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Browse by Category: Main > Electrical & Energy
Class Information
Number: 307/118
Name: Electrical transmission or interconnection systems > Switching systems > Condition responsive > Fluid pressure, density, level, velocity or humidity
Description: Subject matter in which the system is responsive to fluid pressure, density, level, velocity or humidity.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8412387 Apparatus for controlling a power using a smart device and method thereof Apr. 2, 2013
8238110 Device to shield against interference from electrical appliances Aug. 7, 2012
8194368 Protective electrical wiring device with a center nightlight Jun. 5, 2012
8125108 Remote control transmitter Feb. 28, 2012
7557466 Humidity detection and power cut-off device Jul. 7, 2009
7427844 Switch assembly, electric machine having the switch assembly, and method of controlling the same Sep. 23, 2008
7090943 Regulating the communication of power to components of a fuel cell system Aug. 15, 2006
6970079 High/low level alarm controller Nov. 29, 2005
6892751 System and method for protecting a building May. 17, 2005
6688329 Water feeder controller for boiler Feb. 10, 2004
6675826 Automatic flood prevention system Jan. 13, 2004
6653245 Method for liquid phase deposition Nov. 25, 2003
6646359 Electronic device with a housing for attachment to a pane of a motor vehicle Nov. 11, 2003
6646361 Method of synchronizing the switching of a circuit breaker with voltage waveform Nov. 11, 2003
6636155 Gauge having adjustable activating means Oct. 21, 2003
6612812 Semiautomatic electronic system for sensing and increasing liquid in a containment vessel to a predetermine level Sep. 2, 2003
6584997 Overflow prevention mechanism for liquid transfer systems Jul. 1, 2003
6571625 Fluid level sensor Jun. 3, 2003
6529845 Computer for liquid level measurement Mar. 4, 2003
6523562 Plumbing flood control system Feb. 25, 2003
6522032 Electrical switch and method of generating an electrical switch output signal Feb. 18, 2003
6429548 Pressure switch Aug. 6, 2002
6424059 Gas insulated switching device Jul. 23, 2002
6229229 Liquid sensor for disabling an electrical device May. 8, 2001
6192321 Method of and apparatus for deterministically obtaining measurements Feb. 20, 2001
6186162 Leak detection and shut-off apparatus Feb. 13, 2001
6125870 Overflow protection for a washing machine Oct. 3, 2000
6119715 Automated pneumatic purger Sep. 19, 2000
6114823 Circuit and apparatus for sensing fluid flow Sep. 5, 2000
6060794 Power window device and a control device used for the same May. 9, 2000
6024116 Valve assembly and acuator operative for automatically shutting off water and gas supplies to a hot water heater upon detection of a water leak Feb. 15, 2000
6003536 Automatic water shut-off valve Dec. 21, 1999
5992443 Valve system Nov. 30, 1999
5982047 Pressure switching device Nov. 9, 1999
5973415 Capacitance level sensor Oct. 26, 1999
5965814 Freeze/overflow detector with deactivating mechanism Oct. 12, 1999
5932937 Power control system Aug. 3, 1999
5929532 Method and apparatus for controlling electrical power supplied to a trailer ABS control unit and to an auxiliary circuit responsive to emergency air brake supply line pressure Jul. 27, 1999
5923102 Automatic sub-floor pumping system Jul. 13, 1999
5889466 Apparatus and method of providing power control based on environmental conditions Mar. 30, 1999
5874787 Isolation and positive shut-off system for a fuel dispensing facility Feb. 23, 1999
5857482 System for control of fluid vessel overflows Jan. 12, 1999
5854518 Inline condensation alarm system for a central air conditioning unit Dec. 29, 1998
5847473 Electrical contactor having a double immersion sensing function Dec. 8, 1998
5828307 Hydrocarbon gas monitor desk Oct. 27, 1998
5811894 Safety module Sep. 22, 1998
5798697 Exhaust/supply direction indicator Aug. 25, 1998
5796184 Method and an apparatus for stopping a motor-driven pressure generating pump of a system for coating workpieces with atomized liquid coating material Aug. 18, 1998
5781387 Shock hazard protection system Jul. 14, 1998
5780940 Hot wire safety switch Jul. 14, 1998

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