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. 10, 2005
Filed:
Nov. 14, 2002
Masayoshi Takamine, Narashino, JP;
Yasushi Maejima, Narashino, JP;
Shinji Kawanishi, Narashino, JP;
Yoshiyuki Sakaguchi, Narashino, JP;
Satoshi Okudera, Narashino, JP;
Kenji Kabata, Narashino, JP;
Yutaka Inayoshi, Narashino, JP;
Masayoshi Takamine, Narashino, JP;
Yasushi Maejima, Narashino, JP;
Shinji Kawanishi, Narashino, JP;
Yoshiyuki Sakaguchi, Narashino, JP;
Satoshi Okudera, Narashino, JP;
Kenji Kabata, Narashino, JP;
Yutaka Inayoshi, Narashino, JP;
BOC Edwards Technologies Limited, Narashino, JP;
Abstract
A vacuum pump has a pump case having a gas suction port at an upper surface thereof, a rotor shaft mounted in the pump case for undergoing rotation, and a rotor connected to the rotor shaft for rotation therewith. The rotor has inner and outer circumferential surfaces coated with a corrosion-resistant film treated by nonelectrolytic plating. Rotor blades are disposed in the pump case and are integrally connected to the outer circumferential surface of the rotor. Stator blades are integrally connected to the pump case so that the rotor blades and the stator blades are alternately positioned and arranged. A balancing body is disposed on the inner circumferential surface of the rotor for balancing the rotor during rotation thereof.