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| Number | Title | Issue Date |
| 7896021 | Quick change check valve system A system for quickly removing and installing check valve parts without disturbing system piping attached to a pump. The system includes a first adapter attached to the outlet of the pump head. The first adapter includes a valve seat and a housing with a side wall ha... | 03/01/2011 |
| 7806673 | Gear pump A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pi... | 10/05/2010 |
| 7740399 | Dry chemical feeder for a chemical mixing system A feeder system comprising a hopper for holding dry chemical. A feed tube extends from the hopper and is for delivering dry chemical to a mixing tank. A first solenoid actuator is provided for controlling the opening and closing of a first solenoid actuated gate tha... | 06/22/2010 |
| 7175397 | Effervescent gas bleeder apparatus A diaphragm metering pump suitable for metering an effervescent gas. The pump has a pump head with a product chamber having an inlet end with a one-way inlet valve and an outlet end with a one-way outlet valve. A displaceable diaphragm member defines a boundary of t... | 02/13/2007 |
| 6930486 | Conductivity sensor A conductivity probe having a modular design. A probe body has a distal end and a proximal end. The distal end includes a recessed portion for providing a seat for an O-ring that seals an electrode tip assembly. The probe body also includes a set of internal threads... | 08/16/2005 |
| 6222371 | Hand-held fluid tester for process fluids A portable, hand-held fluid tester for testing and analyzing process fluids is provided with a volume controlled fluid reservoir. The test fluid reservoir is connected by a spillway to an overflow reservoir to provide more consistent and accurate fluid vo... | 04/24/2001 |
| 6139286 | Automatic venting back pressure valve A new and improved automatic venting back pressure valve is provided in a valve body including a back pressure chamber having a fluid inlet and a fluid outlet. A spring loaded back pressure member covers the fluid outlet which is movable between a normall... | 10/31/2000 |
| 5860793 | Diaphragm metering pump with push to prime air bleeder valve A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid... | 01/19/1999 |
| 5676531 | Autoclavable pump head assembly A new and improved liquid metering pump for use in pumping sterile fluids and foodstuffs includes a separable autoclavable pump head assembly. The diaphragm-containing pump head may be preassembled as a unit and sterilized to provide a pump head having st... | 10/14/1997 |
| 5667368 | Diaphragm metering pump including improved leak detection diaphragm A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid... | 09/16/1997 |
| 5647733 | Diaphragm metering pump having modular construction A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid... | 07/15/1997 |
| 5056036 | Computer controlled metering pump A computer controlled metering pump. The displacement of a metering pump is accurately monitored using a position sensor connected to a piston. A control computer receives the sensor signal as well as a desired pumping volume rate. The pumped volume is co... | 10/08/1991 |
| 4781535 | Apparatus and method for sensing diaphragm failures in reciprocating pumps Apparatus for monitoring the diaphragm integrity in a diaphragm pump. A single continuous circuit trace is supported on a pump diaphragm. An electrical circuit is connected to the continuous circuit trace for measuring both the continuity and a potential ... | 11/01/1988 |
