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| Number | Title | Issue Date |
| 7094135 | Abrasivejet cutting head with back-flow prevention valve An abrasivejet cutting head is disclosed that includes a valve assembly for preventing back-flow to the abrasive hopper of abrasive-laden fluid from the cutting head when the discharge path for the abrasivejet becomes clogged or otherwise blocked. The valve assembly... | 08/22/2006 |
| 6736603 | Oil suction pump An oil suction pump includes a push switch, a shaft vertically located below the push switch, and a float arm horizontally located below the shaft. A hooked lower end of the shaft is adapted to detachably engage with a hooked first end of the float arm and thereby h... | 05/18/2004 |
| 6537036 | Flow amplifying pump apparatus A flow amplifying pump apparatus includes a body member that defines a flow passageway and a compressed air inlet. The body member includes a main segment and an insert segment which extends into a container and rotates relative to the main segment. A cov... | 03/25/2003 |
| 6527518 | Water-powered sump pump A water-powered sump pump that utilizes a relatively higher pressure water ported through a self-reversing valve to a reversible stroke power cylinder having a movable member mechanically coupled to a pumping chamber for movement of a movable pumping memb... | 03/04/2003 |
| 6334758 | Pump-ejector compression unit and variants A pump-ejector compression unit is furnished with a receiver, and a mixing chamber of a liquid-gas ejector and a separator are located inside the receiver. An outlet of the mixing chamber is connected to the separator, the receiver is partly filled with a... | 01/01/2002 |
| 6224345 | pressure/vacuum generator A pressure/vacuum generator is established by coupling the pressure port of a vacuum generator to an air pressure source while coupling a valve in fluid communication with the exhaust port of the vacuum generator. When the valve is in a normally open cond... | 05/01/2001 |
| 5836745 | Fluid recovery apparatus and method using a motive force An apparatus for recovering fluid from a liquid formation includes a submersible pump for pumping fluid from the liquid formation. The submersible pump is coupled to an eductor defining a fluid member for receiving and transporting the fluid from the pump... | 11/17/1998 |
| 5613835 | Flow control apparatus for a water powered sump pump A water powered sump pump has a flow control apparatus connected to a source of water under pressure and to a suction generator. Water from the flow control apparatus flows through a nozzle in the suction generator, creates a pressure drop, suck water in ... | 03/25/1997 |
| 5511950 | Vacuum pumps for recovering condensates from steam-using apparatus A condensate recovering vacuum pump uses the condensate in a condensate tank as the boiler feed water. A circulating pump supplies the feed water to the feed-water ejection nozzle of a jet pump. The condensate collected from the steam trap of the steam-us... | 04/30/1996 |
| 5302088 | Water powered sump pump A water powered sump pump has a control housing connected to a source of water under pressure and to a drain pipe located in a sump. An outlet pipe leads from the control housing to a suction generating assembly in communication with the drain pipe for en... | 04/12/1994 |
| 4520836 | Freezeproof valve assembly An improved freezeproof valve assembly is provided for a water hydrant, such as an outdoor drinking fountain or the like. The valve assembly comprises a sump housing for installation below the ground frost line and for connection between a water supply pi... | 06/04/1985 |
| 4482299 | Water powered sump pump A water powered sump pump having an ejector with an inlet end and a discharge end and enclosed within a housing providing support for the ejector. A control chamber about the inlet end of the ejector has a diaphragm valve which operates to control communi... | 11/13/1984 |
| 4231420 | Heat exchanger with controls therefor A heat exchanger fabricated from a plurality of plates arranged in spaced parallel relation with one another as a stack or assembly that is positioned between pressure plates. The stack of plates are arranged to define fluid and vapor passages with the en... | 11/04/1980 |
| 4159735 | Plate-fin heat exchanger with controls therefor A heat exchanger fabricated from a plurality of plates arranged in spaced parallel relation with one another and assembled as a stack between pressure plates. The assembled stack of plates have top, bottom, and side cover members with one of the side cove... | 07/03/1979 |
| 4095626 | Vapor recovery in a liquid dispensing unit Vapors displaced from a volatile liquid container, such as a vehicle's fuel tank, during refilling of the container are recovered by a system employing a liquid jet gas pump to produce a suction in a vapor removal conduit. The liquid jet gas pump draws th... | 06/20/1978 |
| 4060341 | Automatic auxiliary jet sump pump An auxiliary jet sump pump, particularly for use with a main conventional electrical sump pump or the like, as a substitute pump in the event the main pump is inoperative, or as a supplemental pump in the event the capacity of the main pump is exceeded. T... | 11/29/1977 |
| 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 |
