Class 137/101.27 - Float controlled weir or valve

Subclass of Class 137 - Fluid handling
Definition: Subject matter wherein a weir or valve is responsive to
No. of patents: 28
Last issue date: 04/15/2008

Number	Title	Issue Date
7357149	Auxiliary fuel tank systems for aircraft and methods for their manufacture and use Auxiliary fuel tank systems for aircraft and methods for their manufacture and use. In one embodiment, an aircraft can include a fuselage, at least one engine, and a fuel system configured to distribute fuel to at least one of the engine and an aerial refueling mani...	04/15/2008
7201178	Continuous chemical feeder and method of use thereof A method of providing a continuous, sequential, and cyclic, if desired, liquid feed to a processor from a plurality of containers, which comprises feeding the liquid from a first of the containers through a first conduit to a reservoir having a float valve, to keep ...	04/10/2007
7143781	Flexible bladder apparatus for fluid flow control The present invention provides an apparatus and method for controlling the flow of fluids through a conveyance with a hydraulic valve including a flexible portion. The flexible portion is positioned in the conveyance so that fluid enters the membrane from an upper c...	12/05/2006
6474361	Floating weir assembly and fluid flow management system comprising same A floating weir assembly for controlling the discharge of fluid from a fluid reservoir. The weir assembly includes a buoyant body preferably comprising a sidewall surrounding a central bottom opening. A weir is provided on the inside surface of the sidewa...	11/05/2002
6238577	Self-leveling weir The present invention provides a barrier over which waste water must flow in order to reach the outlet of a wastewater treatment plant. The barrier provided by the weir allows wastewater to exit the plant, while keeping solids that are in suspension to re...	05/29/2001
6224753	Water catchment device floating at the surface of a basin and supplying a pumping system A water catchment device floating at the surface (19) of a basin comprising: a floating support (1) having a support base (3); and a skimmer (4) retained on the base (3) and comprising a skimmer body (5) which can be vertically displaced above the base (3...	05/01/2001
6131601	Fluid mixing apparatus A reduced pressure shut off assembly for an eductor mixing system wherein a vacuum shut off valve is activated by reduced pressure in a reduced pressure line connected to a container for a concentrate. In a preferred embodiment, an eductor and the vacuum ...	10/17/2000
5704389	Waste line stoppage detector and automatic water shutoff system A waste line stoppage detector and automatic water shutoff system is utilized to prevent the overflow of raw sewage from a plumbing fixture. Electronic shutoff valves are electronically connected to a waste line stoppage detector. One application involves...	01/06/1998
5567283	Caustic concentration regulator for chlorine generators An electrolytic chlorine gas generating system is disclosed. The system includes an electrolytic cell generating the chlorine gas, a brine tank supplying saturated brine to the anode compartment of the cell, and an acid feed tank containing hydrochloric a...	10/22/1996
5213694	Water treatment control system for treating cooling tower makeup water An apparatus and method for controlling the amount and concentration of make-up water and chemicals introduce into the recirculating water of a cooling tower system. A float operated make-up valve controls the addition of make-up water to the tower. As ma...	05/25/1993
5092377	Bucket and fluid-metering device therefor In combination with a portable liquid container such as a bucket (20), a liquid-dispensing device (26) is disclosed. Device (26) automatically meters a desired quantity of a dilutable liquid concentrate into bucket (20) whenever bucket (20) is filled to a...	03/03/1992
5061450	Isolation fluid control device and water cup An isolation fluid control device and water cup for use in an automated, random-access, isolation fluid-based, analytical instrument. The cup, in operation, contains two immiscible liquids. The cup is provided with inlets and outlets, and additionally com...	10/29/1991
4742939	Remote soda-circulating beverage dispenser The recirculating beverage dispenser unit comprises a cooling unit, a carbonation unit, an inlet connection between a source of fresh water and the cooling unit, a fresh water valve and spigot, a delivery conduit coupling the fresh water valve and spigot ...	05/10/1988
4704140	Procedure and means for use in pumping and volumetry of foodstuff liquids The invention concerns a procedure and a means for use in pumping and volumetry of foodstuff liquids. According to an embodiment of the invention, the foodstuff liquid is conducted through a suction pipe (14) or a suction tube into an air separator (16) a...	11/03/1987
4414996	System for automatically dispensing liquid chemicals into an intermittently flowing liquid stream System for automatically dispensing a liquid treatment chemical from a replaceable supply bottle into an intermittently flowing liquid stream such as a recirculating water supply for a refrigeration system. The system has a feeder chamber into which the l...	11/15/1983
4321939	Multi-liquid flow proportioning device This invention concerns a multi-liquid flow proportioning device comprising a vessel adapted to contain a first liquid, a container within said vessel adapted to hold a second liquid separate from said first liquid, separate inlet and outlet means respect...	03/30/1982
4312595	Automatic fluid mixing system and a multi compartmented container therefore An automatic fluid mixing system is disclosed which, in its preferred embodiment, discontinuously opens a disposable multi-compartmented module to permit the mixing of initially released contents before the subsequent opening of remaining compartments, fl...	01/26/1982
4300489	Pipe closing device The device is especially intended for a pipe supplying a fluid which must be supplied, simultaneously or alternately, with another fluid. The device comprises a tank for a control fluid which surrounds the vertical supply pipe and in which a permanent mag...	11/17/1981
4289713	Automatic flushing and draining reservoir apparatus for evaporative coolers Apparatus for automatically draining the water from an evaporative cooler when operation thereof is terminated and for periodically draining, flushing and replacing the water during operation of the cooler. The apparatus includes a comparatively small res...	09/15/1981
4263932	Accurate dosing of regenerating fluid to processing-fluid-tank in film developing machine The film developing machine includes a tank containing developing fluid, to which a dosing device continually adds regenerating fluid received from a regenerating-fluid supply tank. To prevent the gradual emptying of the supply tank from producing an accu...	04/28/1981
4255361	Automatic flushing and draining reservoir apparatus for evaporative coolers A pump, siphon drain valve, and at least the float portion of a float controlled shutoff valve are located in a comparatively small water reservoir tank which is dependingly formed in the floor pan of an evaporative cooler to locate the cooler's water sup...	03/10/1981
4252142	Apparatus for discontinuously diluting a liquid in another liquid, to a given level of concentration Apparatus for discontinuously diluting a liquid in another liquid, to a predetermined level of concentration, comprising a metering container provided with a means for automatically limiting the filling thereof to a predetermined level, a tank for liquid ...	02/24/1981
4217054	Fluid mixing and dispensing system A fluid mixing system and method is disclosed for automatically mixing precise concentrations of photographic processing chemistry to be used in an X-ray film processor. The system produces a fresh batch of mixed solution whenever a previous batch has bee...	08/12/1980
4126103	Control apparatus for automatic removal of milking means A primary valve has an open position for effecting operation of a milking means remover upon completion of a milking operation. A secondary valve has a first position for causing a pneumatic actuator to maintain the primary valve closed in response to nor...	11/21/1978
4116586	Constant fluid level control for machine reservoir A housing contains a slidable spool operable to port a first pressurized fluid line to a fluid motor, and a housing reservoir has a float movable with a fluid level. The motor drives a pump which "pumps down" the reservoir. A second pressurized fluid line...	09/26/1978
4103358	Fluid mixing and dispensing system A fluid mixing system and method is disclosed for automatically mixing precise concentrations of photographic processing chemistry to be used in an X-ray film processor. The system produces a fresh batch of mixed solution whenever a previous batch has bee...	07/25/1978
4015629	Adjustable flow floating weir assembly An adjustable-flow floating weir assembly is provided for regulating the flow of liquid out of a basin which receives a constant or variable flow of liquid. The weir assembly communicates with the exterior of the basin and has notches through which liquid...	04/05/1977
3935881	Apparatus for steady-state volume rate flow control An apparatus for steady-state volume rate flow control from a variable depth liquid having a floating weir assembly of the type with an inlet weir crest over which liquid may flow from said weir crest to a discharge opening through which liquid may flow f...	02/03/1976

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Class 137/101.27 - Float controlled weir or valve