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:
Apr. 16, 2019
Filed:
May. 17, 2017
Applicant:
Ckd Corporation, Komaki-shi, Aichi, JP;
Inventors:
Assignee:
CKD CORPORATION, Komaki-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 51/02 (2006.01); F16J 1/00 (2006.01); F16K 1/46 (2006.01); G05D 16/20 (2006.01);
U.S. Cl.
CPC ...
F16K 51/02 (2013.01); F16J 1/008 (2013.01); F16K 1/46 (2013.01); G05D 16/2053 (2013.01); G05D 16/2093 (2013.01);
Abstract
A vacuum valve placed between a vacuum vessel and a vacuum pump to adjust a valve opening degree using an operating fluid includes a packing mounted in a recessed groove of a piston. The packing is provided with a contact portion on a radially inner side and a contact portion on a radially outer side, and a slide-contact portion contacting with an inner peripheral surface of a cylinder. A portion between the contact portion and the slide-contact portion has a thin thickness.