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:
May. 13, 2014
Filed:
Oct. 10, 2008
Atsushi Inoue, Gyoda, JP;
Atsushi Inoue, Gyoda, JP;
Surpass Industry Co., Ltd., Gyoda-shi, Saitama, JP;
Abstract
There is provided a suck back valve system in which problems in the suck back function are resolved. In a suck back system including an integral-type suck back valve in which an on/off valve that performs opening and closing operations by a first pneumatic actuator has a suck back function of preventing liquid dripping by means of a diaphragm that moves with the closing operation and a protective on/off valve provided at the upstream side adjacent to the integral-type suck back valve as a measure against malfunction in the integral-type suck back valve and performing opening and closing operations by a second pneumatic actuator, an opening and closing control unit is provided that, during the fully closing operation of the integral-type suck back valve, completes the fully closing operation of the protective on/off valve earlier than full closing of the integral-type suck back valve.