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:
Aug. 30, 1983
Filed:
Feb. 10, 1981
James E Foley, Sebastian, FL (US);
Other;
Abstract
An internal combustion engine having a plurality of cylinders, at least one of the cylinders having cam-activated exhaust and intake ports and cam lobes shaped to provide selective maintenance of the exhaust port in either a continuously or periodically opened condition and the intake port in either a continuously or periodically closed condition. The cam lobes may be positioned upon a camshaft which is slidingly and rotatably disposed such that it is capable of shifting between first and second positions. The cam lobes may define first and second surfaces which activate the exhaust and intake ports as the camshaft moves from the first to the second position. The cam surfaces which maintain the exhaust and intake ports in the continuously opened and closed conditions respectively, may be cylindrical and concentric to the camshaft.