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. 18, 1993
Filed:
May. 22, 1991
Osamu Suzuki, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
In an assembly method of the rotary shaft in use for a ball-bearing type turbocharger, there includes steps of inserting an inner race of the first ball bearing into a rotary shaft to locate it in proximity of a turbine impeller before disposing the rotary shaft into the center housing; inserting a sleeve into the rotary shaft before mounting the second ball bearing on the rotary shaft; applying a compensation force to the inner race of the first ball bearing by way of the sleeve so as to bring one side of the inner race into a tight engagement with a boss portion of the turbine impeller, a magnitude of the force falling within a range from 20% to 120% of an axial force applied in the direction along the rotary shaft when the compressor impeller is secured to the rotary shaft by tightening the screw nut; releasing the compensation force from the inner race of the first ball bearing, and carrying out imbalance-correction of the turbine impeller prior disposing into the center housing.