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:
Jun. 22, 1982
Filed:
Dec. 31, 1979
Applicant:
Inventors:
Assignee:
Radiometer A/S, Copenhagen, DK;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ; G01N / ;
U.S. Cl.
CPC ...
417 53 ; 417435 ; 417503 ; 7386416 ; 7342 / ; 7386463 ;
Abstract
The invention relates to a method of removing air or gas bubbles tending to collect in the 'dead space' of a piston burette or another liquid dosage piston pump during operation thereof. The venting is performed by sucking a substantial volume of air into the pump cylinder in addition to a certain amount of liquid, and the air and part of the liquid within the pump cylinder is thereafter discharged therefrom. A piston dosage pump for carrying out this method comprises a valve mechanism by means of which the pump cylinder may be selectively communicated not only with a liquid inlet conduit and a liquid outlet conduit, but also with an air inlet passage.