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Class Information
Number: 137/107
Name: Fluid handling > Self-proportioning or correlating systems > Supply and exhaust type > Waste responsive to flow stoppage
Description: Systems wherein a waste or drain is opened in response to the stopping of the fluid flow from the supply to the outlet or receiver.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7431042 |
Pressure releasing device for spray pump |
Oct. 7, 2008 |
| 7401620 |
Yard hydrant with drain port check valve |
Jul. 22, 2008 |
| 7278442 |
Vented port-cap for fire hydrant |
Oct. 9, 2007 |
| 7021909 |
Oscillator for pneumatic pump having single valve |
Apr. 4, 2006 |
| 6978636 |
Device for measuring pressure in automobile air conditioner and charging same with refrigerant and method of same |
Dec. 27, 2005 |
| 6966332 |
Air valve assembly for a fire hydrant |
Nov. 22, 2005 |
| 6789563 |
Pneumatic exhaust controller |
Sep. 14, 2004 |
| 6769450 |
Valve system |
Aug. 3, 2004 |
| 6749130 |
Check line valve faster venting method |
Jun. 15, 2004 |
| 6681796 |
Drainage valve pipe tap assembly |
Jan. 27, 2004 |
| 6279594 |
Flow actuated valve |
Aug. 28, 2001 |
| 6209565 |
Pressure latched poppet cartridge valve |
Apr. 3, 2001 |
| 6209570 |
Automatic flush valve |
Apr. 3, 2001 |
| 5964241 |
Siphon freeze drain valve for underground irrigation systems |
Oct. 12, 1999 |
| 5915405 |
Two-way diverter check valve |
Jun. 29, 1999 |
| 5803111 |
Device for purging water supply line |
Sep. 8, 1998 |
| 5718847 |
Automatic siphon drain apparatus and method |
Feb. 17, 1998 |
| 5669405 |
Apparatus and method for automatically disabling pressure relief valve of backflow preventer |
Sep. 23, 1997 |
| 5640991 |
Siphon freeze drain valve for underground irrigation systems |
Jun. 24, 1997 |
| 5584313 |
Piston pressure-type vacuum breaker |
Dec. 17, 1996 |
| 5441202 |
Misting system with improved couplers |
Aug. 15, 1995 |
| 5439022 |
Lavage valve |
Aug. 8, 1995 |
| 5425393 |
Backflow prevention and detection system |
Jun. 20, 1995 |
| 5397219 |
Integral liquid pump and drainback valve |
Mar. 14, 1995 |
| 5363875 |
Hydraulic disconnector |
Nov. 15, 1994 |
| 5299595 |
Two-way draining valve for coffee making machines |
Apr. 5, 1994 |
| 5240271 |
Tractor-mounted integrated gladhand and quick-release valve for tractor-trailer highway vehicles |
Aug. 31, 1993 |
| 5199260 |
Wastegate actuator control valve for a turbocharger |
Apr. 6, 1993 |
| 5163465 |
Vacuum breaker venting valve |
Nov. 17, 1992 |
| 5163779 |
Drain apparatus |
Nov. 17, 1992 |
| 5151175 |
System to automatically drain filter backwash water |
Sep. 29, 1992 |
| 5094261 |
Non-return valve |
Mar. 10, 1992 |
| 5080527 |
Drain apparatus |
Jan. 14, 1992 |
| 5067519 |
Safety valve for fluid systems |
Nov. 26, 1991 |
| 4976279 |
Self-draining backflow prevention valve |
Dec. 11, 1990 |
| 4953581 |
Self draining valve member for use in underground water lines |
Sep. 4, 1990 |
| 4949747 |
Self-flushing fluid apparatus particularly useful in pulsator devices |
Aug. 21, 1990 |
| 4909270 |
Anti-siphon frost free faucet |
Mar. 20, 1990 |
| 4878515 |
Water access preventer |
Nov. 7, 1989 |
| 4877046 |
Closing and injection valve especially for hot gas defrosting in freezing and cooling installations |
Oct. 31, 1989 |
| 4733919 |
Integrated pressure exhaust valve and fluid coupling |
Mar. 29, 1988 |
| 4700732 |
Faucet drain apparatus |
Oct. 20, 1987 |
| 4646970 |
Hand-held washing device |
Mar. 3, 1987 |
| 4635671 |
Flow and pressure control valve system |
Jan. 13, 1987 |
| 4624279 |
Tube separator with protection against contamination |
Nov. 25, 1986 |
| 4616672 |
Pressure relief and drain valve |
Oct. 14, 1986 |
| 4573491 |
Tube separator |
Mar. 4, 1986 |
| 4561407 |
Control equipment for a pressure wave supercharger |
Dec. 31, 1985 |
| 4559964 |
Valve unit for a washing device of private parts of human body |
Dec. 24, 1985 |
| 4553563 |
Relief valve assembly for use with backflow preventers |
Nov. 19, 1985 |
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