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. 09, 1976
Filed:
Sep. 30, 1975
Hubert Koukol, Bad Nauheim, DT;
W. C. Heraeus GmbH, Hanau, DT;
Abstract
A valve ahead of a continuously running exhaust pump allows air to be sucked through the piping of a burette from the intake capillary and, after the capillary is lowered into the input sample vessel, a quantity of the sample liquid flushes out any remaining traces of a previous sample. After the necessary small quantity of the sample liquid has been thus pulled into and out of the burette, the valve is closed and a piston with a conical head fitting right into the burette draws in a measured quantity of the sample from the input container and then discharges it into the output container. The vertex of the piston is flattened so that the channel through the burette head will not be closed off when the piston is driven all the way into the burette head.