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Class Information
Number: 137/217
Name: Fluid handling > Back flow prevention by vacuum breaking (e.g., anti-siphon devices) > Air vent in liquid flow line > Valved
Description: Apparatus wherein the air vent is provided with a valve.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7032618 |
Plumbing fixture block |
Apr. 25, 2006 |
| 6481530 |
Engine pre-lubrication system |
Nov. 19, 2002 |
| 6439939 |
Siphon inhibiting device for a marine cooling system |
Aug. 27, 2002 |
| 6317905 |
Spout with vacuum breaker protection |
Nov. 20, 2001 |
| 6125875 |
Pullout faucet value body with integral vacuum breaker hub |
Oct. 3, 2000 |
| 6032686 |
Cartridge valve with vacuum breaker |
Mar. 7, 2000 |
| 5947784 |
Apparatus for producing toroidal bubbles and method |
Sep. 7, 1999 |
| 5839464 |
Cartridge valve with vacuum breaker |
Nov. 24, 1998 |
| 5803112 |
Reflux valve means |
Sep. 8, 1998 |
| 5564457 |
Vacuum breaker valve with CIP capability |
Oct. 15, 1996 |
| 5533546 |
Assembly for prevention of backflow in valves |
Jul. 9, 1996 |
| 5487406 |
Drain control valve and manifold system |
Jan. 30, 1996 |
| 5404898 |
Anti-syphon fluid control valve apparatus and method |
Apr. 11, 1995 |
| 5372158 |
Valve with backflow preventer |
Dec. 13, 1994 |
| 5360029 |
Vacuum breaker |
Nov. 1, 1994 |
| 5329957 |
Fluid flow system vacuum breaker |
Jul. 19, 1994 |
| 5325885 |
Anti-siphon device for sanitary appliance |
Jul. 5, 1994 |
| 5304116 |
Vaginal cleansing device |
Apr. 19, 1994 |
| 5285808 |
Diverting relief valve backflow |
Feb. 15, 1994 |
| 5240029 |
Hose-type faucet with backflow preventer |
Aug. 31, 1993 |
| 5199455 |
Anti-siphon device for drain conduits |
Apr. 6, 1993 |
| 5133498 |
Apparatus for dispensing/applying a material |
Jul. 28, 1992 |
| 5103856 |
Anti-siphoning valve assembly |
Apr. 14, 1992 |
| 5082017 |
Anti-siphon ball cock with volume control |
Jan. 21, 1992 |
| 4998554 |
Food pasteurization system vacuum breaker |
Mar. 12, 1991 |
| 4991623 |
Automatic air valves for ducts |
Feb. 12, 1991 |
| 4969483 |
Device against siphon back flow, for hydraulic valves having a cartridge with plane plates for flux control |
Nov. 13, 1990 |
| 4921258 |
Adapter seal |
May. 1, 1990 |
| 4834621 |
Air throttling valve for submerged pump system |
May. 30, 1989 |
| 4827538 |
Mixing fixture for flexible-pipe spray head |
May. 9, 1989 |
| 4811753 |
Recreational vehicle drain vent |
Mar. 14, 1989 |
| 4805661 |
Faucet valve with anti-siphon back flow preventer |
Feb. 21, 1989 |
| 4712574 |
Vacuum-breaking valve for pressurized fluid lines |
Dec. 15, 1987 |
| 4696322 |
Faucet valve with anti-siphon back flow preventer |
Sep. 29, 1987 |
| 4646775 |
Vacuum breaker |
Mar. 3, 1987 |
| 4637080 |
Air volume control |
Jan. 20, 1987 |
| 4586692 |
Flushometer valve integrable with a structure |
May. 6, 1986 |
| 4545398 |
Venting device |
Oct. 8, 1985 |
| 4508136 |
Anti-syphon flow control valve |
Apr. 2, 1985 |
| 4424058 |
Drainage control method and apparatus |
Jan. 3, 1984 |
| 4410001 |
Anti-siphon selector valve |
Oct. 18, 1983 |
| 4326671 |
Anti-siphon selector valve |
Apr. 27, 1982 |
| 4324506 |
Self-regulating fluid control valves |
Apr. 13, 1982 |
| 4316480 |
Sequencing valve |
Feb. 23, 1982 |
| RE30849 |
Anti-siphon and backflow prevention valve |
Jan. 19, 1982 |
| 4306585 |
Constant flow valve |
Dec. 22, 1981 |
| 4303614 |
Distilling unit |
Dec. 1, 1981 |
| 4125124 |
Sequencing valve |
Nov. 14, 1978 |
| 4005725 |
Automatic closure valve for water sprinkler |
Feb. 1, 1977 |
| 3943958 |
Continuous air removal valve |
Mar. 16, 1976 |
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