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| Number | Title | Issue Date |
| 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 |
| 7265677 | External device indicating that a tank is filled up System for indicating when a tank is full. The system includes a signal and control box. A container is connected to the tank. The container has a base, a float, an upper portion, and a lower portion. An orifice is arranged at the upper portion of the container. The... | 09/04/2007 |
| 7167813 | Water heater performance monitoring system A water heater performance monitoring device for monitoring whether a water heater is functioning optimally or whether it requires service. The device uses maximum heating rates taken from a plurality of measured heating rates to determine if the performance of the ... | 01/23/2007 |
| 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 |
| 6675826 | Automatic flood prevention system A flood prevention system includes a double-latching solenoid valve that shuts off a water supply line in response to a moisture sensor detecting a leak in a plumbing system. The double-latching feature provides the solenoid's plunger with two positions o... | 01/13/2004 |
| 6561138 | Water heater with a flame arrester A water heater is arranged with the hot water storage chamber R1 at the top and the combustion chamber R2 at the bottom within the body 11 which is a container. The combustion chamber R2 is equipped with the air supply inlet 13a, and the flame arrester 27... | 05/13/2003 |
| 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 |
| 6325535 | In-situ radiant heat flux probe cooled by suction of ambient air A probe for determining the heat flux in a direct-fired heater. The direct-fired heater is under a vacuum pressure. This vacuum pressure induces a small quantity of ambient air through a ceramic insulating tube and eventually into the heater. The induced ... | 12/04/2001 |
| 6186162 | Leak detection and shut-off apparatus A water shut-off system incorporates a water shut-off valve utilizing a pair of adjacently disposed electrodes, a transmitter and a receiving means. The water shut-off valve is in the form of a ball valve. A timing logic causes current to flow to a valve ... | 02/13/2001 |
| 6135133 | Water-heater containment and warning device A household appliance water leak detection and management containment wall made from one or more oblong pieces of water-resistant, shape-retaining, flexible sheet material such as aluminum. The ends of the pieces may be joined to circumscribe a zone of co... | 10/24/2000 |
| 5992443 | Valve system A valve system for use in conjunction with a hot water heater where the water line to the hot water heater passes through the valve system which, when a leak is detected by an electrical sensor, causes a motor to drive a gear which moves a gear rack later... | 11/30/1999 |
| 5979372 | Method of sensing malfunctions of a water supply system for a boiler and apparatus thereof A method, which senses malfunctions of a water supply system employed in a boiler system, comprises the steps of a) sensing a water level in a water tank; b) controlling a supplying of supplementary water from a water source to the water tank in response ... | 11/09/1999 |
| 5881762 | Base-surround retrofit enclosure assemblies for containing leakage A walled enclosure assembly adapted to be installed around the base of a water-containing appliance and bonded to the support floor to contain leakage therefrom without disturbing the appliance. The walled assembly comprises a plurality of wall segments, ... | 03/16/1999 |
| 5857482 | System for control of fluid vessel overflows An overflow control system includes a vessel having a liquid input and output, the vessel having a top and bottom defined by the gravity vector. The system further includes a housing peripherally surrounding the vessel about all surfaces, other than the b... | 01/12/1999 |
| 5632302 | Overflow protection shut-off apparatus for use with a water heater An overflow protection shut-off device for use with a water heater for shutting off a supply of water to the water heater when a leaking or an overflow condition occurs, the device including a valve mechanism coupleable to an input water line of a water h... | 05/27/1997 |
| 5280802 | Gas appliance detection apparatus A first and second sensor and alarm member is mounted relative to a gas appliance, and more particularly to the diverter housing and adjacent a lower portion of the gas appliance for detection of spillage in the form of flue restriction relative to the fi... | 01/25/1994 |
| 5188143 | Water leakage detection device A water leakage detector is disclosed herein sensitive to the presence of moisture, having an elongated sensor strip comprising a pair of conductors separated by insulation. Each conductor includes an electrode coupling with a wire lead extending via a ca... | 02/23/1993 |
| 5101774 | Acoustic leak detection system Paper pulp mill chemical recovery boiler steam piping is monitored for leaks by an acoustic leak detection system responsive to atmospherically carried sound transmissions. Energy level amplitudes of respective analog electrical signals generated sequence... | 04/07/1992 |
| 4974550 | Accumulator with sensor through rollers An accumulator with sensor through rollers provided with a rod projecting into a bladder on a cover of a vessel body, a bearing of a float slidable axially on the rod, and also with rollers at a contact portion of the float with the bladder, the bladder s... | 12/04/1990 |
| 4960079 | Acoustic leak detection system Paper pulp mill chemical recovery boiler steam piping is monitored for leaks by an acoustic leak detection system responsive to atmospherically carried sound transmissions. Energy level amplitudes of respective analog electrical signals generated by a mul... | 10/02/1990 |
| 4936376 | Synthetic gas cooler with thermal protection In a heat exchange vessel which conducts a hot, pressurized synthetic gaseous stream carrying particulate matter through a central heat exchange chamber, a safety system for monitoring pressures within the vessel. Said heat exchange vessel includes a shel... | 06/26/1990 |
| 4905632 | Safeguard arrangement for plant A safeguard arrangement for a plant, which comprises a plant auxiliary provided with a lid and so designed that the lid is opened for maintenance of the inside thereof, switching means installed on a piping connected to said plant auxiliary, and driving m... | 03/06/1990 |
| 4901678 | Heating boiler and method for operating same A fan forces air through an air inlet channel to a mixing chamber where it is mixed with fuel, and the mixture is then fed to a burner. The combustion products of the burner provide heat to a heat exchanger which is connected to a discharge channel. The c... | 02/20/1990 |
| 4876987 | Synthetic gas cooler with thermal protection In a heat exchange vessel which conducts a hot, pressurized synthetic gaseous stream carrying particulate matter through a central heat exchange chamber, a safety system for monitoring pressures within the vessel. Said heat exchange vessel includes a shel... | 10/31/1989 |
| 4805662 | Hot water heater failure protection device with solenoid A ground fault interrupter (GFI) circuit is wired to a main circuit breaker panel. A first output of the ground fault interrupter circuit provides electrical current to a solenoid valve that controls the supply of cold water to a conventional hot water he... | 02/21/1989 |
| 4615302 | Convection section ash monitoring Fouling of the convection section of a steam generator by ash or other solid deposit from the product gas stream is monitored using radiation pyrometers which determine the temperature drop across a bank of heat exchanger tubes and calculation therefrom o... | 10/07/1986 |
| 4603660 | Convection section ash monitoring Fouling of the convection section of a steam generator by ash or other solid deposit from the product gas stream is monitored using radiation pyrometers which determine the temperature drop across a bank of heat exchanger tubes and calculation therefrom o... | 08/05/1986 |
| 4598668 | Apparatus for efficiently controlling the operation of parallel boiler units There is disclosed a control apparatus for operating any one of a plurality of parallel connected boilers as a lead boiler, with the others operating as lag boilers. The control apparatus enables a lag boiler to assist the lead boiler during a prolonged o... | 07/08/1986 |
| 4572113 | Water leak control circuit A water leak control circuit in combination with a water heater having an inlet and a drain. The water leak control circuit simultaneously detects leaks, actuates an alarm, shuts off a water supply to the water heater, drains the heater, while releaseably... | 02/25/1986 |
| 4569312 | Hot water tank warning system An electrical overflow warning system for a hot water tank. There is provided a cavity within an overflow line leading from the tank. Within the cavity is located an electrical probe. When an overflow occurs the probe comes in contact with water causing a... | 02/11/1986 |
| 4556019 | Convection section ash monitoring Fouling of the convection section of a steam generator by ash or other solid deposit from the product gas stream is monitored using radiation pyrometers which determine the temperature drop across a bank of heat exchanger tubes and calculation therefrom o... | 12/03/1985 |
| 4552098 | Convection section ash monitoring Fouling of the convection section of a steam generator by ash or other solid deposit from the product gas stream is monitored using radiation pyrometers which determine the temperature drop across a bank of heat exchanger tubes and calculation therefrom o... | 11/12/1985 |
| 4531479 | Monitor system for vertical boilers A monitor for the boiler water level in a boiler tube extends from the upper portion of the steam drum to the lowest water drum, header, or the like, and sensors are placed along its length which are responsive to the presence or absence of liquid water a... | 07/30/1985 |
| 4514096 | Furnace wall ash deposit fluent phase change monitoring system The build up of ash in a pulverized coal-fired boiler is achieved by comparing the heat flux simultaneously detected by a first flux detector which is maintained free of deposits and a second flux detector on which deposits are permitted to form. The net ... | 04/30/1985 |
| 4462339 | Gas cooler for production of saturated or superheated steam, or both A gas cooler and process are provided for extracting heat from the hot raw gas stream from the partial oxidation of a hydrocarbonaceous or carbonaceous fuel, and the simultaneous production of a separate stream of saturated or superheated steam, or separa... | 07/31/1984 |
| 4433646 | Boiler water trip system A boiler water trip system comprises a flow transmitter for sensing a flow of water into a boiler, a pressure transmitter for sensing a pressure of steam entering a first stage of a turbine powered by the boiler, a unit power transmitter for sensing the p... | 02/28/1984 |
| 4408568 | Furnace wall ash monitoring system The build up of ash in a pulverized coal-fired boiler is achieved by comparing the heat flux simultaneously detected by a first flux detector which is maintained free of deposits and a second flux detector on which deposits are permitted to form. The net ... | 10/11/1983 |
| 4263587 | Liquid level control system A system for monitoring the liquid level in containers such as boilers and tanks. An electrode inserted into the container completes a path through the liquid when the liquid is at or above a predetermined level. When the liquid falls below the level, the... | 04/21/1981 |
| 4256258 | Temperature monitor and alarm system The disclosed temperature monitoring and alarm circuit includes a temperature responsive switch which opens when water temperature exceeds a predetermined point. When the switch opens, a relay is de-energized, thereby activating a latch which activates a ... | 03/17/1981 |
| 4196341 | System for monitoring the operation of an electric boiler An electrode steam boiler includes a water-receiving shell and water-heating electrodes supported in the shell so as to be partially immersed in the water to be heated. The boiler also has first and second water-handling means arranged, respectively, for ... | 04/01/1980 |
