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:
May. 17, 2016
Filed:
Nov. 03, 2010
Applicant:
Sung Gi Kim, Seoul, KR;
Inventor:
Sung Gi Kim, Seoul, KR;
Assignee:
Doosan Infracore Co., Ltd., Incheon, KR;
Primary Examiner:
Int. Cl.
CPC ...
F16J 10/04 (2006.01); F02F 1/20 (2006.01); F16J 1/08 (2006.01);
U.S. Cl.
CPC ...
F16J 10/04 (2013.01); F02F 1/20 (2013.01); F16J 1/08 (2013.01);
Abstract
The present disclosure relates to a cylinder having an inner wall formed with fine uneven patterns to improve durability. The fine uneven patterns according to the present disclosure increases oil film pressure between a piston ring and an inner wall of the cylinder, and smoothly supplies engine oil to where the engine oil is insufficient, thereby reducing abrasion between the piston ring and the inner wall of the cylinder.