Patents by Inventor Francis J. Snyder

Francis J. Snyder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hand-held fluid tester for process fluids
    Patent number: 6222371
    Abstract: 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 volumes for measurement. Improved mounting of electrodes in the test reservoir and connection to a testing printed circuit substrate provides for ease of assembly. A special temperature probe arrangement is also provided in a preferred embodiment.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: April 24, 2001
    Assignee: Pulsafeeder, Inc.
    Inventor: Francis J. Snyder
  • Diaphragm metering pump with push to prime air bleeder valve
    Patent number: 5860793
    Abstract: 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 outside sealing elements containing hydraulic fluid in the pump housing. In a preferred embodiment, a readily accessible mechanically activated hydraulic refill valve cartridge is provided to hydraulically balance the diaphragm. In a preferred embodiment, a push to prime air bleeder valve is provided permitting automatic priming of the hydraulic system without requiring disconnection of any valves. The pump is designed to interchangeably receive a number of diaphragm assemblies including an improved leak detection diaphragm and a double-sided leak detection diaphragm. In a preferred embodiment, a diagnostics window is provided permitting visual inspection of the operating condition of various valves connected to the hydraulic system.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: January 19, 1999
    Assignee: Pulsafeeder, Inc.
    Inventors: Stephen B. Muscarella, Philip T. Pascoe, Francis J. Snyder
  • Diaphragm metering pump including improved leak detection diaphragm
    Patent number: 5667368
    Abstract: 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 outside sealing elements containing hydraulic fluid in the pump housing. In a preferred embodiment, a readily accessible mechanically activated hydraulic refill valve cartridge is provided to hydraulically balance the diaphragm. In a preferred embodiment, a push to prime air bleeder valve is provided permitting automatic priming of the hydraulic system without requiring disconnection of any valves. The pump is designed to interchangeably receive a number of diaphragm assemblies including an improved leak detection diaphragm and a double-sided leak detection diaphragm. In a preferred embodiment, a diagnostics window is provided permitting visual inspection of the operating condition of various valves connected to the hydraulic system.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: September 16, 1997
    Assignee: Pulsafeeder, Inc.
    Inventors: Craig L. Augustyn, Francis J. Snyder
  • Diaphragm metering pump having modular construction
    Patent number: 5647733
    Abstract: 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 outside sealing elements containing hydraulic fluid in the pump housing. In a preferred embodiment, a readily accessible mechanically activated hydraulic refill valve cartridge is provided to hydraulically balance the diaphragm. In a preferred embodiment, a push to prime air bleeder valve is provided permitting automatic priming of the hydraulic system without requiring disconnection of any valves. The pump is designed to interchangeably receive a number of diaphragm assemblies including an improved leak detection diaphragm and a double-sided leak detection diaphragm. In a preferred embodiment, a diagnostics window is provided permitting visual inspection of the operating condition of various valves connected to the hydraulic system.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: July 15, 1997
    Assignee: Pulsafeeder Inc.
    Inventors: Craig L. Augustyn, Richard Giannetti, Travis L. James, Stephen B. Muscarella, Philip T. Pascoe, Francis J. Snyder, Erik C. VanBork