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. 13, 1986
Filed:
May. 18, 1984
Applicant:
Inventors:
Tomoyuki Shibata, Kanagawa, JP;
Mitsuhito Nakayama, Kanagawa, JP;
Assignee:
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415197 ; 4151 / ; 4152 / ;
Abstract
A submersible pump especially usable for civil engineering works is provided in which a wear resistant protecting member is disposed at the portion opposing the backside of an impeller shroud to protect that portion from wear due to abrasion by earth and sand contained in the liquid handled by the pump. The protecting member is provided with holes or portions similar to holes which are adapted to surround the exposed portions of the bolts so as to prohibit the liquid flow from directly contacting the bolt portions with flowing speed or kinetic energy so that wear of the bolts is prevented.