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8985964 Multiple switch float switch apparatus  
A float switch apparatus for controlling the energization of multiple electric circuits in response to the level of a liquid in a vessel, and a pump system incorporating same, are provided. The...
8966974 Pivoted float liquid level sensor having a magnetically actuated switch  
A liquid level sensor for use with a container, including a housing with a body defining an interior volume, a switch actuated by an applied magnetic flux field to a closed position, the switch...
8430641 Multiple switch float switch apparatus  
A float switch to control at least two pumps has a guide with two normally-closed micro-switches and a float rod slidably mounted thereto allowing reciprocating vertical movement. The float rod...
8037898 Reservoir tank for vehicle brake system  
A reservoir tank for a vehicle brake system has a tank body including upper and lower shells joined together along mating surfaces. A float and a fluid level sensor are mounted in a fluid level...
7688193 Oil level detection device for internal combustion engine  
An oil level detection device for an internal combustion engine, which comprises: a housing permitting entry therein of oil; a float provided within the housing and vertically movable with the oil...
7094334 Water filter having a filter use time indicator  
The described embodiments of the present invention include a water filter having a float portion with a magnet that moves up and down due to water flow to activate a switch for tracking the use...
6998552 Float-type liquid level switch assembly with light emitting elements  
A float-type liquid level switch includes a main body, a float, a magnetic reed switch, and a light emitting element; the float has a magnet joined thereto, and is displaceable along a length of...
6892573 Side-mountable fluid level sensor  
A side-mounted float sensor has eight components: a reed switch, two leads, a molded connector, a sensor body, a sealing grommet, a float, and an activation magnet. The two leads are assembled to...
6681627 Level sensing safety device functionable in fall-over position  
A safety device for water dispenser includes a magnetic tube, and a float. The tube sticks up on bottom of a water container. A first, and a second magnet switches are disposed in the tube, and...
6679286 Ball tap with a water level switch  
A compact ball tap with 1 a water level switch which comprises a guide standpipe 5 vertically arranged in a tank T, a float 6 slidably installed on the guide standpipe 5, a valve 3, a lever 4...
6552283 Activation flow switch for tankless water heaters  
A flow switch for use in tankless water heaters. The present invention is an activation flow switch for tankless water heaters. More specifically, the flow switch is comprised of polypropylene...
6481278 Hall-effect fine resolution liquid level indicator  
A liquid level indicator apparatus provides direct readout of liquid level at high resolution using an array of vertically disposed Hall-effect magnetic switches. To overcome the limit to closer...
6446506 Fluid level sensing switch  
The present invention provides a fluid level sensing switch for use with a device having a fluid reservoir. The switch is float activated and closes a circuit so as to change an operating...
6380499 Float sensor employing reed switch  
A reed switch in a solid plastic body is positioned by a clip adjacent to a fluid container. A change in fluid level opposite the reed switch moves a magnet connected to a float, turning the reed...
6259860 Humidifier  
A humidifier includes a float positioned at a water outlet of a water tank, and a body containing a water level sensor functioning with the float rising and falling with the level of the water in...
6253608 Side mount liquid level sensor with enhanced float travel  
A side mount liquid level sensor (10) includes limit arms (100, 102) on the float (80) and limit wings (54, 56) on the switch housing, with the limit wings (54, 56) being spaced vertically from...
6199428 Fluid level measuring device  
A fluid level measuring device for measuring a fluid filling level in a container contains a float disposed in the container and a magnet disposed in the container. The magnet is coupled to the...
6195012 Drip annunciator  
A drip annunciator comprises a main body and a needle bottle capable of inserting into a drip bottle for outputting liquid. A buoyancy body is received in the needle bottle, which may move with...
6069331 Flow control vertical switch  
The invention is directed to a flow control vertical switch for starting and stopping electric pump motors and being controlled by the level of a liquid using the flow of the liquid being moved to...
5886312 Switch level control for tank ullage determining system  
A liquid level sensor for a tank includes coaxial inner and outer tubes having lower ends extending into the tank and upper ends projecting from the tank, with the upper end of the inner tube...
5880423 Water level sensor  
A water level sensor includes a magnetic tube and a float disposed on a vertical oval rod portion of the magnetic tube. A magnetic switch is contained in the magnetic tube and connected with a...
5862702 Sealing assembly for the sensing probe of a level detector  
Both ends of a sensing probe are sealed by an assembly including a fixing disk, a sensing probe, a sensing circuit, a floating collar and an external tube is provided. The fixing disk is provided...
5829303 Method and apparatus for measuring a liquid level using a liquid level gauge having reed switches to determine the position of a magnetic float  
A method and apparatus for measuring a liquid level using a liquid level gauge having reed switches to determine the position of a magnetic float. Firstly, providing an elongate float having an...
5827962 Hydraulic brake fluid reservoir level indicator system  
A fluid level indicator for a brake fluid reservoir is disclosed which comprises a socket and circuit board which, once assembled, are installed within a chamber integrally molded with the fluid...
5775877 Submersible motor-driven pump with float switch  
An electric submersible motor-driven pump includes a pump housing (2) in which is located a pump motor (3) and an associated impeller (4). A separate detachable float and switch housing (6) is...
5607002 Chemical refill system for high purity chemicals  
A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is...
5581062 Side-mountable liquid level sensor assembly  
A side-mountable liquid level sensor utilizes a rubber sealing grommet to temporarily hold the buoyant member within the cylinder of the liquid container opening to facilitate assembly. The...
5562423 Automatic float control switch for a bilge and sump pump  
An automatic control for a liquid pump which assures that the pump starts when the liquid reaches a predetermined level and that the pump is stopped when the level has fallen to a second...
5485866 Fluid shut off valve and fill level indication  
A valve to monitor the level of fluid in an above ground storage tank while the tank is being filled, cutoff the flow of fluid when the tank is in a full condition, and as long as the filling...
5435181 Electronic float gauge  
Disclosed herein is an electronic float gauge for indicating the level of liquid in a tank. A float follows the liquid level and causes a rotor that has magnets on it to rotate. Surrounding the...
5426271 Liquid level sensor  
A liquid level sensor is provided with a single piece pivotable device which is used to move a permanent magnet into and out of the detection zone of a magnetically sensitive component, such as a...
5410913 Remote indicating liquid level sensor  
For liquid-level sensing in a tank, the invention provides a tank-mounted first subassembly that is adapted for suspension of a vertical guide from the top of the tank, such that a guided float...
5374790 Liquid level switch assembly  
A liquid level switch assembly is provided which can be adjusted as to what liquid level will actuate the switch. A support bracket is mountable to the tank and a float arm is pivotally mounted to...
5347864 Liquid level measuring apparatus  
An improved liquid level measuring apparatus having a plurality of spaced reed switches having a microprocessor attached to the liquid level measuring sensor apparatus. The switches are wired...
5340281 Protective device for a water-pump apparatus  
A protective device for a water-pump apparatus includes an upright hollow tubular member which is mounted on a top end of a pump unit of the water-pump apparatus, the interior of the tubular...
5324171 Pump assembly including a hermetically sealed switch capsule for housing a magnetically actuated switch  
A pump assembly having a hermetically sealed switch cavity for retaining a magnetically actuated mechanical switch. The assembly includes a housing having a motor cavity and an integral guide for...
5305639 LPG gauge sensor  
A liquid petroleum gas (LPG) gauge sensor unit fits between the units of an existing magnetically-coupled LPG gauge and includes a magnetic field sensing switch, a mechanism to variably position...
5304852 Fluid drop detecting reservoir tank  
A fluid drop detecting reservoir tank has a float with a magnet which moves down in accordance with a drop in the level of fluid in a reservoir tank. The magnet closes a magnetically operated...
5297939 Automatic control for bilge & sump pump  
An automatic control for a liquid pump which assures that the pump starts pumping when the liquid reaches a predetermined level and the pump is stopped when the level has fallen to a second...
5294917 Liquid level sensor using float and magnetic means  
A float-operated switch assembly is mounted in an opening in the top of a tank. It includes a vertical non-magnetic pipe having a pair of floats normally hanging beside it. Each of the floats has...
5262604 Float level switch for a nuclear power plant containment vessel  
This invention is a float level switch used to sense rise or drop in water level in a containment vessel of a nuclear power plant during a loss of coolant accident. The essential components of the...
5254815 Reservoir tank including float with reed switch unit  
A reservoir tank according to the present invention is comprised of a tank body storing an amount of operating fluid, connected to a specific device for supplying thereinto the operating fluid and...
5239285 Low salt level sensor  
A low salt level sensor comprising a float within a brine tank, apparatus for detecting whether the float has risen in response to the addition of a predetermined amount of water to the brine tank...
5224379 Float activated gauge  
A gauge for indicating whether the level of a liquid, such as fuel or oil, in a tank has reached one or more preselected levels. A magnet is mounted in a stem attached atop a float which moves up...
5189726 Steam producing apparatus for home use with low cold water reservoir level steam output stoppage  
The apparatus comprises a boiler (2) provided with an electric resistance heating element (3) arranged to heat and vaporize water, a water reservoir (6) independent of the boiler and a pump (8)...
5159305 Magnet responsive variable differential switching apparatus  
A variable differential switching apparatus comprising first structure for forming first and second magnetic fields presented sequentially along a travel path, the first field being stronger than...
5155311 Float switch assembly for submersible pump  
A magnetically actuated float switch assembly for use with a submersible pump, comprises a float rod with two spaced stops, a movable float carried by the rod which moves between the stops in...
5154079 Remote indicator attachment kit  
A remote indicator attachment kit for use with the mechanical level gauge of an oil tank located in the basement area of a dwelling, to indicate at a remote point the drop in oil level, comprises...
5124686 Tank level alarm control system  
The gauge has an outer tube sealed at its lower end and adapted for attachment to the top wall of the tank, and an inner tube axially movable within the outer tube. A float encircles the outer...
5090212 Cutoff switch for refrigerant container  
A cutoff switch for refrigerant recovery storage container will indicate when the storage container reaches a maximum safe level. The switch will disable the compressor to prevent further recovery...

Matches 1 - 50 out of 295 1 2 3 4 5 6 >