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. 29, 2002
Filed:
Sep. 30, 1999
Atsuyuki Miura, Aichi-ken, JP;
Koichi Nakayama, Chiryu, JP;
Yoshihiro Naito, Nagoya, JP;
Toyoki Furuhashi, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A vacuum pumping apparatus includes a pump housing and a motor housing The housings and are fastened together so as to be a sealed structure by O-rings interposed therebetween. A shaft of a driving device and a driving shaft carrying a rotor are detachably connected via a coupling During operation of the apparatus, a rotor chamber in the pump housing and a motor chamber in the motor housing are equalized in pressure, which requires no mechanical seal therebetween. The coupling facilitates easy removal or detachment of a motor part B from a pump part A, which results in convenient maintenance of the pump part A.