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:
Oct. 01, 2002
Filed:
Feb. 23, 2001
Other;
Abstract
A turbine impeller to be driven for rotation by exhaust gas of an internal combustion engine is fixed to a turbine shaft. The turbine shaft is supported by a radial bearing in radial directions and mounted to a bearing housing. The turbine shaft includes a stepped part which is formed between the turbine impeller and the radial bearing so that the outer diameter of the turbine shaft is greater at the turbine impeller side than at the radial bearing side. The bearing housing includes an oil drain for discharging oil which has lubricated the radial bearing. The distance L from a side face of the radial bearing to the stepped part is set to a value at which oil moving from an end of the radial bearing does not reach the stepped part when a turbine-revolution speed Nt is higher than that Nti which is produced by an idling operation of the internal combustion engine.