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Class Information
Number: 174/11R
Name: Electricity: conductors and insulators > With fluids or vacuum > With fluid-condition responsive and/or indicating means

Sub-classes under this class:

Class Number Class Name Patents
174/11BH Bushings 33

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
7642455 Transformer conservator isolation valve (TCIV) Jan. 5, 2010
7210497 Pressure relief device with increased flow rate May. 1, 2007
7122075 Device for reducing the gas and water contamination of transformer oil filling Oct. 17, 2006
6956166 Composite electronic component Oct. 18, 2005
6828502 Fluid release system for secondary conduits extending between a transformer housing and a meter box and method of use Dec. 7, 2004
6806416 Maintenance of fluidic dielectrics in RF devices Oct. 19, 2004
6700061 Composite electronic component Mar. 2, 2004
6522229 Transformer Feb. 18, 2003
6497248 Pressure relief device with one piece gasket Dec. 24, 2002
6355879 Flow-through cable Mar. 12, 2002
6294727 Takeout anchor and protective cover Sep. 25, 2001
6144209 Fluid detection cable Nov. 7, 2000
6063997 Gas insulated electric apparatus May. 16, 2000
5969618 Failure sensor hose Oct. 19, 1999
5918267 Leak detection Jun. 29, 1999
5661405 Elongate sensor having polymeric electrodes filled with conductive particles and having braided sleeves Aug. 26, 1997
5588086 Fiber optic hermetic bulkhead penetrator feedthrough module and method of fabricating same Dec. 24, 1996
5574377 Device for the detection and localization of organic solvent leakages and fabrication process Nov. 12, 1996
5410255 Method and apparatus for detecting and distinguishing leaks using reflectometry and conductivity tests Apr. 25, 1995
5382909 Method for detecting and obtaining information about changes in variables Jan. 17, 1995
5382908 Conductivity or capacity cell and a method for producing the same and a probe including such a cell and a method for measuring of relative humidity with such a probe Jan. 17, 1995
5378995 Low molecular weight organic liquid detection sensor in the shape of a wire and detector using this sensor Jan. 3, 1995
5341128 Sensor element for detection of hydrocarbons Aug. 23, 1994
5319155 Heat and fireproof duct for electrical and communication wires and the like Jun. 7, 1994
5313823 Electrical cable leak detection system May. 24, 1994
5256976 Power apparatus and method of location of a fault in a power apparatus on the basis of attenuation coefficients of electromagnetic coefficients of fault generated electromagnetic waves Oct. 26, 1993
5235286 Method for detecting and obtaining information about changers in variables Aug. 10, 1993
5191991 Housings with safety pressure relief means thereon Mar. 9, 1993
5190069 Apparatus and method for detecting leaks Mar. 2, 1993
5172730 Two-wall leakage detection system for a pipe Dec. 22, 1992
5159276 Capacitance measuring circuit and method for liquid leak detection by measuring charging time Oct. 27, 1992
5146105 Internal pressure explosion-proof system Sep. 8, 1992
5140847 Cable for detecting location of liquids Aug. 25, 1992
5109202 Conductive resin structure for connecting metal conductors Apr. 28, 1992
5084679 Leakage detector using slotted insulated conductors Jan. 28, 1992
5017908 Solvent responsive signal-carrying device May. 21, 1991
5015958 Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors May. 14, 1991
4972179 Liquid leakage detection apparatus including wheatstone bridge Nov. 20, 1990
4963693 Purge enclosure for electrical equipment in hazardous location Oct. 16, 1990
4931741 Branched sensor system Jun. 5, 1990
4926129 Sensor assembly for detecting multiple events and distinguishing between them May. 15, 1990
4918977 Liquid leakage detector line Apr. 24, 1990
4910998 Fluid detection system and method having a coaxial cable with solid, stranded dielectric elements Mar. 27, 1990
4896527 Solvent leak detecting sensor Jan. 30, 1990
4877923 Sensors for detecting and locating liquid leaks Oct. 31, 1989
4862088 Remote locating of a structure and remote measurement of conditions therein Aug. 29, 1989
4862146 Detection apparatus Aug. 29, 1989
4850672 Strain compensated fiber optic cable Jul. 25, 1989
4843305 Spacer-separated liquid leakage sensor Jun. 27, 1989
4843187 Gasket assembly and electrical power transformer including the same Jun. 27, 1989

1 2 3

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