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| Number | Title | Issue Date |
| 6406522 | Dual mode air treatment apparatus and method An apparatus and system, as well as corresponding methods of operation and treatment of air, are provided which make use of a rotatable desiccant bed such as to permit the effective and selective alternative reduction of humidity of incoming air or energy... | 06/18/2002 |
| 6329783 | Apparatus for continuously variable speed electric motor applications An electric motor and its controller are specially adapted for variable speed applications. The stator of the motor has its main windings controlled by triacs. The triacs are placed to allow the main windings to operate in series at low speed and in paral... | 12/11/2001 |
| 6329785 | Pulse width modulated controlled induction motor A commercial application for a four-step switching PWM single phase AC controller for a load such as an induction motor or the like has a digital microcontroller for PWM signal generation and enhanced MOSFET switching control, and provides a multiplicity ... | 12/11/2001 |
| 6326096 | Solid oxide fuel cell interconnector A solid oxide fuel cell interconnector having a superalloy metallic layer with an anode-facing face and a cathode-facing face and metal layer on the anode-facing face of the superalloy metallic layer. The metal layer is a metal which does not oxidize in a... | 12/04/2001 |
| 6314793 | Test device for measuring chemical emissions A test device for measuring chemical emissions to the atmosphere from a leaking component that includes a housing containing an air mover for drawing ambient air directly into the housing. The air mover is capable of operating at a high flow rate and a lo... | 11/13/2001 |
| 6299433 | Burner control A method and apparatus for controlling the operation of a burner apparatus are provided via the flame intensity of combustion reaction mixtures of oxidant and fuel gas.... | 10/09/2001 |
| 6272762 | Ovality measurement method and apparatus An ovality measurement tool for measurement of ovality of a circumferentially deformable cylindrical element having a cylindrical element support, a sensing element for traversing the circumference of the cylindrical element, which sensing element is mova... | 08/14/2001 |
| 6269830 | Extended area thermal activation device A method for protection of a object subject to damage under thermally hazardous conditions having a triggerable safety appliance in which an elongated shaped memory alloy material having a first end and a second end is extended over an entire area to be p... | 08/07/2001 |
| 6258336 | Method and apparatus for NOx reduction in flue gases In a furnace having a primary combustion zone for combustion of a fuel and oxidant, an in-furnace method for reducing nitrogen oxides in combustion products generated in the primary combustion zone in which at least one fluid fuel selected from the group ... | 07/10/2001 |
| 6249259 | Downhole magnetic dipole antenna A downhole magnetic hollow core dipole antenna has a high permeability material magnetic core composed of laminated sections placed around a section of drill pipe and running substantially along the length of the pipe. The magnetic core is then surrounded... | 06/19/2001 |
| 6235090 | Kitchen hood filtration apparatus A kitchen hood filtration system having improved odor removal properties includes an electrostatic precipitator having negative corona which generates ozone. The ozone interacts with odor-producing moieties to help eliminate the odors. The filtration syst... | 05/22/2001 |
| 6216685 | Common venting of water heater and induced draft furnace A common, side-wall, Category III or Category IV-vented gaseous fuel-fired furnace and gaseous fuel-fired water heater system having a gaseous fuel-fired furnace having a furnace combustion products exhaust, a gaseous fuel-fired water heater having a wate... | 04/17/2001 |
| 6210955 | Foam transport process for in-situ remediation of contaminated soils A process for in-situ remediation of contaminated soil in which at least one treating agent is introduced into the contaminated soil and transported to an underground in-situ treatment zone of the contaminated soil by a foam-based fluid.... | 04/03/2001 |
| 6209387 | System and method for determining thermodynamic properties Disclosed is a system and method for determining the thermodynamic properties and percentage of each component of a multi-component gas medium by using speed of sound in conjunction with other data. The present system comprises a computer system with mean... | 04/03/2001 |
| 6198277 | Sensor module for use in system for inspecting in-service gas distribution mains A system for inspecting in-service gas distribution mains is disclosed. Coiled tubing technology and magnetic flux leakage (MFL) technology are integrated to produce a new inspection system for low pressure, in-service distribution pipelines. The coiled t... | 03/06/2001 |
| 6187220 | Ether heat and mass transfer additives for aqueous absorption fluids An aqueous absorption fluid composition, process and apparatus wherein the absorption fluid comprises certain ethers providing improved water vapor absorption and thermal transfer in thermal exchange loops used in absorption refrigeration, chilling, heat ... | 02/13/2001 |
| 6178964 | Fluid heating apparatus A natural draft combustion system having a housing enclosing at least a portion of a material heating container and at least one combustion space in heat exchange relation with the material heating container and extending from a heat inlet side of the hou... | 01/30/2001 |
| 6176101 | Flat-plate absorbers and evaporators for absorption coolers An absorber and evaporator combination for use with an absorption heat pump (including chillers and air conditioners) as well as with other apparatus in which a vapor is absorbed by a liquid absorbent or a liquid or gas is cooled by evaporative cooling is... | 01/23/2001 |
| 6162049 | Premixed ionization modulated extendable burner A ported, premixed extendable burner provides increased turndown capability relative to conventional burners. The burner has an adjustable flameholder sleeve which can be extended and retracted relative to a flameholder, to increase and decrease the avail... | 12/19/2000 |
| 6147929 | Method for predicting continuous and discontinuous waveguide targets using interwell seismic signature characteristics A method for planning continuity logging surveys and for detecting the presence of a continuous or discontinuous low-velocity inclusion in a subterranean geological formation. To detect the presence of a continuous or discontinuous low-velocity inclusion,... | 11/14/2000 |
| 6139311 | Pilot burner apparatus and method for operating An apparatus and method for operating a pilot burner apparatus and a main burner apparatus of a gas-fired appliance. The pilot burner apparatus draws combustion air from a first environment. The main combustion apparatus draws air from a second environmen... | 10/31/2000 |
| 6138554 | Multi-layer griddle An apparatus for cooking food having a multi-layer cooking plate including a stainless steel sheet layer having a top surface and a bottom surface and a high thermal conductivity material layer metallurgically bonded to the bottom surface of the stainless... | 10/31/2000 |
| 6135234 | Dual mode multiple-element resonant cavity piezoceramic borehole energy source A dual mode multiple-element resonant cavity piezoceramic borehole energy source is disclosed. Thus, a source for generating detectable seismic waves in a wellbore is provided which is capable of transmitting useful signals over long distances between the... | 10/24/2000 |
| 6136282 | Method for removal of hydrogen sulfide from gaseous streams A method for removal of H2 S from an H2 S-containing natural gas stream in which a high surface area contactor is inserted into the natural gas stream and at least one H2 S scavenging agent is injected into the natural gas... | 10/24/2000 |
| 6133699 | Method and apparatus for operating a plurality of motors with a single controller A system for operating a plurality of motors with a single controller is disclosed. This system includes a first motor, a second motor that is matched to the first motor but has a lower power rating than the first motor and a controller electrically drivi... | 10/17/2000 |
| 6129542 | Dual mode pilot burner A dual mode pilot burner having a control flame mode of operation and a pilot flame mode of operation, which dual mode pilot burner is suitable for controlling the fuel/air ratio of a main burner when operating in the control flame mode of operation. The ... | 10/10/2000 |
| 6125079 | System and method for providing dual distance transducers to image behind an acoustically reflective layer A transducer configuration for use in acoustically imaging a target region behind an acoustically reflective layer includes a sonde having a geometrical center and constructed and arranged to support a plurality of transducers. The system includes a first... | 09/26/2000 |
| 6119782 | Method and apparatus for anchoring a tool within a cased borehole A method and apparatus for anchoring a tool within a cased borehole wherein at least one piston connected with respect to the tool includes an associated anchor shoe. The anchor shoe has a penetration means, such as a plurality of wheels having a sharp ou... | 09/19/2000 |
| 6112741 | Mid-efficiency furnace with multiple venting option A multi-category gaseous fuel-fired heating apparatus having a combustion chamber, a mixing chamber in fluid communication with the combustion chamber, and an induced draft blower in fluid communication with the mixing chamber whereby combustion air is dr... | 09/05/2000 |
| 6109255 | Apparatus and method for modulating the firing rate of furnace burners A modulating furnace includes a first air flow path which directs supply air to one or more combustion burners and through a heat exchanger, and a second air flow path which directs supply air around the one or more burners and heat exchanger. When the fi... | 08/29/2000 |
| 6112137 | Adaptive system for predictive control of district pressure regulators A method and apparatus for controlling a fluid distribution regulator disposed in a fluid distribution system in which an intelligent controller is operatively connected to at least one fluid district regulator for controlling the district regulator. At l... | 08/29/2000 |
| 6106967 | Planar solid oxide fuel cell stack with metallic foil interconnect A solid oxide fuel cell stack having a plurality of integral component fuel cell units, each integral component fuel cell unit having a porous anode layer, a porous cathode layer, and a dense electrolyte layer disposed between the porous anode layer and t... | 08/22/2000 |
| 6108606 | Waveguide disturbance detection method A method for detection of a disturbance in a waveguide comprising transmitting a wavefield having symmetric and antisymmetric components from a horizontally and/or vertically polarized source and/or pressure source disposed symmetrically with respect to t... | 08/22/2000 |
| 6099985 | SOFC anode for enhanced performance stability and method for manufacturing same An SOFC anode is provided, which is fabricated from ceria which has been mixed with a nickel oxide-magnesium oxide material to stabilize the nickel against coarsening during high temperature SOFC operation. With a starting material of NiO--MgO solid solut... | 08/08/2000 |
| 6083300 | Dual mode air treatment apparatus and method An apparatus and system, as well as corresponding methods of operation and treatment of air, are provided which make use of a rotatable desiccant bed such as to permit the effective and selective alternative reduction of humidity of incoming air or recove... | 07/04/2000 |
| 6074200 | Burner apparatus having an air dam and mixer tube A pilot burner apparatus for use with gas-fired appliances, such as gas-fired water heaters, is provided with a structure configured for the early detection, and response to, the presence of flammable vapor in the atmosphere ambient to the appliance. Comb... | 06/13/2000 |
| 6071115 | Apparatus for low NOx, rapid mix combustion A process and apparatus for combusting fuel which results in reduction of nitrogen oxides and carbon monoxides emissions. Fuel and primary air are preferably premixed and introduced into a combustion chamber. Secondary air is introduced through a pluralit... | 06/06/2000 |
| 6070467 | Electromagnetic acoustic transducer (EMAT) system and method for eliminating noise produced by static discharge The present invention allows for the fabrication of an EMAT system that eliminates static charge impulse noise. The EMAT system includes an EMAT, wear layer, and magnet. If the wear layer is made slightly conductive, the static charges slowly bleed off ra... | 06/06/2000 |
| 6065328 | Apparatus and method for determining thermophysical properties using an isobaric approach The instant invention relates to a method and apparatus to determine the thermodynamic properties of a gas medium without making a determination of gas composition. In the instant invention, the speed of sound of a gas medium in a vessel is determined at ... | 05/23/2000 |
| 6060719 | Fail safe gas furnace optical flame sensor using a transconductance amplifier and low photodiode current A fail safe gas furnace optical flame sensor uses a transconductance amplifier with low photodiode current to sense the presence or absence of a gas flame within the burner of a gas furnace. The photodiode signal appears as the only negative voltage signa... | 05/09/2000 |
