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| Number | Title | Issue Date |
| 7540718 | Hermetic compressor A hermetic compressor comprises a hermetic container, an electric motor installed inside of the hermetic container, a compressing mechanism disposed within the hermetic container and driven by the electric motor, and an oil surface detector disposed to the compressi... | 06/02/2009 |
| 7175756 | Device for treating working fluid for electric discharge machining The device for treating working fluid includes a fluid level detecting device for detecting a fluid level of cleaned fluid in a cleaned fluid tank, and a control unit for determining an adjustment value for a discharge rate command for a filter device pump, based on... | 02/13/2007 |
| 7074014 | Dipping type pump where discharging performance at a time of actuation has been improved In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving o... | 07/11/2006 |
| 7007828 | Chemical metering pump A liquid chemical metering pump (24) is described that can be fully submerged within a hazardous liquid chemical transport/storage container (28). The pump (24) includes a discharge adaptor (30) that can be received in the outlet aperture... | 03/07/2006 |
| 6453927 | Method and apparatus for precisely dispensing liquids A method and apparatus are provided for continuously dispensing precise quantities of a liquid from a dispenser holding tank into a receiving tank. A first elastic tube permits fluid flow between the holding tank and the receiving tank and a first perista... | 09/24/2002 |
| 4491150 | Outdoor water holding and pumping system An outdoor water holding and pumping system comprising a water tank into which is recessed a pump housing such that water in the tank surrounds and insulates the housing. A pump is disposed in the pump housing for pumping water from the tank to a desired ... | 01/01/1985 |
| 4488852 | Submersible pump apparatus A submersible pump apparatus for admitting air into the low pressure vortex area of the pump to control the amount of liquid material discharged, and including an improved vent and spray system for venting air from the impeller and for directing liquid ma... | 12/18/1984 |
| 4342543 | Oil level control An oil level control system uses an available pressure source to operate a fluid motor which is integrally connected with a reciprocating fluid pump. The pump has an inlet passage disposed at the desired oil level in a primary reservoir. A pair of one-way... | 08/03/1982 |
| 4215975 | Sump pump with air column therein when pump is not operating An air column is employed in a sump pump to exclude liquid and foreign matter therein from the pump interior until a time just prior to priming and pumping. Just prior to the pump being turned on the air column is vented, thus permitting the liquid to ris... | 08/05/1980 |
| 4119016 | Hydraulic control device A hydraulic control device for use in a hydraulic system having a pump supplying fluid from a reservoir to a working circuit. The control device detects leaks in the working circuit by monitoring the level of hydraulic fluid in the reservoir. In the event... | 10/10/1978 |
| 3963376 | Automatic water powered sump drainer An automatic water powered sump drainer comprises valve means, a float assembly, a venturi, means connecting one side of the sump drainer to a water supply, and means connecting the other side of the sump drainer to a drain outlet. The valve means is supp... | 06/15/1976 |
| 3952772 | Intake piece adapted for emptying containers with liquid A device for preventing the discharge of sediments and oily liquids from ships ballast tanks. The device comprises a chamber around the suction pipe which communicates with the interior of the suction pipe by apertures above the main suction aperture.... | 04/27/1976 |
