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:
Feb. 15, 2011
Filed:
Mar. 02, 2005
Applicants:
Sergej Lopatin, Lörrach, DE;
Helmut Pfeiffer, Steinen, DE;
Inventors:
Sergej Lopatin, Lörrach, DE;
Helmut Pfeiffer, Steinen, DE;
Assignee:
Endress + Hauser GmbH + Co. KG, Maulburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 29/00 (2006.01); H01L 41/04 (2006.01); H01L 41/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for determining and/or monitoring at least one physical or chemical, process variable of medium having at least one oscillatable unit, which produces, and/or receives, mechanical oscillations. Included is at least one tuning unit, whose stiffness is changeable and which is embodied in such a manner and connected in such a manner with the oscillatable unit, or is a part of the oscillatable unit in such a manner, that at least the resonance frequency of the oscillatable unit is changeable via the tuning unit. A corresponding method is also noted.