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| Number | Title | Issue Date |
| 7004023 | Method and a system for level measurement of a liquid in containers The present invention is concerned with a method and a system for hydrostatic level readings of liquids in a container comprising the steps of providing a pressure sensor capable of determining a pressure value in a suction pipe, correlating said result to a predete... | 02/28/2006 |
| 6926121 | Oil filter cap with ball valve anti-sticking device A cap for sealing an outer end of an oil filler tube of an engine where the oil filler tube has an inner end with ball valve having a float ball and mating valve seat for impeding any reverse flow of oil during engine operation. The cap includes a sealable plug mati... | 08/09/2005 |
| 6819250 | Out-of-liquid sensor, and liquid supply device using same The present invention provides a highly universal out-of-liquid sensor that allows an out-of-liquid condition to be accurately detected for a long time, and provides a liquid supply device using the same. The out-of-liquid sensor 1, that is mounted in a liqui... | 11/16/2004 |
| 6604418 | Liquid-level detection method and device thereof An ALC circuit is turned on (S1), a nozzle is shifted to a sampling position (S2), and after the ALC circuit has been turned off (S3), the nozzle is allowed to start discharging air from its tip (S4). While the nozzle is being lowered, the inner pressure ... | 08/12/2003 |
| 6332357 | Suction-type liquid measuring device and method of feeding molten fluid utilizing same An inlet/outlet pipe extending downward from a bottom face of a body for a ladle is bent at its tip end into an S-shape in an intermediate portion of the pipe, and its tip end is located at a level higher than that of the bent portion. When a negative pre... | 12/25/2001 |
| 5722289 | Cooking appliance with level detection apparatus and method A deep fat fryer system includes a vat for holding a quantity of cooking medium. A tube or conduit is disposed between a position in the vat corresponding to a lower desired level of cooking medium in the vat and a blower for creating a vacuum in the tube... | 03/03/1998 |
| 5372031 | Device for vacuum testing of closed systems The vacuum tester has a housing which is small enough to be held in one hand in which is contained a small vacuum pump, an activator switch and a vacuum gauge. A non-return flap valve, or check valve, is disposed between the vacuum pump and the vacuum gau... | 12/13/1994 |
| 4991434 | Method and apparatus for determining whether a liquid in a reservoir is above a certain level Apparatus for determining whether a liquid in a liquid reservoir is above a certain level includes suction means operable by a user to create suction when the user desires to determine if the liquid in the reservoir is above the certain level, a conduit e... | 02/12/1991 |
| 4949070 | Locomotive lubrication level monitor A lubricant level monitor for gear covers of locomotives uses a vacuum probe tube to determine if the lubricant is below a predetermined level. The vacuum is only activated if the locomotive has been at rest for a predetermined period of time, so that the... | 08/14/1990 |
| 4587535 | Liquid jet apparatus with pressure sensor for indicating absence/presence of liquid An ink jet recording apparatus comprises: at least one ink jet head to emit a recording ink; main and sub ink tanks to store the ink which should be supplied to the head; a negative pressure generating device to generate a negative pressure to supply the ... | 05/06/1986 |
| 4549164 | Liquid volume indicator A sensing device for determining the amount of liquid in an oil crankcase of a vehicle. A hollow dipstick, closed at one end and having a metering hole therein, is inserted into the crankcase of a car. The other end of the dipstick is connected by flexibl... | 10/22/1985 |
| 4422327 | Liquid level indicator apparatus A liquid level indicator apparatus including a selecting device intended to indicate the level of at least two liquid bodies. The apparatus comprises a chamber having a display tube and containing an indicator liquid. An air passage is connected between t... | 12/27/1983 |
| 4417232 | Liquid volume indicator A sensing device for determining the amount of liquid in an oil crankcase of a vehicle. A hollow dipstick, closed at one end and having a metering hole therein, is inserted into the crankcase of a car. The other end of the dipstick is connected by flexibl... | 11/22/1983 |
| 4192186 | Fluid level and visual inspection device A device enabling the operator of an internal combustion engine to visually inspect the quality and level of a fluid held within an associated fluid sump of the engine, transmission, or other adjacent fluid sump. The device operates directly from the vacu... | 03/11/1980 |
| 4108201 | Sensing probe for gravity induced flow liquid level regulator A liquid level sensing probe for gravity induced flow liquid level regulators used for maintaining a desired level of a liquid in a sump of a device having moving components within or adjacent the sump, such as maintaining a desired oil level in the crank... | 08/22/1978 |
| 4072053 | Apparatus for indicating liquid level in a receptacle An indicating apparatus for enabling a motor car driver to read the crankcase oil level by depressing a diaphragm forming part of an indicating unit. The diaphragm then opens and closes connections between a measuring tube reaching down into the crankcase... | 02/07/1978 |
| 3972234 | Liquid level indicator A liquid level indicator as applied to an internal combustion engine, having a crankcase forming an oil reservoir therein, has conduit means extending downwardly generally into the reservoir with a lower open end of said conduit means being positioned at ... | 08/03/1976 |
| 3935835 | Apparatus for checking the level of liquid in containers Apparatus for checking the presence of liquid at a predetermined level in a container is disclosed. The apparatus comprises valve means disposed externally of such container, manually operable suction means to generate vacuum pressure and connected to the... | 02/03/1976 |
