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:
Feb. 13, 1990
Filed:
Apr. 20, 1989
Iwaji Shiomi, Tokyo, JP;
Haruki Nakao, Tokyo, JP;
Nikki Co., Ltd., Tokyo, JP;
Abstract
A gas separation/extraction apparatus comprises a tank for separating and extracting a specific gas element from a gas mixture, the tank containing an adsorbent for adsorbing the gas element from the gas mixture, a pump having a cylinder and a piston housed therein, the pump being adapted to alternately pressurize and decompress the inside of the tank as the piston reciprocates, a first three-way solenoid valve connected between an exhaust port of the tank and a suction port of the pump, a second three-way solenoid valve connected between a discharge port of the pump and the suction port of the tank, and a pressure balance unit connected between the second three-way solenoid valve and a suction port of the tank, and adapted gradually to eliminate a difference in pressure between the tank and the pump as the tank is switched from a decompressed state to a pressurized state.