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| Number | Title | Issue Date |
| 7334600 | Priming apparatus for a centrifugal pump A vacuum assisted priming system for a fluid pump including a housing defining a hopper that communicates with a pump inlet. The housing mounts a first port that communicates with the source of vacuum and a second port that communicates with atmosphere. A check valv... | 02/26/2008 |
| 7331769 | Pumping system A pumping system including a fluid inlet line and a primary pump for the fluid. The primary pump includes an impeller in an impeller chamber, with the impeller chamber adapted to receive fluid from the inlet line. A suction chamber is above the impeller chamber, wit... | 02/19/2008 |
| RE39813 | Vacuum-assisted pump A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of l... | 09/04/2007 |
| 7037086 | Self-priming centrifugal pump A self-priming centrifugal pump comprises an inlet and an outlet, and a centrifugal impeller for receiving liquid from the inlet and delivering it to the outlet. An inlet valve and an outlet valve are provided, and a diaphragm arrangement is driven by the same motor... | 05/02/2006 |
| 7011505 | Pump system with vacuum source A self priming pump system that includes a motor coupled to a centrifugal pump for driving the centrifugal pump. A separator having a reservoir is provided for storing a limited amount of pumped fluid in advance of the centrifugal pump. A vacuum source provides a va... | 03/14/2006 |
| 6783330 | Self-priming centrifugal pump A priming vacuum control system for use on a self-priming pump includes a priming vacuum control valve and a priming vacuum control valve-actuating system. The priming vacuum control valve is disposed between a vacuum pump and a priming chamber for the self-priming ... | 08/31/2004 |
| 6692234 | Pump system with vacuum source A self priming pump system that includes a motor coupled to a centrifugal pump for driving the centrifugal pump. A separator having a reservoir is provided for storing a limited amount of pumped fluid in advance of the centrifugal pump. A vacuum source pr... | 02/17/2004 |
| 6682313 | Compressed air powered pump priming system A pump primer for a pump on a fire truck uses a high-speed compressed air in a venturi in a compressed air chamber to generate a vacuum in a vacuum chamber to prime a pump, with an integral valve which separates the pump from the priming ejectors (venturi... | 01/27/2004 |
| 6575706 | Vacuum-assisted pump A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent... | 06/10/2003 |
| 6409478 | Vacuum-assisted pump A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent... | 06/25/2002 |
| 6357466 | Pumping system for the injection of measured quantities of fluid into a fluid stream A pump system for the selected injection of one or more fluids is disclosed where the system generally includes a flow meter including a means to translate the flow rate through the meter to one or more pumps coupled to the meter such that upon a selected... | 03/19/2002 |
| 6315524 | Pump system with vacuum source A pumping system is disclosed that includes a vacuum source. The pumping system includes a motor coupled to a centrifugal pump and a separator defining a reservoir in fluid communication with an inlet of the centrifugal pump. A water liquid ring vacuum pu... | 11/13/2001 |
| 6071072 | Self-priming centrifugal pump A self-priming centrifugal pump has a recirculation tube connected between a hollow cylinder having a first set of impellers received therein and a first tube having liquid received therein and having a second set of impellers received in one end thereof,... | 06/06/2000 |
| 5984626 | Evacuation means for pumps The present invention is for an evacuation system which preferrably in its entirety is connected to and operates at the outlet side of a pump. The evacuation system is connected to the socket 5 by the connector 9 and one of the valves 15 or 16. In the eva... | 11/16/1999 |
| 5961299 | Fluid injector pump with interchangeable reservoir A pneumatically-operated pump is provided that includes a body having a central bore with a liquid chamber for a slidable piston injector, a chamber for a removable reservoir, and an inlet and outlet for a gas. A priming conduit carries liquid from the re... | 10/05/1999 |
| 5750023 | Self-priming pumping device for hydraulic circuits The pumping device comprises a pump driven by a motor having a stator and a permanent-magnet rotor located between polar expansions and connected to an impeller. A liquid suction duct and a liquid delivery duct are connected to the pump to define a hydrau... | 05/12/1998 |
| 5536147 | Vacuum priming system for centrifugal pumps A self-priming pump system including a vacuum priming unit and a liquid pumping unit, the pumping unit having an engine driven centrifugal pump with an intake conduit, the priming unit having a vacuum column with an internal well chamber and a vacuum cham... | 07/16/1996 |
| 5213083 | Actuating fluid pump having priming reservoir A hydraulically-actuated fuel injection system is disclosed comprising an actuating fluid sump, a high pressure actuating fluid pump having a pumping chamber arranged in fluid communication with the sump, and a priming reservoir arranged in fluid communic... | 05/25/1993 |
| 5035583 | Sewage pump priming system A vacuum priming system for drawing liquid into the pumping chamber to prime a vertical shaft centrifugal pump for pumping sewage or the like. The vacuum priming system includes a priming pump for developing a partial vacuum in the pumping chamber and cau... | 07/30/1991 |
| 4827897 | Fuel pump driving apparatus In a fuel pump driving apparatus for a vehicle engine including a fuel injection system, the selection of a plurality of energizing circuits each formed by the combination of two or all of three brushes of a fuel pump drive motor is effected in accordance... | 05/09/1989 |
| 4515180 | Valve for self-priming pump system A self-priming pump system including a priming valve for automatically providing priming liquid to a pump which has lost suction. The priming liquid is contained within the pump discharge column between a pair of spaced check valves. The priming valve is ... | 05/07/1985 |
| 4515517 | Well point system and apparatus A well point pumping system including a series of well points installed in an area of the ground which is to be dewatered or dried out. This system and its apparatus include an enclosed tank which can be located closely adjacent the well points which are ... | 05/07/1985 |
| 4249865 | Control means for preventing water overflow into vacuum type priming pump An engine driven impeller type pump for draining water from a plurality of well points is primed by an engine driven oil filled vacuum pump which is connected to the top of a vacuum chamber mounted on the impeller pump housing. A normally open solenoid va... | 02/10/1981 |
| 4183721 | Apparatus for automatically water charging a centrifugal fire pump The apparatus comprises a motor driven centrifugal pump having a suction line extending to a source of water which is located at a level below the pump. The discharge line of the pump extends to the area to be sprinkled in the event of fire. A sight glass... | 01/15/1980 |
| 4029438 | Well point pumping system and pump assembly therefor A well point pumping system which includes a series of well points installed in an area of the ground which is to be dewatered or dried out for example, before an excavation process. The well point system includes an engine driven impeller type pump usual... | 06/14/1977 |
| 4013053 | Fuel pump An electric-motor-powered centrifugal fuel pump including a vacuum control device to achieve the initial priming of the centrifugal pump. The electric motor which drives a centrifugal impeller is housed within the pump itself and, as such, is immersed in ... | 03/22/1977 |
| 3970027 | Priming means for bow steering pumps In a bow steering unit for vessels including an axial flow pump having its suction and discharge nozzles intersecting with the hull of the vessel for selectively moving water in opposite directions to maneuver and steer the vessel in corresponding opposit... | 07/20/1976 |
