Digital titration device
First Claim
1. A liquid dispensing device for titration comprising, in combination, a frame, a plunger mounted for reciprocation in said frame from a retracted position to an extended position, a preloaded titration liquid containing cartridge having an open end sealed by a slidable piston cap and a nozzle at the opposite end, means for locking said open end of the liquid containing cartridge on said frame in a position wherein said cap receives said plunger whereby movement of the plunger from said retracted position toward said extended position expels liquid through said nozzle in said cartridge, a lead screw mounted for rotation in said frame, means on said frame for measuring rotation of said screw, a nut for coupling said plunger to said screw so that rotation of the screw reciprocates the plunger, and a control for selectively rotating said screw.
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Accused Products
Abstract
A liquid dispensing device for chemical titration having a reciprocating plunger for expelling fluid from an attached titrating solution cartridge, and a lead screw for reciprocating the plunger whose rotation is measured and displayed by a digital rotation counter. The plunger can be selectively uncoupled from the lead screw to permit direct plunger positioning. A pair of manual knobs allow rapid direct rotation of the lead screw or slower, geared down rotation of the screw.
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Citations
6 Claims
- 1. A liquid dispensing device for titration comprising, in combination, a frame, a plunger mounted for reciprocation in said frame from a retracted position to an extended position, a preloaded titration liquid containing cartridge having an open end sealed by a slidable piston cap and a nozzle at the opposite end, means for locking said open end of the liquid containing cartridge on said frame in a position wherein said cap receives said plunger whereby movement of the plunger from said retracted position toward said extended position expels liquid through said nozzle in said cartridge, a lead screw mounted for rotation in said frame, means on said frame for measuring rotation of said screw, a nut for coupling said plunger to said screw so that rotation of the screw reciprocates the plunger, and a control for selectively rotating said screw.
Specification