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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7308792 | Steam power plant arrangement A steam power plant arrangement with a steam turbine and a steam generator, a condenser and a preheating system is characterized according to the invention in that the steam generator, the condenser and the preheating system are configured as individual functionally... | 12/18/2007 |
| 7309208 | Turning gear drive system A clutch assembly for a turning gear includes an overspeed clutch, an output shaft, and a centrifugal clutch. The overspeed clutch is disposed at the input shaft. The output shaft is in mechanical communication with the input shaft via the overspeed clutch. The cent... | 12/18/2007 |
| 7278422 | Open-circuit self-contained underwater breathing apparatus A self-contained open-circuit breathing apparatus for use within a body of water naturally containing dissolved air. The apparatus is adapted to provide breathable air to a diver. The apparatus comprises an inlet means for extracting a quantity of water from the bod... | 10/09/2007 |
| 7235945 | Energy conversion systems A device comprising a massfree energy receiver and means to convert massfree energy into ordinary electricity or mechanical work, including a pulsed plasma reactor driving an inertially damped drag motor. ... | 06/26/2007 |
| 7117691 | Device for controlling liquid level position within condenser in rankine cycle apparatus In a liquid-level-position control device for a condenser in a Rankine cycle apparatus, first and second reference liquid level positions are set. When a position of the fluid level is lower than the first reference liquid level position, water is replenished to a c... | 10/10/2006 |
| 7112892 | Power source for sensors A sensor is placed in wireless communication with a monitoring system. Power for the sensor is generated by scavenging power from fluid flow within a pipe. ... | 09/26/2006 |
| 6952925 | Optimizing inlet air for gas turbines Air intake temperature in a gas turbine is regulated by a heat exchange fluid having a low viscosity at low temperatures. The circulated heat transfer fluid preferably comprises an alkali metal formate, most preferably potassium formate. The potassium formate may be... | 10/11/2005 |
| 6918254 | Superheater capillary two-phase thermodynamic power conversion cycle system A two-phase thermodynamic power system includes a capillary device, vapor accumulator, superheater, an inline turbine, a condenser, a liquid pump and a liquid preheater for generating output power as a generator. The capillary device, such as a loop heat pipe or a c... | 07/19/2005 |
| 6810678 | Internal combustion engine An internal combustion engine includes an insulated combustion chamber having a fuel mixture inlet and a spark plug nearby the inlet. A series of baffles is configured within the combustion chamber to absorb a shockwave caused by ignition of fuel mixture by the spar... | 11/02/2004 |
| 6247309 | Cylinder piston unit, especially for steam engines The invention relates to a cylinder piston unit, especially for steam engines with expansion by heat influx, which is constructed as follows: a piston guided in the cylinder element has a displacer, a heating device is mounted on the cylinder element for ... | 06/19/2001 |
| 5870895 | Compact closed-loop brayton cycle rotating machine, propulsion system comprising a machine of this kind, and vehicle provided with propulsion means of this kind A closed-loop Brayton cycle rotating machine is provided with a sealed circuit in which a working fluid flows. This circuit comprises a compressor for compressing the working fluid, a hollow cylindrical recovery heat exchanger for preheating the compresse... | 02/16/1999 |
| 5632147 | Solar powered steam turbine generator A solar steam generator has a hollow steam rotor mounted for rotation in a closed compartment located within a larger housing. The rotor is made of heat conductive material and is supplied with water or other working fluid through an inlet at its central ... | 05/27/1997 |
| 5606859 | Integrated steam motor This invention is directed to an engine having an external combustion chamber for creating a vapor under high pressure. The vapor under high pressure is introduced to a high pressure cylinder for moving a high pressure piston. The vapor, upon leaving the ... | 03/04/1997 |
| 5373698 | Inert gas turbine engine An inert gas turbine engine contains a working fluid closed loop system leading from an expansion turbine which is in fluid flow relationship with an expansion chamber. Working fluid within the expansion chamber is heated by the combustion of compressed a... | 12/20/1994 |
| 5359971 | Rotary steam/internal combustion engine and rotary hydraulic motor A self starting, quick start-up rotary steam/internal combustion engine and a rotary hydraulic motor, with a positive displacement, powered through 360° of each revolution and comprising: a flattened cylindrical flywheel with two diametrically opposed, r... | 11/01/1994 |
| 5353596 | Low temperature heat engine A relatively hot and a relatively cold chamber are air evacuated and contain a low boiling point liquid. The temperature differential between the chambers results in a vapor pressure differential between the chambers. The vapor pressures inside the chambe... | 10/11/1994 |
| 5181378 | Vapor generator apparatus for powering a motor A vapor generating system for supplying vapor energy to power a motor and employing the energy in the vapor exhausted by the motor to operate an air pump for supplying air to mix with a source of fuel in a combustion space in a chamber which collects vapo... | 01/26/1993 |
| 5038568 | System for reheat steam temperature control in circulating fluidized bed boilers A steam generator having a fluidized bed combustion system that includes a fluidized bed combustor and at least one hot separator, includes a superheater and a reheater with at least first and second or final stages disposed in a flue gas pass with the su... | 08/13/1991 |
| 5010735 | Centrifugal heat engine and method for using the same A centrifugal heat engine comprises a first member rotatably mounted on a second member. The first member has an annular chamber on its periphery containing a vaporizable working fluid, and a central chamber separated from the annular chamber by a bulkhea... | 04/30/1991 |
| 4945731 | Absorbing fluid receiver for solar dynamic power generation and solar dynamic power system A receiver is described for a solar dynamic power generator. The generator has a heat cycle engine to generate power. The receiver has a working fluid including a radiant eneryg absorber selected from halogens and interhalogens. The receiver also has a ho... | 08/07/1990 |
| 4920751 | System and method for reheat steam temperature control in circulating fluidized bed boilers A steam generator having a fluidized bed combustion system that includes a fluidized bed combustor and at least one hot separator, includes a superheater and a reheater with at least first and second or final (possibly more) stages disposed in a flue gas ... | 05/01/1990 |
| 4864826 | Method and apparatus for generating power from a vapor There is provided an apparatus and method for generating power from a working fluid wherein the working fluid is a saturated vapor or superheated vapor generated in a high pressure zone where the working fluid is used to impart work to a working shaft by ... | 09/12/1989 |
| 4805407 | Thermomechanical electrical generator/power supply for a downhole tool A downhole tool for an oil or gas well includes a self-contained power supply having a housing in which a primary fuel source, a Stirling cycle engine, and a linear alternator are disposed. The primary fuel source includes a radioisotope which, by its rad... | 02/21/1989 |
| 4738111 | Power unit for converting heat to power A modular, frame-mounted power unit for converting heat from a low-grade energy source to electric power. Heat from a source is supplied to the power unit in the form of hot fluid circulated through a heat exchanger associated with a boiler. Liquid refrig... | 04/19/1988 |
| 4733537 | Turbine power plant with steam and exhaust turbine systems A turbine power plant consisting of a closed loop steam turbine system and a closed loop exhaust turbine system. An external fuel source is used to drive the steam turbine system. The heat energy of the hot exhaust fluid of the steam turbine system is tra... | 03/29/1988 |
| 4696618 | High temperature seal and turbine mount The outlet 38 of a turbine housing 18 may be sealed to a port 46 while at the same time mounting a turbine 10 and associated transmission 36 for vibration and shock isolation by locating elastomeric seal and turbine mounts 50, 52 on opposed walls 28 and 3... | 09/29/1987 |
| 4693087 | Method of generating power from a vapor There is provided a method for generating power from a working fluid wherein the working fluid is a saturated vapor or is superheated to a vapor and then passed to a high pressure zone where the working fluid is used to impart work to a working shaft by m... | 09/15/1987 |
| 4603554 | Method and apparatus for extracting useful energy from a superheated vapor actuated power generating device The invention disclosed herein relates to an improved method and apparatus for extracting useful energy from the superheated vapor of a working fluid by a vapor actuated power generating device. The apparatus utilized includes a high pressure vessel which... | 08/05/1986 |
| 4599864 | Gas engine with gas supply device A gas engine with a gas supply device contains a substantially bell-shaped aluminum intermediate housing open on one side and provided with fins on the interior and exterior. A cylinder of the gas engine with good thermal conduction properties and a sleev... | 07/15/1986 |
| 4546608 | Thermo-siphon type generator apparatus A thermo-siphon type generator apparatus making use of a gravity-type heat pipe in which a working medium is cyclically evaporated and condensed. The apparatus has a closed vessel filled with the working fluid and defining a lower evaporating section, an ... | 10/15/1985 |
| 4519212 | Boiler-driven power generator A boiler driven power generator comprises a power generator directly driven by the expanded steam vapor inside a vaporizing chamber of a boiler to save energy as friction loss caused by the expanded steam vapors during vaporization.... | 05/28/1985 |
| 4494379 | Vapor driven power system A vapor driven heat engine utilizing a working medium boiling at less than ambient temperature and atmospheric pressure. A heat source vaporizes the medium in a boiler with the vapor being transferred to an insulated vapor header reciprocating a piston in... | 01/22/1985 |
| 4471621 | Method and apparatus for draining liquid working fluid from turbine cannister of a closed cycle power plant Liquid working fluid is drained from the sump of the cannister of a power plant of the type described by transferring the working fluid to the condenser rather than to the boiler. In one embodiment of the invention, liquid in the sump is drained by gravit... | 09/18/1984 |
| 4463555 | Electro-dynamic power converter An electro-dynamic power converter for transforming the kinetic energy of a moving stream of water into rotary power is disclosed. A turbine rotor is received within a power flow housing and has turbine blades for imparting a mechanical turning force on t... | 08/07/1984 |
| 4422299 | Flash system power generator A light weight self-cleaning safety flash system power generator is devised wherein: a plenum is formed enclosing a low pressurized combustion process, a light weight low pressure heat exchanger capable of safely receiving a fluid at low pressure for mass... | 12/27/1983 |
| 4399657 | Steam generation system Steam generation means in a closed system having a pressured steam boiler positioned within a closed heated feed water chamber. The steam generated in the boiler is used to drive a turbine and an associated electrical generator whose output augments the o... | 08/23/1983 |
| 4395885 | Unitary steam engine Disclosed herein is a steam engine suitably constructed to serve as a prime mover. The device includes a furnace in which a liquid can be heated so as to change its phase, the thus formed gas directed to an engine whereupon its expansion within piston/cyl... | 08/02/1983 |
| 4380153 | Total energy heating unit A total energy heating unit which provides not only heat but also hot water and electricity is set forth. A single source of fuel is used such as coal, wood, or even compact dry leaves. The fuel is burned in an airtight firebox surrounded on three sides b... | 04/19/1983 |
| 4375154 | Air heating system A self-starting, fuel-fired, air heating system including a vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is con... | 03/01/1983 |
| 4372126 | Closed cycle system for generating usable energy from waste heat sources A closed cycle system for generating usable energy from heat sources wherein the available temperature difference between the heat source and the heat sink is 40° F. or greater such as in tropical ocean waters having a temperature gradient between the su... | 02/08/1983 |
