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. 20, 2005
Filed:
Mar. 06, 2003
Keisaku Iwakata, Oyama, JP;
Tomoki Shimauchi, Oyama, JP;
Keisaku Iwakata, Oyama, JP;
Tomoki Shimauchi, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A two liquid type oil sealhaving a first sealand a second sealis provided with a communication holein the first sealThe communication holecommunicates a spacedefined by the first and second sealsand a crank shaftwith a gapbetween an outer casingand the first sealNegative pressure induced in the spaceis eliminated by sucking air from the outside through the communication holewhile lubrication oil having entered into the spaceis removed from a groovewhich is formed in the first and second sealsthereby it is possible to restrain the first and second sealsfrom being worn.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile