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Class 137/78.4 - Burner gas cutoff


Subclass of Class 137 - Fluid handling
Definition: Apparatus in which flow of flammable gas to a burner is
No. of patents: 23
Last issue date: 04/03/2007


NumberTitleIssue Date
7112059Apparatus and method for shutting down fuel fired appliance
An apparatus is provided for controlling the operation of a gas fired appliance having a gas valve circuit for enabling the flow of gas to the burner. The apparatus comprises a sensor capable of detecting the presence of flammable vapor, a switching means in series ...
09/26/2006
7045982Driving circuit for brushless motor
A driving circuit for a brushless motor includes a current sensor for detecting alternating phase-current flowing in one of the phase coils, a switching driver for supplying each phase-coil with prescribed alternating phase-current, a reference value setting circuit...
05/16/2006
6543743Gas control valve
A gas control valve includes a first element, a second element, a mediate element, a sleeve, a rod and a control element. The first element defines a first path. The second element defines a second path and a hole in communication with the second path. Th...
04/08/2003
6269829Integrated gas meter
An adapter to convert a traditional gas meter into a computerized gas meter is disclosed. The adapter of this invention comprises a microcomputer gas flow signal converting module, a gas flow monitoring module, a gas pressure monitoring module, an earthqu...
08/07/2001
6199573Gas flow arrestor
A device and method for shutting off the flow of gas to a structure, such as a residence, when a fire is detected in the structure. The device has a fire detector for providing a status signal to indicate the presence of fire in a structure, an actuator i...
03/13/2001
6170509Safety valve system
A safety device for shutting off a gas valve at the detection of a gas leak has an add-on adaptor device having a first knob mounted over an existing gas knob and affixed thereto; a spindle coupled to the first knob, capable of rotating the fist knob, and...
01/09/2001
6000390Control mechanism with gas safety valve for a gas range
The gas safety valve includes a valve that is solenoid actuated in a fashion to interrupt the flow of gas from the gas line to the stove. A remotely located switch including a key locking mechanism can be mounted at any convenient but safe location. A key...
12/14/1999
5908980Integrated safety control system for user's gas facility and gas leakage recognizing method
An integrated safety control system comprises a controller unit, driver unit, first transmitter/receiver unit, and a second transmitter/receiver unit. The controller unit outputs control signals respectively based on input signals received thereto to cont...
06/01/1999
5730170Emergency gas or fuel shut-off device
An emergency fuel shutoff device for interrupting the flow of gas or other fuel to a burner in the event of a malfunction or fire. The device uses a normally closed spring loaded fuel valve which is held open by tension along a cable. The cable has severa...
03/24/1998
5722448Gas line automatic cut off valve
A gas line automatic cut off valve including a gas valve housing adapted to be conveniently coupled between a standard gas line outlet and a standard gas powered appliance; a gas valve situated within the gas valve housing, the gas valve having a first or...
03/03/1998
5503549Ultra low power valve for the control of gas flow
A turn down device for regulating gas flow within a gas lamp that is of the general type having a lamp post and a mantel. The device has a conduit configured to allow gas to flow therethrough and a gas supply line connected to the conduit for supplying ga...
04/02/1996
5468142Gas light control apparatus
A dimmer device for a gas light which is solar activated and is composed of a minimum number of parts. A magnetically operated valve with a magnetically attractable ball is energized during daylight hours to close off one passageway yet allows gas to flow...
11/21/1995
5419358Gas monitoring system for a boiler
A gas monitoring system for use with a gas-fired boiler in a house or the like. The boiler is supplied with flammable gas. The system comprises a transducer, a visible and audible alarm circuit, a digital access terminal, an exhaust fan, and alarm systems...
05/30/1995
4974624Gas shut-off device
A gas shut-off device comprising a housing having a gas inflow hole and a gas outflow hole, the housing including therein a first shut-off valve with permanent magnets for closing and opening the gas flow passage, a partition having an opening formed ther...
12/04/1990
4787410Gas shut-off system
This gas shut-off system includes a flow rate sensor (2) for detecting a gas flow rate and a control unit having a miocrocomputer (6) which determines abnormal states such as gas leak when a predetermined flow rate continuously keeps over a predetermined ...
11/29/1988
4549717Heat responsive valve
A safety valve responding to overheating conditions of the surrounding atmosphere, more specifically a combustion gas inlet valve that closes when a fire declares. The valve uses a shape-memory element for detection and command. For the latter function it...
10/29/1985
4349042Fluid shut-off device
A fluid shut-off device is provided which comprises a magnetic valve body provided in a non-magnetic hollow casing for movement between a first position to open a fluid passage and a second position on a valve seat to close the passage, and an annular per...
09/14/1982
4263928Fuel security device
A security device for a fuel such as natural gas having a series circuit of a relay switch, a hazard detecting switch, a relay switch operating coil and a timer. A valve coil is adapted to open and close a main fuel supply valve. The valve coil is connect...
04/28/1981
4262687Electromagnetic valve security device for fuel supplies
An electromagnetic valve circuit used in a fluid line security device is disclosed. The circuit is adapted to open and close a fuel supply pipe. The circuit includes an attracting circuit and a holding circuit connected to one side of a power source. The ...
04/21/1981
4223692Recreational vehicle safety system
A recreational vehicle safety system includes two independently operable automatic shutoff valve assemblies. One valve assembly is attached directly to the recreational vehicle's appliance high-pressure fuel tank in such a manner as to be operable in all ...
09/23/1980
4207912Emergency shut-off valve
An emergency shut-off valve adaptable in a gas supply pipe to shut off the pipe in the time of emergency such as occurrence of an abnormal vibration or gas leak, comprising a hollow body which is open at its top and covered by a cover member, said cover m...
06/17/1980
3955186Character image generation apparatus and CRT phototypesetting system
Apparatus for reproducing characters from cathode ray tubes wherein a beam is deflected onto alpha/numeric characters occupying a selected area of a font. The beam is deflected by relatively high speed linear vertical strokes which are displaced horizonta...
05/04/1976
 
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