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:
Jun. 22, 2021
Filed:
May. 30, 2019
Trinity Industrial Corporation, Aichi, JP;
Katsuhiro Ishikawa, Aichi, JP;
Naohiro Osawa, Aichi, JP;
TRINITY INDUSTRIAL CORPORATION, Aichi, JP;
Abstract
A valve device that can be activated by pilot air of comparatively low pressure though the size of such valve device is small and provides a valve device that is excellent in durability. The valve device comprises a pilot port which pilot air is supplied to activate a piston part, and a biasing means to press the piston part in the opposite direction to supply and discharge the pilot air, thus controlling the opening and closing of the valve. A first magnetic member is provided on a valve rod; a second magnetic member is provided on a housing. Magnetic attraction is generated between both magnetic members to activate the piston part in the first direction, thus increasing such magnetic attraction by the approach of both magnetic members. An arrangement-relation facing each magnetic member through an air gap is set even when making its closest approach.