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:
Jun. 13, 1995
Filed:
Oct. 31, 1994
Thomas G Lawrence, Clarkston, MI (US);
Gregg T Black, Livonia, MI (US);
Chrysler Corporation, Highland Park, MI (US);
Abstract
A mechanically driven centrifugal air compressor for an internal combustion engine has an impeller shaft supported in a compressor housing with journal bearings. A helical pinion gear is formed on one end of the impeller shaft and an impeller is attached to the other end. A thrust ring mounted on the impeller shaft near the impeller is sandwiched by a thrust bearing and the nearest journal bearing to axially locate the impeller shaft. An integral pulley and internal helical ring gear of molded plastic is rotatably supported on the compressor housing with the pulley engaged by a belt that is driven by a pulley of larger diameter fixed to an engine crankshaft. The ring gear meshes with the pinion gear to provide a high overdrive speed ratio at a low noise level in series with the belt and pulley drive from the engine crankshaft which provides a low overdrive speed ratio. The thrust bearing bears the axial load on the impeller shaft imposed by air pressure acting on the impeller and the lead of the helical pinion gear is set in a direction so that the gears impose an axial force on the impeller shaft that is opposite the impeller imposed axial force to substantially reduce the axial load borne by the thrust bearing.