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:
Aug. 08, 2023
Filed:
Jul. 01, 2021
Cosmo Instruments Co., Ltd., Tokyo, JP;
Akio Furuse, Tokyo, JP;
Satoru Sasaki, Tokyo, JP;
COSMO INSTRUMENTS CO., LTD., Tokyo, JP;
Abstract
A gas leak sensing device includes a constant flow rate control valve, a pressurization control valve, a supply-side gas circuit, a master-side gas circuit, a workpiece-side gas circuit, an equal pressure valve, an exhaust valve, a test pressure sensor, and a differential pressure sensor. The supply-side gas circuit is connected with the constant flow rate control valve and the pressurization control valve. The equal pressure valve performs opening and closing between the supply-side gas circuit and the master-side gas circuit and opening and closing between the supply-side gas circuit and the workpiece-side gas circuit. The exhaust valve performs opening and closing between the workpiece-side gas circuit and outside. The test pressure sensor detects pressure in the supply-side gas circuit. The differential pressure sensor detects a differential pressure between the master-side gas circuit and the workpiece-side gas circuit.