Patents Assigned to Packard Instruments Company
  • Method for verifying proper operation of a liquid sample dispenser
    Patent number: 6094966
    Abstract: A low volume liquid handling system is described which includes a microdispenser employing a piezoelectric transducer attached to a glass capillary, a positive displacement pump for priming and aspirating liquid into the microdispenser, controlling the pressure of the liquid system, and washing the microdispenser between liquid transfers, and a pressure sensor to measure the liquid system pressure and produce a corresponding electrical signal. The pressure signal is used to verify and quantify the microvolume dispensed and is used to perform automated calibration and diagnostics on the microdispenser.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: August 1, 2000
    Assignee: Packard Instruments Company
    Inventors: Roeland F. Papen, Richard E. Pelc, Nicholas S. Chibucos, Wilhelm Meyer
  • Microvolume liquid handling system
    Patent number: 6083762
    Abstract: A low volume liquid handling system is described which includes a microdispenser employing a piezoelectric transducer attached to a glass capillary, a positive displacement pump for priming and aspirating liquid into the microdispenser, controlling the pressure of the liquid system, and washing the microdispenser between liquid transfers, and a pressure sensor to measure the liquid system pressure and produce a corresponding electrical signal. The pressure signal is used to verify and quantify the microvolume dispensed and is used to perform automated calibration and diagnostics on the microdispenser.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: July 4, 2000
    Assignee: Packard Instruments Company
    Inventors: Roeland F. Papen, Richard E. Pelc, Nicholas S. Chibucos, Wilhelm Meyer