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| Number | Title | Issue Date |
| 7231821 | Vertical liquid level measuring device A system for actuating an indicator in response to a depth change in a liquid that is confined to a container comprises a housing, a float constrained to vertical movement in response to changes in liquid depth in the container, a drive rod arranged to rotate in res... | 06/19/2007 |
| 7188521 | Horizontal liquid level measuring system A liquid level measuring system includes a housing mounted to a container and a flexible coupling connected between the housing and a tubular frame suspended in a container holding a liquid. The flexible coupling maintains the tubular frame in a vertical orientation... | 03/13/2007 |
| 7117740 | Remote visual liquid quantity indicator A remote visual liquid quantity indicator comprises a flexible cable within a flexible outer sleeve and allows a user to remotely determine the level of a liquid in a container, such as an accumulator without the need for electrical power or a direct line of sight t... | 10/10/2006 |
| 6955083 | Vertical liquid level measuring device A system for actuating an indicator in response to a depth change in a liquid that is confined to a container comprises a housing, a float constrained to vertical movement in response to changes in liquid depth in the container, an actuator connected to the housing ... | 10/18/2005 |
| 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 |
| 6536277 | Level-tracing water-monitoring apparatus A water-monitoring apparatus includes a frame being installed by water. A reel is mounted on the frame. A tension cable is wound on the reel and including a lower end and an upper end. A buoy is connected with the tension cable. A control device is connec... | 03/25/2003 |
| 5552774 | Magnetically activated float switch A magnetically activated float switch apparatus is disclosed for opening and closing an electrical circuit in response to a predetermined change in the level of a liquid. The apparatus includes a float element having an interior chamber. There is a capsul... | 09/03/1996 |
| 5250768 | Float switch with snap action member A float switch for sensing a liquid level and switching between "on" and "off" states in response to the same. Overall, the device is carried within a hollow housing, with its movement restrained by the tethering action of a power cord. "Snap action" swit... | 10/05/1993 |
| 4754108 | Blow molded float switch assembly A float switch assembly for selectively energizing and deenergizing a fluid pump or other electronic equipment responsive to the rise and fall of a fluid level within a reservoir and a method and manufacturing or assembling the float switch assembly. The ... | 06/28/1988 |
| 4680437 | Adjustable float assembly for pumps A float assembly for use in tanks, sumps or other liquid-containing vessels includes an elongated, upright, extruded support which maintains individual float switches at preselected heights. The support includes upright, elongated, recess-defining walls w... | 07/14/1987 |
| 4399338 | Automatic float switch A mercury activated float switch comprises a base member, a resilient fulcrum, desirably comprising an aperture in a resilient sheet, supported on said base member and at least two flexible electrical current carrying conductors supported for pivotal move... | 08/16/1983 |
| 4147060 | Adjustable frame liquid level measuring device An adjustable liquid level measuring device for measuring the level of a liquid in a variety of container configurations. The device has an indicator means for mounting on a container for providing a visual reading related to the level of the liquid in th... | 04/03/1979 |
| 4034608 | Automotive oil gauge A device designed to replace the conventional automotive dipstick wherein the level of oil in an automotive crankcase is continually monitored by means of a direct readout on a visual gauge mounted on a vehicle dashboard or other convenient location withi... | 07/12/1977 |
