Title:
AIR CONTROL CIRCUIT EQUIPPED WITH SAFETY FEATURE
Document Type and Number:
WIPO Patent Application WO/2022/107540
Kind Code:
A1
Abstract:
This air control circuit equipped with a safety feature is composed of only an air circuit. The circuit comprises a main air line (4) that controls an air device (3) by turning two external pilot–type solenoid valves (5a, 5b) on and off simultaneously, a pilot air line (6) that supplies pilot air to the solenoid valves (5a, 5b), and a pilot control line (7) that switches the pilot air line (6) between a supplying state and a discharging state, wherein when one of the two solenoid valves (5a, 5b) malfunctions and does not switch to the off position, the air device (3) is reset by discharging the air in the air device (3) through the other solenoid valve that switched to the off position, and reactivation of the two solenoid valves (5a, 5b) is prevented by switching the pilot air line (6) to the discharging state via the pilot control line (7).
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Inventors:
ENZAKI AKIRA (JP)
Application Number:
PCT/JP2021/038850
Publication Date:
May 27, 2022
Filing Date:
October 21, 2021
Export Citation:
Assignee:
SMC CORP (JP)
International Classes:
F15B11/06; F15B20/00
Domestic Patent References:
| WO2019072328A1 | 2019-04-18 |
Foreign References:
| US20040168729A1 | 2004-09-02 | |||
| JP2015042136A | 2015-03-02 | |||
| JPS50674U | 1975-01-07 | |||
| JPS5934162U | 1984-03-02 | |||
| JPS5694003A | 1981-07-30 |
Attorney, Agent or Firm:
HAYASHI Naoki et al. (JP)
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