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:
Sep. 19, 2000
Filed:
Sep. 24, 1999
Applicant:
Inventor:
Steven J Sytsma, Muskegon, MI (US);
Assignee:
Dana Corporation, Toledo, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F / ;
U.S. Cl.
CPC ...
1231936 ;
Abstract
Pistons having holes extending from an outer face on piston lands to an interior portion of a piston are disclosed. The holes are used for venting blow-by gasses so that an oil control ring may more effectively scrape a cylinder wall. The holes are covered with special check valves to allow the gasses to be vented while not allowing oil to be pumped from the interior portion of the piston to the cylinder walls.