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. 21, 2015
Filed:
Apr. 18, 2012
Applicants:
Yoshiaki Aso, Kyoto, JP;
Kumiko Jingu, Kyoto, JP;
Fujio Inoue, Kyoto, JP;
Inventors:
Assignee:
SHIMADZU CORPORATION, Kyoto-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 53/14 (2006.01); F04B 13/00 (2006.01); F04B 53/16 (2006.01);
U.S. Cl.
CPC ...
F04B 53/143 (2013.01); F04B 13/00 (2013.01); F04B 53/162 (2013.01);
Abstract
A plunger seal has a cylindrical protruding portion on its front face. A base end portion of the protruding portion has a recessed curved shape having a certain curvature. In a portion of a pump head, where the plunger seal is mounted, a seal insertion portion into which the protruding portion of the plunger seal is to be fitted is formed as a cylindrical recessed portion. An opening edge portion of the seal insertion portion has a protruding curved shape having the same curvature as the base end portion of the protruding portion of the plunger seal.