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:
Oct. 28, 2008
Filed:
Nov. 21, 2006
Per Björkman, Palsböle, AX;
Urs Wälchli, Chur, CH;
Hansjakob Hanselmann, Oberschan, CH;
Stanislav Duris, Frümsen, CH;
Martin Wüest, Malans, CH;
Per Björkman, Palsböle, AX;
Urs Wälchli, Chur, CH;
Hansjakob Hanselmann, Oberschan, CH;
Stanislav Duris, Frümsen, CH;
Martin Wüest, Malans, CH;
Inficon GmbH, Bad Ragaz, CH;
Abstract
A shield arrangement for a vacuum measuring cell has a tubular shield housing encompassing a shield and an exit port for connection to a vacuum measuring cell and a connection opening for the object space to be measured. The shield is between the two openings and is implemented as a screw shield with spiral convolutions, its thread flange in the outer diameter being in contact on the inner wall of the shield housing such that a gas throughflow between the outer diameter of the thread flange and the inner wall is inhibited and is substantially forced into the spiral thread flight, and the exit port is on one side of the tubular section and the connection opening is on the other, opposite side and the screw shield is implemented such that in the axial line of vision the shield arrangement between the two openings is optically tight.