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. 07, 2010
Filed:
Apr. 28, 2005
Katsuma Tsuruoka, Kanagawa, JP;
Keigo Kajiyama, Kanagawa, JP;
Norihiro Saita, Kanagawa, JP;
Takayuki Furuya, Kanagawa, JP;
Kenji Hiraku, Ibaraki, JP;
Katsuma Tsuruoka, Kanagawa, JP;
Keigo Kajiyama, Kanagawa, JP;
Norihiro Saita, Kanagawa, JP;
Takayuki Furuya, Kanagawa, JP;
Kenji Hiraku, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a gear pump equipped with a pump assembly formed from a driving gear supported by a driving shaft, a driven gear supported by a driven shaft, a pair of side plates disposed at both sides in an axial direction of driving and driven shafts, and a seal block that seals tips of the gears and forms a first fluid chamber by installation onto the side plates, and a casing that houses the pump assembly and forms a second fluid chamber therein, ribs are provided for at least one member of the side plates or the seal block, and fluid tightness between the first and second fluid chambers is secured by exerting pressure between the side plates and seal block and additionally plastically deforming the ribs. By this, it is possible to provide the gear pump which is capable of achieving improvement of the seal integrity while reducing the parts count.