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:
Jul. 10, 2012
Filed:
Jul. 19, 2007
Masahiro Inagaki, Kariya, JP;
Shinya Yamamoto, Kariya, JP;
Makoto Yoshikawa, Kariya, JP;
Yuya Izawa, Kariya, JP;
Masahiro Inagaki, Kariya, JP;
Shinya Yamamoto, Kariya, JP;
Makoto Yoshikawa, Kariya, JP;
Yuya Izawa, Kariya, JP;
Abstract
A housing () of a Roots pump () supports a drive shaft () and a driven shaft () with radial bearings () so as to be rotatable. The housing () is formed by joining an upper housing member () to a lower housing member (). The lower housing member () has lower bearing support portions (), and the upper housing member () has upper bearing support portions (). Opening edges () of each lower bearing support portion () are positioned above the centers (P) of the bearings (). An opening width (T) of each lower bearing support portion () is smaller than the diameter (D) of the bearings (). This structure suppresses the bearings () from being separated from the lower housing member () during an assembling operation of the fluid machine.