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| Number | Title | Issue Date |
| 7435081 | Method and system for pilot light safety A gas valve includes a gas inlet in fluid communication with a first chamber, a second chamber in selective fluid communication with the first chamber, a gas outlet in selective fluid communication with the second chamber, a pilot light outlet in fluid communication... | 10/14/2008 |
| 7319577 | Safety shut off for water heaters A water heater includes a gas valve and a solenoid to operate the gas valve. A thermocouple of the water heater is heated by a pilot light to provide a current source to maintain the gas valve in an open position. A sensor activated switch switches current from a se... | 01/15/2008 |
| 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 |
| 7111642 | Valve having fast and slow acting closure elements A first valve portion and a second valve portion are arranged in series in a flow passage within a valve casing to open and close the flow passage. The first valve portion includes a first valve seat, a first valve element supported to a first valve shaft and adapte... | 09/26/2006 |
| 6973819 | Differential compensated vapor sensor Vapor sensing systems and methods are disclosed. An appliance such as a gas water heater, clothes dryer, and the like can be associated with a controller for controlling the appliance. A vapor sensor is also associated with the appliance, such that the vapor sensor ... | 12/13/2005 |
| 6848474 | Control device for a flow of fluid The invention relates to a device comprising at least one safety shut-off control valve. A safety valve is optionally connected to said safety shut-off control valve, connected in series in the fluid flow path. In the safety shut-off control valve, a sealing valve i... | 02/01/2005 |
| 6745994 | Device for repositioning a rotating element A device for restoring a rotary member into a defined normal position, with a spatially stationary fixed catch, which predetermines the normal position, and a driver catch, which is coupled to the rotary member and can be moved past the fixed catch, each of which ha... | 06/08/2004 |
| 5844492 | Water leakage detection and gas shut-off device A gas leak and cut-off device is provided including a gas-powered hot water heater having a cylindrical configuration with a circular top face, a circular bottom face, and a cylindrical periphery formed therebetween. The bottom face has a plurality of sta... | 12/01/1998 |
| 5785511 | Control device for gas supply to main burner and pilot burner of a gas equipment In this combustion gas control device, an electromechanical control is provided for automatically controlling the supply of the gas to the pilot burner when it is being ignited and subsequently to the main burner. The device has a main chamber, a pilot ch... | 07/28/1998 |
| 5735503 | Servo pressure regulator for a gas valve An electromechanical actuator-operated pressure regulator for supplying control pressure for a diaphragm-operated gas control valve, the actuator also operating an on-off control valve for the gas valve. A passageway including a pressure adjusting device ... | 04/07/1998 |
| 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 |
| 4995415 | Partially flooded gas appliance safety shut-off method and apparatus Gas burner safety device for use with gas fired heating systems and water heaters to shut-off main gas valve controlled gas flow to the burner's main gas jet in the event that the main jet becomes partially submerged to at least a critical level in surrou... | 02/26/1991 |
| 4832070 | Flame failure devices The invention provides a flame failure device in which the reservoir exposed to the flame is charged with air and is communicated via a capillary tube to displace a membrane and hold the main valve in an open position, and the valve is closed by a spring ... | 05/23/1989 |
| 4806095 | Fuel valve control system A fail safe gas shut off system is provided for a gas appliance. Two normally closed valve stages are provided in series, with each stage operated by a bidirectional solenoid armature. When the armature moves in one direction, the first stage of the valve... | 02/21/1989 |
| 4783600 | Automatic controller of the master gas switch An automatic controller for a master gas switch includes a timer for keeping the switch opened for a selectable time. The controller includes an electrical motor for rapidly closing the switch. The motor is responsive to two conditions: When the timer rea... | 11/08/1988 |
| 4778378 | Self-powered intermittent ignition and control system for gas combustion appliances A self-powered control system for a gas-fired appliance having a pilot burner and a main burner includes an emissive surface in the flame of the pilot burner and a photovoltaic device for irradiation from the emissive surface for providing electrical powe... | 10/18/1988 |
| 4518003 | Pressure responsive cap for gas appliances The invention relates to a pressure responsive assembly for controlling the supply of gas to a gas appliance. A pressure responsive device includes a sealed air bulb positioned to monitor the pilot flame of the appliance. A capillary tube connected at one... | 05/21/1985 |
| 4491142 | Automatic stopping device of combustion fuel supply An automatic fuel supply stopping device incorporated in fuel combustion equipment including a shut-off valve and a combustor. The automatic fuel supply stopping device comprises a fluid intercepting mechanism interposed in a channel through which the fue... | 01/01/1985 |
| 4437830 | Burner and pilot valve safety control system The movable elements of two normally closed valves are actuated by a thermal element responsive to ignition at a pilot burner supplied fuel through one of the valves. The two valve elements form a mechanical train from the thermal element which simultaneo... | 03/20/1984 |
| 4429705 | Manually actuated fuel valve control A hydraulic actuator and valve are used for the control of fuel to a burner. The actuator is energized to open the valve through a manual start switch and a manual reset switch to prevent the manual start switch from being held in either accidentally or i... | 02/07/1984 |
| 4303384 | Flame failure device A flame failure device has a hollow, tubular, heat-resistant, temperature sensitive member to be directly heated by a flame and so arranged that the member will expand or contract along a generally rectilinear axis as it is heated or cooled. The temperatu... | 12/01/1981 |
| 4168719 | Gas control unit for a burner A gas control device for controlling the gas supply to the burner of a domestic hot water boiler has two main valves arranged in series in the gas flow path so as when closed to define a chamber between them. A second chamber is communicable with this cha... | 09/25/1979 |
| 4092994 | Valves A floating O-ring is located between a valve plate and a valve seat to seal the valve, and is prevented from slipping out of alignment with the seat by cylindrical or conical guide structure.... | 06/06/1978 |
| 4080154 | Gas burner control system with cycling pilot In a gas burner control system a normally closed, electromagnetically opened first valve has primary control of gas flow to pilot and main burners and the application of gas pressure to cause a normally closed, diaphragm-operated second valve controlling ... | 03/21/1978 |
| 4005726 | Thermomagnetic valve A hot fluid is directed through a valved conduit inlet. Downstream of the inlet, the conduit divides into a pair of outlets through which the hot fluid flows. The flow through the outlets is controlled by a pair of vertically oriented valves linked togeth... | 02/01/1977 |
| 3975135 | Burner control system with cycling pilot burner A gas burner control system in which closure of a space thermostat causes energization of an electromagnetic actuator to supply fuel to a pilot burner and effect the operation of an igniter to ignite it; a thermostatic actuator heated by the pilot flame t... | 08/17/1976 |
| 3938936 | Fluid control system A fluid control system for use with combustion apparatus including a valve assembly having first and second serially connected valves positioned between the inlet and outlet of the valve assembly. First and second actuators respectively connected to opera... | 02/17/1976 |
