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:
Aug. 02, 1983
Filed:
May. 14, 1981
Applicant:
Inventors:
Johan K Fremerey, Bonn, DE;
Bernd Lindenau, Julich, DE;
Assignee:
Kernforschungsanlage Julich GmbH, Julich, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73700 ;
Abstract
A rotary measuring body for a gas-friction vacuum meter has its surface formed with a macroscopic roughness which provides a gas-friction coefficient minimally affected by the microscopic roughness of the surface. As a result, the output signal and sensitivity of the vacuum meter is high and is less susceptible to change as a result of surface corrosion.