| 6895906 | Rotary two-stroke engine A rotary two-stroke engine including a multi-cylinder block rotatably mounted on two main bearings within an engine housing, a crankshaft journalled for rotation within said main bearings, indirectly geared at a ratio of 2:1 to said cylinder block and piston members... | 05/24/2005 |
| 6591791 | Spark-ignition rotary internal-combustion engine A spark-ignition rotary internal-combustion engine, having a plurality of pistons (7) which perform a reciprocating motion inside cylinders (6) arranged so as to be equally angularly spaced on a same circumference, the cylinders (6) being formed in a rota... | 07/15/2003 |
| 6148775 | Orbital internal combustion engine An orbital internal combustion engine including a pair of rigidly interconnected opposed cylinders having a pair of rigidly interconnected pistons reciprocally mounted therein with the pistons each including a rigid piston rod rotatably journaled to a cra... | 11/21/2000 |
| 6079376 | Fuel-injected piston combustion engine A fuel-injected piston combustion engine with centrally rotating cylinder block and cylinder arranged centrally therein, the rotating cylinder block being surrounded by a stationary housing which seals it off by sealing rings, the housing being provided w... | 06/27/2000 |
| 5758609 | Rotary type internal combustion motor An internal combustion rotary engine with multiple cylinders and rotary crankcase supported on a pair of engine stub shafts. The connecting rods are each connected to a different center arranged evenly around the drive center of a stepdrive element. The s... | 06/02/1998 |
| 5720241 | Rotary cylinder engine A rotary cylinder machine, designed as a two-cycle internal combustion engine or as a compressor, includes in a housing (1) a cylinder rotor (5) that rotates about a first axis of rotation (7) and has three pairs of cylinders (13), the cylinders of each p... | 02/24/1998 |
| 5682843 | Rotary engine A two cycle radial engine assembly 10! includes a crankcase assembly 12! supporting an annular cylinder closure means 23! having a part-spherical sealing surface 26! against which the correspondingly formed outer ends of cylinders 19!, disposed ... | 11/04/1997 |
| 5375564 | Rotating cylinder internal combustion engine The reciprocating engine which is particularly useful as an internal combustion engine, comprises a housing (1) with, mounted to rotate about a first axis of rotation (7), a cylinder rotor (5) having three pairs of cylinders (15) which are angularly offse... | 12/27/1994 |
| 5303679 | Rotary internal combustion engine This engine includes an engine block rotatably mounted on a support and including a central chamber communicating with outwardly protruding radial piston chambers closed by cylinder heads. A crank shaft is rotatably mounted in the engine block parallel to... | 04/19/1994 |
| 5070825 | Rotating piston diesel engine An internal combustion engine (20) has a plurality of pistons (106) reciprocating within cylinders (34) and means to translate the reciprocating motion of said pistons into rotary motion. As the cylinders (34) rotate in an engine cavity (49) about a drive... | 12/10/1991 |
| 4912923 | Double-rotor rotary engine and turbine This invention makes use of the combined advantages of the internal combustion engine and the turbine. A rotary internal combustion engine has a base and a housing rotatably mounted to the base and forming a radial cylinder. An output shaft is rotatably m... | 04/03/1990 |
| 4836149 | Rotating cylinder block piston-cylinder engine A rotating cylinder block piston-cylinder engine has a stator, a hollow rotor housing rotatably mounted on the stator means for rotation around a rotor housing axis of rotation, a plurality of cylinders radially positioned in the peripheral wall of the ho... | 06/06/1989 |
| 4649801 | Compound displacement mechanism for simplified motors and compressors A rotating and reciprocating positive displacement mechanism which draws in a metered volume of gas and then expands or compresses that quantity of gas before expelling it. The mechanism has useful application as a compressor, a compressed gas motor, an e... | 03/17/1987 |
| 4625683 | Rotating cylinder internal combustion engine A rotary internal combustion engine having a plurality of radially aligned cylinders collectively supported for common rotation about a shaft member having one portion with a first axis, with a piston block including a piston for each of the cylinders sli... | 12/02/1986 |
| 4612882 | Rotating cylinder internal combustion engine A rotary internal combustion engine having a plurality of radially aligned cylinders collectively supported for common rotation about a first axis, with a piston block including a piston for each of the cylinders slidable within each cylinder and supporte... | 09/23/1986 |
| 4478179 | Radial piston engines An internal combustion engine combines the efficiency of a radial engine with the practicality of a piston and crankshaft arrangement. A stationary frame supports a stationary sun gear, and a rotor is pivoted about the axis of the sun gear. The rotor carr... | 10/23/1984 |
| 4425880 | Rotating cylinder internal combustion engine Internal combustion engine having a rotating closed cylinder housing mounted to a fixed frame and means to harness the rotation of the cylinder housing to rotate an output shaft. The cylinder housing contains a double ended piston to define two combustion... | 01/17/1984 |
| 4407239 | Rotary engine An internal combustion rotary engine in which only a single spark plug is utilized to ignite fuel/air mixture located within a single cylinder. Within the cylinder is located a pair of pistons mounted in a back-to-back relationship. A power output shaft i... | 10/04/1983 |
| 4377136 | Rotary piston engine An engine including a piston yoke assembly reciprocating within a rotor assembly disposed for rotation within a fixed casing. The rotor assembly is of elliptical configuration to form a pair of exhaust chambers located between the assembly and the casing ... | 03/22/1983 |
| 4318370 | Rotary internal combustion engines A rotary internal combustion engine comprises a rotor assembly which is mounted to rotate about an axis of rotation and comprises a double-headed piston member having two primary pistons at opposite ends respectively of an intermediate portion of the pist... | 03/09/1982 |
| 4308836 | Manifold for rotary engines A cylindrical manifold consisting of two sections back to back, each section having various chambers, the first section having an intake and compression chamber and the second section having an intake, combustion, and exhaust chamber.... | 01/05/1982 |
| 4307695 | Rotary engine Disclosed is a rotary engine comprising a rotor, a plurality of pistons angularly mounted in the rotor, an actuator mounted for eccentric rotation relative to the axis of rotation of the rotor, a blower, a transverse actuator pin connecting each piston to... | 12/29/1981 |
| 4300487 | Rotary engine A lightweight rotary engine of novel design having a sealed inner portion that allows the engine to assume any attitude during operation. The bottommost portion of each piston contains a bearing roller that is urged against a fixed eccentric post which ca... | 11/17/1981 |
| 4291651 | Internal combustion engine A pump supplies pressurized lubricant to an internal combustion engine from an external reservoir through a closed loop system. Delivery channels extending through the crankshaft, connecting rod and other components, supply the pressurized lubricant to th... | 09/29/1981 |
| 4249487 | Rotary internal combustion engine A rotary internal combustion engine is provided with a central housing having a plurality of cylinders radially disposed around the housing. The cylinders are disposed about the housing such that reciprocal movement of pistons inside of the cylinders resu... | 02/10/1981 |
| 4178885 | Rotary piston/cylinder engines A rotary piston/cylinder engine comprises a rotor assembly which is mounted to rotate about an axis of rotation and comprises a double-headed piston member and a double-headed cylinder member defining two cylinders in which two pistons of the piston membe... | 12/18/1979 |
| 4136646 | Two cycle rotary internal combustion engine A two cycle rotary internal combustion engine of the fuel injection type. A rotor having three radially disposed cylinders in equally spaced angular relation in a circular rim rotates in sealed relation within a cylindrical stationary outer housing. The r... | 01/30/1979 |
| 4109618 | Rotary piston power converting devices This invention provides a power converting device capable of use as a pump and as a motor. The device includes a rotor shaped like a disc and secured to a shaft about which it rotates. Provided in the rotor are a plurality of piston chambers extending fro... | 08/29/1978 |
| 4094278 | Two-stroke combustion engines A two-stroke combustion engine with intake and exhaust ports which are indirectly or directly controllable in accordance with the reciprocating motion of a working piston in a cylinder space, wherein at one side of the piston there is a working chamber ac... | 06/13/1978 |
| 4078529 | Rotary engine A radial engine with a rotating cylinder block is disclosed which is capable of high rates of rotation although operating on the two stroke cycle. An intake air compressor and an exhaust driven turbine are provided, both in driving connection with the sam... | 03/14/1978 |
| 4077365 | Expansible chamber apparatus Expansible chamber apparatus for use either as an internal combustion engine or as a pump comprising a stationary housing, a cylinder block rotatable within the housing about a central axis, a shaft secured to and rotatable with a cylinder block with the ... | 03/07/1978 |
| 4038948 | Rotary internal combustion engine A rotary engine for two cycle operation having arcuate combustion chambers formed in a rotor and correspondingly arcuate pistons mounted for swinging reciprocation in the combustion chambers on connecting rods pivoted to the rotor. The housing contains th... | 08/02/1977 |
| 4038949 | Rotary-radial internal combustion engine A rotary-radial internal combustion engine wherein a piston-containing cylinder housing and cam means are mounted in an engine housing for relative rotary motion with respect to each other; said cylinder housing including diametrically opposite combustion... | 08/02/1977 |
