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Sample metering port for analytical rotor having overflow chamber

  • US 5,242,606 A
  • Filed: 10/29/1991
  • Issued: 09/07/1993
  • Est. Priority Date: 06/04/1990
  • Status: Expired due to Term
First Claim
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1. An analytical rotor comprising:

  • a rotor body having generally horizontal top and bottom surfaces, central receptacle means for facilitating rotation of the body about a generally vertical axis, and a sample application port through the top surface;

    a horizontal inlet segment extending from the sample application port in a first direction;

    a horizontal connecting passage extending from the sample application port in a second direction;

    a metering chamber with an interior surface disposed in the rotor body horizontally separated from the sample application port and connected to the sample application port by the inlet segment to receive fluid therefrom;

    an overflow chamber disposed in the rotor body horizontally separated from the sample application port and connected to the sample application port by the connecting passage to receive fluid therefrom; and

    means for selectively directing flow from the sample application port to the metering chamber in preference to the overflow chamber such that the metering chamber will fill entirely with fluid and excess fluid will flow to the overflow chamber while the rotor body remains stationary.

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