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:
Jul. 22, 1986
Filed:
Jan. 16, 1984
Applicant:
Inventors:
Assignee:
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C / ; F04C / ;
U.S. Cl.
CPC ...
418259 ; 2915 / ;
Abstract
A hollow rotor for movable vane pumps and the like having a pair of right and left cup-shaped bodies each being separately shaped from steel or aluminum alloy in the form similar to either of axially bisected parts of a complete rotor. The right and left cup-shaped bodies have the respective open side faces abutted and joined to each other by butt resistance welding to be incorporated into the complete hollow rotor.