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Class Information
Number: 137/218
Name: Fluid handling > Back flow prevention by vacuum breaking (e.g., anti-siphon devices) > Air vent in liquid flow line > Valved > With co-acting valve in liquid flow path
Description: Apparatus wherein a valve is provided in the liquid flow path which operates in conjunction with the air vent valve.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7575016 |
Pipe disconnector with increased sealing power |
Aug. 18, 2009 |
| 7543599 |
Siphon and backflow resistant valve |
Jun. 9, 2009 |
| 7497228 |
Freeze and backflow protection for a subterranean water flushing system |
Mar. 3, 2009 |
| 7458388 |
Freeze safe valve |
Dec. 2, 2008 |
| 7409964 |
Faucet type valve with backflow control in handle structure |
Aug. 12, 2008 |
| 7293576 |
Single-piece manifold with reduced pressure arrangement |
Nov. 13, 2007 |
| 7191962 |
Sprayer apparatus with backflow valve |
Mar. 20, 2007 |
| 7100637 |
Wall hydrant having backflow preventor |
Sep. 5, 2006 |
| 7093608 |
Vacuum pressure breaker and freeze protection for a water flushing system |
Aug. 22, 2006 |
| 7059340 |
Valve assembly for pipe disconnectors |
Jun. 13, 2006 |
| 7013910 |
Back flow preventer made of at least two different types of material |
Mar. 21, 2006 |
| 7004187 |
Line pressure diverter apparatus |
Feb. 28, 2006 |
| 6935358 |
Flow controlling hydrant structure |
Aug. 30, 2005 |
| 6923426 |
Relief valve for use in a diaphragm flush valve |
Aug. 2, 2005 |
| 6913033 |
Diverter valve with removable cartridge including integral atmospheric type vacuum breaker and check |
Jul. 5, 2005 |
| 6913032 |
Sanitary faucet unit |
Jul. 5, 2005 |
| 6910495 |
Backflow prevention system |
Jun. 28, 2005 |
| 6904931 |
Vacuum breaker with water leak containment device |
Jun. 14, 2005 |
| 6899120 |
Yard hydrant |
May. 31, 2005 |
| 6857446 |
Flow controlling dual hydrant |
Feb. 22, 2005 |
| 6805154 |
Freeze protection device for wall hydrants/faucets |
Oct. 19, 2004 |
| 6792962 |
Enhanced backflow prevention apparatus and method |
Sep. 21, 2004 |
| 6779549 |
In-line vacuum breaker |
Aug. 24, 2004 |
| 6776183 |
Aircraft drain device |
Aug. 17, 2004 |
| 6769450 |
Valve system |
Aug. 3, 2004 |
| 6761183 |
Back flow preventing adjustable valve apparatus with fluid escape |
Jul. 13, 2004 |
| 6757920 |
Hand spray mounts with integral backflow prevention |
Jul. 6, 2004 |
| 6755209 |
Fill valve assembly for a flush tank |
Jun. 29, 2004 |
| 6752167 |
Freeze resistant automatic draining wall hydrant with dual check vacuum breaker |
Jun. 22, 2004 |
| 6672096 |
Vacuum-breaking valve for refrigeration appliances |
Jan. 6, 2004 |
| 6648003 |
Backflow preventer |
Nov. 18, 2003 |
| 6611971 |
Hand spray mounts with integral backflow prevention |
Sep. 2, 2003 |
| 6609854 |
Structure and method for detecting an inflated state of a flexible membrane dam |
Aug. 26, 2003 |
| 6554018 |
Water closet flushing system |
Apr. 29, 2003 |
| 6539973 |
Water pressure-assisted flush valve |
Apr. 1, 2003 |
| 6532986 |
Freeze protection device for wall hydrants/faucets |
Mar. 18, 2003 |
| 6513543 |
Backflow preventer valve |
Feb. 4, 2003 |
| 6502768 |
Water spraying gun |
Jan. 7, 2003 |
| 6446652 |
Backflow preventer assembly |
Sep. 10, 2002 |
| 6443181 |
Backflow prevention apparatus |
Sep. 3, 2002 |
| 6415810 |
Water hammering prevention device |
Jul. 9, 2002 |
| 6397878 |
High pressure hose drop backflow/back siphonage preventers |
Jun. 4, 2002 |
| 6386223 |
Back flow preventing valve apparatus, with multiple check valves |
May. 14, 2002 |
| 6382236 |
Laboratory faucet and method of production |
May. 7, 2002 |
| 6374849 |
Test cock apparatus with freeze protection capability |
Apr. 23, 2002 |
| 6354326 |
Toilet fill valve with improved noise abatement |
Mar. 12, 2002 |
| 6325090 |
Backflow preventer assembly |
Dec. 4, 2001 |
| 6244292 |
Ballcock valve for water tanks |
Jun. 12, 2001 |
| 6227219 |
Flush relief valve having improved vacuum breaker |
May. 8, 2001 |
| 6196246 |
Freeze-resistant plumbing system in combination with a backflow preventer |
Mar. 6, 2001 |
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