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:
Sep. 09, 2025
Filed:
Nov. 15, 2022
Pfeiffer Vacuum, Annecy, FR;
Pierre-Emmanuel Cavarec, Annecy, FR;
Cécile Chavanne, Annecy, FR;
Nicolas Varennes, Annecy, FR;
Alysson Bruno Barbosa Moreira, Annecy, FR;
PFEIFFER VACUUM, Annecy, FR;
Abstract
A turbomolecular vacuum pump includes a stator, a rotor to rotate inside the stator, and a motor to drive the rotation of the rotor. The turbomolecular vacuum pump further includes a temperature sensor to measure the temperature of the rotor and a creep maintenance meter to determine an incremental change in the creep of the rotor over a predetermined duration from the temperature of the rotor, as measured by the temperature sensor, from the rotational speed of the rotor, from the value of the creep of the rotor, and from the look-up table, to increment the rotor-creep value by the determined creep increment, and to determine, based on the incremented creep value, a data item indicative of the remaining time for which the rotor can run before needing preventive maintenance for creep.