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:
Aug. 21, 2012
Filed:
May. 14, 2007
Yongwei Shi, Chiba, JP;
Yuji Takahashi, Chiba, JP;
Yongwei Shi, Chiba, JP;
Yuji Takahashi, Chiba, JP;
Edwards Japan Limited, , JP;
Abstract
The distance h between a base end face() of a stator-blade-wheel outer ring partand the corresponding rotor-blade end face(), is set at a value larger than the maximum deformation of the running rotor blade wheelduring the pump operation. The larger distance h keeps perfectly stator-rotor separation, while the outer ring partof a stator blade wheelgoes, in assembling, into the rotor area on account of large shift of any half of stator blade wheels owing to the wide cutting width. It makes also easy stator blade wheel assembling of the pump, as it is allowable to arrange half stator blade wheels with some eccentricity.