G - Physics – 01 – N
Patent
G - Physics
01
N
73/103
G01N 1/10 (2006.01) G01F 11/02 (2006.01)
Patent
CA 1212262
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 comprises 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 movable 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. Means is provided for securing the swing arm and the movable 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.
451620
Bradshaw Randolph F.
Carey Glen A.
Corning Glass Works
Gowling Lafleur Henderson Llp
LandOfFree
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