Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7428885 | Rotary engine employing undulating ramp driven by paired reciprocating pistons A rotary gasoline engine has two sets of pistons, which move reciprocally. The reciprocal output of said pistons is coupled to an undulating ramp, which converts the reciprocal motion to rotary motion. The engine casing has a hollow center though which no shaft runs... | 09/30/2008 |
| 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 |
| 7210429 | Rotating positive displacement engine An engine including a stationary housing; a cylinder bank rotatably mounted to the housing about a central longitudinal axis, the cylinder bank having a plurality of cylinders therein radially distanced from and parallel to the central longitudinal axis, each cylind... | 05/01/2007 |
| 6988441 | Rotary engine An engine includes a rotatable member with one or more cylinders disposed tangentially around its circumference. There are one or more corresponding pistons, each piston is associated with a piston lever pivoted eccentric to the rotatable member. Movement of each pi... | 01/24/2006 |
| 6928965 | Reciprocating piston engine comprising a rotative cylinder A reciprocating piston engine includes a rotor housing for transferring torque to an engine output drive; a contoured guide element in the rotor housing, having a closed, curvilinearly contoured shape, around which the rotor housing is rotatable; at least one compre... | 08/16/2005 |
| 6796285 | Internal combustion engine An internal combustion engine that has a torque wheel mounted for rotation within the central cavity defined by the housing and driving a crankshaft. The torque wheel has a plurality of arms in a spaced arrangement about the center of the torque wheel, thereby defin... | 09/28/2004 |
| 6705202 | Rotary engine An engine includes a rotatable member with one or more cylinders disposed tangentially around its circumference. There are one or more corresponding pistons, each piston is associated with a piston lever pivoted eccentric to the rotatable member. Movement of each pi... | 03/16/2004 |
| 6688276 | Internal combustion engine of circular impulsion The engine includes a cylindrical rotor, set up in the interior of a stator, limited by two flat surfaces forming a first chamber to provided the admission phase and the compression phase and another chamber to provided the expansion phase (D1) and the ex... | 02/10/2004 |
| 6637383 | Pivoting piston rotary power device A rotary power device of the swinging piston type has a cylindrical rotor mounted between internal and external portions of a stator. The internal stator provides intake and exhaust channels and may hold an igniter. The external stator includes two axiall... | 10/28/2003 |
| 6619243 | Pivoting piston rotary power device A rotary power device of the swinging piston type comprises a cylindrical rotor mounted between internal and external portions of a stator. The internal portion of the stator provides intake and exhaust channels and may hold an igniter. The external porti... | 09/16/2003 |
| 6431139 | Oscillating-piston engine An oscillating-piston engine, comprising a housing, in which several pistons configured as two-armed levers are arranged pivotably, respectively, around a pivot axis being parallel to a central housing axis and moving commonly in a revolution direction. T... | 08/13/2002 |
| 6016737 | Transmission The present invention is for a means for transmission of force whereby linear movement is transferred into rotating movement or reverse. The invention is primarily intended to be used by combustion engines. The invention is for a means to transmit force b... | 01/25/2000 |
| 5813372 | Axial piston rotary engine A rotary internal combustion engine of the type having pistons mounted for reciprocatory movement in respective cylinders which are arranged in equally-spaced relationship around a longitudinal axis of rotation, said axis being the axis of rotation of an ... | 09/29/1998 |
| 5351657 | Modular power unit A rotary power device of modular construction is disclosed in which one or more pistons are reciprocably received in a cylinder sleeve, and the sleeve is rotatably supported in a bore within a housing. A cam and follower mechanism acting between the housi... | 10/04/1994 |
| 4573437 | Self-propelled vehicle A self-propelled vehicle includes a body and a set of four internal-force generating devices, in the form of radial piston engines. Each device has a central axis about which some internal portions rotate. The four devices are configured in two opposed pa... | 03/04/1986 |
| 4259929 | Rotary internal combustion engine A rotary internal combustion engine comprising a rotatable gear ring disposed between axially spaced first and second casings, the gear ring having teeth disposed internally thereon, piston-cylinder units fixed to the gear ring and moveable therewith, fir... | 04/07/1981 |
| 4177771 | Rotary engines with free reciprocating-rotating pistons and jet thrust drive Rotary power engines driven by explosive or expansive media have pistons which reciprocate in cylinder cavities of a rotor at opposite sides of the rotor axis and which contact the walls of a stator by means of rollers. The rotor is turned by the reactive... | 12/11/1979 |
| 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 |
| 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 |
| 3968776 | Rotary crankless machine A rotary crankless machine in which there is a rotary shaft, a rotary cylinder block, and a stationary housing, all concentrically disposed about a common axis and in which the housing has a central annular manifold block with inlet and outlet passages di... | 07/13/1976 |
