Patent · US Expired

Sample metering port for analytical rotor having overflow chamber

US5242606A · kind A · utility

120Cited by

19References

21Claims

0Family size

Assignee

Abaxis, Inc. · US

Inventors

Boris Braynin · San Jose, US
Tammy Burd · Palo Alto, US
Steven N. Buhl · Cupertino, US
Carol T. Schembri · San Mateo, US

Key dates

Filing date	Oct 29, 1991
Grant date	Sep 7, 1993
Priority date	—
Expiry date	Oct 29, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T436/2575
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An analytical rotor for separating plasma whole blood comprises a rotor body having a sample application port in an upper surface thereof. Blood introduced to the sample application port is metered into a metering chamber by capillary flow while the rotor remains stationary. Excess blood passes into an overflow chamber by capillary flow, either simultaneously with the metered flow or after opening of a vent in the overflow chamber. Subsequent rotation of the rotor causes metered blood in the metering chamber to flow into a receiving chamber, typically a plasma separation chamber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.