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:
Dec. 21, 2010
Filed:
Jul. 29, 2005
Klaus Bittner, Krefeld, DE;
Michael Kussmann, Duesseldorf, DE;
Klaus Bittner, Krefeld, DE;
Michael Kussmann, Duesseldorf, DE;
Hach Lange GmbH, Berlin, DE;
Abstract
Feed devices for liquid samples serve to convey liquid samples, for example to convey a liquid sample from waste water in a waste water treatment plant so as to monitor the treatment process. Known feed devices feed continuously at relatively low speeds. Films may accrete in the feed line that hinder the feeding and may react with the liquid sample. Therefore, the feed line must be cleaned frequently. In view of this, it is the object of the invention to improve the handling and the maintenance of a feed device for liquid samples. According to the invention, this object is solved by the fact that the feed pump () feeds in a pulse-like manner and the feed pump () as well as the feed line () are configured such that the expansion volume of the feed line () during the feed pulse is at most 50% of the pulse volume. Thereby, the feed line is cleaned and kept free of accretions.