| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 06/03/1992 | CN2106386U Energy-saving controller characterised by use of electric means |
| 06/03/1992 | CN2106385U Capacity level-sensing device |
| 05/27/1992 | CN2105715U Liquid level self-controller |
| 05/26/1992 | CA1301591C Control mechanism for delivery of gas product at constant pressure |
| 05/19/1992 | CA1301130C Apparatus for filling bags or pouches with a perfusion liquid |
| 05/13/1992 | CN2104466U 水塔水位自动控制器 Automatic water tower controller |
| 04/29/1992 | CN2103158U Multifunction fluid level automatic controller |
| 04/28/1992 | US5108655 Foam monitoring control system |
| 04/22/1992 | CN1060433A Ink level control system for offset printing presses |
| 04/21/1992 | US5105845 Control apparatus for regulating liquid levels in liquid storage tanks |
| 04/16/1992 | DE4033360A1 Floating magnetic switch in milk collector - has float at end of tube sliding through annular space in inlet for milk and cleanser |
| 04/15/1992 | CN1060355A Limit liquid level sensing device with infrared sense |
| 04/14/1992 | US5105085 Fluid analysis system |
| 04/14/1992 | US5103859 Boiling water unit |
| 04/14/1992 | US5103728 Ink level control system for offset printing presses |
| 04/09/1992 | DE4031229A1 Liq. dispenser e.g. for oil - has riser with one magnetic switch corresp. to empty state and another to full state |
| 04/08/1992 | CN2101274U Adaptor for level switch warning signal |
| 04/07/1992 | US5102281 Automatic rate matching system |
| 04/02/1992 | WO1992004855A1 Safety device for domestic appliances through which water flows |
| 04/02/1992 | DE4029620A1 Dispensing method e.g. for fluid, bulk or granular material - using variation of dispenser delivery rate from initial demand dependent value to reduce values near end of process |
| 04/01/1992 | EP0478032A1 Electronic water-control device for ice-making machines |
| 04/01/1992 | CN2100658U Induction water level controller |
| 03/31/1992 | US5100298 Controller for underwater pump |
| 03/25/1992 | EP0476738A1 Electronic device for controlling the level of the ice in a collecting container of a machine for making ice chips |
| 03/25/1992 | CA2052005A1 Universal waterfeeder control circuit |
| 03/24/1992 | US5098452 With displacement body, plexifilamentary spin-cell |
| 03/19/1992 | DE4029375A1 Control or switch unit for container level - admits fluid to control chamber to operate switch by lifting float |
| 03/18/1992 | CN2099332U Self-control protector for motor of bittern recovering machine |
| 03/17/1992 | US5096657 Reactor coolant void detection system |
| 03/05/1992 | WO1992003600A1 Method for controlling the level of solvent vapor in a vessel |
| 03/04/1992 | CN2097856U Water pump control unit |
| 02/26/1992 | CN2097416U Frequency discrimination type controller for water level |
| 02/25/1992 | US5090212 Cutoff switch for refrigerant container |
| 02/25/1992 | US5090128 Device for measuring or controlling change of level between several points |
| 01/29/1992 | CN2094762U Force sensitive automatic water consumption controller |
| 01/28/1992 | US5083461 Low friction trunnion bearing and high pressure seal |
| 01/15/1992 | CN2093413U Multifunctional fully automatic water level controlling switch |
| 01/15/1992 | CN2093412U Fully automatic multifunctional electric water heater |
| 01/07/1992 | US5078578 Pneumatic device for detecting hydrometric level |
| 01/07/1992 | US5078577 Automatic bilge pumping and alarm unit |
| 01/02/1992 | DE4029385C1 Measuring molten metal level - by calculating difference between reference pressure of container and measured pressure using computer |
| 12/11/1991 | CN2090548U Automatic liquid level controller |
| 12/11/1991 | CA2018694A1 Process for checking and regulating the interpolar distance and the concentration of alumina in the electrolytic cells for aluminum production |
| 12/04/1991 | EP0459755A1 Ink level control system for offset printing presses |
| 12/04/1991 | CN1056757A High-temp. high-pressure dye groove shape's microcomputer control system |
| 12/03/1991 | US5069243 Liquid level control system |
| 11/13/1991 | CN2088711U Multi-function automatic water pumping control box |
| 10/31/1991 | WO1991016264A1 Liquid dispensing system including air evacuating apparatus |
| 10/29/1991 | US5060484 Bin level control circuit and transducer mounting system for an ice making machine |
| 10/23/1991 | CN2087356U Inductive liquid-level stepless-setting auto-control instrument |
| 10/09/1991 | EP0451128A1 Low friction trunnion bearing and high pressure seal |
| 10/09/1991 | CN2086428U Water level logic automatic controller |
| 09/18/1991 | CN2085076U Liquid detector with magnetic induction |
| 09/18/1991 | CN1013995B Device for dispensing predetermined quantity of liquid |
| 09/17/1991 | US5049270 Filter apparatus having liquid control mechanism |
| 09/12/1991 | DE4007282A1 Measurement and control for water outflow from raw overflow tank - contains measurement device in outflow pipe of rain overflow tank with motorised selector and level sensor in static chamber |
| 09/11/1991 | EP0445480A2 Device for measuring or monitoring differences in level between several points |
| 09/06/1991 | CA2011536A1 Control valve |
| 09/04/1991 | EP0445089A1 Overboiling protection for a steam generator |
| 09/03/1991 | CA1288502C Pressure activated pump-off control |
| 08/20/1991 | US5040564 System for exchanging containers while in operation |
| 08/14/1991 | CN2082871U Fully automatic liquid level controller |
| 08/13/1991 | US5038840 Bubbler container automatic refill system |
| 08/07/1991 | CN1053689A Multifunctional remote level controller |
| 08/06/1991 | US5036892 Automatic control system for filling beverage containers |
| 08/06/1991 | US5036661 Regulated level accumulator for liquid under high pressure |
| 07/31/1991 | CN1053484A Diaphragm type liquid level valve |
| 07/30/1991 | US5035581 Fluid level monitoring and control system |
| 07/30/1991 | US5035346 United liquid-level and pressure regulator for separators |
| 07/24/1991 | CN2081548U Liquid-level controller |
| 07/23/1991 | US5033646 Liquid dispensing system including air evacuating apparatus |
| 07/09/1991 | US5029602 Automated chemical storage and chemical feed system |
| 07/03/1991 | EP0435814A2 Refrigerant flow control device |
| 07/03/1991 | CN1052644A Apparatus for controlling filling liquid into container |
| 06/26/1991 | EP0433641A2 Device for controlling the flow of fluid to a container |
| 06/26/1991 | CN2079771U Telemetering alarm for water level |
| 06/25/1991 | US5027075 Apparatus for determination of probe contact with a liquid surface |
| 06/19/1991 | CN2079319U Electronic liquid level, flow rate automatic controller |
| 06/19/1991 | CN2079318U Liquid cup level alarm device |
| 06/13/1991 | WO1991008530A1 Control apparatus |
| 06/05/1991 | CN2078459U Dual-coloured liquid level monitoring alarm with secondary display |
| 05/29/1991 | DE3938742A1 Redundant overfilling protection appts. for dangerous liquids=gases - contains mutually independent electrical control chains, gives manual alarm and performs automatic cut-off probe faults |
| 05/21/1991 | US5016666 Automated chemical storage and chemical feed system |
| 05/16/1991 | DE3937931A1 Liq. flow rate regulator - comprises chamber whose inlet valve is controlled by a float regulates the flow of liq. into sewage works, ponds etc. |
| 05/15/1991 | CN1051437A Central monitoring and automatic control system for water supply tank in high building |
| 05/14/1991 | US5015152 Battery monitoring and charging circuit for sump pumps |
| 05/14/1991 | CA1284077C Level controller |
| 05/01/1991 | CN2076253U Automatic liquid level controller |
| 04/30/1991 | US5012429 Method and apparatus for optimization of feedwater heater liquid level |
| 04/24/1991 | CN2075796U 多功能自动控制器 Multifunctional automatic controller |
| 04/23/1991 | US5009079 Refrigerant flow control device |
| 04/17/1991 | EP0422305A1 Float chamber |
| 04/17/1991 | CN2075360U Water level monitor |
| 04/10/1991 | CN2074922U Indirect liquid volume display alarm device |
| 04/03/1991 | CN2074473U Charge and liquid level auto-controller |
| 04/02/1991 | US5004400 Automatic rate matching system |
| 03/27/1991 | CN2074026U Object position controller |
| 03/21/1991 | WO1991003679A1 Liquid nitrogen refilling device |
| 03/20/1991 | CN2073598U Infrared-sensing limit-level sensor |
| 03/13/1991 | CN2073129U Energy-saving liquid level controller |