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:
Oct. 19, 1999
Filed:
Aug. 24, 1998
Mark Freeland, Farmington Hills, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A hydraulic lash adjuster mechanism for an internal combustion engine having a body portion with a bore formed in the body portion having a bottom surface. A plunger having a top surface is slidingly received within the bore of the body portion. The plunger has an internal channel with a bleed hole formed therein connecting the top surface of the plunger to a high pressure chamber formed between the bottom surface of the bore and the bottom of the plunger. The body portion has a valve opening formed therein that is in fluid communication with an engine fluid supply. A check valve mechanism selectively opens and closing the valve opening in response to pressure differences between the engine fluid reservoir and the high pressure chamber. The diameter and length of the bleed hole and the force applied to said top surface of said plunger control the leak down rate of the hydraulic lash adjuster to eliminate lash in the engine valve train components.