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:
Mar. 12, 2002
Filed:
Oct. 16, 1998
Applicant:
Inventors:
Duane P. Littlejohn, Manlius, NY (US);
W. Peter Schubert, Manlius, NY (US);
Assignee:
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/944 ; H01J 4/900 ;
U.S. Cl.
CPC ...
B01D 5/944 ; H01J 4/900 ;
Abstract
A method for forming the seat in a pulsed sampling valve used in a FTICR MS. The valve has a ceramic ball that closes against the seat to thereby seal the passageway that is used for introduction of sample into the FTICR MS vacuum chamber. The material from which the seat is formed is chosen to withstand relatively high operating temperatures and a precise deburred hole is drilled in that material. The pre-load spring exerts a force against the ball when the valve is assembled. The force initially exceeds the yield strength of the seat material to deform the material to form the seat.