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:
Mar. 12, 2019
Filed:
Jun. 13, 2016
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Shinya Imamura, Ibaraki, JP;
SHIMADZU CORPORATION, Kyoto-shi, JP;
Abstract
A plunger seal is mounted on the pump head, has a through hole for allowing penetration of the plunger, and holds the outer circumferential surface of the plunger and also seals an opening of the pump chamber. A backup ring is mounted on the pump head by being interposed between the plunger seal and the tip end surface of the pump body. The backup ring has a through hole, for allowing penetration of the plunger, formed in a manner not allowing the plunger seal to enter a gap to the outer circumferential surface of the plunger, and also has a liquid passage element for allowing the cleaning liquid in the cleaning space to reach the plunger seal through the through hole.