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Class Information
Number: 137/558
Name: Fluid handling > With indicator, register, recorder, alarm or inspection means > Liquid level responsive indicator, recorder or alarm
Description: Apparatus provided with a visual indicator, audible alarm or recorder which is responsive to the level of the liquid in some part of the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7401625 |
System for supplying liquefied gas to a combustion engine with a minimum liquefied-gas level detector |
Jul. 22, 2008 |
| 7314509 |
Gas liquid phase separator with improved pressure control |
Jan. 1, 2008 |
| 7306008 |
Water leak detection and prevention systems and methods |
Dec. 11, 2007 |
| 7302964 |
Housing for a liquid seal vacuum and pressure relief valve apparatus |
Dec. 4, 2007 |
| 7249609 |
Yard hydrant with closure valve check valve |
Jul. 31, 2007 |
| 7246636 |
Hydraulic fluid reservoir and hydraulic system |
Jul. 24, 2007 |
| 7240690 |
Valve assembly with overfill protection device and capacitive liquid level gauge |
Jul. 10, 2007 |
| 7229233 |
Double walled containment sumps |
Jun. 12, 2007 |
| 7219686 |
Tap assembly for a liquid vessel having an overfill protection device and a float controlled magnetic level gauge |
May. 22, 2007 |
| 7218237 |
Method and apparatus for detecting water leaks |
May. 15, 2007 |
| 7216670 |
Drain apparatus with liquid trap and liquid level indicator |
May. 15, 2007 |
| 7174912 |
Shut-off valve assembly |
Feb. 13, 2007 |
| 7171982 |
Hydraulic fluid reservoir and hydraulic system |
Feb. 6, 2007 |
| 7161492 |
Mechanical self-cleaning probe via a jiggler |
Jan. 9, 2007 |
| 7129832 |
High/low level alarm controller |
Oct. 31, 2006 |
| 7111636 |
Leak container for fuel dispenser |
Sep. 26, 2006 |
| 7104278 |
Leak container for fuel dispenser |
Sep. 12, 2006 |
| 7100632 |
Sump liner |
Sep. 5, 2006 |
| 7093611 |
Water feeder controller for boiler |
Aug. 22, 2006 |
| 7066195 |
Two-way trap |
Jun. 27, 2006 |
| 7011102 |
Contained pipeline system with brine filled interstitial space and method for detecting leakage in same |
Mar. 14, 2006 |
| 6962166 |
Hydraulic fluid reservoir and hydraulic system |
Nov. 8, 2005 |
| 6948522 |
Reconstitution device and method of use |
Sep. 27, 2005 |
| 6938635 |
Level switch with verification capability |
Sep. 6, 2005 |
| 6854479 |
Sump liner |
Feb. 15, 2005 |
| 6823886 |
Dispenser containment |
Nov. 30, 2004 |
| 6792923 |
Fuel supply system for vehicle |
Sep. 21, 2004 |
| 6725800 |
Accumulating whistling vent |
Apr. 27, 2004 |
| 6688329 |
Water feeder controller for boiler |
Feb. 10, 2004 |
| 6679286 |
Ball tap with a water level switch |
Jan. 20, 2004 |
| 6675826 |
Automatic flood prevention system |
Jan. 13, 2004 |
| 6675989 |
Windshield washer pump with integrated fluid level sensor |
Jan. 13, 2004 |
| 6671894 |
Toilet overflow control system |
Jan. 6, 2004 |
| 6656871 |
Method for production of catalyst |
Dec. 2, 2003 |
| 6644342 |
Modular integrated wastewater lift station construction kit |
Nov. 11, 2003 |
| 6599857 |
Method for production of catalyst |
Jul. 29, 2003 |
| 6598617 |
Cascaded variable bias feedforward and feedback flow and level control system |
Jul. 29, 2003 |
| 6595239 |
Feed device intended for mounting in a fuel tank |
Jul. 22, 2003 |
| 6595228 |
Vehicle fluid transfer system |
Jul. 22, 2003 |
| 6592126 |
Mechanical seal leak detector |
Jul. 15, 2003 |
| 6588449 |
Diesel fuel shut-off device |
Jul. 8, 2003 |
| 6578602 |
Alarm valve system |
Jun. 17, 2003 |
| 6575193 |
Control valve device of a pressure tank |
Jun. 10, 2003 |
| 6546956 |
Opaque container fluid indicator |
Apr. 15, 2003 |
| 6422263 |
Nested and cascaded variable bias feedfoward and feedback flow and level control system |
Jul. 23, 2002 |
| 6415812 |
Control equipment for keeping light oil vapor at stable pressure and constant temperature |
Jul. 9, 2002 |
| 6311711 |
Method of regulating the level in a buffer tank |
Nov. 6, 2001 |
| 6305404 |
Device for regulating the contents of a container |
Oct. 23, 2001 |
| 6298874 |
Slab gel processing tank |
Oct. 9, 2001 |
| 6287456 |
Filtration system with filtrate volume indicator |
Sep. 11, 2001 |
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