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:
Nov. 26, 2013
Filed:
Jun. 01, 2005
Yoshihito Yoshihara, Kashihara, JP;
Yoshiaki Hamasaki, Kashiba, JP;
Takashi Taniwa, Kashihara, JP;
Katsutake Asano, Kashiwara, JP;
Yoshihito Yoshihara, Kashihara, JP;
Yoshiaki Hamasaki, Kashiba, JP;
Takashi Taniwa, Kashihara, JP;
Katsutake Asano, Kashiwara, JP;
JTEKT Corporation, Osaka, JP;
Abstract
In a pump apparatus having a reduction chamber for reducing pulsation of a hydraulic fluid pressurized in a pump section on the way of a discharge channel having an opening in the outer surface of the housing of the pump section, a remaining fluid inflow prevention pipe having one end fitted into and fixed to the discharge channel between the outer surface and the reduction chamber and the other end positioned in the reduction chamber is provided, and a seal lip for fluid-tightly sealing the space between the inner wall of the discharge channel and the one end is provided on the outer circumference of the one end. The seal lip is formed in a shape tapered toward the discharge side. Further, the outside diameter of the other end of the remaining fluid inflow prevention pipe is made larger than the inside diameter of the discharge channel.