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| Number | Title | Issue Date |
| 7784341 | Liquid monitoring apparatus and method of using same for containers A liquid level sensing device that gives an audible and visual alarm when a low or high liquid level condition in a chemical container is detected. A float switch located at the bottom end of the device closes an electrical circuit, which starts an audio alarm and f... | 08/31/2010 |
| 7661308 | Apparatus and method for determining the depth level and amount of fluids in a well An apparatus and related method for detecting oil and mineralized water, if it exists, in a well. The apparatus comprises a sensor assembly for placing down the well, the sensor assembly having a float therein that rises when fluid is detected and adapted to close a... | 02/16/2010 |
| 7315250 | Electrical fluid activated switch An electrical field activated switch system includes a fluid container 14 having an aperture formed in a sidewall thereof. The floor of the primary tray 22 is positioned entirely beneath the fluid container and a secondary tray is positioned entirely w... | 01/01/2008 |
| 7282660 | Machining fluid level detection device for wire cut electrical discharge machines A table for placing a workpiece is grounded. An electrode for detecting machining fluid level is attached to an upper guide that guides the wire electrode, with the electrode insulated from the upper guide. A voltage is applied to the electrode, and the voltage betw... | 10/16/2007 |
| 7265677 | External device indicating that a tank is filled up System for indicating when a tank is full. The system includes a signal and control box. A container is connected to the tank. The container has a base, a float, an upper portion, and a lower portion. An orifice is arranged at the upper portion of the container. The... | 09/04/2007 |
| 7260499 | Fuel delivery system with enhanced functionality and diagnostic capability A control system for a fuel delivery system provides enhanced functionality and diagnostic capabilities relative to known systems. In accordance with one aspect of the invention, enhanced functionality and diagnostic capability is provided by integrating the pump co... | 08/21/2007 |
| 7251985 | Safety module and measuring arrangement with safety module A measuring arrangement, including: a measuring transmitter with a sensor for registering a property of a medium and for issuing a primary signal dependent on the property; a transmitter housing, with at least one chamber and a first opening on the side facing the m... | 08/07/2007 |
| 7230540 | Liquid level alarm A liquid level alarm is placed in a tank having a bottom and has a weight, a floating box, an alarm circuit and a cord. The weight is placed on the bottom of the tank. The floating box has a top recess, a passage, a slide and a top cover. The passage communicates wi... | 06/12/2007 |
| 7121140 | Liquid quantity sensing device A liquid quantity sensing device which can easily and accurately measure liquid quantity stored in a container is disclosed. It utilizes an infrared ray or a supersonic sensing element associated with a float placed in the measuring tube and an electrical circuit bo... | 10/17/2006 |
| 7082827 | Leak detector An example of an apparatus for detecting the lowering of a top surface of a liquid includes a housing that has a housing hole, and an insertion member attached to the housing. A dowel is inserted into the housing hole, and a float is attached to the dowel. A detecto... | 08/01/2006 |
| 7062967 | Fuel level sensor An apparatus and method are provided for determining the fuel level in a fuel tank. The apparatus includes an acoustic transducer arranged to transmit an acoustic signal and receive a reflected signal. A float remains buoyant at the surface of the fuel in the tank a... | 06/20/2006 |
| 7053782 | Fuel overflow alarm system A fuel overflow alarm system sounds a buzzer or other alarm when a fuel level in a fuel tank of a vehicle or other machine approaches an overflow state, thereby alerting a user that fueling should be halted. The device is activated when a fuel cap or fuel cap cover ... | 05/30/2006 |
| 7043984 | Automatically actuated liquid level sensor A float is arranged in a tubular frame to be unlocked to float in a liquid when the lower end of the frame contacts a bottom surface of a container containing the liquid. A float lock guide and a float lock actuator are mounted in the passage to move the float later... | 05/16/2006 |
| 7036370 | Spring assembly with cantilevered spring rods A spring assembly and an apparatus incorporating the same. The spring assembly includes a base block configured to be rigidly fixed to a frame. A pair of nominally identical spring rods is cantilevered from the base block in a first direction. Each rod has a length,... | 05/02/2006 |
| 7009125 | Electrical fluid activated switch A linear slip to slip coupling has an input portion and an output portion with a common horizontal centerline. A fluid container has a threaded aperture. An adaptor has a threaded input end releasably coupled to the threaded aperture of the container. An unthreaded ... | 03/07/2006 |
| 7000620 | Dishwasher float mounting bracket with retainer cover A float mounting plate is provided for a dishwasher to limit the level of water in the dishwasher tub. The float has a stem extending downwardly through a stand pipe in the bottom of the tub and into a switch bracket which houses the water level control switch. A ta... | 02/21/2006 |
| 7002405 | Linear low noise transconductance cell A low noise transconductance cell includes a resistor and a differential circuit pair having two equivalent half-circuits. Each half-circuit includes a feedback loop coupled to the resistor. The feedback loop includes an input transistor coupled to an inverting gain... | 02/21/2006 |
| 6952962 | Mobile monolithic polymer elements for flow control in microfluidic devices A cast-in-place and lithographically shaped mobile, monolithic polymer element for fluid flow control in microfluidic devices and method of manufacture. Microfluid flow control devices, or microvalves that provide for control of fluid or ionic current flow can be ma... | 10/11/2005 |
| 6938478 | Impedance level meter for liquids in tanks A method and a system for detecting the level of fluid in a container is provided: The level meter includes first, second and third generally parallel probes being positioned within the container. The first probe includes a first portion that is at least partially c... | 09/06/2005 |
| 6925893 | Rotation sensor A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between ... | 08/09/2005 |
| 6907371 | Fuel-level-detection system, calibration method, and calibration system Systems and methods for calibrating operation of a fuel-level indicator of a vehicle are disclosed. The systems and methods include means of determining and/or receiving configuration information about the vehicle and integrating appropriate logic for converting raw... | 06/14/2005 |
| 6848762 | Ink level sensing Ink reservoirs containing binary elements facilitate discrete sensing of ink level within the reservoir. The binary elements are adapted to provide an electrical path in response to an applied electrical signal if the element is immersed in the ink. The binary eleme... | 02/01/2005 |
| 6730865 | Electrical inductance overflow switch system An electrical inductance overflow switch comprises a housing with an upper portion with a main central tube with a hole from top to bottom. A sideways extension runs outwards from the tube and terminates with a mounting clamp with gripping serrations. The lower port... | 05/04/2004 |
| 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 controlling an open-close action of the valve 3 connected with ... | 01/20/2004 |
| 6641240 | Apparatus for measuring the amount of ink remaining in an ink tank An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the ba... | 11/04/2003 |
| 6606906 | Digital conversion adapter for magnetically coupled level meters A digital conversion adapter for magnetically coupled level meters includes a first rotatable magnet located adjacent a second rotatable magnet of a level meter. The first rotatable magnet is operable to rotate in response to rotation of the second rotata... | 08/19/2003 |
| 6571626 | Fuel level sensor A fuel level sensor for use with a vehicle fuel tank includes a magnet carrying float assembly that rises and falls with the fuel level to open and close various magnetically activated reed-switches located at different axial positions along a vertically ... | 06/03/2003 |
| 6559397 | Dishwasher float retainer for dishwasher float switch assembly A float retainer is provided for a dishwasher to limit the level of water in the dishwasher tub. The float has a stem extending downwardly through a stand pipe in the bottom of the tub and into a switch bracket which houses the water level control switch.... | 05/06/2003 |
| 6523405 | Portable bin full indicator A portable bin full indicator is disclosed comprising a sensor operable to send a signal when the level of particulate material in a bin reaches the level of the sensor; means to temporarily secure the sensor in a top portion of the bin; an alarm operativ... | 02/25/2003 |
| 6490922 | System for controlling the level of the liquid contained in a LPG tank or the like A system detects the level of a liquid contained in a liquid gas tank or the like by using a magnet. This system is mounted on a tank (1). The tank is usually provided with a mechanical level indicator. The mechanical level indicator transmits a certain a... | 12/10/2002 |
| 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 spacing of the switches imposed by their vertical dimension,... | 11/19/2002 |
| 6480113 | Water level alarm An alarm system comprising a housing, a float, a battery compartment, a speaker and an alarm where the housing can be connected to the side wall of any container by a suction device fixedly engaged to the housing. The float rises with the water and create... | 11/12/2002 |
| 6464465 | Level control device for a wastewater collection basin A level control device is adapted for use in a wastewater pump station. The level control device cooperates with a discharge pump to control the volume of wastewater contained in the pump station. The level control device includes a buoyant housing for be... | 10/15/2002 |
| 6453741 | Fuel transmitter for non-electrically invasive liquid level measurement A fuel level transmitter (10) consisting of two magnetic rotors (14, 16) placed on opposite sides of a non-ferrous wall (26) are arranged so that when the first rotor (14) is turned, the second rotor (16) follows due to the magnetic coupling between the t... | 09/24/2002 |
| 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 parameter in the event that the volume of fluid in the reservoir fa... | 09/10/2002 |
| 6414598 | Liquid leak detector and alarm system The alarm system is capable of detecting both conductive and non-conductive liquid level increases, designed for indoor operation, and ideally suited for detecting basement flooding or leaky domestic steel oil tanks or other fluid containment devices. A f... | 07/02/2002 |
| 6362742 | Safety float device for air conditioning units A safety float device for air conditioning units for providing easy and convenient installation of a switch to air conditioning systems. The safety float device for air conditioning units includes a switch assembly having a housing, a switch disposed in t... | 03/26/2002 |
| 6253610 | System for monitoring fluid level A wiper for use in a system for monitoring fluid level in a fluid storage container. The wiper has a body portion, a first lengthwise end, a second lengthwise end, a first side, a second side opposite the first side, a width and a pair of resilient contac... | 07/03/2001 |
| 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 the stem (14) of the housing (11) whereby to allow float (80)... | 07/03/2001 |
| 6212950 | Glass interlaced fuel system low current rheostat A fuel level indicator system that utilizes a resistor card having an arc-shaped resistive path with a first set of spaced apart conductor lines and an arc-shaped resistive ink material overlying the first set of conductor lines. There is provided a first... | 04/10/2001 |
