The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1984
Filed:
Jul. 30, 1982
Gerhard Buschmann, Dusseldorf, DE;
Jagenberg AG, Dusseldorf, DE;
Abstract
Apparatus for the dispensing of very small amounts of liquid includes a measuring vessel which can be filled with an amount of liquid, and to whose outlet there is connected an ejector of a partial quantity. A sensor responds to the liquid level in the measuring vessel, to control a filling system which receives therefrom a signal for the filling of the measuring vessel when the minimum permissible lower liquid level is reached and a signal for the ending of the filling process when the maximum permissible upper liquid level is reached. The sensor is a capacitor which extends at least over the entire range of the variable liquid level in the measuring vessel and whose dielectric is the liquid situated in the measuring vessel. A capacitance meter is provided for measuring the capacitance of the capacitor.