Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7441534 | Rotary engine system This rotary internal combustion engine has two rotatable vane type pistons mounted for axial rotation in a sealed casing. In an exemplary cycle, one piston is released to rotate at or prior to initiating combustion in the combustion space between the two pistons, wh... | 10/28/2008 |
| 7431007 | Apparatus adapted to perform as compressor, motor, pump and internal combustion engine A rotary apparatus with an enclosure formed by a hollow curved housing along with two sleeves, with two vanes within the enclosure, where one vane is fitted on each sleeve and the space within the enclosure is partitioned into two segregated volumes by the vanes whi... | 10/07/2008 |
| 7415962 | Internal combustion engine An internal-combustion engine comprises an engine housing having a first wall delimiting a first combustion chamber, a first piston also delimiting said first combustion chamber and with a first piston head, a first crankshaft, a second piston also delimiting said f... | 08/26/2008 |
| 7364415 | Twin piston fluid compressor or pump apparatus with an annular bore housing An apparatus to pump fluid comprises an annular bore (12) and at least one pair of pistons (15, 16) which travel along the bore (12). The pistons (15, 16) can be releasably locked to a rotating plate like member (14) to travel thro... | 04/29/2008 |
| 7347676 | System for the construction of pumps, compressor, and motor engines, formed by a rotary chamber and pistons which are driven in the same direction at varying velocities alternatively opposite to each other, inside a fixed open or closed structure A system includes a rotary chamber and pistons that move in the same direction at varying and alternatively opposite velocities to each other inside a fixed structure. The chamber is rotatively formed by two rotary partial-chambers, each partial-chamber having a pis... | 03/25/2008 |
| 7341041 | Toroidal engine with variable displacement volume A novel rotary engine of the kind having a toroidal cylinder and a set of pistons on a rotating circular piston assembly provides instantaneous adjustment of the displacement volume of the engine by varying the intake and expansion stroke length on the circular path... | 03/11/2008 |
| 7342973 | Method and apparatus for adapting multi-band ultra-wideband signaling to interference sources A method and apparatus for operation in a multi-frequency band system in the presence of an interference, the method comprising the steps of: receiving signaling in a plurality of wideband frequency sub-bands, each wideband frequency sub-band having a different cent... | 03/11/2008 |
| 7305937 | Rotary toroidal machine with piston connecting mechanism A rotary machine includes a housing divided into a first stationary portion and a second rotational portion. The second rotational portion is supported for rotation with respect to the stationary portion about an axis of the housing. The first and second portions of... | 12/11/2007 |
| 7258082 | Oscillating-piston machine An oscillating-piston machine comprises a housing, in which a first and at least a second piston are arranged, which pistons can together revolve in the housing about an axis of rotation that is fixed with respect to the housing, and which pistons, as they revolve a... | 08/21/2007 |
| 7255086 | Rotary internal combustion engine The invention can be used for transport means, sports cars and power plants. The inventive engine comprises a hollow toroidal working cylinder provided with a continuous circular slot embodied along the small diameter thereof, a nozzle or a spark plug and arc-wise e... | 08/14/2007 |
| 7222601 | Rotary valveless internal combustion engine A rotatably alternating air or water cooled two-stroke internal combustion engine comprising a cylindrical casing, and a rotor comprising two radially extending vanes affixed to a shaft rotatably mounted within the casing upon two end plates. Two longitudinally exte... | 05/29/2007 |
| 7210373 | Crankshaft for a v-type internal combustion engine A crankshaft (1) includes a first to a sixth crank pin (41–46), a first to a fourth main journal (21–24) and a first to a ninth crank arm (61–69). At least the first, the second, the eighth and the ninth crank arms (61, 62, 68, 6... | 05/01/2007 |
| 7187903 | Method and apparatus for timing correction in communication systems In a wireless communications system, transceivers transmit short bursts to a base station, which determines timing corrections from the time of receipt of the burst and transmits the timing corrections to the respective transceivers. In one aspect, the base station ... | 03/06/2007 |
| 7156068 | Rotary combustion engine The aim of the invention is to dispense with the disadvantages of previous engines either fully or partially. This is achieved by two cylindrical parts which rotate into each other, respectively possessing a wing and which can rotate about an axis of different speed... | 01/02/2007 |
| 7070402 | Integrated speed reducer and pump assembly An integrated speed reducer and gerotor pump is disclosed. The device comprises a motor, a speed reducer, and a gerotor pump. The motor provides torque at an elevated speed. The speed reducer is coupled with the motor and converts the torque at an elevated speed int... | 07/04/2006 |
| 7031295 | System and method for minimizing guard time in a time division duplex communication system Disclosed is a system and method for optimizing capacity in a multi-user time division duplex (“TDD”) communication system such as a broadband wireless radio frequency communication system. More specifically the invention minimizes guard time in duplexed signals... | 04/18/2006 |
| 7032080 | Plural station memory data sharing system A plural station memory data sharing system in which packets are sent/received between plural stations interconnected through communication lines. Each station has a unique station address value, and the time is made to correspond to each station address value. The ... | 04/18/2006 |
| 6962137 | Two-cycle rotary engines Two-cycle, single vane impeller, hinged hub rotary engines are simple embodiments of a new class of engines. The 2-cycle, hinged hub rotary engines have dependently rotating impellers with, interdigitated, alternating hub sections, a hinge like rotation joint. These... | 11/08/2005 |
| 6948473 | 4-cycle, rotary, electromagnetic, internal combustion engines Four-cycle rotary engines, with an even number of hinged-hub impeller vanes, utilize dependently rotating, joined, hinged-hub impellers, with interdigitated, alternating hub sections, on a shared, power output shaft, and electromagnetic fields, and timing of impelle... | 09/27/2005 |
| 6944249 | Method and system for transmitting isochronous voice in a wireless network In one aspect the present invention describes an electronic circuit for transmitting voice packet data over a wireless network with an upstream transmission mode and a downstream transmission mode. The circuit comprises a first phase-lock loop (PLL) for locking a fi... | 09/13/2005 |
| 6886527 | Rotary vane motor A rotary vane motor uses a gear train arrangement for controlling the position of the vanes as well as the compression ratio of the motor. The motor includes a first pair of vanes namely a leading and trailing vane defining a working chamber therebetween and an oppo... | 05/03/2005 |
| 6880494 | Toroidal internal combustion engine Toroidal internal combustion engine comprising two concentric engine rings. Intake valves are assembled in two faces of one set of pistons and exhaust valves in two faces of the second set of pistons. The intake-valve pistons are fixedly attached to one of the engin... | 04/19/2005 |
| 6739307 | Internal combustion engine and method Internal combustion engine and method in which pistons on different rotors move relative to each other to form chambers of variable volume in a toroidal cylinder. The pistons move in stepwise fashion, with the pistons on one rotor travelling a predetermined distance... | 05/25/2004 |
| 6461127 | Fixed displacement suction and exhaust apparatus utilizing rotary pistons of coaxial structure There is provided a fixed displacement suction and exhaust apparatus using coaxial rotary pistons, which can be used for various kinds of compressors, vacuum pumps, fluid transfer pumps or internal combustion engines. In the suction and exhaust apparatus,... | 10/08/2002 |
| 6457451 | Rotary piston engine A rotary piston engine (20) is shown that includes a housing (22) having a toroidal working chamber with inlet (56) and exhaust (54) ports. First and second piston assemblies (30 and 32), each of which includes at least one pair of diametrically opposed p... | 10/01/2002 |
| 6422841 | Cat and mouse type rotary device utilizing grooves and rods for power conveyance A cat and mouse type device includes at least one rod fixed to a shaft with at least one planetary gear rotatably attached to an end of the rod. Bars extending away from the planeatary gear ride in grooves on the faces of two rotors. The planetary gear ro... | 07/23/2002 |
| 6371743 | Rotary internal combustion engines A toroidal engine [20] is provided having opposed rotor assemblies [45] supporting pistons [47] arranged on each rotor assembly [45]. Part toroidal working chambers are formed between the pistons [47] in which a combustible mixture of air and fuel is comp... | 04/16/2002 |
| 6341590 | Rotary engine A rotary engine including a static toroidal cavity having an inlet port for introducing fuel and air to the cavity and an outlet port for exhausting products of combustion from the cavity. A first power train including a first output shaft and a second po... | 01/29/2002 |
| 6321693 | Reciprocating rotary piston system and pressure pump and internal combustion engine using the same A reciprocating rotary piston system includes a cylinder (3) having an annular and hollow interior; a plurality of pistons (1A to 1D) of which first and second parties are formed to be disposed alternately on the same inner circumference of the cylinder, ... | 11/27/2001 |
| 6305345 | High-output robust rotary engine with a symmetrical drive and improved combustion efficiency having a low manufacturing cost An oscillatory scissor type rotary engine having two rotors wherein first and second rotor drive mechanisms are located on first and second opposite sides of the engine respectively, each rotor drive mechanisms including a carrier bowl that is rigidly fix... | 10/23/2001 |
| 6299423 | Scroll machine with discharge valve A compressor includes a normally open discharge valve assembly for controlling compressed refrigerant flow from the discharge chamber through the compression members. This controlling of flow results in an increased performance for the compressor by reduc... | 10/09/2001 |
| 6293775 | Small robust rotary internal combustion engine having high unit power and low manufacturing costs In a small oscillatory type rotary piston engine, first and second rotors are provided, having first and second independently rotatable drive shafts. An engine output shaft is affixed to a rotatable carrier bowl member which carries a pair of rockers coup... | 09/25/2001 |
| 6276329 | Rotary machine A rotary machine, usable as an engine or as a pump, has a toroidal cylinder (25) which is swept by continuously rotating disc-like piston (34). The cylinder has a double disc valve arrangement (42, 44) at one point, so that it can be divided into a compre... | 08/21/2001 |
| 6257196 | Rotary disc engine A rotary internal combustion engine comprising a generally cylindrical shaped rotor housing, a pair of cylindrical shaped rotary discs having inner and outer concentric members and a plurality of spaced apart vanes connecting the inner and outer concentri... | 07/10/2001 |
| 6210135 | Internal combustion rotary engine An internal combustion rotary engine includes a stationary, centrally located manifold having an intake and an exhaust port. Inner and outer rotor assemblies are provided which rotate in a common direction about the centrally located manifold. Each of the... | 04/03/2001 |
| 6158987 | Power unit for use as a pressure-fluid operated motor and/or a pressure fluid pump A power unit for use as a pressure-fluid-operated motor and/or a pressure fluid pump, the power unit comprising a cylinder space, pistons movable in the cylinder space and channels for pressure fluid. The cylinder is annular and the pistons extend radiall... | 12/12/2000 |
| 6071098 | Rotary internal combustion engines A toroidal engine [20] is provided having opposed rotor assemblies [45] supporting pistons [47] arranged on each rotor assembly [45]. Part toroidal working chambers are formed between the pistons [47] in which a combustible mixture of air and fuel is comp... | 06/06/2000 |
| 5816788 | Rotary engine having a transmission including half-pinions and cams A rotary engine, has a stationary casing having an internal cylindrical surface with an axis, two substantially identical cylindrical rotors rotatable about a common axis coinciding with the axis of the cylindrical surface in a start mode and a stop mode ... | 10/06/1998 |
| 5800138 | Extracorporeal blood pump for cardiac surgery An extracorporeal blood pump for cardiac surgery is disclosed having a housing with a cylindrical cavity, radially-spaced input and output ports and a pair of radial blades within the cavity. The blades are supported on independent, concentric axles such ... | 09/01/1998 |
| 5740765 | Rotary piston internal combustion engine A rotary piston internal combustion engine includes a housing defining a cylinder chamber in the form of a circular ring. An even number of pistons circulate in the piston chamber and are of a circular cross-section adapted to the cylinder chamber. Two pi... | 04/21/1998 |
