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:
Jun. 13, 2006
Filed:
Aug. 24, 2004
Mitsuyuki Kobayashi, Gamagori, JP;
Yoshichika Yamada, Kuwana-gun, JP;
Hitoshi Amano, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
A fuel vapor leak check module has a pump for generating a pressure gradient between an inside and an outside of a fuel tank. The pump is driven by a motor which has driving shaft supported by a bearing. A lubricant is provided between the driving shaft and the bearing. When the pump is operated, a pressure gradient between a pump-side space and a motor-side space is generated whereby a lubricant is introduced from one of the pump-side space and the motor-side space to another, so that the introduced lubricant deteriorates the pump performance or motor performance. To avoid such a situation, communication passage is provided which communicates the motor-side space and the pump-side space. The inner pressure of the motor-side space becomes equal to that of the pump-side space.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile