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. 10, 1997
Filed:
Apr. 23, 1996
Steven F Meister, Chillicothe, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A push-pull valve assembly for an engine cylinder includes an engine defining a gas passageway in fluid communication with a hollow piston cylinder via a first opening and a second opening. An inward valve seat is positioned in the first opening adjacent the hollow piston cylinder. An outward valve seat is positioned in the second opening adjacent the gas passageway. A first valve member has a first stem and a first enlarged portion with an inward valve face positioned in the hollow piston cylinder. A second valve member has a second stem and a second enlarged portion with an outward valve face position in the gas passageway. The first valve member and the second valve member are operably coupled via a mechanical or hydraulic linkage. A spring is utilized to bias the inward valve face against the inward valve seat to close the first opening and the outward valve face against the outward valve seat to close the second opening.