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. 18, 2005
Filed:
Apr. 08, 2004
Applicants:
Keisaku Iwakata, Oyama, JP;
Kenji Mihara, Oyama, JP;
Inventors:
Keisaku Iwakata, Oyama, JP;
Kenji Mihara, Oyama, JP;
Assignee:
Komatsu Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16J015/32 ;
U.S. Cl.
CPC ...
Abstract
An oil seal () includes a first seal () for sealing an engine () side and a second seal () for sealing a flywheel () side. The first seal () is an axial seal abutted on an inner ring () from the direction along the axial direction of a crank shaft (). The second seal () is a radial seal abutted on the inner ring () from the direction along the radial direction of the crank shaft (). A communication hole () is provided on the second seal (), thereby preventing a space () surrounded by the first seal (), the second seal () and the inner ring () from the occurrence of the negative pressure.