Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1983-10-13
1985-09-10
Spitzer, Robert H.
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386424, 74202, 74206, 422100, B01L 302, G01N 114
Patent
active
045398542
ABSTRACT:
In a fluid metering system, a plunger actuated syringe is coupled to at least one source of fluid, and a highly accurate friction drive is coupled to the plunger for moving fluid to a delivery outlet. The friction drive has a rack having a flat side and a rotatable circular drive shaft, or pinion, pressed against the flat side of the rack for moving the same by friction. Opposed guide rollers engage the rack in opposition to the flat side in straddling relation with the pinion for urging the rack thereagainst. A moveable swing arm supports one of the guide rollers against the rack. A spring leverages the swing arm and guide roller against the rack and transmits the force to the pinion. A positioning rod is provided for securing the swing arm and the moveable guide roller in a plane perpendicular to the flat side of the rack to prevent lateral motion of the rack and pinion whereby inaccuracies in the system may be minimized.
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Bradshaw Randolph F.
Carey Glen A.
Corning Glass Works
Spitzer Robert H.
Voyce B. D.
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