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| Number | Title | Issue Date |
| 7977591 | Liquid level monitor including electromechanical float switch having reduced liquid migration into the switch A liquid level monitor (100) includes a liquid bowl cavity (102) having a liquid sampling port (106). A switching device cavity (104) is formed within an upper portion of the housing (105) having an electromechanical switching devi... | 07/12/2011 |
| 7696445 | Oil level detecting switch Oil level detecting switch, which detects an amount of lubricant oil stored in an oil pan, includes: a switch case having through-holes to permit entry and discharge of oil into and out of the switch case; a float of a spherical shape having smaller specific gravity... | 04/13/2010 |
| 7615716 | Position responsive switch A position responsive switch. A position responsive switch comprises of a two chamber housing having a first and a second chamber. An aperture is disposed between the two chambers. A first lead wire and a second lead wire extend through the second chamber. A first a... | 11/10/2009 |
| 7521639 | Safety switch A safety switch for sensing the level of water in a condensate pan has a molded plastic body with an attachment section and a float probe. The attachment section includes a collar that fits over and connects to the side edge of the condensate pan. The float probe co... | 04/21/2009 |
| 7420134 | Fluid level switch The present invention provides a float level switch featuring a housing; an actuator shaft arranged in the housing; and a low force shaft seal assembly arranged between the actuator shaft and the housing, having a combination of disks or seals, one being made of a s... | 09/02/2008 |
| 7414209 | Liquid level sensor switch A liquid level sensor switch comprising a case, a rod type guide vertically extending from an inside bottom center of the case, a float having a center bore fitted on the guide with a clearance allowing the float to freely move up and down along the guide inside the... | 08/19/2008 |
| 7347255 | Device for detecting water in product-only pump flow stream A device for detecting the presence of water in a product-only hydrocarbon pump system particularly used for the removal of subterraneous hydrocarbons from a remediation site through a well. The device comprises a sealed float switch chamber, positioned either upstr... | 03/25/2008 |
| 7334536 | Pop-up sewer backup indicator An improved sewer backup indicator. The sewer backup indicator is installed into a sewer cleanout cap housing which comprises a pop-up device that detects and holds the detection of a back up in the sewer system, which is due to number of reasons. This invention hel... | 02/26/2008 |
| 7325565 | Backflow valve The backflow valve of the present invention includes a valve housing having a cavity therein with an inlet and an outlet to the valve cavity. A switch is in communication with the valve cavity and is moveable from an off position to an on position in response to liq... | 02/05/2008 |
| 7322234 | Watertight fuel-gauge housing A watertight fuel-gauge housing comprises a housing at least partially positioned in the interior of a fuel tank; a gauge mechanism within said housing for providing an indication of the level of fuel within said tank according to the position of a floating device c... | 01/29/2008 |
| 7321102 | Float switch transient suppression device A float switch system for limiting to desirable levels current and energy entering a tank of combustible liquid comprises: a float switch disposed within the tank; an interface circuit external to the tank and coupled through wiring to the float switch; a passive tr... | 01/22/2008 |
| 7271359 | Float switch assembly A fluid height sensor (10) includes a float (14) with an arm (20) fixed to a shaft (40) that extends into a cavity (30) in a housing (12). A switch assembly (32) in the housing includes a switch (50) formed by ... | 09/18/2007 |
| 7255037 | Switch A switch is disclosed comprising a housing formed with a chamber along which a ball can roll. An element having a pair of arms is pivotally mounted within the housing, with one arm either side of the ball, such that an inclination of the switch causes the ball to mo... | 08/14/2007 |
| 7204143 | Liquid level controller An apparatus and methods of using the apparatus are disclosed. Preferably, the apparatus includes at least a fluid level detection portion communicating with a fulcrum that provides at least a first lobe and a second lobe, and a control portion responsive to the fir... | 04/17/2007 |
| 7191649 | Water level sensor A liquid level sensor apparatus for monitoring the drain line of condensate from an air handler of a refrigeration system senses the presence of backup liquid in a vertical pipe in the drain system. A closure of the upper end of the pipe supports a magnetic switch a... | 03/20/2007 |
| 7182419 | Out of ink signal mechanism for an inkjet printer An out of ink signal mechanism for an inkjet printer having at least one inkbag is disclosed. The signal mechanism includes a printed circuit board having a circuit associated with each inkbag, a contact spring and at least one lifter. The contact spring is biased t... | 02/27/2007 |
| 7170020 | Circuit breaker and terminal cover A circuit breaker includes terminals with screws on a power supply side and a load side disposed at a front end section and a rear end section of a main body case containing a current interrupting unit and a switching mechanism. A terminal cover is detachably attach... | 01/30/2007 |
| 7140698 | Hydraulic control and operation system for a railroad car retarder A hydraulic control and operating system is provided for a railroad car retarder to control the movement of railroad cars in railroad classification yard. The system utilizes a double-acting hydraulic cylinder to operate the retarder mechanism and includes a hydraul... | 11/28/2006 |
| 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 |
| 7067749 | Float switch and mounting system assembly A float switch and mounting bracket assembly made from plastic and impervio is to corrosion, with improvements over the prior art including a wide float switch body for enhanced water displacement that results in a more responsive operation, a housing that protects ... | 06/27/2006 |
| 7067750 | Float switch and mounting system assembly A float switch assembly with a housing/clamping structure that is made from plastic and impervious to corrosion, with improvements over the prior art including a thumbscrew positioned between its two upper bracing protrusions and external braces/ribs that make it le... | 06/27/2006 |
| 7049534 | Float switch A float switch comprises a hollow main member in which a bob and a switch are provided. The switch has a bar to control a circuit therein and is connected with a wire, and the bob is connected to the bar of the switch via a L-shaped activating plate whereby the swit... | 05/23/2006 |
| 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 |
| 6992259 | Multi-purpose condensate switch A float switch made from plastic and impervious to corrosion, with improvements over the prior art including a more responsive operation resulting from use of a wide float switch body and a closely fitting housing that allow rapid shut-off of condensate production a... | 01/31/2006 |
| 6992260 | Plastic pan float switch and mounting system assembly A float switch, housing, and clamping member assembly that is made from plastic and impervious to corrosion, with improvements over the prior art including a wide float switch body for enhanced water displacement that results in a more responsive operation, a housin... | 01/31/2006 |
| 6870110 | Float switch with protective boot Disclosed herein is a fluid level float switch and protective boot therefore. The boot is adapted to engage a detent portion of the float switch in a secure watertight fashion. The boot is adapted to flexibly accommodate movement of the float within the boot in resp... | 03/22/2005 |
| 6864445 | Latching fluid level switch A latching fluid level switch which includes an elongated shaft member having a lower end and an opposite upper end with both ends containing a buoyant float member. The upper end is pivotally anchored to a tank wall and capable of having its lower end being moved b... | 03/08/2005 |
| 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 |
| 6610952 | Vacuum cleaner actuator switch A switch assembly for a wet/dry vacuum cleaner is disclosed. The switch assembly includes a switch having a movable arm to connect first and second conductive terminals with a rocker arm pivotally attached to the switch. The rocker arm is operable by an a... | 08/26/2003 |
| 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 |
| 6474952 | Sump pump motor switch assembly A sump pump motor switch assembly for a sump pump including a motor casing and an end shield, includes a switch assembly and a housing mounted to the end shield. A cam actuator is connected to the housing and a sump pump actuation switch is mounted with t... | 11/05/2002 |
| 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 a water chamber in the body to drive the water level sensor... | 07/10/2001 |
| 6254351 | Snap-acting float assembly with hysteresis A float assembly for use in actuating a switch based on the level of a fluid includes a pivot member having a pivot axis and a switching surface. First and second floats are coupled to the pivot member so that at a first fluid level the first and second f... | 07/03/2001 |
| 6239394 | Waterproof switch device A waterproof switch device is for use with an elongated actuator in a water containing chamber, and includes a top cover wall spaced apart from the chamber and having a bore for movement of the actuator in response to a reach of a predetermined water leve... | 05/29/2001 |
| 6084520 | Leak collection and supply shut off system A new leak collection and supply shut off system for closing off the supply of water and energy to a water heater in the event of a leak. The inventive device is designed for use with a water heater that has a tank, a water inlet pipe, a water outlet pipe... | 07/04/2000 |
| 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 hold the switch in a switched position until the sump is d... | 05/30/2000 |
| 6069330 | Mechanical shut-off and bypass assembly A mechanical shut-off and bypass assembly for controlling operation of a wet/dry vacuum cleaner includes a switch movable between on and off positions. A toggle member is pivotably mounted with respect to the switch and is movable to operate the switch be... | 05/30/2000 |
| 5999101 | Liquid level alarm system A liquid level alarm system is activated when liquid in a container falls below a predetermined level. The system contains an alarm located outside the container. The alarm is electrically connected to a switching device. The switching device may have a p... | 12/07/1999 |
| 5945913 | Liquid level alarm system A liquid level alarm system is activated when liquid in a container falls below a predetermined level. The system contains an alarm located outside the container. The alarm is electrically connected to a switching device. The switching device may have a p... | 08/31/1999 |
| 5872509 | Device for sensing the amount of oil in oil pans A device for sensing the amount of oil in oil pans of internal combustion engines is disclosed. In the device, a bottom plunger is fixedly mounted onto the inside bottom of an oil pan, with a contact terminal being mounted onto the top surface of the bott... | 02/16/1999 |
