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. 02, 2002
Filed:
Apr. 24, 2001
Mark A. Leimer, Fort Wayne, IN (US);
Dana Corporation, Toledo, OH (US);
Abstract
The present invention is a valve stem seal assembly module for installation over a valve guide of an internal combustion engine. The module includes a seal retainer and an elastomeric annular seal circumferentially and frictionally contained within the retainer. The retainer is defined by an elongate cylindrical body having an annular flange at its lower end and at least one radially inwardly extending first boss at its upper end. A separate annular spring retainer has a lower radially outwardly extending second boss that interlockingly engages the first boss of the seal retainer, and an upper radially outwardly extending flange; a valve return spring extends longitudinally between and engages respective flanges of spring and seal retainers. The spring is effective to provide resilient engagement of first and second bosses prior to assembly, whereby the spring and seal retainers are telescopingly interconnected to facilitate installation of the module in a pre-assembly mode.