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. 01, 2026
Filed:
Sep. 23, 2025
Beijing Grand Hitek. Co., Ltd., Beijing, CN;
BEIJING GRAND HITEK. CO., LTD., Beijing, CN;
Abstract
Disclosed is a vacuum pump assembly with an improved process by-product holding capacity, including a front bearing plate (), an upper casing (), a lower casing (), a long rotor (), a short rotor (), and a rear bearing plate (); the long rotor () and the short rotor () rotate about their respective rotary shafts in opposing directions, axes of the rotary shafts of the long rotor () and the short rotor () being set parallel to each other; the multiple stages of rotor elements of the long rotor () and the multiple stages of rotor elements of the short rotor () mesh with one another correspondingly; storage grooves () are set on non-critical surfaces of rotor elements when meshing with one another. The disclosure improves process by-product holding capacity and effectively prevents pump jamming and wear caused by adhesion of the process by-product.