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Class Information
Number: 137/142
Name: Fluid handling > Siphons > With flow starting, stopping or maintaining means
Description: Apparatus having means for applying pressure to initiate, stop or maintain liquid flow, to vent air for starting, stopping or maintaining siphon flow, or for controlling the flow by opening, closing or variably restricting the main flow path of the siphon.










Sub-classes under this class:

Class Number Class Name Patents
137/146 Plunge or immersion starting 7
137/145 Pressure applied to liquid in supply chamber 13
137/147 Pump or liquid displacement device for flow passage 28
137/150.5 Siphon inlet movable to and from seat 3
137/143 Siphon venting or breaking 40
137/144 With leakage or entrained air removal 4
137/151 With valve or closure in-flow passage 32


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8443828 Siphon weir valve for high flow municipal water treatment systems May. 21, 2013
8444494 Transmission input shaft blade May. 21, 2013
8226123 Fuel tank Jul. 24, 2012
8029022 Fuel tank Oct. 4, 2011
7686023 Pressure washing system, components and methods Mar. 30, 2010
7654278 Level control for liquid throughfeed Feb. 2, 2010
6938612 Auxiliary fuel dispensing system Sep. 6, 2005
6918404 Irrigation and drainage based on hydrodynamic unsaturated fluid flow Jul. 19, 2005
6871640 Saddle tank siphon primer Mar. 29, 2005
6766817 Fluid conduction utilizing a reversible unsaturated siphon with tubarc porosity action Jul. 27, 2004
6669840 Filter for a carpet cleaning system Dec. 30, 2003
6607005 Fuel tank Aug. 19, 2003
6474356 Device for controlling a liquid flow Nov. 5, 2002
6312191 Self-contained ecological watering system Nov. 6, 2001
6216720 Siphon adapter Apr. 17, 2001
6178984 Self-priming siphon, in particular for irrigation Jan. 30, 2001
6012481 Constant-level fluid supplier Jan. 11, 2000
5832948 Liquid transfer system Nov. 10, 1998
5779884 Automatic water changing system and apparatus for aquariums Jul. 14, 1998
5718847 Automatic siphon drain apparatus and method Feb. 17, 1998
5624573 Apparatus for the disinfection of a flowing liquid medium and a plant for the treatment of clarified sewage Apr. 29, 1997
5566706 Siphoning device to attain desired water level in pools and the like Oct. 22, 1996
5552022 Desalination system utilizing transfer conduit extending above salt water siphon height Sep. 3, 1996
5358000 Siphon pump having a metering chamber Oct. 25, 1994
5301375 Primer tank-checkvalve syphon toilet flushing apparatus Apr. 12, 1994
5282979 Desalination system having rechargeable syphon conduit Feb. 1, 1994
5234016 Siphon tube apparatus Aug. 10, 1993
5179969 Method and apparatus for free-standing water removal from roof and siphon head therefor Jan. 19, 1993
5113536 Jet activated toilet flushing apparatus May. 19, 1992
5063959 Method and apparatus for free-standing water removal from roof and siphon head therefore Nov. 12, 1991
5035535 Device for regulating the flow in a drainage siphon tube Jul. 30, 1991
5009261 Device for providing communication between water tanks of heat accumulation tank system Apr. 23, 1991
4951699 Fuel transfer system with aspirator Aug. 28, 1990
4911211 Apparatus and method for changing coolant in vehicle cooling system Mar. 27, 1990
4887667 Device for providing communication between water tanks of heat accumulation tank system Dec. 19, 1989
4717284 Device for draining soils in depth Jan. 5, 1988
4703771 Vehicle fuel tank Nov. 3, 1987
4651767 Conveyor dewatering system Mar. 24, 1987
4611622 Drain for condensate from flue gas Sep. 16, 1986
4579139 Siphon starter Apr. 1, 1986
4540014 Hydraulic memory device Sep. 10, 1985
4513768 Solar actuated drain system Apr. 30, 1985
4479274 Swimming pool siphon Oct. 30, 1984
4425932 Siphon ladling apparatus Jan. 17, 1984
4406300 Roof siphon drain Sep. 27, 1983
4324481 Developing machine for radiation-sensitive material Apr. 13, 1982
4321219 Steam cleaner Mar. 23, 1982
4303092 Siphonic irrigation apparatus Dec. 1, 1981
4291836 Intermittent water-supply system Sep. 29, 1981
4171709 Device for siphoning water from a ponding area on a flat roof Oct. 23, 1979

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