Cartridge-based analytical instrument with rotor balance and cartridge lock/eject system
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United States of America Patent
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May 21, 2002
Grant Date -
Dec 20, 2001
app pub date -
Feb 11, 1999
filing date -
Feb 11, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The instrument includes a cartridge carousel assembly which receives analytical cartridges. The cartridges are self-contained units which incorporate a sample metering/separation system which is operated by centrifugal force. The cartridge carousel is composed of a cartridge rotor plate which includes a center and a plurality of cartridge ports which are located in spaced relation radially outward from the center of the plate. The cartridge ports include a cartridge dock which is shaped to receive the cartridges and a balance weight dock which is located radially inward from the cartridge dock. The cartridge dock is shaped to receive a balance weight. A locking mechanism is provided which holds the cartridge in the cartridge dock during rotation of the cartridge rotor plate. A balancing mechanism is provided which includes a balance weight which is movable to the balance weight dock when a cartridge is inserted into the cartridge dock. An ejection mechanism is provided which ejects the test cartridge from the cartridge port after processing of the test cartridge is completed.
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