Dispenser for a liquid, in particular a bottle-top dispenser

Dispensing – Inspection devices – Graduated transparent container or trap

Reexamination Certificate

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Details

C222S205000, C222S402000, C222S450000

Reexamination Certificate

active

06860409

ABSTRACT:
A dispenser for a liquid, in particular, a bottle-top dispenser, with a cylinder/piston arrangement with a measuring cylinder (1) and a piston (2) which is capable of being displaced therein in a sealed manner, with a valve arrangement (3) connected to the piston (2), with an inlet valve and an outlet valve (5), each provided with a valve body (6) and a valve seat (7). The dispenser is characterized in that all of the parts or regions of the dispenser touched by the liquid are made entirely of a pure thermoplastic material or are coated with a pure thermoplastic material in such a manner that no contact is made by the liquid with the substrate coated with plastic material or with components of the substrate.

REFERENCES:
patent: 3189233 (1965-06-01), Wilson et al.
patent: RE28970 (1976-09-01), Shapiro
patent: 4739904 (1988-04-01), Spencer et al.
patent: 5624059 (1997-04-01), Lo
patent: 6015067 (2000-01-01), Lang et al.
patent: 6019256 (2000-02-01), Seltzer
patent: 6045010 (2000-04-01), Patterson
patent: 6135325 (2000-10-01), Fessel et al.
Barnstead International, “Complete REPIPET® JR, Calibratable Fixed Volume Dispenser”, Instructions and Parts List, pp. 1-16.
DE 197 02 773 A1; Brand “seripettot” brochure, 9943 61, 21/0898, Brand GMBH+CO Fabrik fur Laborgerate, 4 pages.
Pro Liquid “MiniDispenser Liquid Dispensing System” Short form description, Copyright© 2000 by Pro-Liquid GmbH, pp. 1-8.

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