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:
Dec. 07, 2004
Filed:
Mar. 12, 2003
BOC Edwards Technologies Limited, Narashino, JP;
Abstract
A vacuum pump adopts a positioning structure in which stator blades and spacers are arranged in the radial direction of a pump case by the contact between the outer peripheries portion of the stator blades and the inner periphery portion of the pump case and the contact between the outer periphery portions of the spacers and the inner periphery portion of the pump case. Accordingly, the spacer interposed between the upper and lower stator blades can have a simplified shape that serves a function of only setting the spacing between the stator blades to a prescribed length, thus decreasing the number of steps and costs of processing the spacer, and accordingly reducing the costs of the entire vacuum pump.