Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1981-12-04
1984-03-13
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386418, G01F 1300, B01L 302
Patent
active
044359896
ABSTRACT:
Plunger operated pipet operable to execute different lengths of plunger movement during successive fluid pickup and fluid discharge operations or strokes. A stop member is movable between first and second locations in the pipet body to halt plunger movement at two different positions. A drive spring for driving the stop member from one location to the other is energized by a manually operable arming element and is retained in one location against action of the drive spring during a first plunger stroke. A release mechanism responsive to plunger movement during the first stroke disables the retaining means allowing the drive spring to move the stop member to the second location at which position the plunger is halted during the succeeding discharge stroke. The arming element is actuated by and in response to positioning of a replaceable tip on the pipet body. The arming element exerts a force on the tip sufficient to expel the tip from the body unless the tip is properly seated on the body thus ensuring that the pipet is armed if the tip is properly seated. A signalling system is provided which signals the occurrence of the second or fluid dispensing stroke of plunger movement.
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Precision Pipetting System, Care and Procedure, a publication of Medical Laboratory Automation Inc., 7 pp.
Operating Instructions, Eppendorff Pipet, 6 pp.
Oxford P-7000 Sampler Micropipetting System, 4 pp.
Automatic Pipet-Kimble Products, 2 pp.
Advertisement for Pipette-Rainin Instrument Co., 1 p.
Carroll Edward L.
Meyer Richard C.
Beckman Instruments Inc.
Markl S. R.
Meads R. R.
Steinmeyer R. J.
Swisher S. Clement
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