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| Number | Title | Issue Date |
| 7628122 | Method for maximum efficiency of non-condensing boiler Provided is a method for operating a non-condensing boiler at maximum non-condensation efficiency, and more particularly a method for operating a non-condensing boiler, capable of supplying an appropriate amount of excess air for combustion of a burner, avoiding dam... | 12/08/2009 |
| 7624708 | Process for operating a continuous steam generator The invention relates to a process for operating a continuous steam generator. The aim of the invention is to provide, with little technical complexity and for any operating state, a synchronous variation of the feed-water mass flow passing through the evaporator he... | 12/01/2009 |
| 7401577 | Real time optimization and control of oxygen enhanced boilers An oxygen enriched boiler having a burner subassembly and a steam subassembly is disclosed. The burner subassembly has a fuel inlet, an oxidant inlet, a combustion chamber, a flue gas composition detector and a flue gas outlet. The fuel inlet provides fuel to the co... | 07/22/2008 |
| 7353821 | Steam oven system having steam generator with controlled fill process A steam oven includes a heating chamber or boiler in which steam is generated. Water fill and refill operations of the heating chamber are controlled in attempt to account for water expansion and/or to enable substantially regular production of steam. ... | 04/08/2008 |
| 7325399 | Coolant penetrating cold-end pressure vessel An improvement is provided to a pressurized close-cycle machine that has a cold-end pressure vessel and is of the type having a piston undergoing reciprocating linear motion within a cylinder containing a working fluid heated by conduction through a heater head by h... | 02/05/2008 |
| 7290502 | System and methods for controlling a water heater A control for a water heater is provided that comprises a pressure switch for sensing a predetermined level of airflow sufficient for maintaining proper burner operation, and a temperature sensing means for sensing the temperature of the water in the tank. The contr... | 11/06/2007 |
| 7284970 | Fluid apparatus having a pump and an accumulator A pump liquid chamber (9) is formed inside a pump bellows (7). A suction port (18) and a discharge port (19) are formed in a wall face (4a) facing the liquid chamber (9). The suction port (18) communicates with... | 10/23/2007 |
| 7260934 | External combustion engine An organic Rankine engine used to power a vehicle is provided with a quick-start system of pumps, electric heaters or pistons to generate a pressure differential across the motor, prior to the engine reaching operating conditions. ... | 08/28/2007 |
| 7252502 | Method and system for combined standing pilot safety and temperature setting The method and apparatus provides a controller (which might comprise a microprocessor) that can control gas flow to a pilot burner in fluid communication with a manual pilot valve and an automatic pilot valve. The exemplary embodiments can comprise a selectable inpu... | 08/07/2007 |
| 7249573 | Pressurized steam boilers and their control A method of controlling the operation of a pressurised steam boiler (50) heated by a burner (20), which includes the steps of a) monitoring the level of water in the boiler (50), b) monitoring the pressure of steam in the boiler (50), c) ... | 07/31/2007 |
| 7249420 | Slider device and measuring instrument A slider device includes a base (200), a running head (300) slidably provided on the base (200), a main guide mechanism (410) for guiding in a first direction in which the running head (300) runs, and sub-guide mechanism (450 | 07/31/2007 |
| 7246005 | Method and apparatus for controlling a component by feed-forward closed-loop controller state modification An apparatus comprises a feed-forward arrangement and a closed-loop controller. The feed-forward arrangement is configured to determine a change of a system, the system change being independent of an output of a component of the system. The feed-forward arrangement ... | 07/17/2007 |
| 7135969 | Theft deterrent for home appliances A security system for protecting home appliances includes an alarm system with a wireless link to the protected appliances. The appliances include circuitry that disables the appliance in response to a signal from the alarm system. The appliance or alarm system can ... | 11/14/2006 |
| 7128466 | Dual thermometer system The invention provides a dual thermometer system for the measurement and display of temperature data taken at two separate locations within an oven. In one aspect, the invention provides an elongated probe connected with a flexible electronic cable. The probe houses... | 10/31/2006 |
| 7093611 | Water feeder controller for boiler A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff senso... | 08/22/2006 |
| 7053341 | Method and apparatus for drum level control for drum-type boilers A method for controlling the level of a drum in a drum-type boiler includes adjusting a gain of a drum level PID (such as a Proportional Integral Derivative control) in accordance with a signal representative of a set of tuning constants, a signal representative of ... | 05/30/2006 |
| 7032542 | Apparatus and methods for controlling a water heater A gas-powered water heater includes means for stepping down a line voltage from a receptacle remote from the tank, means for using the stepped down voltage to provide a low voltage, and means for using the low voltage to sense conditions pertaining to the heater and... | 04/25/2006 |
| 7021925 | Safety module for fuel-burning appliance, and appliance using such a module The invention provides a safety module for connection to a fuel-burning appliance. The safety module connects to the existing circuitry of the appliance and triggers an alarm response when certain predetermined conditions are met. The safety module includes a CO sen... | 04/04/2006 |
| 7007857 | Compact vehicle heating apparatus and method A compact vehicle heating system and method is provided which includes mechanisms to selectively shut down heating systems. For example, when domestic hot water is required, space heating and engine preheating systems can be shut down in order to provide priority he... | 03/07/2006 |
| 7007636 | Fuel system for premix burner of a direct-fired steam generator A direct-fired, propane powered steam generator is provided with a carburetor, which receives vaporized propane from a converter arrangement which converts liquid propane to vapor, receives pressurized air and feeds a mixture of vaporized propane and air into the co... | 03/07/2006 |
| 7000847 | Quick recovery water heater A small water heater with a 29 cm outer diameter and a total height of 60 cm produces five liters of hot water per minute, with a difference of 25° C. between the water inlet and outlet, and an 85% thermal efficiency; this water heater has a heat recuperator 1 | 02/21/2006 |
| 6996479 | Method and apparatus for measuring and controlling the water content of a water-containing liquid mixture An apparatus for measuring the water content of a water-containing liquid mixture contained in a tight chemistry tank includes a heating device for controlling the temperature of the liquid mixture to a temperature near the boiling point of the liquid mixture, a coo... | 02/07/2006 |
| 6978741 | Apparatus and method for measuring total dissolved solids in a steam boiler A method and apparatus for controlling the operation of a pressurized steam boiler heated by a burner. The method includes the steps of monitoring the level of total dissolved solids in water contained in the boiler, monitoring the level of water in the boiler, moni... | 12/27/2005 |
| 6978740 | Crop re-hydration system utilizing a direct-fired steam generator having continuous water circulation A direct-fired steam generator system is used in conjunction with a baler for providing steam for re-hydrating the crop being baled. Cooling water is pumped through water jackets defined by double walls surrounding the combustion chamber and adjacent components, wit... | 12/27/2005 |
| 6959706 | Safety circuit for chimney fans A single-phase asynchronous motor with an auxiliary winding in which non-rotation is detected by the absence of an induced voltage across the auxiliary winding when it is briefly disconnected from its power source. Before the detection, the motor is briefly provided... | 11/01/2005 |
| 6959876 | Method and apparatus for safety switch A circuit in accordance with the invention includes a safety switch device coupled with, and between, a thermally activated voltage source and a primary switch. The circuit also includes a safety switch control circuit coupled with the safety switch device and a con... | 11/01/2005 |
| 6955301 | Water heater and control An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors d... | 10/18/2005 |
| 6938584 | Feedwater control system considering pressure drop of feedwater control valve in nuclear power plant and control method therefor A feedwater control system considering a pressure drop of feedwater control valve in a nuclear power plant and a control method therefor are provided. In the feedwater control system, a first detection unit includes: a flow error signal generator for generating a fl... | 09/06/2005 |
| 6926028 | Water feeder controller for boiler A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff senso... | 08/09/2005 |
| 6926073 | Spiral heat exchange device Disclosed is a spiral heat exchanging device having an improved cooling efficiency in which a plurality of spiral pipes connected to an inlet pipe for introducing a coolant are formed to be spirally wound with a gradually increased diameter toward a blast fan and th... | 08/09/2005 |
| 6918356 | Method and apparatus for optimizing a steam boiler system A method for controlling a steam boiler or oil heater for maximum fuel efficiency by systematically finding the most fuel-efficient combination of input control values. A characteristic multi-dimensional look-up table is created by temporarily operating the process ... | 07/19/2005 |
| 6916173 | Method and apparatus for operating gaseous fuel fired heater An apparatus for combusting a fuel and air mixture within a combustion chamber, particularly a combustion chamber of a gaseous fuel fired water heater. A pressure relief void is intentionally formed so that a combustion chamber forms communication with a surrounding... | 07/12/2005 |
| 6904874 | Forward calculation energy augmentation method Devices and methods for controlling a boiler system. One illustrative method includes controlling the bypass temperature by increasing the firing rate of the boiler. Further methods include bypass temperature control methods wherein both regular and fast control met... | 06/14/2005 |
| 6840198 | Air-proportionality type boiler An air-proportionality type boiler is provided. Since the air-proportionality type boiler directly controls a current proportionality gas valve according to an amount of air by using a low-price AC air blower, a low-price current proportionality gas valve and a low-... | 01/11/2005 |
| 6694927 | Cold water draw bypass valve and variable firing boiler control A first sensor provides a demand for heat signal to a condensing boiler or water heater for control of the variable firing rate. A second sensor controls a bypass valve to allow a portion of water leaving the primary heat exchanger to reenter the primary ... | 02/24/2004 |
| 6688329 | Water feeder controller for boiler A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water c... | 02/10/2004 |
| 6598564 | Natural gas supply apparatus Apparatus for supplying natural gas fuel to heat the boilers of an ocean-going tanker for the transport of liquefied natural gas (LNG) comprises a compressor having an inlet communicating with the ullage space of at least one LNG storage tank and an outle... | 07/29/2003 |
| 6553946 | Multi-function water heater control device A single control device is operational to control the flow of gas to a water heater as well as to protect against excessive temperature and pressure. The control device requires only a single fitting to be attached to the water heater tank to expedite the... | 04/29/2003 |
| 6552647 | Building environment monitor and control system A monitor and control system that responds to alarm signals representing different hazardous conditions in an environment having a number of utility service supply lines, such as a home residence. One or more sensors coupled to the processor are each asso... | 04/22/2003 |
| 6520122 | Pressurized steam boilers and their control The flow rate of water into a pressurised steam boiler heated by a burner is controlled by monitoring the level of water in the boiler, monitoring the pressure of steam in the boiler and monitoring the firing rate of the boiler. The level of water in the ... | 02/18/2003 |
