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:
Feb. 11, 2003
Filed:
Feb. 05, 2002
Theodore H. Becker, Jr., Chillicothe, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
A valve arrangement includes a valve member that rotates within a valve guide such that a frictional wear area is unlikely to occur on a discrete location of the valve stem and/or the valve guide. The valve guide includes a bore, the bore defining a longitudinal axis and a helical bore groove. The valve member includes a valve head and a stem, the stem being guided for reciprocal movement within the valve guide. The valve stem reciprocates within the valve bore and includes a helical stem groove. As the valve stem reciprocates within the valve bore, the helical bore groove and the helical stem groove interact to impart an axial rotation to the valve member about the longitudinal axis.