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Class Information
Number: 137/216
Name: Fluid handling > Back flow prevention by vacuum breaking (e.g., anti-siphon devices) > Air vent in liquid flow line
Description: Apparatus wherein the back flow is prevented by an air vent or gap in the liquid flow line.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7543598 |
Vacuum break thermistor housing |
Jun. 9, 2009 |
| 7465399 |
Filtered and unfiltered water ducting in sink fitting |
Dec. 16, 2008 |
| 7387502 |
Method and apparatus for elimination of gases in pump feed/injection equipment |
Jun. 17, 2008 |
| 7357147 |
Modular air gap device and faucet including same |
Apr. 15, 2008 |
| 7353838 |
Top mounted faucet assembly with air gap |
Apr. 8, 2008 |
| 7290557 |
Drain line adapter air gap fitting |
Nov. 6, 2007 |
| 7213608 |
Wasted water draining valve for a drinking water fountain |
May. 8, 2007 |
| 7059341 |
Discharge ducts for pumping water from a supply reservoir to a delivery reservoir |
Jun. 13, 2006 |
| 7047998 |
Gravity flow drain extension for a condensation drain line |
May. 23, 2006 |
| 7017600 |
Faucet |
Mar. 28, 2006 |
| 7011106 |
Modular air gap device and faucet including same |
Mar. 14, 2006 |
| 6971400 |
Air gap apparatus |
Dec. 6, 2005 |
| 6776183 |
Aircraft drain device |
Aug. 17, 2004 |
| 6748966 |
Combination air gap for dish washer and soap dispenser |
Jun. 15, 2004 |
| 6510863 |
Dual inlet air gap |
Jan. 28, 2003 |
| 6499501 |
Conduit system for proximate flow of clean and waste water |
Dec. 31, 2002 |
| 6453931 |
Combination dishwasher and reverse osmosis air gab body |
Sep. 24, 2002 |
| 6435203 |
Apparatus and method for regenerating etchant solution containing metal compound |
Aug. 20, 2002 |
| 6427716 |
Positive displacement hydrant with water discharge path from reservoir |
Aug. 6, 2002 |
| 6279598 |
Mixing eductor |
Aug. 28, 2001 |
| 6269833 |
Spent fuel pool anti-siphon system |
Aug. 7, 2001 |
| 6189558 |
Universal port vacuum breaker adapted for mounting within the upper ends of standpipes of different sizes |
Feb. 20, 2001 |
| 6098651 |
Non-educting back flow prevention device |
Aug. 8, 2000 |
| 5934309 |
Collection assembly incorporating air-break design |
Aug. 10, 1999 |
| 5915406 |
Air gap device for water softener system |
Jun. 29, 1999 |
| 5881753 |
Passive fluid level controller |
Mar. 16, 1999 |
| 5875809 |
Accessory faucet for purified water in a dishwasher air gap system |
Mar. 2, 1999 |
| 5865209 |
Air gap adapter |
Feb. 2, 1999 |
| 5862829 |
Air gap eductor |
Jan. 26, 1999 |
| 5860444 |
Air gap backflow prevention device |
Jan. 19, 1999 |
| 5839474 |
Mix head eductor |
Nov. 24, 1998 |
| 5823430 |
Automatic fertilizing apparatus |
Oct. 20, 1998 |
| 5813702 |
Water softener drain adaptor system |
Sep. 29, 1998 |
| 5797420 |
Proportioner |
Aug. 25, 1998 |
| 5797419 |
Sewer line trap priming assembly and antisiphoning conduit component therefor |
Aug. 25, 1998 |
| 5782112 |
Auto-injection siphon break for washers |
Jul. 21, 1998 |
| 5713385 |
Air gap body for reverse osmosis system |
Feb. 3, 1998 |
| 5681459 |
Refect water drain line installation system and apparatus for under sink reverse osmosis filter system |
Oct. 28, 1997 |
| 5678592 |
Back flow prevention device |
Oct. 21, 1997 |
| 5673725 |
Air gap device with interchangeable parts |
Oct. 7, 1997 |
| 5635058 |
Reject water drain line installation system and apparatus for under sink reverse osmosis filter system |
Jun. 3, 1997 |
| 5592964 |
Air gap anti-siphon System |
Jan. 14, 1997 |
| 5535774 |
Apparatus for storing and supplying water for use in catering equipment |
Jul. 16, 1996 |
| 5522419 |
Chemical eductor with integral elongated air gap |
Jun. 4, 1996 |
| 5518020 |
Proportioner |
May. 21, 1996 |
| 5514344 |
Solution dispenser for air conditioning microorganism control |
May. 7, 1996 |
| 5462079 |
Anti-siphon mixing valve |
Oct. 31, 1995 |
| 5449456 |
Reject water drain line installation system and apparatus for under sink reverse osmosis filter system |
Sep. 12, 1995 |
| 5305778 |
Air gap apparatus |
Apr. 26, 1994 |
| 5253677 |
Chemical eductor with integral elongated air gap |
Oct. 19, 1993 |
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