Measuring and testing – Measuring vessel
Patent
1976-05-03
1977-10-18
Swisher, S. Clement
Measuring and testing
Measuring vessel
222146C, B01L 302
Patent
active
040540626
ABSTRACT:
A hand-held micropipettor having a construction to impede transfer of heat from a handle to a portion enclosing a piston chamber, and means for drawing room air along the piston to effect its cooling when the micropipettor is operated. A compressible piston seal is held in place with a retainer urged in an axial direction by a resilient element with an uniform force independent of the position of the piston.
REFERENCES:
patent: 3834590 (1974-09-01), Robinson
patent: 3855868 (1974-12-01), Sudvaniemi
patent: 3935734 (1976-02-01), Keegan
Oxford Laboratories Inc.
Swisher S. Clement
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