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:
May. 23, 1995
Filed:
Sep. 10, 1993
Applicant:
Inventor:
Bruno Slettenmark, Jaerfaella, SE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604126 ; 604131 ; 604151 ; 604123 ;
Abstract
In a device for conveying liquids having an intermittently energized pump and a filter for retaining air bubbles preceding the input side of the pump, the filter contains an admission opening in the form of a long gap and the gap volume is greater than the conveying volume of the pump given a single pump action. Even an air bubble that nearly completely covers the gap cannot be conveyed therethrough as long as the gap is in contact with the liquid to be pumped at some location.