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. 17, 2016
Filed:
Apr. 30, 2013
Applicant:
Agilent Technologies, Inc., Loveland, CO (US);
Inventor:
John Calhoun, Lexington, MA (US);
Assignee:
Agilent Technologies, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C 28/28 (2006.01); F04C 27/02 (2006.01); F04C 18/02 (2006.01); F04C 27/00 (2006.01);
U.S. Cl.
CPC ...
F04C 28/28 (2013.01); F04C 18/0207 (2013.01); F04C 18/0215 (2013.01); F04C 27/005 (2013.01); F04C 2220/50 (2013.01); F04C 2230/80 (2013.01); F04C 2230/85 (2013.01); F04C 2240/81 (2013.01); F04C 2270/80 (2013.01); F04C 2270/86 (2013.01);
Abstract
A scroll pump has a tip seal between an axial end of the scroll blade of one of stationary and orbiting plate scrolls of the pump and the plate of the other of the stationary plate and orbiting plate scrolls. The scroll pump may have a ballast gas supply system and use the operation of the ballast gas supply system to assess the condition of the tip seal. Alternatively, the scroll pump may have two pressure sensors that sense pressure at two locations spaced along a compression mechanism of the pump to assess the condition of the tip seal.