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Class Information
Number: 137/413
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Servo relay operation of control > Fluid pressure
Description: Apparatus in which the float controls the application of fluid pressure for operating the flow control means.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7392822 |
Liquid level controller and pilot switch |
Jul. 1, 2008 |
| 7356856 |
Toilet overflow prevention device |
Apr. 15, 2008 |
| 7352287 |
Pneumatic controller |
Apr. 1, 2008 |
| 7284567 |
Liquid level controller |
Oct. 23, 2007 |
| 7240690 |
Valve assembly with overfill protection device and capacitive liquid level gauge |
Jul. 10, 2007 |
| 7219686 |
Tap assembly for a liquid vessel having an overfill protection device and a float controlled magnetic level gauge |
May. 22, 2007 |
| 6910499 |
Valve assembly for pressurized fluid vessel |
Jun. 28, 2005 |
| 6729367 |
Overflow prevention system and method using laminar-to-turbulent flow transition |
May. 4, 2004 |
| 6640829 |
Valve for a tap of a compressed or liquified gas cylinder, and tap provided with such a valve |
Nov. 4, 2003 |
| 6615863 |
Toilet fill valve tank isolation |
Sep. 9, 2003 |
| 6595236 |
Valve |
Jul. 22, 2003 |
| 6539973 |
Water pressure-assisted flush valve |
Apr. 1, 2003 |
| 6513541 |
Vent valve |
Feb. 4, 2003 |
| 6497246 |
Pneumatic snap pilot |
Dec. 24, 2002 |
| 6354323 |
Liquid level controller |
Mar. 12, 2002 |
| 6311723 |
Flow control valve assembly |
Nov. 6, 2001 |
| 6263905 |
Automatic regulating valve apparatus |
Jul. 24, 2001 |
| 6247492 |
Overfill protection for fuel tanks |
Jun. 19, 2001 |
| 6244829 |
Liquid forced-feed apparatus |
Jun. 12, 2001 |
| 6230730 |
Container having collapsible inline fluid-weight control device |
May. 15, 2001 |
| 6202676 |
Magnetic liquid control for boiler feedwater receivers |
Mar. 20, 2001 |
| 6178994 |
Tap for compressed or liquefied gases having an overcharging prevention function |
Jan. 30, 2001 |
| 6155791 |
Wet/dry glycol pump automatic shut-down system |
Dec. 5, 2000 |
| 6138709 |
Overfill protection device |
Oct. 31, 2000 |
| 6076547 |
Device for operating a mechanism of a rinsing fixture |
Jun. 20, 2000 |
| 6035888 |
Fill valve |
Mar. 14, 2000 |
| 5992448 |
Liquid level controller |
Nov. 30, 1999 |
| 5983919 |
Automatic drain valve |
Nov. 16, 1999 |
| 5920920 |
Straight trap toilet apparatus |
Jul. 13, 1999 |
| 5887609 |
Container having fluid-weight control device |
Mar. 30, 1999 |
| 5850849 |
Storage tank shutoff valve with double cam assembly |
Dec. 22, 1998 |
| 5842500 |
Overfill preventing valve |
Dec. 1, 1998 |
| 5839465 |
Above-ground tank auto-limiter |
Nov. 24, 1998 |
| 5832953 |
Overfill shut-off system for liquid storage tanks |
Nov. 10, 1998 |
| 5829465 |
Container having fluid-weight control device |
Nov. 3, 1998 |
| 5813432 |
Automatic shut-off valve arrangement |
Sep. 29, 1998 |
| 5655565 |
Above-ground tank auto-limiter |
Aug. 12, 1997 |
| 5642752 |
Controllable constant flow regulating lift valve |
Jul. 1, 1997 |
| 5636762 |
System and method for dispensing liquid from storage containers |
Jun. 10, 1997 |
| 5487404 |
Valve for a tap of a compressed or liquified gas cylinder, and tap provided with such a valve |
Jan. 30, 1996 |
| 5460197 |
Valve for a tap of a gas cylinder and tap having such a valve |
Oct. 24, 1995 |
| 5417237 |
Automatic drain valve |
May. 23, 1995 |
| 5383574 |
System and method for dispensing liquid from storage containers |
Jan. 24, 1995 |
| 5191912 |
Liquid level controller |
Mar. 9, 1993 |
| 5080126 |
Float controlled valve |
Jan. 14, 1992 |
| 5025827 |
Structure of fluid level controller of piping type |
Jun. 25, 1991 |
| 5014735 |
Automatic drain valve |
May. 14, 1991 |
| 5007450 |
Add-on liquid overflow shut-off valve for tank |
Apr. 16, 1991 |
| 5004004 |
Automatic drain valve |
Apr. 2, 1991 |
| 4967789 |
Automatic irrigation regulator controlled by water evaporation |
Nov. 6, 1990 |
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