MULTI-CHAMBER PUMP APPARATUS, SYSTEMS, AND METHODS
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United States of America Patent
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Issued Date -
Mar 26, 2015
app pub date -
Apr 19, 2013
filing date -
Apr 23, 2012
priority date (Note) -
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Abstract
Disclosed are apparatus adapted to dispense and/or aspirate liquids, such as in a clinical analyzer. In one aspect, a multi-chamber pump apparatus is disclosed that has a pump body containing first and second chambers, a piston having a first piston portion of a first pump area A1 received in the first chamber, and a second piston portion of a second pumping area A2 received in the second chamber, and an actuator coupled to the piston. The first and second chambers can be selectively accessed to improve metering accuracy at dissimilar flow volumes from the chambers. Methods and systems including the multi-chamber pump apparatus are provided, as are other aspects.
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