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:
Jan. 19, 2021
Filed:
Jun. 17, 2019
Smc Corporation, Chiyoda-ku, JP;
Akira Enzaki, Bando, JP;
SMC CORPORATION, Chiyoda-ku, JP;
Abstract
A vacuum valve includes a main flow channel that connects the first port and the second port, a main valve seat that surrounds the main flow channel, a main valve disc that opens and closes the main flow channel by contacting and separating from the main valve seat, a sub-flow channel that is formed inside the main valve disc, a sub-valve seat that is formed on an outer surface of the main valve disc, a sub-valve disc that opens and closes the sub-flow channel by contacting and separating from the sub-valve seat at a position outside the main valve disc, and a rod that causes the main valve disc and the sub-valve disc to open and close. The sub-valve disc opens and closes the sub-flow channel by being operated directly by the rod, and the main valve disc opens and closes the main flow channel by being operated via the sub-valve disc by the rod.