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. 16, 1988
Filed:
Dec. 04, 1986
Derek Frost, Leigh-On-Sea, GB;
Ford Motor Company, Dearborn, MI (US);
Abstract
The invention relates to a desmodromic system in which a valve stem is arranged to be acted upon directly, or by way of rockers, by an opening cam and a closing cam rotatable together at constant or varying angular velocity in synchronism with the rotation of the engine crankshaft, and in which a compliance device is incorporated in the transmission train from the cams to the valve stem, the compliance device comprising two cup-shaped members nested together with a limited relative movement between and resiliently urged away from one another, the compliance device operating to provide zero clearance when the valve is open and maximum clearance when closed to accommodate valve recession and thermal expansion.